How Much Should You Contribute to Your 401(k)?
The standard advice — 15% of pre-tax income — is a useful default but ignores the most important rule: capture every dollar of employer match before doing anything else with retirement savings. After that, the contribution rate depends on your age, current savings position, and competing goals like paying off high-APR debt or saving for a house.
Use the calculator
401(k) Calculator
Step-by-step
- 1
Get the full employer match — always
A typical 6% employer match (50% of first 6% you contribute) is roughly $5,400/year on a $90K salary. Missing this match for 5 years costs $27,000 in direct contributions plus $30,000+ of compounding by retirement. This is the single highest-return move in personal finance — a 50% guaranteed return on the year-1 contribution.
- 2
Aim for 15% of gross including match
Common Fidelity guideline: total retirement savings rate (employee + employer) should reach 15% of gross income. If your employer matches 5%, your personal contribution should be ~10%. If they match 3%, your personal contribution rises to ~12%. Match-only is rarely enough — 3–6% from employer alone produces $200K–$400K at retirement on a $90K salary, well below typical needs.
- 3
Know the 2026 contribution limits
$23,500 employee contribution limit ($30,500 with catch-up if 50+). Plus $7,500 super-catch-up for ages 60–63 starting in 2026. Plus another $1,000 if you participate in a SIMPLE 401(k). Plus employer contributions count separately, with the total all-source limit of $70,000 ($77,500 if 50+).
- 4
Adjust based on your savings position
On track (1× salary by 30, 3× by 40, 6× by 50): keep at 15%. Behind by 1–3 years: bump to 18–20%. Behind by 5+ years: push to 25%+ if cash flow allows. Way ahead of schedule: can drop to 12–13% to free cash for other goals (mortgage payoff, kids' college, taxable brokerage).
- 5
Compare 401(k) to IRA priority
Standard order: (1) 401(k) up to employer match, (2) max IRA ($7,000 in 2026, $8,000 if 50+), (3) max HSA if you have a high-deductible plan, (4) return to 401(k) for additional contributions up to the limit. Exception: if your 401(k) plan has only high-fee actively-managed funds, skip past it for IRA before returning.
- 6
Pick traditional vs Roth on the 401(k)
Same logic as IRA. If you expect a higher tax bracket in retirement than now (young, high career trajectory, or high-savers), go Roth 401(k). If you expect a lower retirement bracket (mid-to-late career, peak earnings now), go traditional. Many plans now allow split contributions — half traditional, half Roth — for tax diversification.
- 7
Increase contribution by 1% each year
Most 401(k) platforms support automatic annual increases. Set a +1% per year escalator until you hit your target rate. The behavioral evidence is strong — auto-escalation pushes employees from 6% starting rates to 12–15% over 6–9 years without any lifestyle pain.
💡 Tips
- After-tax contributions to a 401(k) (different from Roth contributions) plus an in-service rollover can create a "mega backdoor Roth" — up to $46,500 of additional Roth space per year. Only available in plans that support both features; check your summary plan description.
- When you change jobs, do NOT cash out the 401(k). The 10% penalty + ordinary income tax + lost compounding makes this one of the worst financial moves available. Roll into the new employer plan or an IRA.
- Some employers vest match contributions over 3–6 years. Check your vesting schedule before assuming the match is fully yours; leaving early can forfeit a meaningful portion.
FAQ
What if I cannot afford 15%?
Start with whatever captures the employer match. Even 3–6% with match is meaningful. Then increase 1% per year (most platforms automate this). The math compounds — going from 6% to 12% over 6 years adds substantially more than the simple percentage suggests because of compounding on the higher rate years.
Is it better to put money into 401(k) or pay off student loans?
Match always wins (50% return beats most loan rates). After match, compare your highest student loan APR to expected market returns. Federal loans at 5–7% are usually beat by 401(k) returns over 30 years; private loans at 9–12% are closer to a coin flip. High-balance high-APR private loans usually deserve attack first; lower-rate federal loans can stay on schedule while you build retirement.
Can I contribute too much to my 401(k)?
Yes — exceeding the IRS limit ($23,500 in 2026) creates "excess contributions" subject to 6% annual penalty until withdrawn. If you have multiple 401(k)s in one year (job change), the limit applies across all of them combined. Most plans block contributions once you hit the limit, but if you participate in two unrelated plans the burden is on you.
When should I increase my 401(k) contribution?
On every raise, immediately. Increase the contribution rate by enough to keep your take-home pay flat (or rising slightly). This is the single behavioral trick that produces above-average retirement balances — your standard of living tracks the salary you actually see, not what you contribute.
What is the average 401(k) contribution rate?
About 7.4% employee + 4.5% employer = 11.9% combined (Vanguard 2026 How America Saves). Below the 15% target. People who reach the 15%+ target tend to be early starters who escalated annually rather than late starters making large lump-sum increases.