Yes, you can have both a 401(k) and a Roth IRA, and you can contribute to both in the same year. Federal tax law treats them as separate accounts with separate limits, and the IRS confirms that participating in an employer retirement plan does not block you from also funding a Roth IRA.1Internal Revenue Service. Retirement Topics – IRA Contribution Limits The catch is on the Roth side: your income has to fall below a threshold to contribute directly. Your 401(k) has no such gate.
How Much You Can Put Into Each in 2026
The two accounts have their own ceilings, and filling one does nothing to the other. For 2026, the employee deferral limit for a 401(k) is $24,500. If you’re 50 or older, you can add an $8,000 catch-up, bringing your personal deferral ceiling to $32,500.2Internal Revenue Service. Retirement Topics – 401(k) and Profit-Sharing Plan Contribution Limits
A SECURE 2.0 provision creates a higher catch-up for a narrow age band. If you turn 60, 61, 62, or 63 at any point during 2026, your catch-up allowance is $11,250 rather than $8,000, for a maximum personal deferral of $35,750.2Internal Revenue Service. Retirement Topics – 401(k) and Profit-Sharing Plan Contribution Limits
Employer matching contributions don’t count against your $24,500 deferral limit. They fall under a separate combined cap that covers your deferrals, the match, and any employer profit-sharing together. For 2026, that combined ceiling under Section 415(c) is $72,000, not counting catch-ups.3Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs (Notice 2025-67) Most workers never approach it.
The 2026 Roth IRA contribution limit is $7,500, plus a $1,100 catch-up at age 50 or older, for a total of $8,600.4Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 That figure covers all your traditional and Roth IRAs combined; you can’t put $7,500 in each.1Internal Revenue Service. Retirement Topics – IRA Contribution Limits
Stack the two accounts and a worker under 50 can shelter $32,000 in personal contributions for 2026 before any employer match or catch-up enters the picture.
The Roth IRA Income Test
Whether you can contribute directly to a Roth IRA depends on your Modified Adjusted Gross Income and your filing status. Your 401(k) has no income restrictions of this kind. For 2026:4Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500
- Single or head of household: full contribution below $153,000 MAGI, reduced contribution between $153,000 and $168,000, none at $168,000 or above.
- Married filing jointly: full contribution below $242,000, reduced between $242,000 and $252,000, none at $252,000 or above.
- Married filing separately: the phase-out runs from $0 to $10,000 and is not inflation-adjusted, which shuts most separate filers out.
Inside the phase-out range, your allowable contribution is reduced proportionally. Above the top of the range, direct Roth IRA contributions are off the table.
Contributing when you’re over the limit triggers a 6% excise tax on the excess for every year it sits in the account.5Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities You can undo the mistake by pulling the excess plus its earnings out before your tax filing deadline. Leave it, and the penalty repeats annually.
If Your Income Is Too High: The Backdoor Roth
Earning too much for a direct Roth IRA contribution doesn’t necessarily lock you out. The backdoor Roth strategy is a legal two-step: contribute to a traditional IRA (there’s no income limit on making a nondeductible traditional IRA contribution), then convert that balance to a Roth IRA. The conversion itself carries no income cap. If you convert soon after contributing after-tax dollars, before the money has earned much, the tax on the conversion is minimal.
You have to file Form 8606 for any year you make nondeductible traditional IRA contributions or convert to a Roth. The form tracks your after-tax basis so the same dollars aren’t taxed twice.6Internal Revenue Service. Instructions for Form 8606
The pitfall is the pro-rata rule. If you hold other pre-tax traditional IRA money (from deductible contributions or rollovers), the IRS treats every converted dollar as a proportional mix of pre-tax and after-tax funds based on your total traditional IRA balance.7Internal Revenue Service. Publication 590-B – Distributions from Individual Retirement Arrangements With $50,000 of pre-tax IRA money and a $7,500 after-tax contribution, most of what you convert becomes taxable. The clean version of a backdoor Roth starts with a traditional IRA balance of zero. A common workaround is rolling existing traditional IRA money into your 401(k), if your plan accepts incoming rollovers, which removes it from the pro-rata calculation.
The Roth 401(k) Alternative
Many employers now offer a designated Roth option inside the 401(k) plan. Contributions come from after-tax dollars like a Roth IRA, but the contribution limits follow 401(k) rules ($24,500 for 2026), and there’s no income cutoff to participate.8Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts A high earner locked out of a direct Roth IRA can still make the full Roth 401(k) deferral.
You can split your 401(k) deferrals between traditional and Roth within the same plan, as long as the combined amount stays within the annual limit.9Internal Revenue Service. Roth Comparison Chart Employer matching contributions still go into the pre-tax side of the plan regardless of how you designate your own money.
Why Fund Both
The point of holding both a 401(k) and a Roth IRA is tax diversification. A traditional 401(k) reduces your taxable income now; every dollar you defer comes off the top of your paycheck before federal income tax, and every dollar you withdraw in retirement is taxed as ordinary income. A Roth IRA works in reverse. You pay tax now, and qualified withdrawals in retirement (including all the growth) are tax-free.
Holding both gives you a lever in retirement. You can pull from the 401(k) up to the edge of a lower bracket and take the rest from the Roth IRA without adding to taxable income. Nobody knows what tax rates will look like in 20 or 30 years, and mixing the two account types hedges that.
There’s a practical order-of-operations point too. If your employer offers a 401(k) match, contributing enough to capture the full match before you fund a Roth IRA is one of the highest-return moves available. Skipping the match to fund a Roth IRA first costs real money over a career.
Different Deadlines for Each Account
The two accounts run on different calendars. Your 401(k) contributions must go in through payroll deductions during the calendar year. Once December 31 passes, you can’t add more to the 401(k) for that tax year, so any change to your deferral percentage has to be filed early enough for the withholding to process before year-end.
Roth IRA contributions are more forgiving. You have from January 1 of the tax year through the following April tax filing deadline. A 2026 Roth IRA contribution can be made anytime between January 1, 2026, and April 15, 2027.1Internal Revenue Service. Retirement Topics – IRA Contribution Limits Filing a tax extension does not extend this deadline; April 15 holds.
That extra window is useful if your income is near the phase-out range. You can wait until early the next year, confirm your MAGI, and then make the Roth IRA contribution knowing you’re inside the limit.