401(k) Calculator

See how much your 401(k) could grow by retirement — and whether you're leaving free employer match money on the table.

How employer matching works

Many employers add money to your 401(k) when you contribute. A common formula is "50% match up to 6% of pay": if you earn $60,000 and contribute 6% ($3,600), your employer adds 50% of that, or $1,800. If you contribute only 3%, you get only $900 — the other $900 is simply lost. That's why a common rule of thumb is to contribute at least enough to get the full match.

How this projection is calculated

Each year, the calculator adds your contribution and your employer's match in monthly installments, grows the balance at the annual return you choose, and raises your salary by the yearly raise. The result is shown in future dollars and does not account for inflation, fees or taxes. Try a lower return, such as 4% or 5%, to see a more conservative estimate.

Contribution limits

The IRS sets a maximum amount employees can contribute each year, and it usually rises with inflation. People aged 50 and over can make additional "catch-up" contributions. Check the current limits on IRS.gov or with your plan administrator — this calculator does not cap your contributions automatically.

Traditional vs. Roth 401(k)

With a traditional 401(k), contributions lower your taxable income now, and withdrawals in retirement are taxed. With a Roth 401(k), you contribute after-tax money and qualified withdrawals are tax-free. Many plans offer both; the right choice depends on whether you expect your tax rate to be higher now or in retirement.

Last reviewed November 14, 2026.