Last updated: March 2, 2026

How Does a 401k Calculator Work?

Formula

A 401k calculator projects your retirement balance based on salary, contribution rate, employer match, and investment returns.

Employer matching is essentially free money — always contribute enough to get the full match.

Common use cases:

  • Maximizing employer match
  • Planning retirement contributions
  • Projecting 401k growth

Frequently Asked Questions

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