How Much Should I Contribute to My 401(k)? The Percentage That Fits
Figures checked October 28, 2026 against primary sources
There is no single right percentage, but there is a sensible order. First contribute enough to collect your employer's full match, because skipping it means turning down part of your pay. Then raise your rate, a point or two at a time, toward about 15% of your pay counting the match. That 15% figure is Fidelity's guideline, and Vanguard recommends that plans with automatic increases let workers reach 15% or more including employer money. This page shows where those numbers come from, what the typical worker actually saves, and what each percentage means in dollars.
The Short Answer
- At minimum, contribute what it takes to get the full match. In Vanguard's 2026 data, the median plan required a 6.0% deferral to max out the match (average 6.4%).
- Then aim for about 15% of pay, including the match. Fidelity suggests "at least 15% of your pre-tax income each year, which includes any employer match."
- The typical saver is below that. The average participant deferred 7.6% of pay in 2025 (median 6.6%); with employer money, the average total was 12.1%.
- You can put in up to $24,500 of your own pay in 2026, plus $8,000 if you are 50 or older, or $11,250 instead if you are 60 to 63.
- Starting late or retiring early means saving more than 15%; a pension may mean you can save less.
Step 1: Contribute Enough to Get the Full Match
Most 401(k) matches are a percentage of what you put in, up to a cap stated as a percentage of your pay. If you contribute less than the cap, you get less match. Vanguard's How America Saves 2026, which covers more than 1,300 plans it administers, reports:
| Match measure (2025 plan data) | Average | Median |
|---|---|---|
| Value of the promised match, as a share of pay | 4.7% | 4.0% |
| Your own deferral needed to get the full match | 6.4% | 6.0% |
To find your number, look up your plan's match formula in the summary plan description or your benefits portal, then find the deferral rate where the match stops growing:
- 50% on the first 6% of pay (the most common single formula in Vanguard's data): contribute 6%, get 3%.
- 100% on the first 3%, then 50% on the next 2% (the IRS safe harbor basic formula): contribute 5%, get 4%.
- 100% on the first 6%: contribute 6%, get 6%.
A quick hypothetical: on a $60,000 salary with a 50%-on-6% match, contributing 3% instead of 6% leaves $900 a year of match unclaimed. Check, too, whether your plan matches each paycheck or adds a year-end "true-up"; if it matches per paycheck and you hit the annual limit early, you can miss match in the last months. Our average 401(k) match guide covers formulas, vesting and safe harbor plans in detail.
Step 2: Work Toward 15% of Pay
Once you have the match, the common target is a total savings rate of around 15% of pay. Two large plan providers point to that level:
- Fidelity suggests saving at least 15% of pre-tax income each year, including any employer match. Fidelity bases it on its estimate that most people need 55% to 80% of their pre-retirement income in retirement, and it assumes you save from age 25 to 67.
- Vanguard writes in How America Saves 2026 that plans using automatic increases should set the cap "at a level where participants are saving 15% or more, including employer contributions."
The 15% includes the match, so the part that comes from your paycheck is smaller. With the median 4% match, your own share is about 11%. With a 3% match, it is about 12%.
Adjust the target for your situation:
- Starting after your 20s or with little saved: 15% assumes saving from 25. Starting at 35 or 40 means a higher rate to reach the same place.
- Planning to retire before 67: fewer working years and more retired years both push the rate up. Fidelity says you will likely need more than 15% if you do not plan to work that long.
- A pension: guaranteed income lowers the share your savings must cover, so the rate can be lower.
- High-interest debt or no emergency fund: many people take the match first, deal with credit card debt and a basic cash cushion, then raise the 401(k) rate.
Savings outside the 401(k), such as an IRA, count toward the 15% too. To see what the target means as a final balance, use how much do I need to retire.
