Investing

Betterment’s trading execution methodology Enhancing execution quality through managed trading Betterment already manages rebalancing and tax optimization at scale—but there’s another layer of value working behind the scenes: execution. This paper focuses on how Betterment improves trade execution through intelligent design and infrastructure. Our system doesn’t just serve one segment of users; it applies equally across the platform, enabling everyone to tap into scalable benefits that were once reserved for institutions. One key aspect is our use of marketable limit orders—orders placed near or slightly better than the current market price so they can execute immediately. This type of order is designed to strike a balance between speed and price control: it seeks a fast execution while placing a guardrail on how far the price can drift. For clients, this means greater protection during periods of market volatility—helping ensure that trades don’t fill at prices significantly worse than expected. Another foundational element is our use of an omnibus trading structure. Rather than executing each individual order separately, Betterment aggregates client trades allowing us to batch and route them more efficiently. This method helps us access deeper liquidity and potentially reduce overall execution costs. Through features like scheduled trade windows, omnibus aggregation, and a design that favors round-lot execution, Betterment helps minimize structural trading disadvantages, reduce exposure to adverse selection, and increase the potential for improved pricing. These execution benefits compound with scale and are embedded directly into the trading experience. The result is greater fairness, efficiency, and cost-effectiveness for every investor on the platform. The challenge in retail execution Retail trading has evolved significantly in recent years, fueled by technological innovation and increased market accessibility. However, key structural disadvantages persist for individual investors, especially when it comes to small, odd-lot orders and immediate execution strategies. Betterment’s managed execution framework—aggregating and scheduling trades throughout the day—offers a powerful and scalable alternative designed to reduce costs, mitigate execution risk, and better align with the realities of market structure. While trades are scheduled into structured windows, they are executed multiple times during the trading day to balance timeliness with the opportunity for aggregations. Betterment does not net opposing orders; each trade is routed externally to our clearing partner. Market structure and the importance of round lots In equity markets, trade size plays a critical role in determining execution quality. A round lot—currently defined as 100 shares for the majority of tickers—is the standard unit recognized by exchanges and market makers. These trades are included in the National Best Bid and Offer (NBBO), prioritized in routing decisions, and eligible for execution in institutional venues. Even mixed-lot orders that include at least one round lot (e.g., 105 shares) benefit from this visibility, often improving pricing for the entire trade. In contrast, odd lots—any order smaller than a round lot—are excluded from the NBBO and typically experience lower priority, reduced transparency, and worse pricing. These orders dominate retail investor flows and often result in less favorable execution. Legal scholar Robert P. Bartlett III analyzed more than 3 billion U.S. equity trades in his 2021 paper and found that odd-lot orders received roughly 10% less price improvement than round lots. This is due to reduced visibility, exclusion from public quotes, and lower priority by execution venues. Trades of 99 shares were particularly disadvantaged compared to trades of 100, even when both were placed simultaneously. High-volume stocks like Amazon (AMZN) illustrated this disparity clearly—Bartlett estimated that over 30% of odd-lot trades in AMZN could have received better pricing if executed as round lots. Betterment’s managed trading approach is designed to help mitigate these penalties by systematically aggregating client flows to reach round-lot thresholds, increasing the likelihood of more favorable outcomes. Quantifying the impact: price discrepancies between lot sizes A core feature of Betterment’s execution strategy is aggregating client orders to cross the round-lot threshold wherever possible. This is not just a preference; it is a response to well-documented execution disadvantages that odd-lot orders face. To illustrate what that kind of pricing difference could mean in dollar terms, consider VTI, a highly liquid security frequently traded by Betterment clients. We selected VTI because it shares characteristics with AMZN—both are heavily traded by retail investors, benefit from high liquidity, and are broadly popular. As of May 2025, VTI trades at approximately $280 per share. If an odd-lot trade receives even just 2 basis points worse pricing than a round lot, this translates to a cost penalty of approximately $0.14 per share for odd-lot executions. For a 