401(k) Contribution Limits 2026: How Much Can You Defer?

The 401(k) contribution limit is one of the most-searched tax topics every January — and with good reason. How much you can defer into a workplace retirement plan determines how much pretax income you can shelter (or after-tax if you choose Roth), how aggressively you can save for retirement, and how large your tax deduction might be each year.

For 2026, the IRS raised the basic employee deferral limit to $24,500, up $1,000 from 2025. Older participants can add catch-up contributions on top, and a brand-new “super catch-up” rule increases the limit even more for workers aged 60 through 63. Combine those employee deferrals with employer matching and profit-sharing, and total annual additions can reach $72,000 — or higher with catch-ups.

This guide breaks down every 2026 401(k) limit, explains who qualifies for catch-up and super catch-up contributions, covers the new Roth-only rule for high earners, and walks through how the numbers stack when you factor in employer contributions.

2026 401(k) contribution limits at a glance

Limit type	2026 amount
Employee deferral limit (traditional + Roth combined)	$24,500
Catch-up contribution (age 50+)	+$8,000 ($32,500 total)
Super catch-up contribution (age 60–63, if plan allows)	+$11,250 ($35,750 total)
Total annual additions limit (employee + employer)	$72,000
Total with regular catch-up	$80,000
Total with super catch-up	$83,250
Compensation limit (for contribution calculations)	$360,000

Source: IRS Notice 2025-XX and IRS retirement plan limits.

These limits apply to traditional 401(k), Roth 401(k), 403(b), most 457(b) plans, and the federal government’s Thrift Savings Plan (TSP).

The $24,500 employee deferral limit

The employee deferral limit is the maximum you can elect to defer from your paycheck into your 401(k) in 2026. This is your money — not employer contributions. It applies whether you choose:

• Traditional (pretax) 401(k) — lowers taxable income now, taxed when you withdraw in retirement
• Roth 401(k) — no upfront deduction, tax-free withdrawals in retirement if rules are met
• A combination — you can split the $24,500 any way you want across traditional and Roth

One limit across all employers: If you work for more than one company in 2026 that sponsors a 401(k), your total deferrals across all of those plans combined cannot exceed $24,500. Exceeding it can create an excess deferral problem that must be corrected, so coordinate with payroll or HR if you switch jobs mid-year.

What does not count toward the $24,500

• Employer matching contributions
• Employer profit-sharing or nonelective contributions
• After-tax (non-Roth) employee contributions (rare, but some plans allow them)
• Catch-up contributions if you are eligible

Those all sit in a different, larger bucket: the annual additions limit (covered below).

Catch-up contributions for age 50 and older

If you turn 50 or older by December 31, 2026, you can contribute an additional $8,000 on top of the $24,500 employee deferral, for a combined total of $32,500.

Catch-up contributions are meant to help older workers accelerate retirement savings as they near retirement age. You do not need to max out the regular $24,500 to use catch-ups — the extra $8,000 is available as soon as you hit age 50.

Example: A 52-year-old earns $100,000 and defers $32,500 into a traditional 401(k) in 2026. That is $24,500 regular deferral plus $8,000 catch-up. All $32,500 lowers her taxable income.

The new super catch-up for ages 60–63

SECURE 2.0, passed in late 2022, created a higher catch-up limit for participants who are age 60, 61, 62, or 63 at the end of the calendar year. For 2026, that super catch-up is $11,250 instead of the regular $8,000.

Key rules:

• You take whichever is higher — the super catch-up ($11,250) or the regular catch-up ($8,000). You do not get both.
• The super catch-up applies only if your plan allows it. Not all 401(k) plans have adopted this provision yet. Check with your HR or plan administrator.
• Once you turn 64, you revert to the standard $8,000 catch-up (or whatever the indexed amount is in future years).

Example: A 61-year-old in a plan that permits the super catch-up can defer $24,500 + $11,250 = $35,750 in 2026.

This is a major opportunity for workers in their early 60s who may be in peak earning years and want to aggressively fund retirement before leaving the workforce.

The $72,000 total annual additions limit

The annual additions limit (also called the 415(c) limit) caps the combined total of:

1. Your employee deferrals (excluding catch-up contributions)
2. Employer matching contributions
3. Employer nonelective contributions (profit-sharing, etc.)
4. Forfeitures allocated to your account

For 2026, this combined limit is $72,000 — or 100% of your eligible compensation, whichever is less.

With catch-up contributions included, the ceiling rises to:

• $80,000 if you are age 50+ using the $8,000 regular catch-up
• $83,250 if you are age 60–63 using the $11,250 super catch-up

What this means in practice

Most participants will never approach $72,000 because they would need very large employer contributions on top of maxing out their own deferrals. But it matters for:

• High earners who max deferrals and receive generous profit-sharing
• Solo 401(k) owners (self-employed with no employees other than a spouse) who act as both employee and employer
• After-tax contribution strategies — some plans allow non-Roth after-tax contributions up to the $72,000 ceiling, which can then be converted to Roth (the “mega backdoor Roth”)

Example: A 45-year-old employee defers $24,500, and her employer contributes a $10,000 match plus $15,000 profit-sharing. Total annual additions: $24,500 + $10,000 + $15,000 = $49,500. Well under the $72,000 cap.

The $360,000 compensation limit

For 2026, the maximum compensation that can be taken into account when calculating contributions is $360,000. This is mostly relevant for highly compensated employees — if you earn more than $360,000, your employer’s match or profit-sharing formula stops counting pay above that threshold.

Example: You earn $500,000, and your plan matches 5% of pay. The match is capped at 5% of $360,000 = $18,000, not 5% of $500,000.

