Are there tax implications for transferring my account?

Your account assets will be transferred to Betterment in-kind, so there will not be any tax implications associated with the account transfer itself. Following the transfer, your Marcus Invest portfolio strategy will be gradually transitioned to a similar Betterment portfolio strategy (described in “Portfolio Comparison”). This update will involve, among other things, account rebalancing, which may result in the realization of taxable gains due to the purchase and sale of securities in taxable accounts.

For tax-advantaged accounts (e.g. IRAs), there will be no tax impact.