How this estimate works
Applies the 2026 employee-deferral limit, age-based catch-up limits, and the Roth-only catch-up boundary when applicable.
2026 planning tool
401(k) Contribution and Paycheck Calculator
Compare how current and proposed 401(k) contributions may affect one paycheck and long-term savings.
Important limitations
This calculator is an educational estimate. Actual results depend on the taxpayer, employer plan, payroll system, and facts not entered.