How Much to Contribute to Your 401(k) Each Year

Start with what you can afford, then work toward the employer match

The amount you contribute to your 401(k) depends on three things: how much money you have available, what your employer will match, and how much you want to save for retirement. There is no single "right" number—it depends on your situation. But most people should aim to contribute at least enough to capture their full employer match, because that is assistance programs you are leaving on the table otherwise.

The IRS sets an annual contribution limit—the maximum you are allowed to put in. For 2024, that limit is $23,500 if you are under 50, and $30,500 if you are 50 or older (the extra $7,000 is called a catch-up contribution). Your employer's plan documents will tell you what percentage of your salary you can contribute, though most plans allow you to go up to the IRS limit.

Start by finding out what your employer matches. This information is in your plan summary or benefits guide—ask your HR department if you cannot find it. Once you know the match formula, calculate the minimum contribution needed to get all of it. That is your floor. From there, contribute as much as your budget allows.

Key Takeaways

• Your employer match is the most important threshold—contribute enough to get 100 percent of it, because it is immediate return on your money.
• The IRS contribution limit for 2024 is $23,500 per year if you are under 50, and $30,500 if you are 50 or older.
• Your take-home pay will be smaller because 401(k) contributions come out before taxes, but your taxable income also shrinks.
• If you cannot afford to max out your plan, prioritize the employer match first, then increase contributions when your salary rises or expenses drop.

How employer match works and why it matters

An employer match is a promise to contribute money to your 401(k) based on what you contribute. The most common match is 50 percent of the first 6 percent of your salary—meaning if you earn $50,000 and contribute $3,000 (6 percent), your employer adds $1,500 (50 percent of $3,000). If you only contribute $2,000, your employer only adds $1,000. If you contribute nothing, you get nothing.

This match is not may provide forever. It depends on your plan's rules and your employer's financial situation. Some employers suspend or reduce matches during downturns. But while it is available, it is the highest-return investment you can make—your employer is giving you an instant 50 percent return on that portion of your contribution.

To find your match formula, look at your Summary Plan Description (SPD), which your employer must provide. It will say something like "we match 100 percent of the first 3 percent you contribute, and 50 percent of the next 2 percent." Calculate what percentage of your salary you need to contribute to capture the full match, then make that your minimum.

Calculating what percentage of your paycheck to contribute

Your 401(k) contribution is usually expressed as a percentage of your gross salary. If you earn $60,000 per year and contribute 10 percent, that is $6,000 per year, or about $500 per paycheck (if paid monthly). Your paycheck will show this as a pre-tax deduction.

To figure out what percentage to contribute, start with your employer match. If your employer matches 100 percent of the first 6 percent you contribute, you need to contribute at least 6 percent to get the full match. If your employer matches 50 percent of the first 6 percent, you still need to contribute 6 percent to get the full match (which would be 3 percent from your employer).

Once you have met the match, decide how much more you can afford. A common guideline is to save 10 to 15 percent of your gross income for retirement across all accounts, but that includes your employer match. So if your employer contributes 3 percent, you might aim for your own contribution of 7 to 12 percent. Start with what fits your budget and increase it when you get a raise or pay off a debt.

How contributions affect your paycheck and taxes

When you contribute to a traditional 401(k), the money comes out of your paycheck before federal income tax is calculated. This means your taxable income is lower, so you pay less in federal income tax that year. Your take-home pay will be smaller, but not by the full amount you are contributing—some of the reduction is offset by the tax savings.

For example, if you earn $5,000 per month and contribute $500 to your 401(k), your taxable income for that month drops to $4,500. If you are in the 22 percent federal tax bracket, you save about $110 in federal tax. So your net paycheck reduction is about $390, not the full $500. State income tax may also be reduced, depending on your state.

If your plan offers a Roth 401(k) option, contributions work differently—they come out after taxes, so you do not get an immediate tax break. But withdrawals in retirement are tax-free. Your plan documents will explain whether you have a Roth option and how it works.

Increasing contributions over time

You do not have to contribute the same amount every year. Most plans let you change your contribution percentage whenever you want, though some have limits on how often you can change it. The easiest time to increase contributions is when you get a raise—increase your contribution percentage by 1 or 2 percent and you may not notice the paycheck difference because you are used to earning less.

Some plans offer automatic escalation, where your contribution percentage increases by 1 percent each year until you reach a cap you set. This is a useful tool if you want to gradually increase savings without having to remember to make changes yourself. Check with your HR department to see if your plan offers this feature.

If you are behind on retirement savings or approaching retirement, you may want to contribute more aggressively. If you are 50 or older, you can contribute an extra $7,000 per year (the catch-up amount) on top of the regular limit. This is one of the few ways the tax code lets you make up for lower contributions in earlier years.

What happens if you contribute more than the IRS limit

If you try to contribute more than the annual limit, your plan administrator will catch it and return the excess to you, usually with any earnings that excess generated. This is called a corrective distribution. It is not a penalty—the plan is designed to prevent over-contributions—but it does mean that money does not get the tax benefit you were expecting.

If you have multiple employers or a 401(k) and an individual retirement account (IRA), the limits work differently. The $23,500 limit applies to all your 401(k) plans combined, not per plan. So if you worked at two companies in the same year and contributed to both plans, the total across both cannot exceed $23,500. IRAs have their own separate limit ($7,000 for 2024, or $8,000 if you are 50 or older).

Balancing 401(k) contributions with other financial goals

Contributing to retirement is important, but it is not the only financial goal that matters. If you have high-interest debt (credit cards above 8 percent), an emergency fund with less than three months of expenses, or other pressing needs, you may want to prioritize those before maxing out your 401(k). A reasonable approach is to contribute enough to get your full employer match, then tackle other goals, then increase 401(k) contributions as your situation improves.

If you have access to a Health Savings Account (HSA) through a high-deductible health plan, that account has tax advantages similar to a 401(k) and may be worth funding before you max out your 401(k). HSAs are triple-tax-advantaged: contributions are tax-deductible, growth is tax-free, and withdrawals for medical expenses are tax-free. Your plan documents will explain whether you have access to an HSA.

Frequently Asked Questions

What if my employer does not offer a match?

Contribute what you can afford, starting with at least 3 to 5 percent of your salary. Without a match, there is no immediate return, so the decision is purely about how much you want to save for retirement versus spending now. If your employer does not offer a 401(k) at all, you can open an individual retirement account (IRA) instead.

Can I change my contribution amount mid-year?

Yes, most plans let you change your contribution percentage at any time, though some require you to wait until the next pay period or the next plan year. Check your plan documents or ask HR about the timing. Changes usually take effect within one or two pay periods.

What if I leave my job before the year ends?

You keep the money you have already contributed, plus any employer match that has vested (become yours). Vesting schedules vary—some employers match immediately, others require you to work there for a year or more before the match is yours. Your plan summary will explain your vesting schedule. You can roll the balance into an IRA or your new employer's plan.

Should I contribute more if I expect a big bonus?

You can, but remember the annual limit applies to all contributions in a calendar year, including bonuses. If you contribute $20,000 from your regular salary and then receive a $5,000 bonus, you can only contribute $3,500 of the bonus (to stay under the $23,500 limit). Plan ahead if you know a bonus is coming.

Is there a minimum I have to contribute?

No. You can contribute as little as your plan allows—some plans have a minimum of 1 percent, others have no minimum. But if you contribute less than your employer match requires, you are leaving assistance programs on the table. At minimum, contribute enough to get the full match.