In this guide
- Can you have a Roth IRA and a 401(k)? Why the answer is yes
- 2026 limits and phase-outs on one page
- Can you max out a 401(k) and a Roth IRA in the same year?
- The Roth IRA income limit is the real constraint
- Using pre-tax 401(k) deferrals to get under the line
- Three worked examples: $120K, $200K and $260K
- Where the 401(k) does matter: the traditional IRA deduction
- Above the limits: the backdoor route
- Roth IRA and Roth 401(k) at the same time: not the same account
- A funding order many savers use
- Deadlines and mistakes to avoid
Can you have a Roth IRA and a 401(k)? Why the answer is yes
The confusion comes from the traditional IRA. Workplace plan coverage can take away the deduction for a traditional IRA contribution, which many people remember as "if you have a 401(k), you can't do an IRA." A Roth IRA contribution was never deductible, so there is nothing to take away. The eligibility test in IRC §408A(c)(3) looks at one thing: your modified adjusted gross income. Participation in a 401(k), 403(b) or any other employer plan, by you or your spouse, is irrelevant to it.
The two accounts also draw on different limits. Your 401(k) deferrals count against the elective deferral limit in IRC §402(g). Your Roth IRA contribution counts against the IRA limit in IRC §219(b), shared across all your traditional and Roth IRAs. Filling one does not use up the other, a point the IRS makes on its IRA contribution limits page: you can contribute to a traditional or Roth IRA even if you participate in an employer plan.
2026 limits and phase-outs on one page
All figures below are from IRS Notice 2025-67, the official 2026 cost-of-living adjustments, summarized in the IRS announcement. Every income figure is modified AGI.
| 2026 item | Amount or range | Applies to |
|---|---|---|
| 401(k) elective deferral limit (pre-tax and Roth combined) | $24,500 | Per person, across all plans |
| 401(k) catch-up, age 50+ | +$8,000 | Total $32,500 |
| 401(k) catch-up, ages 60–63 | +$11,250 instead of $8,000 | Only if the plan offers it; total $35,750 |
| §415(c) cap on total 401(k) additions | $72,000 | Your deferrals + employer money + after-tax; catch-ups on top |
| IRA limit (traditional and Roth combined) | $7,500 | Also capped at taxable compensation |
| IRA catch-up, age 50+ | +$1,100 | Total $8,600; no special 60–63 amount |
| Roth IRA phase-out, single or head of household | $153,000–$168,000 | Direct contributions only |
| Roth IRA phase-out, married filing jointly | $242,000–$252,000 | Couple's combined MAGI |
| Roth IRA phase-out, married filing separately | $0–$10,000 | If you lived with your spouse during the year |
| Traditional IRA deduction phase-out, covered by a plan | $81,000–$91,000 single; $129,000–$149,000 joint | Contributing spouse is covered |
| Traditional IRA deduction phase-out, spouse covered | $242,000–$252,000 joint | Contributing spouse is not covered |
| Deadline | 401(k): payroll by December 31. IRA: return due date, no extensions | Tell the custodian which year |
The 401(k) has no income test for pre-tax or Roth deferrals. The IRA limit is one aggregate cap across every IRA you own, a rule covered in can you have multiple Roth IRAs.
Can you max out a 401(k) and a Roth IRA in the same year?
Yes. Because the limits stack, the most you can contribute from your own pay in 2026, with a full 401(k) deferral and a full IRA contribution in the same year, depends on your age:
- Under 50: $24,500 + $7,500 = $32,000.
- 50 to 59, or 64 and older: $32,500 + $8,600 = $41,100.
- Turning 60, 61, 62 or 63 in 2026, in a plan that offers the higher catch-up: $35,750 + $8,600 = $44,350.
Employer matching and profit-sharing go on top, up to the $72,000 §415(c) ceiling on total annual additions to your 401(k) account; catch-ups do not count toward that ceiling. If the plan accepts after-tax (non-Roth) contributions, the gap below $72,000 is the room a mega backdoor Roth uses.
