401K Calculator

Employer-sponsored 401(k) plans offer tax-advantaged retirement savings with optional employer match. Model current balance, salary, contribution...

Modify the values and click the Calculate button to use.
Results

Enter values and click Calculate.

Schedule

Related: Social Security CalculatorAnnuity CalculatorRetirement CalculatorPension Calculator

Introduction

Employer-sponsored 401(k) plans offer tax-advantaged retirement savings with optional employer match. Model current balance, salary, contribution percentage, match formula, and expected return to see future value at retirement.

401(k) Growth Projection

Employer-sponsored 401(k) plans offer tax-advantaged retirement savings with optional employer match. Model current balance, salary, contribution percentage, match formula, and expected return to see future value at retirement.

Employer Match

Match formulas vary: 50% up to 6%, dollar-for-dollar up to 4%, tiered structures, and more. Enter your plan's match tiers to capture free money—missing match is an immediate 100% forfeited return.

Contribution Limits

IRS annual deferral limits apply ($23,500 for under-50 in 2025, with catch-up for 50+). Highly compensated employees may face additional limits. This tool does not enforce IRS caps—verify with your plan administrator.

Traditional vs Roth 401(k)

Traditional deferrals reduce taxable wages now; Roth 401(k) uses after-tax dollars but qualified withdrawals are tax-free. Compare long-term outcomes with the Roth IRA Calculator and tax tools.

Read More

401(k) employer match guide. See also Retirement Calculator and IRA Calculator.

How It Works

  1. Enter your amounts, rates, and term in the form. Use the same units shown in the labels (dollars, years, percent).
  2. Click Calculate to run the 401K Calculator engine. Invalid or empty required fields show a clear error message.
  3. Review the summary cards for the key outputs. Expand schedules or tables when available for period-by-period detail.
  4. Copy, print, or share your scenario link. Reset the form anytime to start a fresh comparison.

Formula

Balance grows with monthly compounding of employee deferrals, employer match on salary up to the match limit, and salary increases. Early withdrawals face 10% penalty plus income tax unless exempt.

FAQ

Yes. CDCalculator.io provides the 401K Calculator at no charge for personal and educational use. Results are estimates and not financial advice.

The tool uses standard formulas lenders and planners use in spreadsheets. Your bank may round differently or include fees not modeled here.

Use the Copy Results and Print buttons on the calculator panel after you run a scenario. You can also share the page link with colleagues.

Focus on realistic rates, terms, and any extra payments or contributions. Small changes in APR or time horizon often move outcomes more than rounding.

No. Use this calculator to explore scenarios, then consult a qualified advisor or lender for decisions about retirement products.