401(k) vs Roth IRA: which should you max out first in 2026?

By FreeToolPark TeamUpdated April 23, 2026

11 min read

On this page

The order of operations
How the tax math works
2026 contribution limits
Roth IRA income limits + backdoor
Scenario: $85k salary
Scenario: $240k combined
When Roth beats traditional
When traditional beats Roth
Roth 401(k) vs Roth IRA
Mega backdoor Roth
State tax considerations
If you can't max both
Decision framework
What to do this week

TL;DR

The order almost everyone should follow in 2026:

Contribute to your 401(k) up to the full employer match. Stop there for now.
Max an HSA if you have a high-deductible health plan ($4,400 single / $8,750 family in 2026).
Max a Roth IRA at $7,500 ($8,500 if you are 50 or older), income permitting.
Go back to the 401(k) and push contributions toward the $23,500 limit.
If you still have money left, look at a taxable brokerage or a mega backdoor Roth if your plan allows it.

Exception: if your current marginal tax rate is above 32%, the traditional 401(k) usually wins the tie against a Roth IRA. The math for each case is below.

The short answer: get the match, then max the Roth IRA, then fill the rest of the 401(k). That order beats the alternatives for the large majority of W-2 earners. The cases where it flips are specific and easy to identify once you know the numbers.

This post walks through the 2026 contribution limits, the tax math behind the decision, two worked scenarios at different incomes, and the edge cases that change the answer (Roth 401(k), backdoor Roth, mega backdoor Roth, state tax).

The order of operations, explained

Every dollar of retirement savings has a priority score based on how much free money and tax benefit it carries. Ranked from highest to lowest:

401(k) up to the employer match. A 50% match on the first 6% of your pay is an instant 50% return. Nothing else you do with money this year will beat that. Always capture the full match first.
HSA (if you have a high-deductible health plan). Triple tax advantage: pre-tax contribution, tax-free growth, tax-free withdrawals for medical expenses. After 65 you can withdraw for anything at ordinary income rates, same as a traditional 401(k). 2026 limits: $4,400 single, $8,750 family.
Roth IRA, up to $7,500. You get more investment choice than any 401(k) plan offers, no mandatory distributions at 73, and tax-free withdrawals in retirement. You can also pull contributions (not earnings) at any time without penalty, which makes it a quiet emergency-fund backup.
Rest of the 401(k), up to $23,500. Once the Roth IRA is full, pour whatever you can back into the 401(k). You get another chunk of pre-tax space and most plans have solid low-cost index funds.
Mega backdoor Roth or taxable brokerage. If your plan allows after-tax contributions with in-service conversions, you can move tens of thousands more into a Roth each year. If not, taxable brokerage is fine: long-term capital gains are taxed at 0, 15, or 20%, usually lower than ordinary income.

The reason Roth IRA beats the rest of the 401(k) in step 3 has nothing to do with Roth vs traditional tax treatment. It is about flexibility and fees. Most 401(k) plans have limited fund lineups and sometimes add record-keeping fees. An IRA at Fidelity, Schwab, or Vanguard gives you every low-cost index fund on the market.

How the tax math actually works

Traditional 401(k) and Roth IRA get you to the same finish line if your tax rate is identical now and in retirement. The difference comes from the gap between your current bracket and your future bracket.

Account	Contribution	Growth	Withdrawal
Traditional 401(k)	Pre-tax	Tax-deferred	Ordinary income
Roth 401(k)	Post-tax	Tax-free	Tax-free
Traditional IRA	Pre-tax (with limits)	Tax-deferred	Ordinary income
Roth IRA	Post-tax	Tax-free	Tax-free

The rule of thumb: if your current marginal rate is higher than the rate you expect in retirement, traditional wins. If your current rate is lower, Roth wins. If you honestly do not know, split the difference and do both.

Most people in retirement live on less gross income than they earned during peak years, which pushes them into a lower bracket. That is the argument for traditional. Working against that argument: federal tax rates are scheduled to rise in 2026 unless Congress extends the current brackets, and long-run fiscal pressure makes higher rates more likely than lower ones over a 30-year horizon. Roth hedges that risk.

