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By Jamie Reeves, Personal Finance Writer

How Much Should I Contribute to My 401(k)?

A set of stacked stones of increasing size on a plain surface

A widely used target is 15% of gross pay including your employer’s match — but the order matters more than the number. Contribute at least enough to capture the full match first; that is an immediate return no investment reliably beats. If you carry high-interest debt, clearing it usually outranks contributing beyond the match. Then work toward 15% total. The ceiling on your own deferrals is $24,500 for 2026, plus an $8,000 catch-up at 50 or older. Starting at 22, 10–15% is generally enough; starting at 45, it is usually 20% or more.

“15%” gets repeated so often that people either hit it and stop thinking, or fall short and feel defeated. Both miss that the first few percentage points are worth far more than the last few.

The Priority Order

  1. Contribute enough to get the full employer match. A 50% match on the first 6% of pay is a 50% return on that money before any market growth. Nothing else on this list competes with it. Contributing less than the match threshold is declining part of your compensation.
  2. Clear high-interest debt. Credit card debt at 20–25% beats an uncertain market return reliably. Paying it off is a guaranteed return equal to its interest rate.
  3. Build a small emergency fund. Without one, a car repair becomes new credit card debt or a 401(k) loan — and either undoes the contributions you were protecting.
  4. Work up toward 15% of gross, including the match. If your employer contributes 4%, you need 11% to get there.
  5. Then consider going further, up to the IRS limit.

The 2026 Limits

Limit2026 amount
Your elective deferrals$24,500
Catch-up, age 50+$8,000
Catch-up, ages 60–63 (SECURE 2.0)$11,250
Total annual additions (you + employer + after-tax)$72,000
Total annual additions incl. catch-up$80,000 ($83,250 at ages 60–63)

Per the IRS. Employer matching does not count against your personal $24,500 deferral limit — which is why the match is effectively free capacity.

What the Tax Break Actually Does

A traditional 401(k) contribution lowers your income tax but not your Social Security and Medicare tax. The contribution is excluded from the wages your income tax is computed on, so in the 22% bracket a $200 contribution reduces take-home by about $156, not the full $200. But it is still counted in your FICA wages, so you pay the full 7.65% on it either way.

That distinction surprises most people. The deductions that escape bothincome tax and FICA are HSA and FSA contributions and Section 125 premiums — see which paycheck deductions are pre-tax. For the now-versus-later trade, see Roth vs traditional 401(k).

By-Age Benchmarks (Use Loosely)

AgeCommon benchmark
30~1× salary saved
40~3× salary
50~6× salary
60~8× salary
67~10× salary

These are widely circulated industry rules of thumb built on assumptions about retirement age, spending, and Social Security — not IRS rules, not requirements, and not personalised. Treat them as a direction check, not a grade.

If You Are Starting Late

The arithmetic is unforgiving but not hopeless. Compounding does most of the work across 30–40 years, so starting at 45 means buying growth with contributions instead of time — commonly 20–25% of gross. Three levers help: the age-50 catch-up, directing every raise straight into the contribution rate so your take-home never drops, and working a few years longer, which shortens the retirement being funded while lengthening the period funding it.

The One Mistake With a Real Penalty

Exceeding the deferral limit creates an excess deferral, which must be withdrawn by the following April 15 or it is taxed twice — once in the year contributed and again on distribution. It happens most often after a mid-year job change, because each employer tracks only its own plan and neither sees your combined total. If you switched jobs, add the deferrals from both W-2s and check. Same structural blind spot that causes over-withheld Social Security after a job change — see why your paycheck changed.

Sources and Methodology

Contribution and catch-up limits and annual additions: IRS 401(k) and Profit-Sharing Plan Contribution Limits. Excess deferrals and the April 15 correction deadline: IRS. FICA treatment: IRS Topic 751. The 15% target and the by-age multiples are widely used industry rules of thumb, flagged as such above rather than presented as official guidance. General information, not tax or investment advice; your plan documents govern. Last updated July 30, 2026.

Frequently Asked Questions

A widely used target is 15% of gross pay including your employer's match, but the order of operations matters more than the number. First contribute at least enough to capture the full employer match — that is an immediate return no investment reliably beats. Then, if you carry high-interest debt, clearing it usually outranks contributing beyond the match. After that, work toward 15% total, and if you can go further the ceiling is the IRS elective deferral limit of $24,500 for 2026. Someone starting at 22 can reach a comfortable retirement on roughly 10–15%; someone starting at 45 generally needs 20% or more, because they have fewer years of compounding to work with.
You can defer up to $24,500 of your own pay in 2026. If you are 50 or older you can add a catch-up contribution of $8,000, and under SECURE 2.0 those aged 60 to 63 get a larger catch-up of $11,250. Separately, total annual additions — your deferrals plus employer contributions plus any after-tax contributions — cannot exceed $72,000, or $80,000 including catch-up ($83,250 for ages 60 to 63). Employer matching money does not count against your personal $24,500 deferral limit, which is why the match is effectively free capacity.
Usually yes, but not always immediately. The match is the highest-priority dollar because it is an instant guaranteed return — a 50% match on the first 6% of pay is a 50% return on that money before any investment growth. Beyond the match, the honest comparison is against your alternatives. Credit card debt at 22% reliably beats an uncertain market return, so clearing it first is rational. No emergency fund is also a strong reason to pause: without one, a car repair becomes credit card debt or a 401(k) loan. Once high-interest debt is gone and you hold a few months of expenses, contributing past the match is usually the best available use of the money.
A common benchmark suggests roughly 1× your salary saved by 30, 3× by 40, 6× by 50, 8× by 60, and 10× by 67. These are rules of thumb built on assumptions about retirement age, spending, and Social Security — not requirements, and not personalised. Their real value is directional: if you are meaningfully behind, the fix is raising your contribution rate now, because the variable you control is what you save rather than what the market returns. Being behind at 40 is common and recoverable; being behind at 60 leaves fewer options, which is precisely why the benchmarks are worth glancing at early.
A traditional 401(k) contribution lowers your income tax but not your Social Security and Medicare tax. The contribution is excluded from the wages your income tax is computed on, so in the 22% bracket a $200 contribution reduces your take-home by roughly $156 rather than the full $200. But it is still included in your FICA wages, so you pay the full 7.65% on it regardless. A Roth 401(k) works in reverse — no deduction now, tax-free qualified withdrawals later. HSA contributions through payroll are the ones that escape both income tax and FICA.
Higher than the standard advice, and the arithmetic is unforgiving. Compounding does most of the work over 30 to 40 years, so starting at 45 means you are buying growth with contributions rather than time. Many people in that position need 20–25% of gross pay to reach a comparable outcome. Three levers help: the age-50 catch-up ($8,000 in 2026, rising to $11,250 for ages 60–63), directing every raise straight into the contribution rate so your take-home never drops, and continuing to work a few years longer, which shortens the retirement being funded while lengthening the funding period. Starting late is much better than not starting.
You can exceed the IRS limit, and it is worth avoiding. Deferring more than $24,500 in 2026 creates an excess deferral that must be withdrawn by the following April 15 or it is taxed twice — once in the year contributed and again when distributed. This happens most often to people who change jobs mid-year, because each employer tracks only its own plan and neither sees your combined total. If you switched employers, add the deferrals from both W-2s and check. There is also a softer version of contributing 'too much': funding a 401(k) heavily while carrying 22% credit card debt or holding no emergency savings is legal, but usually not the best use of the dollar.

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