15-share odd-lot trade: this means a $2.10 higher cost. For someone investing $5k/month, this means roughly $30 a year in higher costs. Over a 30-year period, this could equate to more than $3,400 in missed gains, assuming 8% yearly growth. The pricing examples presented in this paper are based on internally derived simulations that reflect market behavior consistent with the cited peer-reviewed research. These examples are intended for illustrative purposes only, are not meant to communicate potential performance of any investment strategy, and are not predictive of execution outcomes for any individual trade. This pricing inefficiency compounds quickly and has significant implications when managing client assets at scale. Betterment’s execution engine is designed to help reduce this cost by structurally creating opportunities to aggregate orders into round lots. In line with our regulatory obligations, we aim to achieve best execution—a regulatory standard that requires seeking the most favorable terms reasonably available under prevailing market conditions. This includes evaluating factors such as price, speed, likelihood of execution and settlement, and overall cost. Betterment does not delay trades to form round lots, but it uses a system of time-based trade windows and an omnibus aggregation strategy to opportunistically cross the round-lot threshold when client order flow naturally aligns. This allows us to systematically access the more favorable pricing conditions typically associated with round-lot trades—potentially reducing cost and improving execution outcomes for clients. While our model is designed to improve execution quality in the aggregate, individual trade outcomes may vary depending on market volatility, order size, and venue-specific factors. Trade windows as a mechanism for better execution Most retail brokers execute trades continuously, immediately passing orders to the market. While this appears fast and transparent, it exposes clients to harmful microstructure dynamics. High-frequency traders (HFTs), for example, exploit real-time signals to capture spread value, often at the expense of slower retail flows. Betterment mitigates this by batching trades into scheduled trade windows. These windows operate throughout the day and function similarly to frequent call auctions—a concept studied by Budish, Cramton, and Shim (2015). Their research shows that batched execution reduces the arms race in trading latency, promotes fairness, and narrows spreads. Though Betterment does not run formal batch auctions, our windows are intended to serve a similar purpose: reducing predictability, concealing intent, and improving average execution. This design also lowers market impact by consolidating demand. Liquidity providers can see larger, more regular flows instead of a noisy, fragmented stream. A single larger order is more likely to attract competitive pricing because it signals meaningful interest and is easier for liquidity providers to match against existing supply. For example, multiple clients buying SPY over the same trade window are combined into one order, reducing slippage—the difference between the expected price and the actual execution price—and improving fills, or the likelihood that the entire order will be completed promptly at a desirable price. Execution in practice: Betterment’s strategy At Betterment, trades are executed in windows throughout the day. Each window consolidates similar trades—buy or sell, same ticker—into a single order, executed through an omnibus structure. Trades are routed through Apex, our clearing and trading partner, to venues offering a competitive combination of price, liquidity, and fill reliability, with round-lot opportunities prioritized. We work to achieve best execution in all trades routed through this process. This structure introduces flexibility without sacrificing fairness. Betterment does not delay execution for the sake of creating a round lot, but we design the system to allow aggregation when practical. If immediacy is necessary—such as at day-end—we will execute whatever lots are available.1 We also monitor managed accounts for rebalancing and tax-loss harvesting (TLH) opportunities. When Betterment’s trading algorithm evaluates client accounts for tax loss harvesting and rebalancing opportunities, it generally prioritizes identifying potential tax loss harvests ahead of potential rebalancing opportunities. This activity also plays a meaningful role in how we strive to optimize outcomes alongside our execution practices. When clients’ orders align, aggregation and scheduling increase the likelihood of a favorable outcome. 