401(K) vs IRA: Which to Max Out First in 2026

Updated June 21, 2026

Key Takeaways

• Capture the full employer 401(k) match before anything else — Vanguard data puts the average match at 4.7% of salary, and no market return replicates that instant 50%–100% bump on the first 6% you contribute.
• After the match, a Roth IRA usually beats topping up the 401(k): index fund fees run 0.03%–0.10% versus 0.52% average plan cost, and a single filer earning under $153,000 keeps full Roth eligibility even when the traditional IRA deduction phases out at $91,000.
• If you earned more than $150,000 in 2025 FICA wages and are 50+, SECURE 2.0 forces your $8,000 401(k) catch-up into Roth starting January 1, 2026 — budget for the lost deduction (about $2,560 at a 32% bracket).
• Ages 60–63 get a four-year super catch-up window worth $35,750 in the 401(k) plus $8,600 in an IRA — $44,350 total in tax-advantaged space.

2026's Surprising Retirement Rule Changes: Why the Math Just Changed

The IRS raised contribution limits for 2026, and a new SECURE 2.0 rule forces high earners into Roth catch-up contributions. Together, they shift the math on which account to fund first.

First, the limits went up across the board. The 401(k) employee deferral limit is now $24,500, up from $23,500 in 2025, per IRS Notice 2025-67. The individual retirement account (IRA) contribution limit rose to $7,500, up from $7,000. Workers aged 50 and older get an $8,000 catch-up on their 401(k) — $32,500 total — and an extra $1,100 on their IRA, bringing that to $8,600.

Second — and this is the bigger shift — SECURE 2.0's mandatory Roth catch-up rule takes effect January 1, 2026. If you're 50 or older and earned more than $150,000 in Federal Insurance Contributions Act (FICA) wages in 2025, your 401(k) catch-up contributions must go into a Roth account. No choice. That means those extra dollars go in after-tax, and you lose the upfront deduction on the catch-up portion.

Then there's the super catch-up. Workers aged 60 through 63 can now contribute an additional $11,250 to their 401(k) — $35,750 total — instead of the standard $8,000 catch-up. This is a narrow four-year window that closes when you turn 64.

For someone in the 24% federal bracket, maxing both accounts at these levels shelters roughly $10,644 from current-year taxes. That makes the order you fund these accounts worth a second look.

401(k) vs. IRA: Breaking Down the 2026 Contribution Limits and Flexibility

Before deciding which to fund first, you need to understand what each account actually gives you.

The 401(k)'s biggest advantage is sheer contribution capacity — $24,500 versus $7,500 — and the employer match. According to the Vanguard How America Saves 2025 report, the average employer match is 4.7% of salary, and the most common structure is 50 cents on the dollar for the first 6% you contribute

Recommended reading: Limited

The IRA's edge is flexibility. You pick your brokerage, choose from thousands of funds, and typically pay far less in fees. The gap is meaningful: a 0.52% fee on a $500,000 balance costs $2,600 per year versus $150 at 0.03%. Over 30 years, that difference compounds to tens of thousands of dollars.

There are no income limits on 401(k) contributions — a surgeon earning $400,000 and a teacher earning $55,000 both get the full $24,500. IRAs are more restrictive. Roth IRA contributions phase out between $153,000 and $168,000 in modified adjusted gross income (MAGI) for single filers, and between $242,000 and $252,000 for married filing jointly, per IRS guidelines.

Who should not use a 401(k) first: Self-employed workers without an employer plan. You'd look at a Simplified Employee Pension (SEP) IRA or solo 401(k) instead.

Who should not use an IRA first: Anyone whose employer offers a match they haven't captured yet. The match return dwarfs any fee or flexibility advantage.

Tax Advantages and Phase-Outs: Which Account Fits Your Income?

This is where the decision gets personal. The tax treatment of each account depends heavily on your income.

A traditional 401(k) contribution reduces your taxable income dollar-for-dollar. If you earn $100,000 and contribute $24,500, you're taxed on $75,500. At the 22% marginal rate, that's $5,390 less in federal taxes this year. The money grows tax-deferred, and you pay ordinary income tax when you withdraw it in retirement.

A Roth IRA works in reverse. You contribute after-tax dollars — no deduction today — but withdrawals in retirement are completely tax-free. No tax on the growth, no tax on the principal, no RMDs forcing you to draw it down.

