401(k) Calculator

Forecast your 401(k) balance with employer matching.

Formula & Methodology

Balance = current savings compounded at the assumed return plus the future value of monthly contributions, including employer match.

Worked Example

$20,000 starting balance, $300/month contributions, 4% employer match, and 7% return over 30 years projects to over $500,000.

Frequently Asked Questions

How does employer matching work?

Employers often match contributions up to a percentage of your salary. That match is free money and should be captured in full whenever possible.

What return rate should I use?

A 6–7% long-term average is realistic for a diversified portfolio. Avoid assuming double-digit returns for planning.

Does this account for contribution limits?

No. The IRS sets annual contribution limits that this calculator does not enforce, so keep limits in mind when entering your monthly contribution.

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