1Betterment reserves the right to delay trading under certain circumstances; more information about our trading practices and policies is available in our Form ADV. To support oversight of Betterment's execution quality, Betterment has established a formal Best Execution Committee tasked with oversight of execution quality. This committee performs a regular and rigorous review of trading outcomes, assessing execution quality across market centers using key metrics such as basis point deviation from market price at placement (placement strike), routing behavior, peer comparisons, and arrival price analysis. Evaluations are made across ticker, order size, and timeframes. Aggregation in action: a comparative scenario To further illustrate how aggregation leads to better execution, consider this example where three clients submit small trades around the same time. When routed individually, these odd-lot orders are exposed to the same disadvantages outlined earlier—such as worse pricing due to exclusion from the NBBO. But when aggregated into a single round-lot trade, the order gains visibility and priority, increasing the likelihood of receiving better pricing. Client Orders Without Aggregation With Aggregation Alice: Buy 35 shares Executed at $135.02 = $4,725.70 100 shares executed at $135.00 = $13,500.00 Bob: Buy 40 shares Executed at $135.01 = $5,400.40 Carol: Buy 25 shares Executed at $135.03 = $3,375.75 Total Cost Impact Total: $13,501.85 (varied, higher prices) Total: $13,500.00 (uniform, better pricing) Illustrative purposes only. Prices shown do not reflect actual client execution results. This example reinforces the earlier point about execution quality differences between odd-lot and round-lot trades—such as the estimated 2 basis point disadvantage found in high-volume stocks like VTI. A consolidated 100-share order, like the one shown here, is more likely to attract competitive pricing from liquidity providers because it is easier to match against existing supply and signals meaningful demand. This example illustrates a core insight: retail investors are disadvantaged when fragmented. But when they act collectively—via an automated platform like Betterment—they gain access to efficiencies normally reserved for large institutional traders. Delivering institutional benefits to retail investors Betterment’s model is designed to translate institutional market advantages into a retail context. Institutional desks execute trades strategically—splitting orders, timing placements, and waiting for liquidity. These techniques aren’t usually available to individuals, but Betterment’s platform replicates many of them algorithmically. By aggregating trades to reach round lots, using structured time-based execution, and accessing liquidity intelligently, Betterment customers may benefit from pricing and execution quality similar to what’s typically associated with institutional standards. This parity is especially powerful in volatile or illiquid conditions, where fragmented execution can be costly. Conclusion and client-centric outcomes Managed trading, as implemented by Betterment, is a deliberate, research-driven strategy to overcome the inherent flaws in retail execution. We combine trade scheduling, order aggregation, and a neutral fee structure to deliver meaningful advantages to individual investors. Our model does not guarantee better execution on every trade, but in the aggregate, it enhances pricing, reduces slippage, and levels the playing field. Betterment believes that balancing immediacy and opportunity is key. Betterment may wait to aggregate trades to seek improved execution, which we believe is a rational tradeoff. Betterment clients are not sacrificing control—they’re gaining efficiency. Over time, this system is designed to create small but consistent enhancements in return, aligning with our core mission: helping clients make the most of their money. References Bartlett, R. P. III. (2021). Modernizing Odd Lot Trading. Columbia Business Law Review. Budish, E., Cramton, P., & Shim, J. (2015). The High-Frequency Trading Arms Race: Frequent Batch Auctions as a Market Design Response. Quarterly Journal of Economics. American Economic Association. Research and publications on equity market structure and trading practices. NYU Stern School of Business. Faculty research on market microstructure and fairness. Australian Centre for Financial Research (ACFR). Market design and equity structure studies.

How SIPC insurance protects against the loss of cash and securities And how this one backstop helps build trust across markets. Key takeaways Investors across the industry benefit from SIPC insurance, which provides coverage in the event of a broker-dealer failure, not market losses. All brokers (including Betterment) are required to be SIPC members. Industry safeguards like audits and asset segregation make SIPC claims exceptionally rare. Trust makes the world go round, and the same goes for markets. So when more than a million customers place their trust in us—along with $63 billion in assets—we don’t take it lightly. We put multiple measures in place to help safeguard their assets. Beyond these, investors also benefit from one industry-wide backstop—SIPC insurance. Though rarely called upon, it reinforces confidence across markets. So let’s break down what it is, why it matters, and why you’ll likely never need it. An explanatory brochure is also available upon request or at sipc.org. SIPC insurance comes into play when securities go missing One of the biggest misconceptions about this type of insurance relates to what it actually safeguards you