2026 contribution limits, all in one place

Account	Base limit	Catch-up (50+)	Super catch-up (60 to 63)
401(k), 403(b), most 457	$23,500	+$7,500	+$11,250
Roth IRA / Traditional IRA	$7,500	+$1,000	n/a
HSA (family)	$8,750	+$1,000 (55+)	n/a
HSA (single)	$4,400	+$1,000 (55+)	n/a

The 401(k) super catch-up for ages 60 to 63 is a SECURE 2.0 feature and only runs during those four years. At 64 you drop back to the regular $7,500 catch-up. If you are in that window, it is the single best period to load the account.

Roth IRA income limits in 2026 (and the backdoor workaround)

Direct Roth IRA contributions phase out at higher incomes. The 2026 numbers:

Filing status	Full contribution	Phase-out range	No direct contribution
Single / Head of household	Up to $150,000	$150,000 to $165,000	Above $165,000
Married filing jointly	Up to $236,000	$236,000 to $246,000	Above $246,000

Above the phase-out cutoffs you cannot contribute directly, but you can still get money into a Roth through the backdoor Roth IRA: put $7,500 into a traditional IRA (non-deductible since you are over the income limit), then convert it to a Roth IRA. The conversion is tax-free as long as you have no other pre-tax IRA money sitting around. If you do, the pro-rata rule applies and part of your conversion becomes taxable.

The fix for the pro-rata problem: roll any existing traditional IRA balances into your current 401(k) before you start the backdoor routine. 401(k) balances do not count for pro-rata.

Scenario 1: 32 year old, $85k salary, 22% bracket

Alex is 32, earns $85,000, and pays federal taxes in the 22% bracket. Their employer matches 100% of the first 4% of salary ($3,400 per year). They can afford to save roughly $15,000 a year across all retirement accounts.

The right plan:

Contribute 4% of salary ($3,400) to the traditional 401(k) to capture the full match. Employer adds another $3,400. Total into 401(k): $6,800.
Max the Roth IRA at $7,500. Alex is well under the $150,000 phase-out, so direct contributions are easy.
Put the remaining $4,100 back into the 401(k). Total personal contribution: $3,400 + $7,500 + $4,100 = $15,000.

Why Roth over traditional at 22%? Alex is early in their career. Peak earning years are probably ahead, which means a higher bracket later. Locking in today's 22% rate on the Roth portion is cheap tax insurance. The traditional 401(k) match and the extra $4,100 still give a meaningful pre-tax deduction.

Scenario 2: 45 year old couple, $240k combined, 32% bracket

Jordan and Sam are married, 45, with a combined W-2 income of $240,000. They are in the 32% federal bracket and their state adds another 5%. Both have 401(k) plans with a 4% match. They can save around $60,000 a year.

The right plan:

Each contributes 4% to capture the full match. Combined employer contributions add roughly $9,600.
They are in the Roth IRA phase-out ($236,000 to $246,000 for joint filers). Each can make a partial direct contribution, or simpler, they both do backdoor Roth contributions for the full $7,500 each ($15,000 combined).
Both max the traditional 401(k) at $23,500 each ($47,000 combined). At a 32% federal + 5% state bracket, that saves them roughly $17,400 in current-year taxes.
If Jordan's plan allows after-tax contributions with in-service conversions, they can use the mega backdoor Roth to push another $20,000 to $30,000 into a Roth 401(k) subaccount each year.

At this bracket, traditional 401(k) beats Roth 401(k) for new contributions. A 37% combined marginal rate is high enough that almost any plausible retirement bracket will be lower. They should still have Roth money in the mix through the backdoor IRA, because having both buckets gives them tax flexibility in retirement.

When Roth beats traditional

You are in the 12% bracket or below. A 12% rate is historically low. Almost any future tax scenario leaves you paying more, so pay now.
You are early in your career. Your 20s and early 30s are usually your lowest earning years. Roth locks in that low rate.
You expect large taxable income in retirement. Rental properties, a pension, a large traditional IRA balance, or a business sale can push you into a higher bracket than you had while working.
You want to leave the account to heirs. Roth IRAs have no required minimum distributions during your lifetime and pass to heirs tax-free (subject to the 10-year drawdown rule).
You believe tax rates will rise. A defensible view given federal debt trajectory. Roth is the hedge.

