Editor’s note (23 April 2026). An earlier version of this article stated the 2026 elective deferral limit as $24,000, which was wrong. The correct figure the IRS published in Notice 2025-94 is $24,500. All other figures on this page are now cross-checked against the same Notice and against IRS Publication 560 and IRS Publication 590-A. If any number below still looks off, please email sergioligero@gmail.com so we can correct it.
Why 401(k) limits matter
Your 401(k) is one of the most tax-efficient vehicles the US tax code makes available to a salaried worker. Contributions lower your taxable income for the year (traditional) or grow tax-free for life (Roth), and whatever your employer chips in is on top of that. The IRS caps how much can flow in each year, and those caps are indexed to inflation. Miss the cap in any given year and you can’t retroactively backfill it — the tax-advantaged space is gone.
For 2026, the IRS raised most of the key limits. Here is what they are, where I got the numbers, and how they affect the common planning decisions.
2026 limits at a glance
| Limit | 2025 | 2026 | Source |
|---|---|---|---|
| Elective deferral (§402(g)) | $23,500 | $24,500 | IRS Notice 2025-94 |
| Catch-up (age 50+) | $7,500 | $7,500 | IRS Notice 2025-94 |
| Super catch-up (age 60–63) | $11,250 | $11,250 | SECURE 2.0 §109 |
| Total §415(c) additions (under 50) | $70,000 | $72,000 | IRS Notice 2025-94 |
| HCE threshold (§414(q)(1)(B)) | $160,000 | $165,000 | IRS Notice 2025-94 |
| Key employee officer comp | $230,000 | $235,000 | IRS Notice 2025-94 |
| Annual comp cap (§401(a)(17)) | $350,000 | $360,000 | IRS Notice 2025-94 |
The standard employee contribution
For 2026, the most you can elect to defer from your own paycheck into a 401(k) is $24,500 (IRS Notice 2025-94). That number applies to traditional 401(k) contributions, Roth 401(k) contributions, or any combination — it’s a single bucket.
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If you work for more than one employer in a year and both offer a 401(k), the $24,500 limit is across all of them combined, not per plan.
Catch-up for 50 and older
If you turn 50 or older at any point in 2026, you can contribute an extra $7,500 on top of the standard $24,500, bringing your personal total to $32,000. This is unchanged from 2025 and reflects Congress’s judgement that workers late in their career should be able to save more.
Super catch-up for 60 to 63 (SECURE 2.0)
The SECURE 2.0 Act of 2022 added an extra “super catch-up” for workers aged 60, 61, 62, or 63. In 2026 that amount is the greater of $11,250 or 150% of the regular catch-up — i.e. $11,250 this year. If you qualify, your personal cap becomes $24,500 + $11,250 = $35,750.
One important wrinkle: under SECURE 2.0, if your FICA wages from the prior year exceeded a threshold currently set at $145,000, your entire catch-up contribution must be made on a Roth (after-tax) basis. That threshold was originally set for 2024 implementation; check with your plan administrator whether it is indexed for 2026 under your specific plan document.
Employer contributions and the §415(c) cap
The $24,500 (or $32,000 / $35,750 with catch-up) is just your own contribution. Employer matching contributions and profit-sharing contributions sit on top of that, capped by Internal Revenue Code §415(c) at $72,000 for 2026 (or $79,500 if you’re eligible for the 50+ catch-up).
A worked example
Sara is 35 and earns $120,000. Her employer matches 100% of the first 3% of salary and 50% of the next 2%, for a maximum employer match of 4% of pay. She maxes out her own contribution.
- Her contribution: $24,500
- Employer match (4% × $120,000): $4,800
- Total §415(c) additions: $29,300 — well under the $72,000 cap.
Sara’s cap matters most if her employer also offers after-tax contributions (sometimes called “mega backdoor Roth” contributions), since those can push her total annual additions much closer to the $72,000 ceiling.
Strategies that actually move the needle
1. Capture the full match first
If your employer matches part of your contribution, contribute at least up to the match threshold. That’s an immediate, risk-free return on your money — typically 50% or 100% — that you will never replicate elsewhere. Not contributing up to the match is the most common costly mistake in 401(k) planning.
