Annuity Calculator Online
Work out the future value, present value, and total payout of a fixed-payment annuity in your browser. Estimates only, not financial advice.
The Annuity Calculator runs entirely in your browser. The payment, rate, and term you enter stay on your device and are never uploaded to ArrayKit. Results are estimates only, not financial advice.
Open the Annuity Payout Calculator
About Annuity Calculator
Annuity Calculator works out how a series of equal, regular payments grows into a future value, or discounts back to a present value, given an interest rate and a term. Enter the payment amount, the annual rate, the number of years, and how often payments are made, then choose whether each payment lands at the end of the period (an ordinary annuity, like most retirement contributions) or the start (an annuity due, like most lease or rent payments). The calculator applies the standard time-value-of-money formulas and shows the accumulated future value, the equivalent present value, and the total of every payment with no interest applied. It is useful for sizing a retirement savings plan, comparing a lump sum to a stream of payments, or checking a textbook problem. Figures are estimates only, not financial advice, and everything computes locally on your device.
Features
- Solves future value, present value, and total paid for a fixed-payment annuity
- Supports ordinary annuities (end-of-period) and annuity due (start-of-period)
- Choose yearly, quarterly, or monthly payment frequency
- Uses the standard time-value-of-money annuity formulas
- Handles a zero interest rate without errors, reducing to a simple sum
- Clear error messages for an invalid payment, rate, term, or frequency
- One-click copy of a plain-text results summary
- Runs entirely in your browser — your figures are not uploaded
How to use the Annuity Calculator
- Enter the payment amount made each period
- Enter the annual interest rate as a percentage
- Enter the term in years and pick the payment frequency
- Choose ordinary (end of period) or due (start of period)
- Read the future value, present value, and total paid
Example
Input
$1,000/yr, 5%, 10 yr
Output
Future value: $12,577.89
An ordinary annuity of $1,000 a year at 5% for 10 years accumulates to $12,577.89.
Common errors & troubleshooting
- The future value looks far too small. — Check the interest rate field — enter 5 for 5%, not 0.05. The calculator treats the rate as a percentage, not a decimal.
- Results don't match a retirement-plan projection. — Confirm whether your plan compounds and pays monthly or yearly, and match the payment frequency and per-period payment amount in the Annuity Calculator.
- Annuity due and ordinary annuity give different future values for the same inputs. — That's expected — an annuity due pays at the start of each period, so every payment earns one extra period of interest compared to an ordinary annuity.
- Present value seems lower than expected. — Present value discounts every future payment back to today at the periodic rate, so a higher rate or longer term produces a bigger gap versus the future value.
Frequently asked questions
- What does the Annuity Calculator compute?
- The Annuity Calculator takes a payment amount, an annual interest rate, a term, and a payment frequency, and returns the future value (accumulated value), the present value, and the total of all payments with no interest applied.
- What is the difference between an ordinary annuity and an annuity due?
- In an ordinary annuity each payment happens at the end of a period; in an annuity due it happens at the start. Because a due payment earns interest one period earlier, its future value is the ordinary value multiplied by (1 + periodic rate).
- Does the Annuity Calculator handle a 0% interest rate?
- Yes. When the rate is 0, there is no growth to compound, so the future value and present value both equal the payment multiplied by the number of periods.
- Can I use the Annuity Calculator for monthly payments?
- Yes. Set payments per year to monthly (12) and enter the payment made each month; the calculator converts the annual rate to a monthly rate and the term to a number of monthly periods automatically.
- Are the Annuity Calculator's results financial advice?
- No. The Annuity Calculator produces mathematical estimates based on the figures you enter — it is not financial advice. Verify any retirement or investment decision with a qualified professional.
- Does the Annuity Calculator upload my financial figures?
- No. The Annuity Calculator runs entirely in your browser. The payment amount, rate, and term you enter stay on your device and are never uploaded to ArrayKit.
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