Two refinements. The §402(g) limit is per person, not per plan: if you change jobs or have two employers, combined deferrals across all plans cannot exceed $24,500 plus any catch-up. And the IRA limit is capped at taxable compensation, though a couple filing jointly can fund a spousal IRA for a non-earning spouse from the working spouse's pay, so a one-income household can still put $15,000 a year into two IRAs before catch-ups.
The Roth IRA income limit is the real constraint
For high earners, the question is rarely whether a 401(k) blocks a Roth IRA. It is whether income does. The 2026 phase-out ranges under §408A(c)(3), per Notice 2025-67:
| Filing status | Full contribution if MAGI is below | Partial contribution | No direct contribution at or above |
|---|---|---|---|
| Single, head of household | $153,000 | $153,000–$168,000 | $168,000 |
| Married filing jointly, qualifying surviving spouse | $242,000 | $242,000–$252,000 | $252,000 |
| Married filing separately (lived with spouse during the year) | $0 | $0–$10,000 | $10,000 |
Modified AGI here is AGI with a few add-backs, and under §408A(c)(3)(B)(i) it excludes income from Roth conversions, so converting in the same year does not cost you the contribution. Inside the range, the reduction is proportional: divide the amount by which your MAGI exceeds the bottom of the range by the width of the range ($15,000 single, $10,000 joint), multiply by your contribution limit, and subtract. Two rules borrowed from §219(g)(2) then apply: round the allowed amount up to the next $10, and if it is above zero but under $200, you may contribute $200. IRS Publication 590-A, Worksheet 2-2, walks through the same steps.
Worked example, single filer. MAGI of $160,000 is $7,000 into a $15,000 range. $7,000 ÷ $15,000 × $7,500 = $3,500 of reduction, leaving an allowed Roth IRA contribution of $4,000. At age 50 the same arithmetic on $8,600 leaves $4,586.67, which rounds up to $4,590. For a couple filing jointly at $246,000, $4,000 into a $10,000 range, the reduction is $3,000 and each spouse may contribute $4,500. The joint range applies to the couple's combined MAGI; income cannot be allocated between spouses to stay under it.
The married-filing-separately trap. If you file separately and lived with your spouse at any point in the year, your range is $0 to $10,000. Couples who file separately for other reasons, such as income-driven student loan repayment, effectively lose the direct Roth IRA contribution and need the backdoor instead.
Using pre-tax 401(k) deferrals to get under the line
This is where the two accounts do interact, in the saver's favor. Pre-tax 401(k) deferrals are excluded from W-2 taxable wages, so they reduce AGI dollar for dollar, and with it the MAGI used for the Roth IRA test. Roth 401(k) deferrals do not; they stay in taxable wages.
Consider a single filer with $180,000 of salary and no other income. If all 401(k) deferrals are Roth, MAGI is $180,000 and the direct Roth IRA contribution is zero. If the full $24,500 is deferred pre-tax, MAGI drops to $155,500, which is $2,500 into the range. The reduction is $2,500 ÷ $15,000 × $7,500 = $1,250, so the allowed Roth IRA contribution is $6,250. The same move can bring a couple's joint MAGI from just over $252,000 back under $242,000 if both spouses defer pre-tax.
Whether that trade is worth making is a separate question: you give up Roth treatment on $24,500 in the 401(k) to gain it on $6,250 in the IRA, in exchange for a deduction now at your marginal rate; the framework is in pre-tax vs. Roth. Well above the range, the lever cannot close the gap and the backdoor makes the question moot.
