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How a 401(k) employer match works

Updated October 27, 2026 · 6 min read

An employer match is money your company adds to your 401(k) when you contribute. It is part of your pay, but you only get it if you put in enough yourself.

Key points

  • The most common formula is 50 cents per dollar on the first 6% of pay.
  • On a $64,000 salary, that match is worth $1,920 a year.
  • Contributing only 3% leaves $960 a year on the table, about $90,700 after 30 years at 7%.

What the formula means

Match formulas have two parts: how much the company adds per dollar you save, and the share of your pay it matches up to. Vanguard's How America Saves 2026 report found the most common formula is 50 cents per dollar on the first 6% of pay.

That means if you contribute 6% of your salary, your employer adds another 3%. Contribute more than 6% and the match stays at 3%. Contribute less and the match shrinks with you.

The same formula in dollars

Here is a $64,000 salary, close to the median for a full-time U.S. worker, under the 50%-of-6% formula:

You contributeYour dollars a yearEmployer match a yearMatch you miss
3% of pay$1,920$960$960
6% of pay$3,840$1,920$0
10% of pay$6,400$1,920$0

Missing $960 a year sounds small. Invested for 30 years at a 7% yearly return, those missed contributions would have grown to about $90,700. Claiming the full $1,920 a year grows to about $181,400 on its own, before counting a single dollar of your own money.

Other formulas you might see

Your plan's summary plan description or benefits portal lists the exact formula.

A real example from a Puerto Rico employer

One large employer's 2026 Puerto Rico savings plan matches dollar for dollar on the first 3% of pay, then one-third on the next 3%, for a maximum match of 4%:

You contributeCompany addsTotal going in
3% of pay3%6%
4% of pay3.33%7.33%
5% of pay3.67%8.67%
6% of pay or more4%10% or more

On a $64,000 salary, contributing 6% ($3,840) brings in $2,560 a year from the company. Two details in that plan are common elsewhere too: the match is figured each paycheck, with no year-end top-up mentioned, and pre-tax contributions stop automatically at Puerto Rico's $15,000 limit. A high earner contributing a large percentage could hit $15,000 before December and lose the match for the rest of the year. That plan also matches after-tax contributions, which keeps the match going.

Vesting: when the match is really yours

Your own contributions are always yours. The employer's match may follow a vesting schedule, where you earn ownership over time, often over three to six years. If you leave before you are fully vested, you can lose part of the match. The calculator assumes the full match is yours right away, so check your plan's schedule if you might change jobs.

Limits for 2026

The IRS limit for your own 401(k) contributions in 2026 is $24,500, plus an $8,000 catch-up if you are 50 or older and $11,250 instead if you are 60 to 63. Employer matches don't count toward your $24,500, but everything together can't exceed $72,000.

In Puerto Rico: plans qualified only under the Puerto Rico tax code have a lower limit of $15,000, with a $1,500 catch-up at 50. Plans qualified in both Puerto Rico and the U.S. that adopted the special limit allow up to $22,500. Our Puerto Rico retirement guide covers the details.

How to make sure you get it all

  1. Find your plan's match formula and vesting schedule.
  2. Set your contribution to at least the percentage that earns the full match.
  3. If your plan spreads the match per paycheck, avoid hitting the yearly limit early; some plans "true up" at year end, others don't.
  4. Raise your rate by 1% each year or with each raise until you reach your savings goal.

Sources

For education only, not financial, tax or legal advice. Rules and limits change; check the sources and talk with a licensed professional about your own situation.