401(k) Calculator

Estimate your 401(k) balance at retirement. See how contributions, employer match, and investment returns grow over time.

$

Your current 401(k) account balance.

$

Your current annual gross salary.

%

Percentage of salary you contribute to 401(k). Max is $23,000 in 2024 ($30,500 if 50+).

%

Employer match as percentage of your contribution (e.g., 50% means they add 50 cents per dollar you contribute).

%

Maximum percentage of salary the employer will match on.

Number of years until you plan to retire.

%

Expected average annual investment return.

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How Your 401(k) Grows Over Time

A 401(k) grows through three mechanisms: your contributions, employer matching contributions, and investment returns that compound tax-deferred. An employee contributing 6% of a $75,000 salary with a 50% employer match adds $6,750 per year to their account. At a 7% average annual return, this grows to approximately $680,000 over 30 years, with investment earnings accounting for more than half of the total balance.

Understanding Employer Match

An employer match is essentially free money added to your retirement account based on your own contributions. The most common match formula is 50% of your contribution up to 6% of salary, but formulas vary widely between employers. If you earn $75,000 and contribute 6% ($4,500), a 50% match adds $2,250 annually. Not contributing enough to capture the full match is equivalent to declining a guaranteed 50% return on your money.

401(k) Contribution Limits

The IRS sets annual limits on 401(k) contributions that are adjusted periodically for inflation. For 2024, employees under 50 can contribute up to $23,000, while those aged 50 and older can add an extra $7,500 in catch-up contributions for a total of $30,500. The combined limit including employer contributions is $69,000 ($76,500 for 50+). Contributing the maximum allowed accelerates retirement savings, especially in later career years when earnings tend to be highest.

Traditional vs Roth 401(k)

A traditional 401(k) uses pre-tax contributions that reduce your current taxable income, but all withdrawals in retirement are taxed as ordinary income. A Roth 401(k) uses after-tax contributions, meaning no immediate tax break, but qualified withdrawals in retirement are completely tax-free. If you expect your tax rate to be higher in retirement than it is now, the Roth option often provides greater lifetime value. Many financial planners recommend contributing to both types for tax diversification.

Frequently Asked Questions