Retirement Calculators
401(k) Calculator
Project a workplace retirement balance from your contributions, any employer match and an expected rate of return.
Projected balance at retirement
$1,420,809
- Total contributed
- $405,000
- Investment growth
- $1,015,809
- Employer contributions
- $108,000
How this calculator works
Balance grows monthly: balance × (1 + r) + contributions
- r
- the monthly return derived from the annual figure
- contributions
- your payments plus any employer contribution
Example calculation
Illustrative example — not advice
Worked example — the 401(k) calculator as it loads, using the default figures below.
- 01Enter current age: 35.
- 02Enter retirement age: 65.
- 03Enter current balance: $45,000.
- 04Enter your monthly contribution: $700.
- 05Enter employer contribution: $300.
- 06Enter expected annual return: 6.5%.
- 07Read the projected balance at retirement from the results panel: $1,420,809.
Projected balance at retirement: $1,420,809. Total contributed: $405,000. Investment growth: $1,015,809. Employer contributions: $108,000.
These figures come straight from the calculator above running on the values listed, so you can retype them and confirm every number yourself. Change any input and the results update immediately. Illustrative only — not a quote, offer or recommendation.
Important considerations
- Annual contribution limits and tax rules apply and change over time.
- Returns are assumed constant; real outcomes vary year to year.
Related calculators
- Retirement CalculatorProject your retirement balance and the income it could sustain.
- IRA CalculatorTraditional IRA balance at retirement.
- Retirement Savings CalculatorCombined retirement savings projection.
- FIRE CalculatorYour FIRE number and years to reach it.
- Roth IRA CalculatorRoth IRA balance from after-tax contributions.
- Social Security Benefit CalculatorEstimated benefit and the effect of claiming age.
Terms used here
Frequently asked questions
Is the employer match worth maximising?
Almost always. A match is an immediate return on your contribution that nothing else reliably matches.
Disclaimer
Legamoney calculators are educational tools. Results are estimates based on the figures you enter and do not constitute financial, tax or legal advice.
Last reviewed 2026-08-01