What is a 401(k) QDIA?

What is a QDIA?

A 401(k) Qualified Default Investment Alternative (QDIA) is the investment used when an employee contributes to the plan without having specified how the money should be invested. As a "safe harbor," a QDIA protects plan fiduciaries from liability for the default investment's performance, including losses. Important caveat: that relief covers investment outcomes only. Fiduciaries remain responsible for prudently selecting the QDIA in the first place and monitoring it over time.

Here’s how it works: When money is contributed to the plan, it’s automatically invested in the QDIA that was selected by the plan fiduciary (typically, the business owner or the plan sponsor). The employee can leave the money in the QDIA or transfer it to another plan investment.

The concept of a QDIA was first introduced when the Pension Protection Act of 2006 (PPA) was signed into law. Designed to boost employee retirement savings, the PPA removed barriers that prevented employers from adopting automatic enrollment. At the time, fears about legal liability for market fluctuations and the applicability of state wage withholding laws had prevented many employers from adopting automatic enrollment—or had led them to select low-risk, low-return options as default investments.

The PPA eliminated those fears by amending the Employee Retirement Income Security Act (ERISA) to provide a safe harbor for plan fiduciaries who invest participant assets in certain types of default investment alternatives when participants do not give investment direction. To assist employers in selecting QDIAs that met employees’ long-term retirement needs, the Department of Labor (DOL) issued a final regulation detailing the characteristics of these investments. Learn more about what kinds of investments qualify as QDIAs below.

When a 401(k) plan has a QDIA that meets the DOL's rules, the plan fiduciary isn't liable for the QDIA's investment performance. Without a QDIA, the plan fiduciary is potentially liable for investment losses when participants don't actively direct their plan investments.

That protection isn't unconditional, though. As the DOL puts it, the regulation "does not absolve fiduciaries of the duty to prudently select and monitor QDIAs." In other words, the safe harbor covers how the investment performs—not how you chose it. You still need a documented, prudent process for selecting your plan's default and reviewing it on an ongoing basis.

Plus, having a QDIA in place means that employee accounts are well positioned—even if an active investment decision is never taken. If you select an appropriate default investment for your plan, you can feel confident knowing that your employees’ retirement dollars are invested in a vehicle that offers the potential for growth.

For most plans, a QDIA is now effectively required. For everyone else, it's still a smart idea.

Under SECURE 2.0, most 401(k) and 403(b) plans established on or after December 29, 2022 are required to include an eligible automatic contribution arrangement since 2025. Automatic enrollment means money will be contributed for participants who haven't made an investment election, so these plans need a QDIA. Several categories of plans are exempt from the mandate: Employers with fewer than 10 employees, businesses less than three years old, SIMPLE 401(k) plans, church plans, and governmental plans. If your plan is subject to the mandate, plan document amendments are due by December 31, 2026.

Even if your plan is exempt from the mandate or predates it, a QDIA could still be a good idea. That's because money can land in a participant's account before they've designated where they want to invest it—and it has to go somewhere. A QDIA answers that question in advance, so those dollars go straight into an investment built for long-term retirement saving.

Yes, the DOL details several conditions plan sponsors must follow in order to obtain safe harbor relief from fiduciary liability for investment outcomes, including:

• A notice generally must be provided to participants and beneficiaries in advance of their first QDIA investment, and then on an annual basis after that
• Information about the QDIA must be provided to participants and beneficiaries which must include the following:
• An explanation of the employee’s rights under the plan to designate how the contributions will be invested;
• An explanation of how assets will be invested if no action taken regarding investment election;
• Description of the actual QDIA, which includes the investment objectives, characteristics of risk and return, and any fees and expenses involved
• Participants and beneficiaries must have the opportunity to direct investments out of a QDIA as frequently as other plan investments, but at least quarterly

For more information, consult the DOL fact sheet.

