US: First paycheck · 5 min read
How does a 401(k) match work, and how much should I contribute?
How an employer 401(k) match works in the US: common formulas, vesting, the 2026 limit of $24,500, traditional against Roth and how much a new grad should put in.
The short answer
A 401(k) match is money your employer adds to your retirement account when you contribute, under a formula such as 100% of the first 3% of pay plus 50% of the next 2%, which is the most common design and works out to 4% of salary if you contribute 5%. The average promised match is about 4.6% of pay, according to Vanguard's How America Saves. Your own contributions are always yours; the employer's may vest over time, meaning you keep them only after a set number of years, up to three for cliff vesting or six for graded. The 2026 employee contribution limit is $24,500. At a first job, contribute at least enough to get the full match, which is an immediate 50 to 100% return, and more if you can; a Roth 401(k), if offered, is usually the better choice when your tax rate is low.
Key takeaways
- Contribute at least enough to capture the full match. Leaving it is turning down part of your pay.
- Common formula: 100% of the first 3% plus 50% of the next 2%. Contribute 5%, get 4% free.
- Vesting: your money is always yours; the match may take up to 3 years (cliff) or 6 years (graded) to become fully yours.
- 2026 limit on your contributions: $24,500. Roth 401(k) is usually better early in a career when your tax bracket is low.
On this pageCommon match formulas
Common match formulas
| Formula | What you contribute to get it all | Employer adds |
|---|---|---|
| 100% of the first 3%, 50% of the next 2% | 5% ($3,000) | 4% ($2,400) |
| 100% up to 4% | 4% ($2,400) | 4% ($2,400) |
| 50% up to 6% | 6% ($3,600) | 3% ($1,800) |
| 100% up to 6% | 6% ($3,600) | 6% ($3,600) |
| Non-elective 3% (no contribution required) | 0% | 3% ($1,800) |
| No match | $0; still worth contributing for the tax benefit |
The 2026 rules
- Employee contribution limit: $24,500 for 2026, across traditional and Roth 401(k) combined.
- Combined employee plus employer limit: $72,000.
- Catch-up contributions apply from age 50; not relevant yet.
- Automatic enrollment is now required for most new plans, often at 3% rising 1% a year; check what you've been defaulted into.
- Vesting of employer money: cliff within three years or graded within six, by law. Your contributions are always 100% vested.
Why the match comes first
A 100% match is a 100% return on the day you contribute, before any market growth. No other use of money, including paying down student loans at 6%, comes close. The order most planners suggest for a first paycheck: contribute enough to get the full match, build an emergency fund of three months' expenses, pay down any debt above about 6%, then raise retirement contributions toward 15%. Vanguard reports that the average participant deferral rate is around 7.7%, and that plans with automatic escalation see people reach double digits without noticing.
What to do in your first week
- Find the plan documents or ask HR: the match formula, the vesting schedule, and when eligibility starts (sometimes day one, sometimes after 90 days or a year).
- Set your contribution to at least the match cap. If you were auto-enrolled at 3% and the match needs 5%, raise it.
- Choose Roth if offered and your salary is under about $100,000; traditional otherwise, or split.
- Pick a target-date fund matching your expected retirement year unless you have a reason not to. Low cost, diversified, rebalanced for you.
- Turn on automatic annual increases of 1% if the plan offers them.
Illustrative example: the 2% that cost $1,200 a year
A new hire on $60,000 is auto-enrolled at 3% and never looks again. Her employer matches 100% of the first 3% and 50% of the next 2%. By contributing 3% she gets $1,800 of match; by contributing 5% she'd get $2,400. The missing $600 of match, plus the $1,200 she'd have saved herself, compounds for forty years. When she finally raises it in year three, the first two years' gap is roughly $25,000 at retirement.
Questions people ask
- What does "100% match up to 4%" mean?
- If you contribute 4% of your salary, your employer adds the same amount. If you contribute 2%, they add 2%. If you contribute 8%, they still add 4%, because that's the cap. On a $60,000 salary, contributing 4% ($2,400) gets you another $2,400 from the employer. Contributing less than the cap leaves money unclaimed.
- What is vesting and does it matter if I might leave?
- Vesting is the schedule on which employer contributions become yours to keep. Cliff vesting means nothing until a date (up to three years), then everything. Graded vesting means a percentage each year, fully vested within six. If you leave before you're vested, you forfeit the unvested employer money, never your own. If you expect to leave within two or three years, the vesting schedule is part of the offer's real value.
- Should I choose traditional or Roth 401(k)?
- Traditional contributions reduce your taxable income now and are taxed when withdrawn. Roth contributions are taxed now and withdrawn tax-free. Early in a career, when your income and tax rate are likely lower than they'll be later, Roth usually wins. If you're in the 22% bracket or higher and expect lower income in retirement, traditional may win. Employer matches go into the traditional side regardless.
- How much should I contribute to my 401(k) at 22?
- At minimum, enough to get the full match. A common target is 10 to 15% of salary including the match, which many people reach by starting at the match and raising contributions one percentage point each year or with each raise. Money invested at 22 has forty-plus years to compound; a dollar then is worth several at 65.
Exercises are practice, not evidence of career fit or a qualification. How to read our guides and report a correction.
Sources
- 401(k) and profit-sharing plan contribution limits · Internal Revenue Service
- How America Saves 2026 · Vanguard
How this page is written
Sources support the factual background, not a guarantee that an exercise predicts career fit. Fictional practice material is labelled. Dates record content updates; no independent expert review is implied. More about OffLadder.