from. It doesn’t protect against market losses (wouldn’t that be nice). Instead, it insures against broker failure. SIPC insurance protects against the loss of cash and securities held by a customer at a financially-troubled SIPC-member broker. Congress created it after the “paperwork crunch” crisis of the late 1960s, when outdated technology and a surge in trading volume led to backlogs at several brokers. When a market crash then caused many of those same brokers to go belly-up, they weren’t able to account for all their customers' securities. So similar to when the bank failures of the Great Depression led to FDIC insurance, legislators created the SIPC and its related guarantee to restore confidence in the financial system. Unlike the FDIC and banks, however, all brokers (including Betterment) are required to be SIPC members. How SIPC insurance works Okay, let’s talk numbers. SIPC insurance protects securities customers of its members up to $500,000 (including $250,000 for claims for cash). But crucially, this limit applies to each account with a “separate capacity” at each SIPC-member broker. Examples of separate capacities include: individual accounts joint accounts accounts for a corporation accounts for a trust created under state law IRAs Roth IRAs accounts held by an executor for an estate accounts held by a guardian for a ward or minor In the event that a broker goes bankrupt, a judge appoints a trustee to sort through their books and distribute assets back to their clients. SIPC insurance only comes into play if assets can’t be recovered and returned to their owners. Why it’s highly unlikely you’ll need it As important as this protection is, chances are, you won’t actually need it. That’s because brokers are required to abide by a series of regulations that seek to stabilize and strengthen securities markets. They must segregate their own assets from their clients’ assets, for example, making it less likely that securities get lost in the fray. This separation is also important because it protects your securities from creditors. Because of guardrails like these, SIPC proceedings have been increasingly rare since the dust settled from the “paperwork crunch” of the late 60s, in spite of there having been roughly 40,000 brokers and SIPC members since its inception. Usage has faded even more in the recent past, with no cases in the last 7 years, and fewer than two cases per year since the turn of the century. Invest with confidence at Betterment Every investment carries some level of risk—but that risk should come from market movement, not from your broker. That’s why the brokerage industry operates under clear safeguards: firms must segregate customer assets, maintain sufficient capital, and undergo regular oversight. Betterment follows these same standards—helping you stay focused on your goals, backed by the same protections that support confidence across U.S. markets.

The proactive strategy behind passive investing And when actively-managed funds may give your portfolio an edge. Key takeaways Passive and active investing strategies both require proactive planning while differing in their end goals. Passive investing seeks to match market returns, typically by way of index or exchange traded funds that closely mirror a market. Passive funds cost significantly less on average and often perform better in more efficient asset classes like U.S. Large Cap stocks. Active investing aims to beat the market by selecting the specific securities you or a manager believe will outperform relative to their peers. Active funds cost 10x more on average, but tend to perform better in less efficient classes such as U.S. core bonds. Many institutional investors—Betterment included—employ a mix of both strategies. Of all the confusing ‘this or that’s’ of investing, few are more misleading than the choice between ‘active’ and ‘passive’ strategies. Passive sounds hands-off—but in practice, it’s anything but. Take our automated investing offering. While it uses a blend of both strategies, it falls more on the passive end of the spectrum. Yet on any given trading day, we’re … Scanning for tax loss harvesting opportunities by the minute Executing thousands of trades to keep customers’ portfolios humming Researching dozens of new funds, slotting in new options quarterly to improve our portfolios’ desired exposures at lower cost And every year, we refresh the asset weights of all our portfolios, making sure they align with the latest global market environment and long-term projections. Pretty lively for a passive strategy, no? So if passive investing is a bit of a misnomer, what exactly sets it apart from more "active" approaches? And which situations are each best suited for? For those helpful distinctions, let’s start with their respective mission statements. Two missions, two mindsets Both passive and active investing involve someone, sometimes a “retail” investor such as yourself, sometimes a single professional or an entire firm, making decisions on what to invest in. The key difference boils down to their objectives and related costs: With active investing, you're aiming to beat