Only about 14% of workers who have access to a 401(k) actually max it out. For 2025, that means most people are leaving up to $23,500 in tax-advantaged space on the table — and if you're 50 or older, the number climbs to $31,000. Here's exactly what the limits are, what changed, and how to use every dollar of room you have.
2025 401(k) Contribution Limits at a Glance
The IRS adjusts contribution limits annually for inflation. For 2025:
| Who | Employee Limit | Total with Catch-Up |
|---|---|---|
| Under age 50 | $23,500 | $23,500 |
| Age 50–59 | $23,500 | $31,000 |
| Age 60–63 (SECURE 2.0 super catch-up) | $23,500 | $34,750 |
| Age 64+ | $23,500 | $31,000 |
These limits apply to traditional 401(k), Roth 401(k), and SIMPLE IRA plans separately. They do not include your employer's contributions.
What Changed from 2024
The base employee limit rose by $500, from $23,000 in 2024 to $23,500 in 2025. That's a small bump — but compounded over decades, an extra $500 per year in a tax-deferred account adds up meaningfully.
The bigger change came from the SECURE 2.0 Act. Starting in 2025, workers aged 60 to 63 are entitled to a "super catch-up" contribution — the higher of $10,000 or 150% of the regular catch-up amount. For 2025, that works out to $11,250, bringing the total for this age group to $34,750.
Workers who turn 64 in 2025 return to the standard $7,500 catch-up, so planning around your 60th through 63rd birthdays can make a real difference in lifetime contributions.
How Catch-Up Contributions Work
Once you turn 50, you can contribute more than the base limit. The additional amount is called a catch-up contribution.
For 2025:
- Age 50–59: extra $7,500, for a total of $31,000
- Age 60–63: extra $11,250, for a total of $34,750
- Age 64+: back to $7,500, for a total of $31,000
Catch-up contributions work the same way as regular contributions — they come out of your paycheck pre-tax (traditional) or post-tax (Roth) and are subject to the same investment choices in your plan. You don't need to do anything special to unlock them; you just tell your HR system or payroll provider to increase your deferral past the base limit.
If you're in your 60s and playing catch-up on retirement savings, the 2025 super catch-up is worth using. Someone maxing out at $34,750 per year in a Roth 401(k) for four years (ages 60–63) shelters $139,000 from future taxes entirely.
Total Annual Additions Limit (Employer + Employee)
Your employee deferrals are only one part of the picture. The total amount that can go into your 401(k) from all sources — your contributions plus your employer's match and profit-sharing — is capped at the lesser of:
- $70,000 (up from $69,000 in 2024), or
- 100% of your compensation
Add catch-up contributions on top: workers 50+ can receive up to $77,500 in total contributions in 2025.
This total limit matters if your employer contributes heavily or if you're self-employed and run a solo 401(k), where you can contribute both as employee and employer.
Traditional 401(k) vs. Roth 401(k): Same Limits, Different Taxes
The $23,500 limit applies to the combined total of traditional and Roth contributions. You can split it any way you like — all traditional, all Roth, or a mix — but you can't exceed the limit across both.
| Traditional 401(k) | Roth 401(k) | |
|---|---|---|
| Contributions | Pre-tax (lowers taxable income now) | After-tax (no deduction now) |
| Growth | Tax-deferred | Tax-free |
| Withdrawals | Taxed as ordinary income | Tax-free (after age 59½) |
| RMDs | Required starting at age 73 | No RMDs starting 2024 |
| Best for | High earners now, lower income in retirement | Lower earners now, or expecting higher taxes later |
Unlike Roth IRAs, Roth 401(k)s have no income limits. A household earning $500,000 can still contribute to a Roth 401(k). That makes it a powerful option for high earners who are locked out of the direct Roth IRA path.
How Much Should You Actually Contribute?
There's a simple priority order:
1. At least enough to get your full employer match. If your employer matches 50% of contributions up to 6% of your salary, contributing less than 6% means leaving free money behind. A $70,000 salary with a 50%-up-to-6% match means $2,100 per year in free contributions — don't skip it.
2. Max out your HSA next (if you have one). A Health Savings Account offers triple tax advantage: pre-tax contributions, tax-free growth, and tax-free withdrawals for medical expenses. Most financial planners rank it above additional 401(k) contributions for this reason.
3. Then max your 401(k). Once you've captured the full match and funded an HSA, put as much as you can toward the $23,500 employee limit. Every dollar contributed at a 22% effective tax rate is like getting a 22% instant return before the money even hits the market.
4. Roth IRA if eligible. If your income allows it ($161,000 single / $240,000 married for full contributions in 2025), a Roth IRA gives you more investment choice and no RMDs.
What if You Can't Max Out?
Most people can't hit $23,500. That's fine — the important thing is consistent progress.
A practical approach: increase your contribution rate by 1% each year. On a $60,000 salary, 1% is $600 per year — about $50 per month — and many people don't notice the difference in their take-home pay after the initial adjustment.
Here's what consistent contributions look like at a modest $500/month into a 401(k) earning 7% average annual returns:
| Years invested | Total contributed | Estimated value |
|---|---|---|
| 10 years | $60,000 | ~$87,000 |
| 20 years | $120,000 | ~$260,000 |
| 30 years | $180,000 | ~$610,000 |
The compounding is doing most of the heavy lifting. Starting earlier matters more than the exact amount.
Use our Retirement Calculator to model your own contribution rate, expected returns, and retirement age to see if you're on track.
Deadlines and Mechanics
December 31 is the contribution deadline for employee deferrals — contributions must come out of your paycheck, so in practice you need to set your deferral rate before year-end. Unlike IRAs, you cannot make 401(k) contributions after the year ends.
Employer contributions can typically be made up to the tax-filing deadline (including extensions), so profit-sharing contributions for 2025 can arrive as late as October 2026 for most businesses.
If you leave a job mid-year, your contributions still count toward the annual limit. If you over-contribute across multiple plans at different employers, you must withdraw the excess by April 15 of the following year to avoid a 10% penalty and double taxation.
Bottom Line
The 2025 401(k) limits are $23,500 for most workers and up to $34,750 for those in the 60–63 window. At minimum, contribute enough to capture your full employer match — that's the highest guaranteed return available anywhere in personal finance. Beyond that, push your deferral rate up 1% per year until you're at or near the limit.
Tax-deferred compounding over 20 or 30 years is powerful. The limit increase to $23,500 is a reminder to revisit your election rate every January.
→ See if your retirement savings are on track with our Retirement Calculator