The DOL regulations don’t identify specific investment products. Instead, they describe mechanisms for investing participant contributions in a way that meets long-term retirement saving needs. Specifically, there are four types of QDIAs:

1. An investment service that allocates contributions among existing plan options to provide an asset mix that takes into account the individual’s age or retirement date (for example, a professionally managed account like the one offered by Betterment)
2. A product with a mix of investments that takes into account the individual’s age or retirement date (for example, a life-cycle or target-date fund)
3. A product with a mix of investments that takes into account the characteristics of the group of employees as a whole, rather than each individual (for example, a balanced fund)

The fourth type of QDIA is a capital preservation product, such as a stable value fund, that can only be used for the first 120 days of participation. This may be an option for Eligible Automatic Contribution Arrangement (EACA) plans that allow withdrawals of unintended deferrals within the first 90 days without penalty. We’re excluding further discussion of this option here since plans must still have one of the other QDIAs in cases where the participant takes no action within the first 120 days.

In September 2025, the DOL issued confirmed that an investment management service can serve as a QDIA even when it incorporates a guaranteed lifetime income product, provided it still satisfies the QDIA regulation's transferability and other conditions. If you're evaluating retirement income options for your plan, that guidance is a useful starting point.

Let’s breakdown each of the first three QDIAs:

1. An investment service that allocates contributions among existing plan options to provide an asset mix that takes into account the individual’s age or retirement date

Of the three options, a managed account can take the most information about an individual into account. This is the QDIA provided as part of Betterment 401(k)s.

Betterment factors in more than just age (or years to retirement) when assigning participants their particular stock-to-bond ratio within our Core portfolios. We utilize specific data including salary, balance, state of residence, plan rules, and more.

And while managed accounts can cost more, they don’t have to be. Betterment’s solution, which is relatively lower in cost due to investing in exchange traded funds (ETFs) portfolios, offers personalized advice and an easy-to-use platform that can also take external and spousal/partner accounts into consideration.

2. A product with a mix of investments that takes into account the individual’s age or retirement date

When QDIAs were introduced in 2006, target date funds were the preferred default investment. The concept is simple: pick the target date fund with the year that most closely matches the year the investor plans to retire. For example, in 2020 if the investor is 45 and retirement is 20 years away, the 2040 Target Date Fund would be selected. As the investor moves closer to their retirement date, the fund adjusts its asset mix to become more conservative.

One common criticism of target date funds today is that the personalization ends there. Target date funds are too simple and their one-size-fits-all portfolio allocations do not serve any individual investor very well. Plus, target date funds are often far more expensive compared to other alternatives. Finally, most target date funds are composed of investments from the same company—and very few fund companies excel at investing across every sector and asset class. Many experts view target date funds as outdated QDIAs and less desirable than managed accounts.

3. A product with a mix of investments that takes into account the characteristics of the group of employees as a whole 

This kind of product—for example, a balanced fund—offers a mix of equity and fixed-income investments. However, it’s based on group demographics and not on the retirement needs of individual participants. Therefore, using a balanced fund as a QDIA is a blunt instrument that by definition will have an investment mix that is either too heavily weighted to one asset class or another for most participants in your plan.

Betterment provides tailored allocation advice based on what each individual investor needs. That means greater personalization—and potentially greater investment results—for your employees.

At Betterment, we monitor plan participants’ investing progress to make sure they’re on track to reach their goals. When they’re not on target, we provide actionable advice to help get them back on track. As a 3(38) investment manager, we assume full responsibility for selecting and monitoring plan investments—including your QDIA. That means fiduciary relief for you and better results for your employees.

The exchange-traded fund (ETF) difference

Another key component that sets Betterment apart from the competition is our exclusive use of ETFs. Here's why we use them:

1. Low cost—ETFs generally cost less than mutual funds, which means more money stays invested.
2. Diversified—All of the portfolios used by Betterment are designed with diversification in mind, so that investors are not overly exposed to individual stocks, bonds, sectors, or countries—which may mean better returns in the long run.
3. Efficient—ETFs take advantage of decades of technological advances in buying, selling, and pricing securities.

Helping your employees live better

Our mission is simple: to empower people to do what’s best for their money so they can live better. Betterment’s suite of financial wellness solutions, from our QDIAs to our user-friendly investment platform, is designed to give your employees a more personalized experience. We invite you to learn more about what we can do for you.