How Much to Contribute to Your 401(k)

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

The amount you should put in your 401(k) depends on three things: what your employer matches, what you can afford to live on, and how much you want saved by retirement. Most people should start by contributing enough to capture the full employer match—that is assistance programs you forfeit if you don't take it. After that, increase your contribution whenever you get a raise, until you reach a percentage that feels sustainable.

There is no single "right" number that works for everyone. A 25-year-old with 40 years until retirement can afford a lower percentage than a 50-year-old with 15 years left. Someone with a pension or rental income can contribute less than someone with only a 401(k). The goal is to find a rate you can stick with for decades without raiding the account early.

Key Takeaways

• Contribute at least enough to get your full employer match, since that is immediate return on your money and you lose it if you don't claim it.
• Your contribution comes out of your paycheck before taxes, so a 10% contribution costs less than 10% of your take-home pay.
• The IRS sets an annual limit on how much you can contribute; for 2024 it is $23,500 for people under 50 and $31,000 for people 50 and older.
• Increasing your contribution by 1% each time you get a raise is a practical way to save more without feeling the pinch in your budget.
• If you cannot afford to save much now, start small and plan to increase it later—something is better than nothing, and the account grows tax-deferred either way.

How employer matching works and why you should never leave it on the table

An employer match is a promise to add money to your 401(k) based on what you contribute. The most common match is 50% of the first 6% you contribute—meaning if you put in 6% of your salary, your employer adds 3%. If you contribute only 3%, they add only 1.5%. If you contribute 0%, they add nothing.

The match vests over time, usually three to five years. Vesting means the money becomes yours to keep even if you leave the job. Until it vests, the employer can take it back if you quit. Check your plan document or ask your HR department for your specific vesting schedule.

To find your employer's match formula, look at your plan summary or ask HR directly. The document will say something like "we match 100% of the first 3% and 50% of the next 2%." Once you know the formula, calculate the minimum contribution needed to get the full match. If your employer matches 50% of the first 6%, you need to contribute at least 6% to capture all of it. Anything less leaves money on the table.

What percentage of your salary should you aim for

Financial advisors often suggest saving 10% to 15% of your gross salary for retirement across all accounts. Your 401(k) is usually the main account where this happens. If your employer matches 3%, and you contribute 10%, you are putting in 10% and your employer adds 3%, for a total of 13% going into the account each year.

Start where you can afford to start. If 10% would leave you unable to pay bills, begin with 3% or 4% and increase it when your income rises. Many people find that a 1% increase each year—timed to a raise or bonus—goes unnoticed because the raise covers the extra contribution. Over ten years, a 1% annual increase takes you from 3% to 13% without ever feeling like a sacrifice.

Your age matters. If you are in your 20s or 30s, even 6% to 8% grows substantially over 30 or 40 years because of compound growth. If you are in your 50s, you may need to save 15% or more to make up for years of lower contributions. The IRS allows people 50 and older to contribute an extra $7,500 per year (called a catch-up contribution) specifically to address this gap.

How pre-tax contributions reduce your take-home cost

Your 401(k) contribution comes out of your paycheck before federal income tax is calculated. This means a 10% contribution does not cost you 10% of your take-home pay—it costs less, because you pay less income tax that year.

Here is a concrete example. Suppose you earn $60,000 per year and contribute 10% ($6,000). Your taxable income for the year becomes $54,000 instead of $60,000. If your tax rate is 22%, you save $1,320 in federal taxes. Your actual cost is $6,000 minus $1,320, or $4,680 out of your take-home pay. The higher your tax bracket, the bigger the savings.

This tax break is why 401(k)s are powerful: you reduce your taxes today while building retirement savings. You will pay taxes on the money when you withdraw it in retirement, but by then you may be in a lower tax bracket.

The IRS contribution limits and catch-up contributions for people 50 and older

The IRS sets a maximum amount you can contribute to your 401(k) each year. For 2024, the limit is $23,500 for people under 50. This limit changes each year and is adjusted for inflation, so check your plan summary or the IRS website for the current year.

If you are 50 or older, you can contribute an additional $7,500 per year, bringing your total to $31,000 for 2024. This catch-up contribution exists because people who started saving late need to accelerate their savings in their final working years. You do not have to ask permission—once you turn 50, your plan automatically allows the higher limit.

Most people never hit these limits. The average 401(k) contribution is around 7% to 8% of salary, which stays well below the maximum. But if you have a high income and want to save aggressively, knowing the ceiling helps you plan.

Adjusting your contribution as your income and life circumstances change

You can change your contribution rate at any time during the year. Most plans let you do this through your employer's benefits portal or by contacting HR. Changes usually take effect on the next paycheck or within a pay period or two.

Common times to increase contributions are after a raise, bonus, or promotion. If you get a 3% raise, increase your 401(k) contribution by 1% and use the remaining 2% raise to improve your take-home pay. You will not feel the difference, and your retirement savings accelerate.

Life changes also matter. If you pay off a car loan or mortgage, redirect that payment into your 401(k). If you have a child and your expenses rise, you might lower your contribution temporarily—this is normal and does not derail your long-term plan. The goal is to find a sustainable rate, not to maximize it at the cost of financial stress.

What to do if you cannot afford to contribute much right now

If your budget is tight, contribute just enough to get your employer match and nothing more. A 3% contribution that captures a full match is better than a 0% contribution that captures nothing. You can increase it later when your income rises or expenses fall.

Some employers offer automatic enrollment, which starts you at a default rate (often 3% to 6%) unless you opt out. If your plan has this, you are already saving something. Check your contribution rate to make sure it is at least high enough to get the full match.

If you have high-interest debt like credit card balances, you may want to pay those down before increasing your 401(k) contribution beyond the match. Credit card interest rates (often 18% to 25%) are higher than the long-term return most people expect from investments. But do not skip the match—that is a may provide return, and you can tackle debt and save simultaneously.

Frequently Asked Questions

What happens to my 401(k) if I leave my job?

Your vested balance stays in the account and continues to grow tax-deferred. You can leave it there, roll it to an IRA, or roll it to your new employer's plan if they allow it. Employer contributions that have not vested are forfeited and returned to the employer. Check your vesting schedule to know which money is yours.

Can I withdraw money from my 401(k) before retirement?

You can withdraw money, but you will owe income tax on it plus a 10% early withdrawal penalty if you are under 59½. Some plans allow loans instead, where you borrow from your own account and repay it with interest. Loans do not trigger the penalty, but you must repay them or they become taxable withdrawals. Avoid both if possible.

Should I contribute to a 401(k) or an IRA first?

Contribute to your 401(k) first if your employer offers a match—that match is assistance programs. After capturing the full match, you can contribute to an IRA if you want more tax-advantaged savings. An IRA gives you more control over investments and lower fees, but a 401(k) match is hard to beat.

Does my contribution rate have to stay the same all year?

No. You can change it as often as your plan allows, usually multiple times per year. Many people increase it after a raise or bonus, or decrease it temporarily if they face unexpected expenses. Changes take effect within one or two pay periods.

What if my employer does not offer a match?

Contribute what you can afford, starting with at least 5% to 10% of your salary if possible. Without a match, there is no immediate return, but the tax break and compound growth still make it worthwhile. If your employer offers no 401(k) at all, open an IRA instead—you get similar tax advantages and full control over your investments.