Yes, you can contribute to both a Roth IRA and a 401(k) in the same year, and the two limits sit in completely separate buckets. For 2026, that means up to $24,500 of elective deferrals into a 401(k) and up to $7,500 into a Roth IRA, for a combined $32,000 before any age-based catch-up contributions.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Income limits apply on the Roth side, and older workers get additional room.
Why the Two Limits Don’t Interact
The IRS treats your 401(k) and your Roth IRA as entirely separate accounts. Maxing one has zero effect on the other. You can defer the full $24,500 into your 401(k) through payroll and still contribute the full $7,500 to a Roth IRA, provided you meet the Roth’s income rules.2Internal Revenue Service. Retirement Plans FAQs on Designated Roth Accounts The two caps live in different sections of the tax code and have never been aggregated.
Funding both in the same year also gives you a mix of pre-tax and after-tax retirement money. Traditional 401(k) deferrals cut your taxable income now and get taxed when you withdraw. Roth IRA contributions use after-tax dollars, and qualified withdrawals come out tax-free. Splitting your savings across both means you have some control in retirement over how much taxable income you pull in a given year.
2026 Contribution Limits for Each Account
401(k)
The standard elective deferral limit is $24,500 for 2026.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 That cap covers your combined pre-tax and Roth 401(k) deferrals with a single employer. If your plan offers both flavors, every dollar into either counts against the same $24,500 ceiling.
Workers age 50 and older can add a catch-up contribution of $8,000, for a total of $32,500. Under the SECURE 2.0 Act, workers who are 60, 61, 62, or 63 during the calendar year get an enhanced catch-up of $11,250 instead of $8,000, taking the possible deferral to $35,750.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Once you turn 64, you drop back to the standard $8,000 catch-up.
Roth IRA
The annual Roth IRA limit for 2026 is $7,500. Age 50 and older adds another $1,100, bringing the maximum to $8,600.3Internal Revenue Service. Retirement Topics – IRA Contribution Limits That $7,500 cap is shared across all your traditional and Roth IRAs combined. Put $3,000 into a traditional IRA and only $4,500 remains for your Roth IRA that year.
Income Limits That Can Shrink or Block Your Roth Contribution
A 401(k) has no income cap for participation. A Roth IRA does, and it uses modified adjusted gross income (MAGI). For 2026:4Internal Revenue Service. 2026 Amounts Relating to Retirement Plans and IRAs
- Single or head of household: full contribution below $153,000 MAGI, reduced between $153,000 and $168,000, none above $168,000.
- Married filing jointly: full contribution below $242,000, reduced between $242,000 and $252,000, none above $252,000.
- Married filing separately, if you lived with your spouse at any point during the year: phase-out runs from $0 to $10,000, so almost anyone in this status is blocked from a direct contribution.
If your income lands inside a phase-out range, the worksheet in IRS Publication 590-A calculates your reduced limit.5Internal Revenue Service. Publication 590-A, Contributions to Individual Retirement Arrangements (IRAs)
If You Earn Too Much for a Direct Roth Contribution
Being over the income cap doesn’t necessarily end the conversation. The tax code puts an income limit on direct Roth contributions but not on Roth conversions.6Office of the Law Revision Counsel. 26 USC 408A – Roth IRAs The strategy commonly called the backdoor Roth uses that gap: you contribute up to $7,500 (or $8,600 at 50+) to a traditional IRA on a nondeductible basis, then convert those funds to a Roth IRA. Report both steps on Form 8606.7Internal Revenue Service. Instructions for Form 8606
One warning before you try it. If you already hold pre-tax money in any traditional, SEP, or SIMPLE IRA, the pro-rata rule treats every dollar across all your traditional IRAs as a single pool and taxes your conversion proportionally, using your December 31 balance. With $92,500 of pre-tax IRA money and a $7,500 nondeductible contribution, only 7.5% of a conversion comes out tax-free. The clean backdoor Roth works best when your pre-tax IRA balance is zero, which sometimes means rolling that money into your employer’s 401(k) first, since 401(k) balances stay out of the pro-rata calculation.
You Need Earned Income to Contribute
Every dollar you put into a 401(k) or Roth IRA has to be backed by earned income in the same tax year. If you earned $5,000, that’s your combined ceiling, no matter what the published limits say.3Internal Revenue Service. Retirement Topics – IRA Contribution Limits Wages, salaries, self-employment income, and combat pay count. Investment income, rental income, and pension payments do not.
Married couples filing jointly get an exception. A non-working spouse can fund their own IRA using the working spouse’s income, up to $7,500 (or $8,600 at 50+), as long as the couple’s combined IRA contributions do not exceed the total taxable compensation on the joint return.3Internal Revenue Service. Retirement Topics – IRA Contribution Limits
The Deadlines Are Different
401(k) money comes out of your paycheck, so it has to be withheld from pay received by December 31. You can’t make a retroactive 401(k) contribution after year-end. Realizing in November you’re behind means bumping up your deferral percentage on your remaining paychecks and nothing else.
Roth IRA contributions are more forgiving. You have until the tax filing deadline, not including extensions, to contribute for the prior year.8Internal Revenue Service. Traditional and Roth IRAs For tax year 2026, that means April 15, 2027. When you contribute between January and April, tell your IRA provider which tax year you want it applied to.
What Happens If You Contribute Too Much
The correction rules differ between the two accounts.
For a 401(k), excess deferrals (which most often happen when you switch jobs mid-year and contribute to two plans) have to be distributed to you by April 15 of the following year. Fix it on time and the excess is taxed once, in the year you contributed it. Miss the April 15 deadline and the excess is taxed twice: once when contributed and again when eventually withdrawn from the plan. Filing a tax extension does not extend this April 15 correction deadline.9Internal Revenue Service. Consequences to a Participant Who Makes Excess Deferrals to a 401(k) Plan If you contributed to two employers’ plans, tell at least one administrator by early March so they have time to process the corrective distribution.
For a Roth IRA, an excess contribution triggers a 6% excise tax on the overage every year it stays in the account.10Office of the Law Revision Counsel. 26 USC 4973 – Tax on Excess Contributions to Certain Tax-Favored Accounts and Annuities Withdraw the excess and any earnings before your tax filing deadline, or absorb it by contributing less in a future year. The 6% keeps accruing annually until you fix it.
A Practical Order for Funding Both
The combined room is substantial when you use both. A worker under 50 can shelter $32,000 across a 401(k) and Roth IRA in 2026. Age 50 to 59 reaches $41,100. Ages 60 through 63 can set aside up to $44,350 thanks to the enhanced catch-up.1Internal Revenue Service. 401(k) Limit Increases to $24,500 for 2026, IRA Limit Increases to $7,500 Employer matching sits on top of your own deferrals, so the total flowing into tax-advantaged accounts can run higher.
For most workers, the usable order is: contribute enough to the 401(k) to capture the full employer match, then fund the Roth IRA to its limit, then return to the 401(k) with whatever you can still save.