401(k) Contribution Calculator
See your projected 401(k) balance, employer match, and take-home pay impact
How 401(k) Growth Is Projected
FV = Balance × (1+r)ⁿ + MonthlyContrib × ((1+r)ⁿ − 1) / r
Where r = monthly return rate, n = months until retirement, contributions are compounded monthly
Guide
How it works
A 401(k) is an employer-sponsored retirement savings plan that lets you contribute pre-tax dollars, reducing your taxable income today. Your investments grow tax-deferred until withdrawal in retirement. Many employers offer a matching contribution — free money that dramatically accelerates your balance.
The 2025 IRS contribution limit is $23,500 (under 50) or $31,000 (50 and older, including $7,500 catch-up). The tax savings shown assume a 22% federal marginal rate — your actual savings depend on your specific tax situation.
How much should I contribute to my 401(k)?expand_more
At minimum, contribute enough to capture your full employer match — that's an immediate 50–100% return. Beyond that, aim for 10–15% of your salary including the match. Max out if you can.
What is an employer match?expand_more
An employer match means your employer contributes to your 401(k) based on what you contribute, up to a limit. A common structure is '50% match on up to 6% of salary' — meaning if you put in 6%, your employer adds another 3%.
What is the 2025 contribution limit?expand_more
For 2025, you can contribute up to $23,500 to a 401(k). If you are 50 or older, the catch-up contribution limit brings the total to $31,000.
Traditional vs Roth 401(k)?expand_more
A traditional 401(k) reduces your taxes now (pre-tax contributions). A Roth 401(k) uses after-tax dollars but grows and withdraws tax-free. The better option depends on whether you expect to be in a higher or lower tax bracket in retirement.
Next steps