2. Automatic contribution escalation
Most plans allow you to set a rule that your contribution percentage goes up 1 percentage point per year, up to a ceiling you choose. This is the single most evidence-backed behavioural intervention in the retirement literature. See the NBER working paper by Madrian and Shea (2001) for the original evidence on default-contribution and auto-escalation effects on 401(k) participation.
3. Traditional vs. Roth choice
The textbook answer is: choose Roth if you expect a higher marginal tax rate in retirement than you have today; traditional otherwise. In practice, most people underestimate their retirement income, so a mix is often sensible. If you are in the 22% or 24% federal bracket today and expect to be at a similar or higher bracket in retirement, Roth is rarely a wrong answer.
Note that the employer match is always deposited pre-tax regardless of whether your contribution is traditional or Roth — the tax will be owed when the match is withdrawn.
Special cases
Highly compensated employees
If your compensation in 2025 was above $165,000 (the 2026 HCE threshold; §414(q)(1)(B), IRS Notice 2025-94), your 2026 plan may be subject to nondiscrimination testing that caps your contribution below $24,500 if rank-and-file employees don’t contribute enough. This is plan-specific — ask HR for your plan’s latest ADP test results.
Multiple employers
The $24,500 elective deferral cap is per individual, not per plan. If you contribute $15,000 at employer A and $10,000 at employer B, you have exceeded the limit by $500 and will owe corrective distributions. Employer matching contributions, by contrast, are per-plan and can accumulate across employers within the overall §415(c) cap.
Self-employed / Solo 401(k)
If you’re self-employed, you can establish a Solo 401(k) and contribute both as the employee ($24,500, or $32,000 with catch-up) and as the employer (up to 25% of net self-employment earnings). The combined total is capped by §415(c) at $72,000 / $79,500. Full rules in IRS Publication 560.
Common mistakes
Over-contributing across jobs. If you change jobs mid-year, check your year-to-date elective deferrals before setting your new contribution rate. Excess deferrals that aren’t corrected by 15 April of the following year are taxed twice.
Not getting the full match. If your employer matches 50% up to 6% of salary and you only contribute 4%, you’re leaving a 2%-of-salary match on the table — every year, every future year.
Stopping at the match. Getting the match is the floor, not the ceiling. The tax advantages of further contributions still apply, even once the match is capped.
Frequently asked questions
Can I change my 401(k) contribution amount during the year?
Yes, in almost all plans. Changes typically take effect with the next full payroll cycle. Check your plan’s SPD (Summary Plan Description) for any specific cutoff dates.
What happens if I contribute too much?
An “excess deferral” must be withdrawn (plus any earnings) by 15 April of the following year, or it’s taxed twice — once in the original year and once when withdrawn. See IRS Publication 525 for the authoritative treatment.
Should I contribute to my 401(k) or pay down debt first?
Rule of thumb: always capture the full employer match (instant ~50% or 100% return), then pay down any debt with an interest rate higher than the ~7% long-run real return on a diversified equity portfolio — credit cards almost always qualify. After that, mortgage prepayment vs. retirement contribution becomes a closer call that depends on your marginal tax rate and your mortgage rate.
Sources and further reading
All figures above are from:
- IRS Notice 2025-94 — 2026 Cost-of-Living Adjustments (the authoritative source for all 2026 retirement plan limits)
- IRS Publication 560 — Retirement Plans for Small Business
- IRS Publication 590-A — Contributions to Individual Retirement Arrangements
- IRS Publication 525 — Taxable and Nontaxable Income
- Internal Revenue Code §415 (Cornell Law)
- Internal Revenue Code §414(q) — Highly compensated employee (Cornell Law)
- SECURE 2.0 Act of 2022 — H.R. 2617
- Madrian & Shea (2001) — The Power of Suggestion (NBER)
This article is general information, not personalised tax or retirement advice. For decisions about your specific situation, talk to a CPA, EA, or a fiduciary financial planner licensed in your state.
Fact-checked by Sergio Ligero on 23 April 2026 against the sources listed above.
