Ask an Advisor: With $2M in Our 401(k)s at 55, Should We Switch to Roth Contributions?

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Ask an Advisor: We're in Our Mid-50s and Have $2 Million in Our 401(k)s. Should We Pivot to Roth Contributions? — Ask an Advisor: We’re in Our Mid-50s and Have $2 Million in Our 401(k)s. Should We Pivot to Roth Contributions?

We are a dual-income couple in our mid-50s with over $2 million in our 401(k)s. Should we “sacrifice” the pre-tax benefit and switch to Roth contributions at work?

-Wendy

Like most tax-related questions, the answer is “it depends.” Based on your situation, switching contributions to a Roth 401(k) could make sense for a few key reasons, including tax diversity and tax-free growth. However, there may be additional factors that make sticking with a traditional 401(k) and opening a Roth IRA on the side more desirable. You’ll also want to consider the pay now vs. pay later tax impact of your choice. A lot of factors and assumptions (like future tax rates) go into these calculations, but it’s worth trying to figure out which path will save you the most in taxes over your lifetime.

There’s no straightforward one-size-fits-all answer for this, so it makes the most sense to discuss this with a financial advisor or tax pro. They’ll have advanced modeling programs that can help you see the different tax implications of sticking with a traditional 401(k) or switching to a Roth account. (And if you’re interested in working with a financial advisor, this tool can help you match with one.)

What Is a Roth 401(k)?

More employers than ever are offering Roth 401(k) plans as part of their benefits packages. These hybrid accounts combine features of traditional 401(k) plans and Roth IRAs, giving you a workplace retirement option with special tax-free growth features. However, these plans haven’t quite caught on yet. Most of the money in employee retirement accounts sits in traditional 401(k)s, mostly because people generally prefer the “pay less tax right now” model.

Unlike a regular 401(k), contributions to a Roth 401(k) won’t lower your current tax bill. These contributions are made with after-tax dollars, so you pay taxes upfront in exchange for a huge benefit down the road. The trade-off is tax-free growth, meaning if you follow all the rules you won’t have to pay any tax on the earnings inside the account when you withdraw them.

Moving all or a portion of your contributions to a Roth 401(k) gives you greater tax diversity. If you opt for a hybrid approach, some of your money will be taxable when you withdraw it (traditional), while some will be tax-free (Roth). That gives you more flexibility with future tax planning, another key benefit. (A financial advisor can help you determine whether a Roth 401(k) is right for you.)

Pros and Cons of a Roth 401(k)

Roth 401(k)s come with benefits and drawbacks, just like any other type of retirement account. For most people, the pros outnumber the cons. But the most significant drawback – a bigger tax bill today – could outweigh those benefits.

First, let’s look at the benefits of Roth 401(k) plans:

Tax-free earnings growth (in most cases)
No required minimum distributions (RMDs) from Roth 401(k)s for people turning 73 after Dec. 31, 2023, thanks to the SECURE 2.0 Act
No income restrictions for contributing to a Roth 401(k)
Tax-free distributions on the money you withdraw properly from your Roth 401(k)
Lower adjusted gross income (AGI) in the future, which can increase your eligibility for things like tax-free Social Security benefits

Now for the drawbacks:

Here’s one tricky feature that could go either way: Matching contributions for Roth 401(k)s have historically been made on a pre-tax basis. In that case, you don’t pay any current income taxes on the match, but you would be taxed on that money and any earnings when you withdraw it in the future. However, SECURE 2.0 Act gives employers a new option to put those matching contributions into the Roth 401(k) account, simplifying finances for their employees. Check with your employer to see how they handle Roth 401(k) matches. (And if you need help planning for retirement, this tool can help you match with a financial advisor.)

Roth 401(k) vs. Traditional 401(k)

Now that you understand the pros and cons of Roth 401(k)s, let’s look at how they compare to traditional 401(k) accounts.

The main difference between the two is tax timing. With a traditional 401(k) plan, you contribute pre-tax dollars so the money you put in doesn’t count as taxable income now. You’ll pay income taxes when you take the money out. With a Roth 401(k), you contribute post-tax dollars and the money you put in counts as current taxable income. When you withdraw those contributions and their related earnings, they won’t be included in your income and you won’t pay tax on them (if the money is withdrawn properly).

Early withdrawals are also treated differently. With a traditional 401(k), distributions taken before age 59 ½ may trigger 10% early withdrawal penalties on the full amount. With a Roth 401(k), withdrawals are pro-rated to include contributions and earnings, and that 10% penalty gets applied only to the earnings portion.

Another important difference: RMDs. Both types require RMDs right now, but that’s about to change. You must take RMDs from traditional 401(k) accounts once you reach age 73. But starting in 2024, people turning 73 after Dec. 31, 2023, will not have to take RMDs from Roth 401(k)s. (And if you need help planning for RMDs, consider working with a financial advisor.)

Roth 401(k) vs. Roth IRA

While they share some important similarities, Roth IRAs and Roth 401(k)s have some equally important differences.

Roth IRAs have strict income limits, which prevent many people from contributing. For 2025, individuals who earn more than $165,000 or couples earning more than $246,000 can’t contribute to Roth IRAs. Anyone can contribute to a Roth 401(k) regardless of income.

Roth IRAs also have significantly lower contribution limits. The maximum contribution for 2025 is just $7,000 or $8,000 if you’re 50 or older. The maximum contribution for a Roth 401(k) is $23,500 or $31,000 if you’re 50 or older. Plus, Roth 401(k)s have the potential for employer matches which are not available for Roth IRAs. (And if you need help picking between retirement accounts, consider speaking with a financial advisor.)

Next Steps

There’s a lot to consider when choosing between traditional and Roth 401(k) accounts. To make the best possible decision based on your unique financial situation, talk to your financial advisor or tax professional.

Tips for Finding a Financial Advisor

If you have questions specific to your gifting and tax situation, a financial advisor can help. Finding a financial advisor doesn’t have to be hard. SmartAsset’s free tool matches you with vetted financial advisors who serve your area, and you can interview your advisor matches at no cost to decide which one is right for you. If you’re ready to find an advisor who can help you achieve your financial goals, get started now. You can also check out SmartAsset reviews.
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Michele Cagan, CPA, is a SmartAsset financial planning columnist and answers reader questions on personal finance and tax topics. Got a question you’d like answered? Email AskAnAdvisor@smartasset.com and your question may be answered in a future column.

Please note that Michele is not a participant in the SmartAsset AMP platform, nor is he an employee of SmartAsset, and she has been compensated for this article.

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