TopToolsAiProject how much your 401(k) retirement savings could grow to by retirement age, based on your current balance, contributions, and expected annual return. Starting at age 30 with a $10,000 balance, contributing $500 a month, and earning an average 7% annual return, a 401(k) could realistically grow to well over $1 million by age 65 — almost all of that growth coming from decades of compounding, not the contributions themselves.
Last updated: 1 Sep 2026
How to use USA 401(k) Retirement Calculator
- Enter your current 401(k) balance and monthly contribution.
- Enter your employer match percentage, years to retirement, and expected annual return.
- Click "Project Balance" to see your estimated balance at retirement.
Frequently asked questions
Does this include employer matching?
Include your employer's match as part of your monthly contribution figure for a more complete projection.
What return rate should I assume?
A commonly used long-term average for diversified stock investments is around 7-8% annually, though actual returns vary and aren't guaranteed.
What is the annual contribution limit?
The IRS sets a yearly contribution limit that's adjusted periodically for inflation — check the current year's limit to make sure your monthly plan stays within it.
Are 401(k) withdrawals taxed?
Traditional 401(k) withdrawals in retirement are taxed as ordinary income; Roth 401(k) withdrawals are typically tax-free if requirements are met — this projection doesn't account for tax at withdrawal.
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