New for 2026: mandatory Roth catch-up for high earners

Starting in 2026, the IRS is enforcing a SECURE 2.0 provision that requires certain high earners to make all catch-up contributions on a Roth (after-tax) basis.

Who it affects

If your FICA wages from your employer in the prior year exceeded $150,000, you must make any catch-up contributions — regular $8,000 or super $11,250 — into a Roth 401(k), not a traditional pretax 401(k).

Key points:

• The $150,000 test looks at prior-year FICA wages (typically Box 3 and Box 5 on your W-2) from that employer.
• It applies whether you are using the regular age 50+ catch-up or the age 60–63 super catch-up.
• If your plan does not have a Roth 401(k) option, you cannot make catch-up contributions at all under this rule (unless your employer amends the plan or you fall below the threshold).
• Your regular $24,500 deferral can still be split between traditional and Roth however you like — only the catch-up portion is forced Roth.

This rule is designed to raise revenue by taxing high earners’ catch-up contributions upfront rather than letting them defer taxes into retirement. Many plan sponsors are still finalizing their implementation, so confirm with your HR team how your plan handles it.

Solo 401(k) and self-employed limits

If you are self-employed and sponsor your own Solo 401(k) (also called an individual or one-participant 401(k)), you wear two hats: employee and employer.

• As the employee, you can defer up to $24,500 (plus catch-up if eligible).
• As the employer, you can contribute up to 25% of your compensation (20% of net self-employment income if you are a sole proprietor) or a flat dollar amount if you structure it as a profit-sharing contribution.

Combined, employee deferrals plus employer contributions cannot exceed the $72,000 annual additions cap ($80,000 or $83,250 with catch-up).

Solo 401(k) plans are powerful for consultants, freelancers, and small-business owners who want to shelter significant income. Just remember: you must have self-employment income (usually reported on Schedule C or via an S-corp or partnership) to make these contributions.

Traditional vs Roth 401(k): which should you choose?

Both count against the same $24,500 employee deferral limit, but the tax treatment differs:

Feature	Traditional 401(k)	Roth 401(k)
Tax treatment	Pretax (reduces taxable income now)	After-tax (no upfront deduction)
Withdrawals in retirement	Taxed as ordinary income	Tax-free if qualified distribution rules met
Best for	Expecting lower tax bracket in retirement	Expecting higher bracket, or want tax diversification
RMDs	Required at age 73+ under current law	Required at age 73+, but SECURE 2.0 eliminates Roth 401(k) RMDs starting in 2024*

*Note: SECURE 2.0 eliminated required minimum distributions (RMDs) for Roth 401(k) accounts starting in 2024, aligning them with Roth IRAs.

You can hedge by splitting contributions. Many people do traditional 401(k) contributions during peak earning years (when their tax bracket is highest) and shift to Roth later — or do Roth from the start if they are early career and expect income to rise.

What happens if you exceed the limit?

If you contribute more than $24,500 across all your 401(k) plans in 2026 (not counting allowed catch-ups), you have an excess deferral.

You must:

1. Notify the plan administrator by March 1, 2027 (for calendar-year plans).
2. Request a refund of the excess plus any earnings on it by April 15, 2027.
3. Include the excess in your 2026 taxable income and the earnings in your 2027 income.

If you do not fix it by April 15, you will be taxed on the excess twice — once when contributed and again when withdrawn in retirement. The IRS does not catch this automatically, so it is your responsibility to monitor if you have multiple employers or switch jobs mid-year.

Deadlines and plan-year considerations

• Most 401(k) contributions are made via payroll throughout the year.
• For self-employed Solo 401(k) owners, the contribution deadline is generally your tax-filing deadline (including extensions) — so April 15, 2027, for most 2026 contributions, or October 15, 2027, if you file an extension.
• You cannot make 2026 contributions after the deadline, even if you did not max out during the year.

Common questions

Can I contribute to both a 401(k) and an IRA?

Yes. The 401(k) limit and the IRA limit ($7,500 for 2026) are separate. You can max both if you have the cash flow. Keep in mind:

• Traditional IRA deduction may be reduced or eliminated if you (or your spouse) are covered by a workplace plan and your income exceeds certain thresholds.
• Roth IRA contributions phase out at higher income levels.

Do 401(k) contributions reduce my Social Security and Medicare taxes?

Traditional 401(k) pretax deferrals reduce federal income tax but do not reduce FICA (Social Security and Medicare) wages. You still pay FICA tax on the full gross pay.

Roth 401(k) contributions also do not reduce FICA wages (and they do not reduce income tax either, since they are after-tax).

Can I stop or change my 401(k) contributions mid-year?

Yes. Most plans allow you to change your deferral percentage at any time (some have blackout periods around open enrollment). If you get a windfall, you might dial up contributions to max out faster. If cash is tight, you can dial down or pause — just remember you are giving up employer match on the portion you skip.

What if my employer does not offer a 401(k)?

Consider:

• IRA (traditional or Roth) — $7,500 limit for 2026, plus $1,100 catch-up at age 50+
• SEP IRA or Solo 401(k) if you have self-employment income on the side
• Health Savings Account (HSA) if you have a qualifying high-deductible health plan — triple tax advantage and for 2026, $4,300 individual / $8,550 family contribution limits

No employer plan also means you may qualify for a full traditional IRA deduction regardless of income.

Related TaxPrepGuru reading

• 2026 Standard Deduction Amounts
• Federal Tax Brackets & Rates 2026
• Side-Hustle Taxes: Quarterly Payments
• W-2 vs 1099: What Filers Need to Know
• How to File Federal Taxes in 2026

Educational only — not investment or tax advice. 401(k) plan rules, contribution limits, and tax treatment can vary by plan. Confirm details with your plan administrator and consult a qualified tax professional or financial advisor for personal guidance.