What Other Workers Actually Contribute
| Measure (2025, Vanguard-administered plans) | Figure |
|---|---|
| Average employee deferral rate | 7.6% of pay |
| Median employee deferral rate | 6.6% of pay |
| Average total contribution rate (employee + employer) | 12.1% |
| Median total contribution rate | 11.6% |
| Participants who saved the $23,500 maximum (2025 limit) | 14% |
| Participants earning over $150,000 who saved the maximum | 51% |
| Plan-weighted participation rate | 86% |
So the average participant, counting employer money, is about three points short of 15%. These are Vanguard's clients only, not every US plan. For balances rather than rates, see average 401(k) balance by age.
What Each Percentage Means in Dollars
Hypothetical, before any employer match. Your own contribution per year at common rates:
| Salary | 3% | 6% | 10% | 15% | 10% per biweekly paycheck | Rate that reaches $24,500 |
|---|---|---|---|---|---|---|
| $40,000 | $1,200 | $2,400 | $4,000 | $6,000 | $153.85 | 61.3% |
| $60,000 | $1,800 | $3,600 | $6,000 | $9,000 | $230.77 | 40.8% |
| $80,000 | $2,400 | $4,800 | $8,000 | $12,000 | $307.69 | 30.6% |
| $100,000 | $3,000 | $6,000 | $10,000 | $15,000 | $384.62 | 24.5% |
| $150,000 | $4,500 | $9,000 | $15,000 | $22,500 | $576.92 | 16.3% |
A pre-tax contribution costs you less take-home pay than its face value, because it lowers your taxable wages for federal income tax (Social Security and Medicare taxes still apply). A worker in the 12% bracket who puts in $100 sees take-home pay fall by roughly $88 before state tax. Above about $163,000 of salary, 15% of pay is more than the $24,500 limit, so high earners reach the cap before the rate; employer money still counts toward 15%.
What 1 Percentage Point More Is Worth
Hypothetical illustration. Raising your rate by one percentage point and keeping it there for 30 years, assuming a 6% annual return, a flat salary and one deposit at the end of each year, with no fees or taxes:
| Salary | Extra 1% per year | Added over 30 years | Of which your contributions |
|---|---|---|---|
| $40,000 | $400 | $31,623 | $12,000 |
| $60,000 | $600 | $47,435 | $18,000 |
| $80,000 | $800 | $63,247 | $24,000 |
| $100,000 | $1,000 | $79,058 | $30,000 |
This is why automatic annual increases work: a one-point raise each year is hard to notice in a paycheck, especially if it lines up with a pay raise, and over a career it adds up to a meaningfully larger balance. Many plans let you schedule the increase yourself even if you were not auto-enrolled.
The 2026 Limits That Cap Your Percentage
| 2026 limit (IRS Notice 2025-67) | Amount |
|---|---|
| Your own contributions (elective deferrals) | $24,500 |
| Catch-up, age 50 or older | +$8,000 (total $32,500) |
| Catch-up, ages 60, 61, 62 or 63 (instead of $8,000) | +$11,250 (total $35,750) |
| Everything into the account (you + employer) | $72,000 |
One new rule for high earners: if your 2025 FICA wages from the employer sponsoring the plan were over $150,000, your 2026 catch-up contributions must go in as Roth (after-tax). The $24,500 base amount is not affected. Our 2026 401(k) contribution limits guide explains how the catch-ups stack.
If You Were Auto-Enrolled
If your employer signed you up automatically, your rate was picked for you, and it is often below 15%. In Vanguard's 2025 data, 61% of plans used automatic enrollment, and 32% of those started workers at 3%. Another 62% defaulted at 4% or more, and 31% at 6% or more. Automatic enrollment works for participation, with 94% of eligible workers saving in auto-enroll plans against 64% in plans where workers must sign up.
The SECURE 2.0 Act (section 101, which added section 414A to the tax code) requires most new 401(k) and 403(b) plans to auto-enroll for plan years beginning after December 31, 2024. Under the statute, the default must be:
- Not less than 3% and not more than 10% of pay in the first year, and
- raised by 1 percentage point each year until it reaches at least 10%, but not more than 15%,
- unless you choose a different rate or opt out.
Plans set up before December 29, 2022 (the law's enactment date), SIMPLE 401(k)s, governmental and church plans, businesses less than 3 years old and employers that normally have 10 or fewer employees are exempt. The default is a starting point, not a recommendation: a 3% default may be below what you need for the full match, so check it against your plan's formula.
