Can You Contribute to Both a Roth IRA and 401(k)?

Yes, you can contribute to both a Roth IRA and a 401(k) in the same year. The two accounts have separate contribution limits set by the IRS, and maxing out one has no effect on how much you can put into the other. For 2026, that means up to $24,500 in your 401(k) and up to $7,500 in a Roth IRA, for a combined $32,000 before any catch-up contributions.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 The catch is that Roth IRA eligibility phases out at higher incomes, while the 401(k) has no income cap at all.

How Much You Can Put Into Each Account

The 2026 limits break out like this:

Employer matching or profit-sharing dollars sit on top of your $24,500 employee limit. The total of all contributions to your 401(k) from every source, meaning your deferrals plus any employer match and after-tax contributions, cannot exceed $72,000 in 2026.4Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs Most workers never approach that ceiling, but it can matter with a generous match or after-tax contributions.

Catch-Up Contributions at 50 and Older

If you are 50 or older, both accounts give you additional room in 2026:

Combined, that puts a saver 50 or older at $41,100 across both accounts. A separate SECURE 2.0 change gives workers aged 60 through 63 an enhanced 401(k) catch-up of $11,250 instead of the standard $8,000, which raises their combined potential to $44,350.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 At age 64 you drop back to the $8,000 catch-up.

Roth IRA Income Limits

This is the one place the two accounts do not act independently of each other. A 401(k) has no income cap. You could earn half a million dollars and still contribute the full amount through payroll. A Roth IRA phases out your allowed contribution as your income climbs, and shuts it off entirely above a threshold.

The IRS uses Modified Adjusted Gross Income (MAGI) to decide where you land. MAGI starts with your adjusted gross income and adds back items like the student loan interest deduction and the foreign earned income exclusion.5Internal Revenue Service. Modified Adjusted Gross Income The 2026 phase-out ranges are:

Inside the phase-out range you can only contribute a reduced amount. Publication 590-A has a worksheet for the exact figure.6Internal Revenue Service. Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs) If your income turns out higher than you expected and you overcontribute, the IRS charges a 6% excise tax on the excess for every year it stays in the account.7Internal Revenue Service. Excess IRA Contributions Pulling the excess out along with any earnings before your tax-filing deadline (including extensions) avoids the penalty.

The Roth 401(k) Alternative

Many employers now offer a Roth 401(k) alongside the traditional pre-tax version. A Roth 401(k) has no income limit, so you can fund it no matter what you earn.8Internal Revenue Service. Roth Comparison Chart Contributions go in after-tax with no upfront deduction, and qualified withdrawals in retirement come out tax-free.

The Roth 401(k) shares the $24,500 employee limit with the traditional 401(k), and the two flavors share that cap between them. Put $15,000 in the Roth side and you have $9,500 left for the pre-tax side. You can still contribute a full $7,500 to a Roth IRA on top of that, assuming your income clears the Roth IRA limits. High earners who cannot contribute directly to a Roth IRA often lean on the Roth 401(k) for their after-tax retirement savings.

Roth 401(k) accounts no longer require minimum distributions during the owner’s lifetime, matching the long-standing treatment of Roth IRAs.9Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs)

The Backdoor Roth for High Earners

If your income sits above the Roth IRA phase-out, a backdoor Roth IRA is a way in. You make a nondeductible contribution to a traditional IRA, then convert that money to a Roth IRA. Traditional IRA contributions have no income limit (only the deduction does), and Roth conversions have no income limit either, so the two steps together work at any income.

The trap: if you hold any pre-tax money in any traditional, SEP, or SIMPLE IRA, the IRS treats all your IRA balances as one pool at conversion. You cannot convert only the after-tax dollars. The taxable share of the conversion is calculated proportionally across all your pre-tax and after-tax IRA balances.6Internal Revenue Service. Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs) Someone with $95,000 of pre-tax IRA money and a $5,000 nondeductible contribution would owe tax on 95% of whatever they convert. If your employer’s plan accepts rollovers, moving pre-tax IRA balances into the 401(k) before converting empties the traditional IRA of pre-tax money and lets the nondeductible contribution convert cleanly. File Form 8606 for any year you make nondeductible traditional IRA contributions or do a Roth conversion. Skipping it risks a $50 penalty and, worse, losing track of your after-tax basis and paying tax on the same money twice.10Internal Revenue Service. Instructions for Form 8606

Different Deadlines for the Two Accounts

The deadlines are not the same, and mixing them up can cost you a year of contributions.

Your 401(k) contributions must come out of paychecks issued during the calendar year. To max out 2026, every dollar has to be withheld from paychecks paid between January 1 and December 31, 2026. Once the year ends, you cannot go back and add more. If you start late, check whether your plan lets you raise your deferral percentage enough to catch up over the remaining pay periods.

Roth IRA contributions run on the tax calendar instead. You have until the tax-filing deadline of the following year to fund the account for the prior year, so 2026 Roth IRA contributions can be made until April 15, 2027.11Internal Revenue Service. IRA Year-End Reminders That extra window is useful when you are not sure whether your income will land inside the phase-out range. Wait until the picture is clearer, then contribute.

Why Running Both Accounts Is Worth the Effort

The bigger combined savings ceiling is only part of the reason to use both. The other is tax diversification. A traditional 401(k) lowers your taxable income now, which is valuable if you are in a higher bracket today. Roth IRA money has already been taxed, so it gives you a pool of retirement income that will not push you into a higher bracket or increase the tax on your Social Security benefits.

Nobody knows what tax rates will look like in 20 or 30 years. Splitting contributions between pre-tax and after-tax accounts hedges against that uncertainty. In a year when you need $80,000 for retirement expenses, you could pull $50,000 from the 401(k) (taxable) and $30,000 from the Roth IRA (tax-free), keeping your taxable income lower than if everything came from one bucket. Roth IRAs have no required minimum distributions during your lifetime, so money you do not need can keep growing.9Internal Revenue Service. Retirement Topics – Required Minimum Distributions (RMDs) Traditional 401(k) balances force taxable distributions starting at age 73, whether you need the money or not.