How the 401(k) calculator works
For 2026 you can put up to $24,500 of your pay into a 401(k). If you are 50 or older you can add $8,000 more, and ages 60 to 63 can add $11,250 instead. Traditional 401(k) contributions come out before income tax, so they lower your tax bill this year.
The projection adds your contributions and employer match at the end of each year and assumes a steady return with no pay raises. Real returns go up and down, and this is not investment advice. It assumes a traditional (pre-tax) 401(k); Roth contributions do not lower tax today.