Traditional or Roth 401(k)?
Deciding how much and deciding which type are separate choices. In Vanguard's data, 98% of plans offered a Roth option at year-end 2025, and 18% of participants in those plans used it.
- Traditional (pre-tax): contributions come out before income tax, so they cost less take-home pay today. Withdrawals in retirement are taxed as ordinary income.
- Roth: contributions are after tax. Per the IRS, withdrawals of contributions and earnings are not taxed if the account has been held at least 5 years and you are 59½ or older (or disabled, or the payment is after death).
The rough rule: Roth tends to win if you expect a higher tax rate in retirement than now, which is common early in a career; traditional tends to win if you are in a high bracket now. You can split between the two, but the $24,500 limit covers both combined. A Roth contribution of the same percentage puts more after-tax money away, so 10% Roth is a bigger commitment than 10% traditional. See Roth 401(k) vs Roth IRA for how the accounts compare.
401(k) Calculator
Enter your salary, contribution rate and your plan's match to see how your balance could grow. Try your current rate, then the rate that gets the full match, then 15% including the match. The full version is on our 401(k) calculator page.
Sources & Methodology
- Vanguard, How America Saves 2026 (PDF): match values, deferral needed for the full match, deferral and total contribution rates, participation, automatic enrollment defaults, Roth use. Plan data as of December 31, 2025.
- Fidelity, How much should I save for retirement?: the 15% guideline and its assumptions.
- IRS Notice 2025-67: 2026 deferral and catch-up limits and the Roth catch-up wage threshold.
- 26 U.S.C. 414A (added by SECURE 2.0 Act section 101, Pub. L. 117-328): automatic enrollment requirements, exceptions and effective date.
- IRS, Operating a 401(k) plan: safe harbor matching formula.
- IRS, Roth comparison chart: tax treatment of Roth and pre-tax contributions and qualified distributions.
Vanguard's figures cover plans it administers, not the whole market, and some 2025 values are estimates. The dollar tables and the 30-year illustration are our own arithmetic with the stated assumptions. The 15% figure is a guideline from Fidelity and Vanguard, not a legal or IRS standard.
FAQ
What percentage should I contribute to my 401(k)?
At least enough to get your employer's full match (6% of pay in the median Vanguard plan), and ideally about 15% of pay including the match. If 15% is out of reach now, raise your rate by a point each year.
Is 10% in a 401(k) enough?
With a typical match of 4% to 5%, a 10% contribution puts you at 14% to 15% total, close to the common 15% guideline. Without a match, or if you started late, 10% is likely short.
Does the 15% include my employer match?
Yes. Fidelity's guideline is 15% of pre-tax income including any employer match, and Vanguard's 15% recommendation also counts employer contributions.
What percentage of income should go to retirement?
About 15% of gross pay is the common guideline for someone starting in their 20s and retiring around 67. Starting later or retiring earlier calls for more; a pension can mean less.
Should I max out my 401(k)?
If you can afford it after an emergency fund and high-interest debt, maxing out ($24,500 in 2026) is a strong move, but few do: 14% of Vanguard participants saved the maximum in 2025. For most people the priority is the full match first, then 15% total.
What is the default contribution if I was auto-enrolled?
It depends on your plan. In Vanguard's data, 32% of auto-enroll plans default at 3%. New plans covered by SECURE 2.0 must start between 3% and 10% and add 1 point a year until at least 10%.
Should I contribute to a 401(k) or pay off debt first?
Many people do both: contribute enough for the full match, put extra money toward high-interest debt such as credit cards, and raise the 401(k) rate once that debt is gone.
This article is for general information and is not financial, investment or tax advice. Plan statistics are from Vanguard's How America Saves 2026, the savings guideline from Fidelity, and limits and rules from the IRS and the U.S. Code, all read on 2026-10-27. Dollar tables and growth figures are hypothetical and assume a 6% return that is not guaranteed. Check your own plan's documents for its match formula and options.