When traditional beats Roth

You are in the 32%, 35%, or 37% bracket. The current tax savings are so large that even a modest drop in retirement makes traditional the winner.
You live in a high-tax state and plan to retire somewhere cheaper. Deducting in California (up to 13.3% state) and withdrawing in Florida (0%) is a clean arbitrage worth several percentage points per contribution.
You are within 10 years of retirement with a clear picture of your spending. If you know you will need $70,000 a year in retirement and that puts you in the 12% bracket, traditional wins easily.
You need the tax deduction to afford the contribution. A traditional 401(k) contribution of $23,500 in the 24% bracket only reduces your take-home by $17,860. The Roth version costs the full $23,500. If cashflow is tight, traditional lets you save more.

Should you use Roth 401(k) instead of Roth IRA?

Roth 401(k) is an increasingly common option. Contributions go in post-tax, but you stay in the same 401(k) plan with the same investment menu.

The case for Roth 401(k): you can put $23,500 in ($31,000 at 50+), far more than the $7,500 Roth IRA limit. If you want a large Roth balance and you are a high earner, this is the simplest path. Employer match goes into a traditional subaccount, so you still get some pre-tax diversification.

The case against: 401(k) plans have limited investment menus, sometimes higher fees, and required minimum distributions at 73 (unlike Roth IRA, which has none). If your plan fees are above 0.5% of assets, a Roth IRA is almost always better for the first $7,500.

Practical middle ground: do the Roth IRA first for the investment flexibility, then use traditional 401(k) for the pre-tax deduction on the rest. Only switch 401(k) contributions to Roth if you are already maxing both and want more Roth space.

Mega backdoor Roth: the advanced move

If your 401(k) plan allows after-tax contributions and in-service conversions or withdrawals, you can push significantly more into a Roth account each year.

The 2026 total 401(k) contribution limit (employee + employer + after-tax) is $72,000. Subtract your $23,500 employee contribution and whatever the employer puts in, and the remaining space can be filled with after-tax contributions that you then convert to Roth. For someone with a $6,000 employer match, that is roughly $42,500 of extra Roth space per year.

Check your plan's Summary Plan Description for the phrases "after-tax contributions" and "in-plan Roth conversions." If both are available, this is the highest-impact retirement move a high earner can make.

State tax considerations

Your state tax rate matters more than most people realize. If you live in a 0% state (Florida, Texas, Tennessee, Washington, and a few others), the Roth vs traditional tradeoff is federal-only. If you live in California (up to 13.3%), New York (up to 10.9%), or Oregon (9.9%), traditional contributions also shield you from state tax.

The biggest wins come from deducting in a high-tax state and withdrawing in a low-tax state. Retirees moving from California to Nevada can save 9% or more per dollar of traditional 401(k) withdrawal. If you are confident about your retirement state, factor it into the decision.

What if you cannot afford to max both?

Most people cannot. Maxing a 401(k) and a Roth IRA takes $31,000 a year, which is about 36% of an $85,000 gross salary. Here is the rank order when you have less:

$0 to match amount: hit the full employer match. Nothing else.
Match + up to $7,500: fill the Roth IRA after capturing the match.
Match + full Roth IRA + extra: put the extra back into the 401(k).
Going above $31,000 total: HSA if eligible, mega backdoor Roth if your plan allows it, taxable brokerage otherwise.

Saving 10 to 15% of gross pay for retirement from your mid-20s onward is usually enough to hit the standard 10x-by-67 target. Getting to 10% matters far more than optimizing the exact account mix. Start with the match, add the Roth IRA, and increase the rate by 1 percentage point at every raise.

Quick decision framework

Your situation	Order
20s, 12 or 22% bracket, decent match	Match, Roth IRA, rest of 401(k)
30s, 24% bracket, mid-career	Match, Roth IRA, rest of 401(k)
High earner, 32%+ bracket, under Roth phase-out	Match, Roth IRA, max traditional 401(k), mega backdoor
High earner, above Roth phase-out	Match, backdoor Roth IRA, max traditional 401(k), mega backdoor
Near retirement, clear picture, lower future bracket	Match, max traditional 401(k) with catch-up, Roth IRA last
Self-employed, variable income	Solo 401(k) or SEP-IRA, plus Roth IRA in low-income years

What to do this week

Log into your 401(k) portal and confirm two numbers: your current contribution percentage and your employer match formula. If your contribution is below the match threshold, raise it today. That is the one action with a guaranteed return.

