2026 401(k) Contribution Limits: Everything You Need to Know
Maximizing your retirement plan contributions is one of the most powerful ways to build long-term wealth while reducing your current tax bill. For 2026, the IRS has set contribution limits for 401(k), 403(b), and 457(b) plans. This guide covers every limit, including the enhanced catch-up provisions from SECURE 2.0, employer match rules, and the mega backdoor Roth strategy for those who want to contribute even more.
See how maxing out your 401(k) affects your paycheck with our 401(k) calculator and take-home pay calculator.
2026 Employee Contribution Limits
| Plan Type | Under Age 50 | Age 50-59 or 64+ | Age 60-63 |
|---|---|---|---|
| 401(k) | $24,000 | $31,500 | $35,250 |
| 403(b) | $24,000 | $31,500 | $35,250 |
| 457(b) Government | $24,000 | $31,500 | $35,250 |
| SIMPLE IRA/401(k) | $16,500 | $20,000 | $21,750 |
These limits apply to the total of your traditional (pre-tax) and Roth (after-tax) employee elective deferrals. They do not include employer matching contributions.
Understanding Catch-Up Contributions
Standard Catch-Up (Age 50+)
If you turn 50 or older during 2026, you can contribute an additional $7,500 beyond the standard limit, for a total of $31,500. This has been the standard catch-up amount for several years and applies to 401(k), 403(b), and governmental 457(b) plans.
Super Catch-Up (Ages 60-63) - New Under SECURE 2.0
Starting in 2025, the SECURE 2.0 Act introduced an enhanced catch-up for participants who are 60, 61, 62, or 63 years old. The catch-up limit is the greater of $10,000 or 150% of the standard catch-up amount. For 2026, that is $11,250 (150% x $7,500), bringing the total to $35,250. This provision recognizes that many workers are behind on retirement savings as they approach retirement.
Important: once you turn 64, you revert to the standard $7,500 catch-up limit. The super catch-up is specifically and only for ages 60 through 63.
Catch-Up Roth Requirement for High Earners
Under SECURE 2.0, starting in 2026, if you earned more than $145,000 in W-2 wages from your employer in the prior year, your catch-up contributions must be made on a Roth (after-tax) basis. This does not affect the standard $24,000 limit, only the additional catch-up amount. Workers earning $145,000 or less can still make pre-tax catch-up contributions.
Employer Contribution Limits
Employer matching or profit-sharing contributions are separate from your employee contributions but subject to an overall combined limit:
| Limit Type | 2026 Amount |
|---|---|
| Total (employee + employer), under 50 | $70,000 |
| Total (employee + employer), age 50-59 or 64+ | $77,500 |
| Total (employee + employer), age 60-63 | $81,250 |
| Compensation limit for calculating contributions | $350,000 |
The $350,000 compensation limit means employer match calculations are capped at this salary level. If you earn $500,000 and your employer matches 3%, the match is based on $350,000 (= $10,500), not $500,000.
Common Employer Match Formulas
Employer matches vary widely. Here are the most common structures:
- Dollar-for-dollar up to 3%: Employer matches 100% of your contributions up to 3% of salary
- 50 cents on the dollar up to 6%: Employer contributes 50% of your contributions up to 6% of salary (effectively 3%)
- Safe harbor match: 100% of the first 3% plus 50% of the next 2% (equals 4% if you contribute 5%)
- Profit-sharing only: Employer contributes a percentage regardless of your contributions
On a $100,000 salary with a 50%-up-to-6% match, the employer contributes $3,000 if you contribute at least $6,000. That is a 50% return on your first $6,000. Always contribute at least enough to get the full match.
The Mega Backdoor Roth Strategy
The mega backdoor Roth is an advanced strategy that allows high earners to contribute significantly more to Roth accounts. Here is how it works:
- You max out your employee contributions ($24,000 pre-tax or Roth).
- Your employer contributes their match (say $6,000).
- The combined total is $30,000, well below the $70,000 annual additions limit.
- If your plan allows after-tax (non-Roth) contributions, you contribute up to the remaining $40,000 in after-tax dollars.
- You then do an in-plan Roth conversion or in-service withdrawal to a Roth IRA, converting those after-tax dollars to Roth.
This effectively allows you to put up to $70,000 per year into Roth accounts, far exceeding the $7,000 Roth IRA limit. However, not all employer plans allow after-tax contributions or in-service conversions, so check with your plan administrator.
Strategy: How Much Should You Contribute?
The optimal contribution depends on your financial situation:
Priority Order
- Employer match (mandatory): Contribute at least enough to get the full match. Anything less is leaving free money on the table.
- High-interest debt: If you have credit card debt at 20%+ interest, paying that off likely beats additional 401(k) contributions beyond the match.
- Emergency fund: Maintain 3-6 months of expenses before maximizing retirement contributions.
- Max out Roth IRA ($7,000): For most workers under 50, this provides valuable tax diversification.
- Max out 401(k) ($24,000): If you can afford it, maximizing the 401(k) provides significant tax savings.
- HSA ($4,300 self / $8,550 family): If eligible, the HSA's triple tax advantage makes it extremely powerful.
- Mega backdoor Roth: If your plan allows it and you have surplus savings.
Tax Impact of Maxing Out Your 401(k)
Contributing the full $24,000 to a traditional 401(k) on a $100,000 salary reduces your taxable income to $76,000. The tax savings depend on your marginal bracket:
| Marginal Bracket | Federal Tax Saved | "Real" Cost of $24,000 Contribution |
|---|---|---|
| 12% | $2,880 | $21,120 |
| 22% | $5,280 | $18,720 |
| 24% | $5,760 | $18,240 |
| 32% | $7,680 | $16,320 |
State tax savings increase the benefit further. In California (9.3% marginal rate on this income), an additional $2,232 is saved, bringing the real cost of a $24,000 contribution to just $16,488 for someone in the 22% federal bracket.
403(b) and 457(b) Specifics
403(b) Plans
Available to employees of public schools, churches, and certain nonprofits. The contribution limits are identical to 401(k) plans. Some 403(b) plans with 15+ years of service offer an additional $3,000 catch-up (up to $15,000 lifetime). Investment options are sometimes limited to annuities and mutual funds.
457(b) Plans
Governmental 457(b) plans are unique because their limits are separate from 401(k)/403(b) limits. If you have access to both a 403(b) and a governmental 457(b), you can contribute $24,000 to each for a combined $48,000. Additionally, 457(b) plans have no 10% early withdrawal penalty regardless of age, making them more flexible for early retirees.
Bottom Line
Maxing out your 401(k) or similar plan is one of the best financial moves you can make. The combination of tax-deferred growth, employer match, and current tax savings creates a powerful wealth-building engine. Even if you cannot max out, increasing your contribution rate by 1-2% each year compounds dramatically over a career.
Model your specific scenario with our 401(k) calculator, compare traditional vs. Roth contributions in our 401(k) vs Roth IRA guide, or see the paycheck impact with our take-home pay calculator.