Three worked examples: $120K, $200K and $260K
The three cases below assume salary is the only income, no other AGI adjustments, everyone is under 50, and the employer plan is a 401(k). They are illustrative, not a recommendation for anyone's situation.
| 2026 scenario | Direct Roth IRA | Traditional IRA deduction | What the full stack looks like |
|---|---|---|---|
| $120,000, single, covered by a 401(k) | Full $7,500 (MAGI is below $153,000) | None (above $91,000, even after a $24,500 pre-tax deferral brings MAGI to $95,500) | $24,500 to the 401(k) + $7,500 Roth IRA = $32,000 |
| $200,000, single, covered by a 401(k) | None (above $168,000; a $24,500 pre-tax deferral only reaches $175,500) | None | $24,500 to the 401(k) + $7,500 nondeductible IRA converted via the backdoor = $32,000 |
| $260,000, married filing jointly, one spouse covered, the other has no plan | None at $260,000 (above $252,000). If the covered spouse defers $24,500 pre-tax, MAGI is $235,500 and both spouses can contribute the full $7,500 | Covered spouse: none. Uncovered spouse: fully deductible once MAGI is under $242,000, but the $7,500 limit is shared with any Roth contribution | $24,500 to the 401(k) + $7,500 Roth IRA for each spouse = $39,500, directly if MAGI is under $242,000, otherwise by backdoor |
In the $200,000 case, income, not the 401(k), closes the direct Roth IRA and the backdoor reopens it. In the $260,000 case, a single payroll election moves the household from "backdoor only" to direct contributions for both spouses.
Where the 401(k) does matter: the traditional IRA deduction
The workplace plan affects one thing: whether a traditional IRA contribution is deductible. Under IRC §219(g), an "active participant" in an employer plan loses the deduction at much lower incomes than the Roth eligibility test. For a 401(k) or other defined contribution plan, the IRS treats you as covered for a year if any contributions or forfeitures, yours or your employer's, were allocated to your account for the plan year ending with or within your tax year; for a defined benefit pension, being eligible to participate is enough. The "Retirement plan" check in Box 13 of your W-2 is the usual signal. The IRS sets out the test on its coverage page and the ranges on its IRA deduction limits page.
| 2026 situation | Deduction phases out between (MAGI) |
|---|---|
| Single or head of household, covered by a workplace plan | $81,000–$91,000 |
| Married filing jointly, contributing spouse is covered | $129,000–$149,000 |
| Married filing jointly, contributing spouse not covered but other spouse is | $242,000–$252,000 |
| Married filing separately, either spouse covered | $0–$10,000 |
| Neither spouse covered | No phase-out; full deduction at any income |
The spousal row is the one people miss: on a joint return at $200,000, the covered spouse's traditional IRA contribution is nondeductible while the uncovered spouse's is fully deductible. Losing the deduction does not take away the contribution. You can still make a nondeductible traditional IRA contribution up to the limit and report it on Form 8606 to establish basis. On its own it is a weak vehicle, with no deduction going in and ordinary-income tax on earnings coming out; its main use is as the first step of a backdoor Roth.
Above the limits: the backdoor route
If your MAGI is above $168,000 single or $252,000 joint, the standard workaround is the backdoor Roth IRA: make a nondeductible contribution of $7,500 (or $8,600) to a traditional IRA, then convert it to a Roth IRA. Conversions have had no income limit since 2010.
The catch is the pro-rata rule of IRC §408(d)(2). The IRS looks at the combined value of all your traditional, SEP and SIMPLE IRAs at December 31 of the conversion year and treats the conversion as coming proportionally from basis and pre-tax money. With $92,500 of old rollover IRA money plus a $7,500 nondeductible contribution, only 7.5% of any conversion is tax-free. This is the second place a 401(k) helps: 401(k) balances are not counted. If your plan accepts roll-ins, moving pre-tax IRA money into it before year-end can leave the IRA side holding only basis, so the conversion is essentially tax-free. The full sequence, including Form 8606 reporting, is in the backdoor guide.
Roth IRA and Roth 401(k) at the same time: not the same account
You can hold and fund both in the same year; the Roth 401(k) draws on the $24,500 deferral limit and the Roth IRA on the $7,500 IRA limit. But the two are often treated as interchangeable, and they are not. The differences, beyond the plan menu versus an open custodian menu, affect which to fund first.
- Income limit. None for the Roth 401(k). The Roth IRA has the phase-out above.