Open a Roth IRA at Fidelity, Schwab, or Vanguard if you do not have one. It takes 15 minutes. Fund it with whatever you can spare up to $7,500. Pick a target-date fund or a three-fund index portfolio and ignore it.

The calculators below let you project what the combined plan looks like at 65 or 67. They run in your browser, so nothing you enter is sent anywhere.

401(k) Calculator for projecting your 401(k) balance at retirement with match and contribution changes.
Retirement Calculator for a full retirement projection including 401(k), Roth IRA, and taxable accounts.
Compound Interest Calculator for testing contribution scenarios on a Roth IRA over 20 or 30 years.
Investment Return Calculator for comparing different return assumptions on your combined portfolio.

Frequently asked questions

Should I max out my 401(k) or Roth IRA first in 2026?

Max your 401(k) up to the employer match first, then max the Roth IRA at $7,500, then go back and push the 401(k) toward the $23,500 limit. The match is a 50 to 100% instant return, the Roth IRA gives you more investment choice than any 401(k) plan, and the rest of the 401(k) is still valuable pre-tax space.

What is the 2026 Roth IRA contribution limit?

$7,500 if you are under 50, and $8,500 if you are 50 or older (that is the $7,500 base plus a $1,000 catch-up). The limits are the same for both Roth and traditional IRA, and the total across both account types cannot exceed the limit.

What are the Roth IRA income limits for 2026?

Single filers get the full contribution up to $150,000 of modified AGI, with phase-out between $150,000 and $165,000. Married filing jointly gets the full contribution up to $236,000, phasing out between $236,000 and $246,000. Above those ceilings you cannot contribute directly but can use a backdoor Roth.

Is a Roth 401(k) better than a Roth IRA?

A Roth IRA is usually better for the first $7,500 because it has more investment choice, no required minimum distributions, and often lower fees. A Roth 401(k) lets you contribute far more ($23,500 vs $7,500), so once you max the Roth IRA, Roth 401(k) is the right place for additional Roth dollars.

What tax bracket makes Roth better than traditional?

If you are in the 12 or 22% bracket, Roth usually wins because today's rates are historically low and you are likely to be in a similar or higher bracket later. At 32, 35, or 37%, traditional almost always wins because the current-year deduction is so large that even a moderate drop in retirement rates beats Roth.

Can I contribute to both a 401(k) and a Roth IRA in the same year?

Yes. The 401(k) limit ($23,500 base) and the Roth IRA limit ($7,500 base) are separate. You can fully fund both if your income allows for the Roth, which adds up to $31,000 of tax-advantaged contributions per year (or more with catch-ups after 50).

What is a backdoor Roth IRA and do I need it?

A backdoor Roth is a non-deductible traditional IRA contribution followed by a conversion to Roth, used by people whose income exceeds the direct Roth limits ($165,000 single / $246,000 married). You need it if you earn above those thresholds and still want Roth IRA space. Watch out for the pro-rata rule if you have existing pre-tax IRA balances.

How much should I contribute to my 401(k) to get the full match?

Contribute at least whatever percentage your employer matches. The most common formula is 50% of the first 6% of your pay, which means you need to contribute 6% to get the full 3% match. Check your plan's summary plan description, then set your contribution rate to at least that threshold.

What is the mega backdoor Roth and how much can I contribute?

It is a strategy where you make after-tax 401(k) contributions (not the same as Roth 401(k)) and immediately convert them to Roth. You can potentially add $30,000 to $42,500 or more per year to a Roth, depending on the employer match and your regular contributions, with a total 401(k) cap of $72,000 in 2026. Your plan must allow after-tax contributions and in-service conversions.

If I can only save a little, should it go into a 401(k) or a Roth IRA?

Always get the full 401(k) employer match first, even if that is all you can afford. If you have room beyond the match, direct the next dollars into a Roth IRA up to $7,500 because you get better investment options and tax-free withdrawals. Go back to the 401(k) only after the Roth is full.

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