The traditional IRA sits in between, and here's where the phase-outs create problems. If you're covered by a workplace retirement plan (which you are if your employer offers a 401(k) you're eligible for), your traditional IRA deduction starts phasing out at $81,000 MAGI for single filers and disappears entirely at $91,000, per IRS Notice 2025-67. For married filing jointly, it's $129,000 to $149,000.

Compare that to Roth IRA eligibility: you can contribute in full up to $153,000 single or $242,000 married filing jointly. The gap is huge. A single filer earning $120,000 gets zero deduction on a traditional IRA but full Roth IRA eligibility. The Roth is the obvious choice.

Put simply: if you have a 401(k) at work and earn more than $91,000, the traditional IRA deduction is gone — but the Roth IRA stays available until $153,000. For most workers with a 401(k) at work and income above $91,000, the traditional IRA deduction is gone — which makes the Roth IRA the default choice.

For high earners above the Roth income limits, the backdoor Roth IRA — contributing to a non-deductible traditional IRA and immediately converting to Roth — remains available. Fidelity and Vanguard both document this process in their investor education materials. It adds a step, but the result is the same: tax-free growth in a Roth.

SECURE 2.0's Hidden Changes: Roth Catch-Ups and Super Catch-Ups

If you're over 50, 2026 brings two rules you need to plan around.

Mandatory Roth catch-up for high earners. Starting January 1, 2026, if you earned more than $150,000 in FICA wages during 2025 and you're 50 or older, your 401(k) catch-up contributions must be designated Roth. This means that extra $8,000 (or $11,250 if you're 60–63) goes in after-tax. You lose the upfront deduction on the catch-up portion, per IRS final regulations on SECURE 2.0 Section 603.

This isn't optional. Your plan administrator should handle it automatically, but the cash-flow impact is real. If you were counting on that $8,000 catch-up to reduce your current-year tax bill, you'll need to adjust. At a 32% marginal rate, that's $2,560 less in tax savings this year.

The silver lining: those Roth catch-up dollars grow tax-free and come out tax-free in retirement. For someone with 10–15 years until retirement, the long-term math likely favors Roth treatment anyway — you're trading a known deduction today for decades of tax-free compounding.

Super catch-up for ages 60–63. This is genuinely new and underutilized. If you're between 60 and 63 in 2026, you can contribute $11,250 in catch-up contributions — $3,250 more than the standard $8,000 — for a total 401(k) limit of $35,750.

This is a four-year window. At 64, you drop back to the standard catch-up. If you're 61 in 2026, you have three years to take advantage of this. At $35,750 per year plus $8,600 in IRA contributions, that's $44,350 annually in tax-advantaged space — a powerful accelerator for anyone who started saving late or wants to front-load their final working years.

The 2026 Optimal Strategy: Step-by-Step for Every Income Level

The consensus from Fidelity, Vanguard, and most fee-only financial planners is a five-step priority waterfall. Here's how it works with real numbers at three income levels.

Check your credit score for free — Kapitalwise

Step 1: 401(k) up to the full employer match.
This is non-negotiable. The match is free money with an immediate return that no market investment can replicate.

Step 2: Max your Roth IRA ($7,500).
Better investment options, lower fees, no RMDs, and tax-free growth. If your income exceeds the Roth limits, use a backdoor Roth.

Step 3: Max your 401(k) ($24,500 total).
Go back and fill the remaining 401(k) space. The tax deduction on traditional 401(k) contributions is valuable at higher brackets.

Step 4: Health savings account (HSA) if eligible ($4,400 single / $8,750 family in 2026).
Triple tax advantage — deductible going in, tax-free growth, tax-free withdrawals for medical expenses.

Step 5: Taxable brokerage account.
Once all tax-advantaged space is used, invest in low-cost index funds in a taxable account Most people at $75,000 won't max both accounts. That's fine. The priority order still holds: match first, then Roth IRA, then additional 401(k).

