Free Annuity Calculator Online
Use this free annuity calculator to find your periodic payment, present value, or future value. Choose your solve mode, enter the interest rate and number of periods, and get instant results with a growth chart showing how your annuity builds over time.
Monthly Payment
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How This Annuity Calculator Works
The annuity calculator solves the core time-value-of-money equation that links present value, future value, periodic payment, interest rate, and number of periods. You pick which variable to solve for, enter the others, and the calculator does the rest.
In Payment mode, the annuity calculator determines how much you receive (or pay) each period given a lump sum and rate. For example, a $300,000 retirement fund at 4% over 25 years yields about $1,584 per month — enough to supplement Social Security for many retirees.
In Present Value mode, you find out how much money you need today to generate a specific payment stream. And in Future Value mode, you discover what your regular contributions grow into over time. The annuity calculator displays a chart so you can visualize the accumulation or drawdown.
Common Annuity Scenarios
Switch modes in the annuity calculator to match your specific financial question.
Key Annuity Concepts
Time Value
A dollar today is worth more than a dollar tomorrow because it can earn interest. The annuity calculator accounts for this by discounting future payments back to their present value. At 5%, $1,000 received in 10 years is worth only $614 today.
Compounding
Each period, interest accrues on both the original amount and previously earned interest. Monthly compounding produces slightly higher returns than annual compounding. The annuity calculator handles monthly periods by default for precision.
Rate Sensitivity
Small rate changes have big effects over long periods. A 1% difference on a 30-year annuity can change payments by 15-20%. Use the annuity calculator to test multiple rates and find the scenario that best fits your financial plan.
Frequently Asked Questions
Disclaimer: This annuity calculator is for educational and illustrative purposes only. It assumes a fixed interest rate and does not account for taxes, fees, or inflation. Consult a licensed financial advisor before purchasing an annuity or making retirement decisions.
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