401(k) Decision Tools
Understand your 401(k) by experimenting with it. Calculate contributions, employer match, loans, early withdrawals, and growth projections — all running privately in your browser.
Contribution Calculator
How much should you contribute? See tax savings and projections.
Employer Match Calculator
How much free money is your employer match worth?
Loan Calculator
What does a 401(k) loan really cost including opportunity cost?
Early Withdrawal Calculator
What does an early withdrawal really cost after penalties and taxes?
Growth Calculator
Project your 401(k) balance over time with compounding.
Withdrawal Duration Calculator
How long will your savings last with a given annual withdrawal?
2026 Contribution Limits
401(k) limits, catch-up, and super catch-up for 2026.
401(k) vs Roth IRA
Which should you prioritize? Compare limits, match, and tax treatment.