the market by selecting the specific securities you believe will outperform their peers. While the costs of actively-managed funds are trending downward, they’re still 10x more expensive on average than that of their passively-indexed peers. With passive investing, you're seeking to simply match a market’s returns. A lower bar, for sure, but also at a lower cost. The fees or “expense ratios” charged by passive funds often fall below 0.10%. Which is better? Well, beating the market is easier said than done, especially in the long run. Consider the S&P 500, for example, the most popular pick in the market for U.S. Large Cap stocks. Fewer than 15% of similar actively-managed funds have outperformed it for stretches of five years or longer. But that doesn't mean there’s no role to play for active investing, even for the long-term, risk-averse investor. Some markets aren't as accurately priced or “efficient” as the S&P. With the right expertise and right access to information, there’s relatively more value to be had in smaller markets like those in developing countries, and even more so in bond markets. The question then becomes, who’s the best at sniffing out those deals? When investing in an actively-managed fund, you’re investing in the team behind it as much as the securities themselves. Conducting due diligence on the team and their track record is critical. That’s why when using these types of ETFs in our portfolios, we use a robust quantitative and qualitative research approach to size up the teams behind them. There’s also the matter of niche markets, and whether a passive index fund is even available. One such example is the Academy Veteran Bond ETF (VETZ), one of the newest actively-managed funds we’ve brought on board. VETZ mainly invests in loans to active and retired U.S. service members and the survivors of fallen veterans, making it ideal for both active management and our Socially Responsible Investing’s Social Impact portfolio. Lastly, a lot of everyday investors simply enjoy directing some portion of their investing themselves. When we surveyed Betterment customers about their overall investing habits, ¾ of them said they mix in some self-directed investing alongside their managed portfolios. There’s nothing wrong with a little responsible fun like this. Picking your own securities—even alongside a managed portfolio—can be exciting and educational. And all that choice naturally leads to the next big difference between active and passive investing. The building blocks of a portfolio Some of the active/passive split can be seen in a given portfolio’s pieces, and how granular the investor gets. Do you want to start at the individual security level, picking single stocks and bonds yourself, or paying someone to do that for you? Or would you rather zoom out and start with funds that track a predetermined list or “index” of said securities? These can cover entire asset classes, like treasury bonds, or represent a “sub-asset” slice of a market, like short-term treasury bonds. Stock indexes are weighted by the current value of the companies within them. These market "capitalizations" ebb and flow, of course, so the makeup of indexes and the funds that track them naturally evolve over time. They're "self-cleansing" in that sense. Lower performers make up less and less of the index over time, just as higher performers become bigger slices. It's why the bulk of the S&P 500 today looks very different than it did 20 years ago. The shape-shifting S&P (top companies by market valuation) 2025 2005 1. Nvidia Corp (NVDA) 1. GE Aerospace (GE) 2. Microsoft Corp (MSFT) 2. Exxon Mobil Corp (XOM) 3. Apple Inc (AAPL) 3. Microsoft Corp (MSFT) 4. Alphabet Inc (GOOG) 4. Citigroup Inc (C) 5. Amazon.com Inc (AMZN) 5. Walmart Inc (WMT) Source: FactSet There's also the hybrid “smart beta” approach to index fund investing. Here, a fund manager starts with a preset index before actively tailoring it based on a set of quantitative investment factors. We offer one such option in the form of the Goldman Sachs Smart Beta portfolio, which invests more heavily in companies with at least one of the following factors: They’re cheap relative to their accounting value. They tend to be sustainably profitable over time. Their returns are relatively low in volatility. They’ve been trending strongly upward in price. Use the right tool for the job All of this may be a lot to take in. But we can simplify things by bringing it all back to the big picture. Active investing seeks to beat the market. It’s typically higher-cost, and comes with relatively higher risk. In specific use cases, however, an experienced team can outperform related indexes. Passive investing aims to replicate market returns at a lower cost, often over the long-term. It starts with the building block of funds instead of individual securities. As is so often the case with investing, this isn’t an either/or proposition. We use both strategies—and sometimes a blend—at Betterment, because each has a role to play in building wealth. Regardless of whose hands are guiding your investing, we give you the tools to grow your money with confidence.

