Reckon

Ledger No. 20

Twenty quick tools for everyday money math — no sign-up, figures shown as you type.

Compound Interest Calculator

See how an investment grows with regular contributions and compounding interest.

How this is calculated

Compounds monthly: each month's balance earns interest, then that month's contribution is added before the next month's interest is calculated. The annual return is a simplified constant rate — real markets and interest-bearing accounts fluctuate year to year, so treat this as a planning estimate, not a guarantee.