401(k) contribution calculator

What does contributing actually cost you?

A traditional contribution comes out before federal income tax, so the money leaving your paycheck is smaller than the money reaching your 401(k). This runs both paychecks through the same 2026 engine and reports the difference, rather than assuming a marginal rate.

Your paycheck

Set your contribution

2026 rules

50% of every dollar you put in, up to 6% of your pay.

Include other benefits Optional

What it costs your paycheck

$142.40

to put $196.15 into retirement every check

Tax deferred per check$53.75
Employer match per check$98.08
Into your 401(k) per year$7,650
72.6% of every dollar saved comes out of take-home

A traditional contribution comes out before federal income tax, so $196.15 of savings costs you $142.40. It is still Social Security and Medicare wages, which is why it never costs nothing.

Both paychecks are run through the same deterministic 2026 engine and the difference is the cost — no marginal rate is assumed. New York state rules are applied; local taxes remain excluded. Investment growth is not projected.

Rate by rate

What each contribution level costs you.

Take-home given up against total retirement money, including the match.

0% of pay$0.00take-home per check

$0 saved per year

3% of pay$71.20take-home per check

$3,825 saved per year

6% of pay$142.40take-home per check

$7,650 saved per year

10% of pay$237.33take-home per check

$11,050 saved per year

15% of pay$356.01take-home per check

$15,300 saved per year

The 2026 elective-deferral limit is $24,500. Catch-up contributions, after-tax contributions, and plan-specific limits are not modelled. How these numbers are produced →