A guide to solo 401(k)s for self-employed individuals If you're self-employed, here are five reasons why a solo 401(k) might just be one of the best ways to supercharge your retirement savings. If you work as a freelancer, solo-consultant, or individual small business owner, you’ve likely wondered: How should I save for retirement? Wonder no more, here’s your answer… Meet the solo 401(k): Solo 401(k)s are often overlooked in the world of retirement accounts, but they can be an effective way for self-employed individuals to save. Solo 401(k)s offer flexibility, high contribution limits, and tax benefits. What is a solo 401(k)? A solo 401(k) is essentially a 401(k) plan for self-employed individuals or business owners who don’t have full-time employees beyond themselves (and possibly their spouse). It works similarly to a regular 401(k)—with employee and employer contribution options—but is designed specifically for those without other full-time employees. It offers more flexibility than options like SEP IRAs (which only allow employer contributions) or SIMPLE IRAs (with lower contribution limits). Many people mistakenly think solo 401(k)s are complicated or only for high earners, but the truth is that they’re pretty straightforward, and they’re great for self-employed individuals of all income levels. Top 5 benefits of solo 401(k)s for self-employed individuals Benefit 1: Solo 401(k)s are tailored for entrepreneurs like you If you're a sole proprietor, freelancer, or gig worker, you know how challenging it can be to balance inconsistent income with long-term financial goals. A solo 401(k) lets you ramp up your contributions in profitable years and scale back if your income takes a dip. You can also contribute as both the employee and the employer, giving you more ways to save. Another big perk is the ability to make contributions for your spouse. If they’re also working with you, they can contribute to the solo 401(k) with earnings from your business, potentially doubling your retirement savings. This may also help reduce your household’s taxable income if you’re making pre-tax contributions. Benefit 2: High contribution limits One of the standout features of a solo 401(k) is the ability to make both employee and employer contributions: Employee contribution: In 2025, you can contribute up to $23,500 as an employee. And if you're over 50, there’s an additional benefit: You can make "catch-up" contributions of up to $7,500 for ages 50-59 and over age 64, and “super-catch-up” contributions of up to $11,250 for ages 60-63. Employer contribution: As the business owner, you can contribute up to 25% of your net self-employment income (20% for sole proprietors and partnerships). In total, you can contribute $70,000 (not including catch-up contributions) to your solo 401(k) in 2025. This means more room for tax-deferred growth and larger savings overall. Benefit 3: Tax advantages Solo 401(k)s offer some excellent tax benefits that can help reduce your tax burden today while saving for retirement. Pre-tax contributions: If you want to lower your taxable income now, you can contribute pre-tax dollars to your traditional solo 401(k). This helps to reduce your current tax bill, which is especially helpful in high-income years. Roth contributions: Many solo 401(k) plans also allow you to make Roth contributions. This means you pay taxes on the money now, but qualified withdrawals in retirement are tax-free. Offering both pre-tax and Roth options gives you flexibility in managing both your current and future tax situations. SECURE 2.0 tax credit: Betterment includes an Automatic Contribution Arrangement of three percent per pay period, allowing new plans to claim a $500 tax credit per year for three years. Benefit 4: No income limits for Roth contributions Unlike Roth IRAs, solo 401(k)s don’t have income limits for making Roth contributions. If your income is too high to qualify for a Roth IRA, you can still contribute to a Roth solo 401(k) and enjoy tax-free growth. Benefit 5: Prior year contributions for new plans Thanks to the SECURE Act 2.0, solo 401(k) plans now come with a neat little trick: You can set up a solo 401(k) after the new year and still contribute for the previous year. For example, if you set up a solo 401(k) in March 2025, you can still make 2024 contributions until your tax filing deadline (April 15, or October 15 with an extension). This gives you a chance to catch up on retirement savings that may have slipped through the cracks. Getting started: Choosing a solo 401(k) provider When it comes to setting up your solo 401(k), you’ll want to choose a provider that makes things simple. Look for one that offers transparent fees, easy-to-use digital tools, and a solid track record of compliance and recordkeeping. Additionally, you may want to consider solo 401(k) providers that offer a range of financial services like cash accounts or investing services, that way you can consolidate your financial life onto one platform. Meet the Betterment solo 401(k) Betterment’s solo 401(k) is a low-cost investment option designed for the self-employed. Here’s what you get with Betterment’s solo 401(k): 100% digital setup. No paperwork or mailing checks. Open and manage your account entirely online. Unique flexibility. You have the option to open a traditional or Roth solo 401(k), and your spouse can contribute, too. Expert-built portfolios. Choose from our selection of low-cost exchange-traded funds (ETFs) to help you build wealth over the long term. $1,500 tax credit. Plans include automatic contribution arrangements and potentially qualify for a tax credit of up to $500 per year for three years. Higher contribution limits. You can contribute $70,000 (plus up to $11,250 more in catch-up contributions depending on your age) with a solo 401(k).

