Annuity Payment Calculator

Use our Annuity Payment Calculator to project your future income. Input key details to see estimated payouts, compare annuity types, and make informed retirement decisions.

Annuity Payment Details

100% browser-based No upload to server Free to use

Frequently Asked Questions About Online Calculators

How is the monthly payment calculated for an annuity?

The calculator uses a standard financial formula that takes your principal (the lump sum), the annual interest rate divided by the number of periods per year, and the total number of payments. It then solves for the periodic payment amount that would exactly draw down the principal to zero over the specified term. If you include a deferred period, it first grows the principal untouched. If you include a growth rate, it adjusts each subsequent payment upward by that percentage.

Can I use this annuity calculator without giving my email address or signing up?

Yes, completely. You do not need to create an account, log in, or provide any personal information. The calculator runs entirely in your web browser using JavaScript. None of the numbers you enter—not the principal, not your interest rate assumptions, nothing—are sent to a server. This means you can use it for sensitive financial planning without worrying about data privacy.

What’s the difference between an immediate annuity and a deferred annuity in the calculator?

An immediate annuity starts paying you right away. You would set the “Deferred Years” field to 0. A deferred annuity has an accumulation phase where no payments are made, and your money continues to grow. You would enter a positive number in the deferred years field. The calculator will first grow your initial principal at the annual interest rate for those deferral years, and then calculate your periodic payments based on the larger, accumulated balance.

Why does the total interest earned sometimes look lower than I expected?

If you are in “Payment Amount” mode for a long-term annuity, the total interest earned represents the extra money you receive above your original principal over the life of the annuity. However, remember that you are also receiving your original principal back gradually. In a 30-year annuity with a 5% return, a large portion of your early payments is actually your own principal. The interest portion grows over time. The summary box clearly shows the breakdown between total payments and total interest.

Does the calculator assume payments are made at the beginning or end of each period?

All calculations in this tool assume end-of-period payments (what finance professionals call an “ordinary annuity”). This is the most common structure for retirement income, where you receive your first payment one month (or one year) after purchasing the annuity. If you need a calculation for beginning-of-period payments (an “annuity due”), the results here will be very slightly conservative—actual payments would be a small percentage higher.

Can I save or print my annuity calculation results?

Yes. The calculator itself doesn’t have a “Save” button for security reasons (no stored data), but you can easily take a screenshot of the results section. Or, you can use your browser’s print function (Ctrl+P or Cmd+P) to print the page directly. The chart and summary boxes will print clearly. For a permanent record, it’s best to note down the key numbers or save the URL with your inputs—though the tool won’t remember them after you close the tab.

Guide