How Much You Can Put Into Your 401(k) Each Year

The annual contribution limit for 2024 is $23,500 if you are under 50, and $30,500 if you are 50 or older

The IRS sets a ceiling on how much you can contribute to your 401(k) each year. For 2024, that limit is $23,500 for workers under age 50. If you are 50 or older, you can contribute an additional $7,500 as a catch-up contribution, bringing your total to $30,500. These limits change most years, usually by $500 increments when inflation crosses certain thresholds.

Your employer may also contribute to your account through matching or profit-sharing. Those employer contributions count toward a separate, higher limit — the total that can go into your account from all sources combined is $69,000 for 2024 (or $76,500 if you are 50 or older). But the $23,500 or $30,500 figure is the only one you need to track yourself, because it is the only part you control.

If you contribute more than the limit, the excess stays in your account but becomes taxable income for that year, and you may owe a penalty. Your plan administrator should catch this and notify you, but it is your responsibility to correct it by the tax filing deadline.

Key Takeaways

• You can contribute up to $23,500 in 2024 if you are under 50, or $30,500 if you are 50 or older, from your own paycheck.
• Employer contributions (matching, profit-sharing, or other types) do not count against your personal limit and can push the total much higher.
• The IRS limit changes most years, usually by $500, so check your plan documents or the IRS website each January to confirm the current year's amount.
• Contributing more than the limit triggers taxes and penalties on the excess, so payroll should help you stay under by adjusting your withholding if needed.

How the limit breaks down between you and your employer

The $23,500 (or $30,500 at 50+) is money that comes from your paycheck. Your employer deducts it before taxes and sends it to the plan. This is called an employee deferral.

Your employer can also put money in. A matching contribution — where your employer matches a percentage of what you contribute — does not count toward your $23,500 limit. Neither does a profit-sharing contribution or any other employer money. All employer contributions go into a separate pool with a much higher ceiling. The combined limit (employee plus employer) is $69,000 for 2024, but you do not manage that number. Your payroll department and plan administrator track it.

In practice, this means you can max out your $23,500 personal contribution and still receive employer matching without hitting any problem. The employer money sits on top.

What happens if you contribute too much

If your contributions exceed the annual limit, the excess amount is called an excess deferral. It remains in your account, but the IRS taxes it twice: once in the year you contributed it, and again when you withdraw it in retirement. You may also owe a 6% penalty tax each year the excess stays in the account.

Your plan is required to monitor this. If payroll deductions push you over the limit — which can happen if you change jobs mid-year and both employers withhold the full amount — the plan administrator should catch it and notify you. You then have until the tax filing deadline (usually April 15 of the following year) to request a correction. The plan will remove the excess and any earnings on it, and you will owe taxes only on the earnings, not the excess itself.

The best way to avoid this is to track your contributions across all employers if you have more than one job. If you change jobs mid-year, tell your new employer's payroll how much you have already contributed that year so they can adjust your withholding accordingly.

Catch-up contributions if you are 50 or older

At age 50, the IRS allows an additional catch-up contribution of $7,500 per year (in 2024). This is designed to help workers in their final years before retirement save more. You do not have to ask for permission — once you turn 50, you can simply instruct payroll to withhold the higher amount.

The catch-up contribution is separate from your regular limit. You can contribute the full $23,500 as a regular deferral and the full $7,500 as a catch-up, for a total of $30,500 from your paycheck. If you have an employer match, it still does not count against either limit.

Some plans also offer a catch-up contribution for highly compensated employees, but this is rare and has different rules. Ask your plan administrator if your plan offers it.

How limits change year to year

The IRS adjusts contribution limits for inflation. The adjustment happens in $500 increments, so the limit does not change every year — it changes only when cumulative inflation crosses a $500 threshold. In recent years, limits have increased in 2023, 2024, and are likely to increase again in 2025, but the exact amount depends on inflation data released in October of the prior year.

Your plan administrator should notify you of any change by December 31 of the year before it takes effect. You can also check the IRS website or your plan's summary plan description to confirm the current limit. If you are close to maxing out your contribution, it is worth checking in late fall to see whether the limit will rise the following January.

Contributing across multiple employers

If you work two jobs or change employers during the year, your contributions to both 401(k) plans count toward the same annual limit. The IRS does not have separate limits for each employer — it is one limit per person per year.

This creates a risk: if you contribute $15,000 at your first job and then move to a second job where you contribute another $15,000, you have hit $30,000 and exceeded the $23,500 limit. You are responsible for tracking this across employers. Payroll at each employer only knows about the contributions at that employer.

If you realize mid-year that you are on track to exceed the limit, contact your current employer's payroll and ask them to stop withholding 401(k) contributions for the rest of the year. You can resume in January. If you have already gone over, request a correction from your current plan administrator as soon as possible.

Roth 401(k) contributions have the same limit

Some employers offer a Roth 401(k) option alongside the traditional 401(k). The contribution limit is the same: $23,500 (or $30,500 at 50+) for 2024. But here is the key difference: if you contribute to both a traditional 401(k) and a Roth 401(k) at the same employer, your contributions to both combined cannot exceed the limit.

For example, if you contribute $15,000 to a traditional 401(k) and $10,000 to a Roth 401(k) at the same plan, you have used $25,000 of your $23,500 limit and exceeded it by $1,500. You would need to reduce one or both contributions. Employer contributions to either type still do not count against your personal limit.

Frequently Asked Questions

Can I contribute more if my employer does not offer a match?

No. The contribution limit is set by the IRS and applies to all 401(k) plans regardless of whether your employer matches. The limit is $23,500 (or $30,500 at 50+) in 2024. An employer match is a bonus on top, not a replacement for the limit.

What if I max out my 401(k) before the end of the year?

Tell your payroll department to stop withholding 401(k) contributions for the remaining pay periods. You can resume contributions in January of the next year. If you have an employer match, check whether your plan continues to match after you stop contributing — some plans do, some do not.

Do I have to contribute the maximum amount?

No. The limit is a ceiling, not a requirement. You can contribute any amount from $0 up to the limit. Many people contribute less than the maximum based on their budget or other financial priorities.

If I have a 401(k) and an IRA, do the limits combine?

No. The $23,500 limit applies only to 401(k) plans. IRAs have a separate limit of $7,000 for 2024 (or $8,000 at 50+). You can max out both in the same year without penalty.

What if my plan allows in-service conversions to a Roth 401(k)?

An in-service conversion lets you move existing 401(k) money into a Roth 401(k) within the same plan. This does not change your contribution limit — it is a separate transaction. You can still contribute $23,500 to either account type in 2024, but combined contributions to both cannot exceed that amount.