How Much To Contribute To Your 401(k)

Start with what your employer will match, then increase from there

The amount you contribute to your 401(k) depends on three things: how much you can afford to set aside, how much your employer will match, and the IRS contribution limit for the year. Most people should contribute at least enough to capture their full employer match—that is assistance programs you forfeit if you don't. After that, contribute as much as your budget allows, up to the annual limit set by the IRS.

The IRS limit changes most years. For 2024, you can contribute up to $23,500 if you are under 50, or $31,000 if you are 50 or older (the extra $7,500 is called a catch-up contribution). For 2025, the limit is $24,500 under 50, or $32,500 at 50 and above. These limits apply to your own contributions only—your employer's match does not count toward your personal limit.

Key Takeaways

• Contribute enough to capture your full employer match, because that is immediate return on your money and the most common reason people leave retirement savings on the table.
• The IRS sets an annual contribution limit (currently $23,500 under 50, $24,500 in 2025) that applies only to your own contributions, not your employer's match.
• Your contribution is deducted from your paycheck before taxes, which lowers your taxable income for the year and reduces what you owe at tax time.
• If you cannot afford to max out your 401(k), prioritize the employer match first, then increase contributions gradually as your income rises or expenses fall.

How employer matching works and why it matters

Your employer's match is a percentage of what you contribute, up to a cap. The most common match is 50% of the first 6% you contribute—meaning if you earn $50,000 and contribute 6% ($3,000), your employer adds $1,500. If you contribute only 3%, your employer adds only $750, and you have left $750 on the table.

The match vests over time, meaning you do not own it immediately. Your plan document (which your HR department can provide) states the vesting schedule—often three to six years. Until you are fully vested, you forfeit the unvested portion if you leave the company. Vested money is yours to keep even if you quit.

Because the match is immediate return, most financial advisors recommend contributing at least enough to get the full match before you do anything else with your money. If your employer matches 50% of the first 6%, contribute at least 6%. If they match 100% of the first 3%, contribute at least 3%.

How much your contribution reduces your taxes

A 401(k) contribution is pre-tax, meaning the money comes out of your paycheck before federal income tax is calculated. If you earn $60,000 and contribute $6,000 to your 401(k), your taxable income for the year is $54,000, not $60,000. This lowers your tax bill at the end of the year.

The tax savings depend on your tax bracket. If you are in the 22% federal tax bracket and contribute $6,000, you save roughly $1,320 in federal taxes. State and local taxes may also apply, depending on where you live. This tax savings makes contributing to a 401(k) more affordable than it appears—you are not giving up the full amount from your take-home pay.

When you withdraw the money in retirement, you will pay income tax on it then. That is why it is called a tax-deferred account: you defer the tax bill until you take the money out.

Contribution limits and catch-up contributions

The IRS sets a maximum you can contribute each year. For 2024, that limit is $23,500 if you are under 50. If you are 50 or older, you can contribute an additional $7,500 as a catch-up contribution, for a total of $31,000. These limits apply only to your contributions—your employer's match is separate and does not reduce your limit.

The limit increases most years to keep pace with inflation. The IRS announces the new limit in October or November for the following year. Your plan administrator will notify you of the new limit, and your payroll system will enforce it automatically—you cannot accidentally exceed it.

If you have multiple 401(k) plans (for example, from two jobs), your total contributions across all plans cannot exceed the annual limit. If you contributed $15,000 to one employer's plan and then started a second job and contributed $10,000 to that employer's plan, your total is $25,000, which exceeds the 2024 limit of $23,500. You would need to reduce contributions to one plan or withdraw the excess before tax time.

Setting a contribution rate that fits your budget

Your contribution is expressed as a percentage of your gross pay. If you earn $4,000 per paycheck and contribute 10%, that is $400 per paycheck. Most plans let you choose any percentage from 1% to 100% (though you cannot exceed the annual dollar limit). You can change your contribution rate whenever you want—usually through your employer's benefits portal or by contacting HR.

A common strategy is to start with the minimum needed to capture your full employer match, then increase your contribution by 1% each time you get a raise. If you get a 3% raise, increase your 401(k) contribution by 1% and take home the remaining 2%. This way, your take-home pay does not shrink, but your retirement savings grow.

If money is tight, contribute only enough to get the full match and revisit the amount when your situation improves. Capturing the match is more important than maxing out the limit. A contribution you can sustain is better than a high contribution you reduce or stop after a few months.

What happens if you contribute too much

If you exceed the annual limit, the excess contribution and any earnings on it must be removed from your account by a deadline set by your plan (usually April 15 of the following year). Your employer's payroll system should prevent this by stopping contributions once you reach the limit, but errors can happen—especially if you changed jobs mid-year or have multiple plans.

If an excess contribution is not corrected by the deadline, you pay income tax on the excess twice: once when you contributed it (because it was not deducted from your taxes) and again when you withdraw it. This double taxation is a penalty for exceeding the limit. Contact your plan administrator immediately if you think you have over-contributed.

Roth 401(k) contributions and tax treatment

Some employers offer a Roth 401(k) option alongside the traditional 401(k). A Roth contribution is made with after-tax money—it does not reduce your taxable income this year. But when you withdraw the money in retirement, it comes out tax-free. The annual contribution limit applies to Roth and traditional contributions combined, not separately.

A Roth 401(k) makes sense if you expect to be in a higher tax bracket in retirement or if you want tax-free withdrawals later. A traditional 401(k) makes sense if you want to lower your taxable income now. Many people split their contributions between both types, but that is a personal decision based on your tax situation.

Frequently Asked Questions

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

Contribute what you can afford, starting with 3% to 5% of your pay. Without a match, there is no immediate return, so the decision is purely about how much you can save for retirement. If your employer offers no 401(k) at all, ask about a SEP-IRA or Solo 401(k) if you are self-employed, or open an IRA on your own.

Can I contribute to both a 401(k) and an IRA in the same year?

Yes. The annual limits are separate. You can contribute up to $23,500 to a 401(k) and up to $7,000 to an IRA in 2024 (or $8,000 if you are 50 or older). However, if you have a traditional IRA and a high income, your 401(k) contributions may limit how much of your IRA contribution you can deduct from your taxes. Check the IRS rules for your income level.

What if I change jobs mid-year?

Your contributions to both employers' plans count toward the same annual limit. If you contributed $12,000 to your first employer's 401(k) and then switched jobs and contributed $12,000 to your new employer's plan, your total is $24,000, which exceeds the 2024 limit of $23,500. You must withdraw the excess from one plan before the deadline.

Should I max out my 401(k) or pay off debt first?

Prioritize capturing your employer match first—that is may provide return. After that, the choice depends on your debt interest rate. High-interest debt (credit cards, personal loans above 6%) usually warrants paying that down before maxing out retirement savings. Lower-interest debt (mortgages, student loans below 4%) can coexist with 401(k) contributions.

Can I withdraw my contributions early without penalty?

Not without consequences. Withdrawals before age 59½ are subject to a 10% early withdrawal penalty plus income tax on the amount withdrawn. Some plans allow loans against your balance, which you repay to yourself with interest—that avoids the penalty but reduces your retirement savings. Check your plan document for loan rules.