Retirement planning spans decades and multiple account types at once — a 401(k) with an employer match, an IRA with its own contribution limit, Social Security with a claiming-age decision that's hard to undo, and a target number that's easy to guess wrong in either direction.

This section collects every free retirement calculator on the site: 401(k) and IRA growth projections, pension estimates, Social Security claiming-age comparisons, a goal-based savings calculator, a FIRE number finder, RMD calculations, and annuity payouts — all using 2026 IRS contribution limits and figures, updated as new guidance is released.