- Lifetime RMDs. Neither has them now. SECURE 2.0 section 325 removed lifetime RMDs from designated Roth accounts in employer plans starting in 2024.
- Access to contributions. Roth IRA contributions can be withdrawn at any time without tax or penalty, because distributions come out contributions first under §408A(d)(4). A nonqualified Roth 401(k) distribution is instead split pro rata between contributions and earnings under Treas. Reg. §1.402A-1, Q&A-3, so part of it can be taxable.
- Five-year clocks. Each Roth 401(k) runs its own clock, separate from your Roth IRA's. When you roll a Roth 401(k) into a Roth IRA, the Roth IRA's clock governs, which is a reason to open a Roth IRA early even with a small contribution. See the Roth IRA 5-year rule.
- Employer money. Matching contributions traditionally go in pre-tax. SECURE 2.0 section 604 lets plans offer Roth employer contributions at the employee's election; under IRS Notice 2024-2 they must be fully vested, are included in your income for the year they are allocated, and are reported on Form 1099-R. Whether your plan offers them is a plan-design question.
When you leave an employer, the choice between leaving money in the plan, rolling it to an IRA, or converting pre-tax money to Roth on the way out is covered in 401(k) to Roth IRA.
A funding order many savers use
There is no single correct order; the right one depends on tax rates, cash needs and plan features. As a description of common practice, not a recommendation for any individual, many planners sequence contributions this way:
- 401(k) up to the full employer match. The match is an immediate return that no IRA offers.
- Health savings account, if you are enrolled in a high-deductible health plan. Contributions are deductible, growth is untaxed, and withdrawals for qualified medical costs are tax-free. The 2026 limits are $4,400 self-only and $8,750 family under Rev. Proc. 2025-19, plus $1,000 at 55 or older.
- Roth IRA, directly or by backdoor. More flexible access to contributions and a broader investment choice than most plans.
- The rest of the 401(k) deferral limit, pre-tax or Roth based on expected rates. One constraint: under §414(v)(7), added by SECURE 2.0, catch-up contributions by participants whose prior-year FICA wages from the employer exceeded a threshold ($150,000 of 2025 wages for 2026, per Notice 2025-67) must be Roth. The IRS's administrative transition period ended December 31, 2025; the September 2025 final regulations formally apply to taxable years beginning after December 31, 2026, with plans permitted to use a reasonable, good-faith reading of the statute for 2026. Details are in the mandatory Roth catch-up rule.
- After-tax 401(k) contributions with in-plan conversion or in-service rollover, where the plan allows a mega backdoor.
- Taxable investing for anything beyond that.
Readers with very high current rates and an expected lower rate in retirement often fill pre-tax first and convert in low-income years later; see the Roth conversion guide and the calculators.
Deadlines and mistakes to avoid
Deadlines differ. 401(k) deferrals must come out of pay during the calendar year. IRA contributions for 2026 can be made until the original due date of your 2026 return, generally April 15, 2027, and extensions do not extend it. When contributing between January 1 and the deadline, tell the custodian which year the contribution is for.
Contributing before you know your MAGI. High earners with bonuses, K-1 income or capital gains often do not know their final MAGI until spring. A direct Roth IRA contribution that proves to be over the limit is an excess contribution, subject to a 6% excise tax under IRC §4973 for each year it stays in the account. It can be fixed by withdrawing it with its earnings by the return due date including extensions, or by recharacterizing it as a traditional IRA contribution; the mechanics are in excess Roth IRA contributions. If your income is anywhere near the range, the backdoor removes the guesswork.
Over-deferring after a job change. Your new employer's payroll does not know what your old one withheld. Exceeding $24,500 across both plans creates an excess deferral under §402(g)(2). The excess is included in your income for the year of the deferral regardless; if it is not distributed with its earnings by April 15 of the following year, it is taxed again when eventually paid out.
Forgetting the IRA side of the pro-rata rule. A SEP IRA from a side business or an old rollover IRA counts in the December 31 balance. Related guides are in our Learn hub.