Solo 401(k)s vs. SEP IRAs: Sizing up your saving options while self-employed Both retirement accounts offer high contribution limits, but which one is right for you? If you’re self-employed, you likely wear several ill-fitting hats: accountant, admin, HR rep. And that last one is low-key important, because it means no one is setting up a retirement plan for you. So what's a gig worker, small business owner, or solo practitioner to do? There’s the trusty IRA, of course. But its tax benefits phase out at certain income levels, and its $7,000 annual contribution limit fills up fast. You may want—or need—to save more to realize your retirement goal. Luckily, two lesser-known retirement accounts offer self-employed workers 10x more capacity for tax-advantaged investing: the solo 401(k) and the SEP IRA. They’re similar in that sense (high contribution limits), but they also differ in some important ways. We’ve found that for many self-employed workers, choosing between the two often hinges on their hiring or lack thereof: 👉 No employees beyond a spouse, and no plans to hire? Consider a solo if you prioritize Roth access and a slight edge in contribution limits. Consider a SEP if you prioritize less administrative work. 👉 See yourself hiring a few employees in the not-so-distant future? Consider starting with a solo 401(k), then transitioning to a group 401(k) plan if you prioritize Roth access and more flexibility in how you structure employee contributions. Consider a SEP for slightly easier admin, and the ability to pause contributions to your employees’ SEPs during down years. 👉 Planning to expand beyond 5-10 employees at some point? Consider the solo-to-group 401(k) move for more flexibility in how you structure employee contributions. You can max out your own retirement savings, for example, while letting employees decide their own contribution rates. That’s the TL;DR version. For a deeper dive, let’s compare the two accounts across a few categories: High contribution limits Easy admin Roth access Small business growth High contribution limits Both accounts let you save plenty for retirement—upwards of $70,000 a year—but solos give you a couple of ways to stretch that even further: Case #1: You’re playing catch-up If you're age 50 or older and catching up on your retirement savings, a solo 401(k) offers additional “catch-up” contributions of $7,500 each year, or $11,250 for those 60-63. Note that starting in 2026, any catch-up contributions must go into a Roth solo specifically (more on those below) if you received more than $145,000 in FICA wages (salaries, commissions, etc.) the prior year from your solo’s sponsoring company. Case #2: You’re a middle class super saver Say you earn less than $280,000, but you save well above the standard advice of 10-15% for retirement. In this scenario, you may run up against the SEP’s 25% compensation cap before you reach its overall $70,000 limit. But with solos, you can contribute as both an employer (up to 25% of compensation) and an employee (up to $23,500) until you hit the overall limit. ⚖️ Advantage: solo 401(k) Easy admin Both a solo 401(k) and SEP IRA, assuming they’re streamlined digital offerings such as ours, are simple to set up. You can open a Betterment SEP entirely online, while a Betterment solo requires a quick call with our Licensed Concierge team to get the ball rolling. Each account type is relatively low maintenance as well. Neither a SEP nor a solo require annual paperwork, with the one exception being for solo 401(k) balances that exceed $250,000. In that case, the IRS requires solo owners (aka “sponsors”) to file Form 5500-EZ. While we’re not a tax advisor, and always recommend working with one, the form is relatively straightforward to fill out. ⚖️ Advantage: SEP IRA Roth access Solos and SEPs are designed for retirement, so the IRS gives special tax treatment to both account types. But in practice, solos give you not one but two different flavors of tax treatment to choose from: You can contribute with pre-tax dollars via a traditional solo 401(k), lowering your taxes now and freeing up more money to invest. You also have the ability to contribute with after-tax dollars via a Roth solo 401(k), enjoying tax-free withdrawals in retirement. And Roth solo 401(k)s come with two added bonuses: Unlike traditional retirement accounts, they’re not subject to Required Minimum Distributions (RMDs) in retirement. Unlike Roth IRAs, they come with no income limits of any kind. Roth SEP IRAs, meanwhile, have technically been allowed by the IRS since 2023, but few providers have rolled them out yet. ⚖️ Advantage: Solo 401(k) Small business growth At some point in your self-employed journey, you may bring on hired help. In this case, it’s possible to transition both account types to accommodate employees. Some SEP providers let you shift from a solo practitioner to an employer who contributes to employees’ SEP IRAs on their behalf. But there’s a catch: you must contribute the same amount to their SEPs as you do your own, which may prove challenging depending on your business. With solo 401(k)s, on the other hand, you can include a spouse from the get-go, provided they’re an employee or co-owner of the business. And if you see the potential for expanding beyond a handful of employees down the road, it may make sense to simply transition your solo 401(k) to a group 401(k) plan and enjoy more flexibility in how you structure contributions for your team. Our support team handles moves like this often and can help you when the time comes. ⚖️ Advantage: Solo 401(k) So which account is right for you? The good news is both SEP IRAs and solo 401(k)s offer excellent tax advantages that can help you reach retirement quicker. We offer both at Betterment, and make it easy to open either one. Because when you’re self-employed, you’re busy running your business. Optimizing your retirement savings? Leave that to us for one less hat in your wardrobe.

