An annuity is a type of retirement plan in which the same amount is invested each year and the interest rate remains fixed.
To see the mathematics of an annuity (and the formula), click here.

The annuity calculator allows you the option of solving for any of 4 variables. Click on the "unknown" variable, input the other 3 numbers, click on "CALCULATE"and the result will be displayed.

EXAMPLES

1) You invest 2,000 per year at 9% interest for 10 years. What is the amount after 10 years?
Click on the TOTAL button, enter the 3 amounts, click CALCULATE and the answer is $33,120.59

2) At the end of 20 years, an annuity invested at 7.5% interest is now worth $95,200. How much was invested per year?
Click on the ANNUAL AMOUNT button, enter the 3 amounts, click CALCULATE and the answer is $2,045

3) $2,000 was invested annually at a rate of 10% interest and the annuity is now worth $1,000,000. How long did this take?
Click on the YEARS button, enter the 3 amounts, click CALCULATE and the answer is 40.2735 years.

4) What interest rate would you need to have $500,000 after 40 years of investing 2,000 per year?
Click on the RATE button, enter the 3 amounts, click CALCULATE and the answer is 7.5854 per cent.