$100,000 salary (single, age 45)
- Step 1: Contribute 6% ($6,000) → employer adds $3,000
- Step 2: Contribute $8,600 to Roth IRA (including catch-up)
- Step 3: Max 401(k) to $32,500 (including catch-up)
- Total tax-advantaged savings: $44,100 (including match)
- Federal tax reduction from traditional 401(k): ~$7,150 (at 22% marginal rate on $32,500)

$160,000 salary (single, age 52)
- Step 1: Contribute 6% ($9,600) → employer adds $4,800
- Step 2: Roth IRA — income is between $153,000–$168,000 phase-out, so partial contribution (roughly $5,000). Consider backdoor Roth for the full $8,600. - Step 3: Max 401(k) to $32,500. Catch-up portion ($8,000) must be Roth under SECURE 2.0's mandatory rule (2025 FICA wages exceed $150,000). - Total tax-advantaged savings: ~$45,900

Notice the mandatory Roth catch-up kicks in here. The first $24,500 of your 401(k) can be traditional (deductible), but the $8,000 catch-up must be Roth. Your tax deduction drops compared to prior years.

Action Plan: Maximize Tax Savings and Employer Matches in 2026

Let's translate strategy into action.

If you earn under $81,000 (single): You have full access to every account type. Traditional IRA deductions, Roth IRA contributions, 401(k) — everything is on the table. Follow the waterfall: match, then Roth IRA, then 401(k). At this income, the Roth IRA is almost always the right IRA choice because you're in a lower tax bracket now and likely to be in a similar or higher one later.

If you earn $81,000–$153,000 (single): The traditional IRA deduction is partially or fully phased out, but you still qualify for a full Roth IRA. This is the sweet spot for the standard strategy. Your 401(k) gives you the pre-tax deduction, your Roth IRA gives you tax diversification. Don't bother with a traditional IRA — without the deduction, it's strictly worse than a Roth.

If you earn over $168,000 (single): You're above both the traditional IRA deduction phase-out and the Roth IRA contribution phase-out. Use a backdoor Roth IRA: contribute $7,500 to a non-deductible traditional IRA, then convert to Roth immediately. There's no income limit on conversions. Then max your 401(k) for the full deduction — at the 32% or higher bracket, $24,500 in traditional 401(k) contributions saves you at least $7,840 in federal taxes.

If you earn over $250,000 (married filing jointly): Same backdoor Roth approach for the IRA. Your 401(k) deduction is especially valuable here. Also check whether your plan allows after-tax contributions with in-plan Roth conversions (the "mega backdoor Roth"). The 2026 annual additions limit is $72,000 including employer contributions, per IRS guidelines — if your employer contributions and your $24,500 deferral total less than $72,000, you may be able to contribute the difference as after-tax and convert it.

If you're 60–63: This is your window. The super catch-up lets you shelter $35,750 in your 401(k) alone. Combined with an IRA ($8,600 with catch-up), that's $44,350 in tax-advantaged space. If you've been under-saving, these four years are the most powerful catch-up opportunity the tax code has ever offered. Increase your 401(k) deferral percentage now — most plan administrators need a few pay cycles to adjust.

One mistake to avoid: Don't split contributions evenly across the year if your employer matches per-paycheck. Some plans only match contributions made in each pay period — if you max out your 401(k) by October, you miss three months of matching. Check whether your plan offers a "true-up" provision that corrects for this. If it doesn't, spread your contributions across all 26 (biweekly) or 24 (semi-monthly) pay periods.

If you're looking for where to open a Roth IRA, we compared the best Roth IRA providers for hands-off investors and the top robo-advisors by fees and features earlier this year.

Building a richer life starts with putting each dollar in the account where it works hardest. The order — match, Roth IRA, 401(k) — isn't complicated. What's new in 2026 is how much more space you have to fill, and how SECURE 2.0 changes the rules for catch-up contributions. Adjust your deferrals now. The year is already underway, and every pay period you delay is tax-advantaged space you can't get back.

Found an error? At Canopy Press, accuracy comes first. If you spot a claim that needs checking, let us know at [email protected] — we'll verify and correct it immediately.

Sources

• FRED - 10-Year Treasury Yield
• FRED - 30-Year Fixed Mortgage Rate
• FRED - Federal Funds Effective Rate
• FRED - Consumer Price Index (CPI)
• FRED - Unemployment Rate
• Yahoo Finance - S&P 500
• Yahoo Finance - 10-Year Treasury Yield (Market)
• Yahoo Finance - CBOE Volatility Index (VIX)
• Yahoo Finance - US Dollar Index
• Yahoo Finance - Gold Price (per oz)