How this estimate works
Compares the marginal current-paycheck effect of Roth and traditional contributions under the rates entered.
2026 planning tool
Roth vs. Traditional 401(k) Paycheck Calculator
Compare the estimated paycheck cost of Roth and traditional 401(k) contributions.
Important limitations
This calculator is an educational estimate. Actual results depend on the taxpayer, employer plan, payroll system, and facts not entered.