How to use the annuity calculator
- Pick what to solve: payment, present value, or payment to reach a future value.
- Enter annual rate, years (converted to months), and known inputs.
- Ordinary (end) vs due (beginning) timing.
- All three outputs stay consistent for checking; copy link.
Ordinary vs due
End of period vs start of period—due has one extra compounding turn at the same nominal rate.
Related tools
Present value, future value, retirement calculator for multi-phase plans.
Frequently asked questions
End vs beginning of period?
End of period (ordinary): payments at period end. Beginning (due): payments at start—one extra compounding turn, so higher payouts or lower PV for the same inputs.
Which solve mode should I use?
Lump sum to payouts: solve payment with PV. Known payment to PV: solve present value. Target future value to required payment: solve for FV goal.
Annual or monthly rate?
Enter nominal annual percent; the tool converts to a monthly rate with monthly compounding.
Related to retirement calculators?
Retirement tools handle multi-phase save/withdraw; this page is standard level-payment annuity math.
How are periods counted?
Years convert to months (×12); each period is one month.
Zero interest rate?
At 0% rate, payment equals present value divided by periods.
Why show payment, PV, and FV?
When solving one unknown, the others are consistent definitions for checking the math.
Can I share this scenario with someone?
Yes. Copy link below the form keeps your current inputs so you can share the scenario or save it for later.