The pitfalls of comparing portfolio returns How to take stock of your stocks (and bonds)—here, there, everywhere. Investing can feel like a leap of faith. You pick a portfolio. You deposit money. Then, you wait. Trouble is, it takes a while for compound growth to do its thing. Using the Rule of 72 and historical stock returns, it takes roughly a decade for every dollar invested to double. That’s a lot of time for second-guessing. You may peek at your portfolio returns and wonder, “Could I be doing better?” Don’t worry; it’s normal to question whether we’re making the right choices with our money. But comparing different portfolios can be tricky. Variables abound. There’s the composition of the portfolios themselves, but also their fees and tax treatments. So whether you’re sizing us up with rival money managers, or with the stock indexes you see most often in the news, we’re here to help you level set. The ABCs of apples-to-apples comparisons Let’s start with a statistic we’re quite proud of: Since launching in 2011, our 90% stock Core Portfolio has delivered over 9.0% returns*. Those are the returns of real Betterment customers, minus fees, and taking the timing of deposits and withdrawals out of the equation. This helps focus more on the performance of the portfolio itself. *As of 12/31/2024, and inception date 9/7/2011. Composite annual time-weighted returns: 12.7% over 1 year, 7.9% over 5 years, and 7.8% over 10 years. Composite performance calculated based on the dollar-weighted average of actual client time-weighted returns for the Core portfolio at 90/10 allocation, net of fees, includes dividend reinvestment, and excludes the impact of cash flows. Past performance not guaranteed, investing involves risk. So, is 9.0% good? Well, it depends on the comparison. Stock indexes like the S&P 500 and Dow Jones dominate the news, but they’re hardly comprehensive. For one, they exclude bonds, a lower-yield staple of many portfolios. There’s a reason why regardless of the portfolio, we recommend holding at least some bonds. They help temper market volatility and preserve precious capital. Secondly, popular indexes also largely ignore international markets. The S&P, for example, typically represents less than half the value of all investable stocks in the world. Our globally-diversified portfolios, meanwhile, spread things out in service of a smoother investing journey. We're built for the long run, and history has shown that American and International assets take turns outperforming each other every 10-15 years. So the modest amount of international exposure in many of our portfolios means this: you're in a better position to profit when the pendulum swings the other way. Now, taking all of this to heart isn't easy. Not when the S&P returns 20% in a given year. At moments like these, it’s perfectly normal to feel FOMO when looking at the returns of your globally-hedged investing. To keep the faith, it helps to keep the right benchmark(s) in mind. Not all diversification is created equal We’re not alone in offering globally-diversified portfolios. But two portfolios, even with similar stock-to-bond ratios, can take very different paths to the same end goal. Tax optimization, market timing, and fund fees can all impact your investing’s bottom line as well. Some investors compare providers by investing a little with each, waiting a few months, then comparing the balances. This sort of trialing, however, may not tell you much. When it comes to our portfolios, you can find better comparisons in two particular ETFs that seek to track a wide swath of the market: ACWI for stocks and AGG for bonds. See how your Betterment portfolio stacks up against them in the Performance section for any goal or account. Simply scroll down to “Portfolio returns,” click “Add comparison,” and pick from the available allocations of stocks and bonds. We show your “Total return” by default at Betterment, otherwise known as the portfolio’s total growth for a given time period. You can also see this expressed as an “Annualized” return, or the yearly growth rate you often see advertised with other investments. Putting your performance in perspective Comparison may be the thief of joy, but it’s okay, prudent even, to evaluate your investing returns on occasion. Once or twice a year is plenty. The key is to steer clear of common pitfalls along the way. Like comparing your globally-diversified apple to someone else’s all-U.S. orange. Or cherry-picking a small sample size instead of a longer, more-reliable track record. It’s easier said than done. That’s why we bake more relevant comparisons right into the Betterment app. It’s also why we produce content like this. Because if there’s a silver lining to the slow snowballing of compound growth, it’s that you have plenty of time to brush up on the basics.