Quick start
- Open the Annuity Calculator.
- Enter the fixed payment made each period, such as $500 each month.
- Add the annual rate, number of years, and payments each year.
- Choose ordinary timing for end-of-period payments or annuity due for beginning-of-period payments.
- Calculate, then compare future value, present value, total payments, payment count, and timing before reading any real annuity contract.
Best uses
Start here if one of these sounds like your job. The examples below show which inputs matter most.
- Estimate the future value of repeated monthly or yearly payments.
- Estimate what a fixed payment stream is worth today.
- Compare ordinary annuity timing with annuity-due timing.
- Check fixed-payment annuity formula homework before looking at real contract rules.
What this calculator is for
The Annuity Calculator is for clean fixed-payment math. It estimates future value and present value from one repeated payment, then lets you compare ordinary timing with annuity-due timing before you look at any real contract.
Use it when you need fixed-payment annuity math for homework, retirement planning notes, ordinary annuity timing, annuity-due timing, present value, or future value before looking at real contract rules.
What to enter
Annuity estimates get shaky when monthly payments, annual payments, ordinary timing, and annuity-due timing are mixed together. Set payment frequency first, then keep the timing choice honest.
- Enter the fixed payment made each period, such as $500 each month.
- Enter the annual rate, number of years, and payments per year.
- Choose end-of-period timing for an ordinary annuity or beginning-of-period timing for an annuity due.
Example walkthrough
Try the starter example: $500 each month for 20 years at 5%, with payments at the end of each month. That means 240 payments, $120,000 paid in, about $205,516.83 future value, and about $75,762.66 present value.
- $500 per month for 20 years means 240 payments and $120,000 paid in.
- At 5%, the ordinary annuity estimate is about $205,516.83 future value and $75,762.66 present value.
- Switching to beginning-of-period timing raises the estimate because each payment gets one extra period in the formula.
Formula and steps
In plain language: The calculator converts the annual rate to a rate per payment period, counts the payments, then runs ordinary annuity or annuity-due formulas for future value and present value. $500 per month for 20 years creates 240 payments. At a 5% annual rate, the ordinary annuity estimate is about $205,516.83 future value and $75,762.66 present value.
Start by turning the annual rate into a rate for each payment period. Then count the payments and run the fixed-payment annuity formulas. Investor.gov and FINRA both warn that real annuity products can add fees, riders, surrender rules, and guarantees that are not part of this clean formula.
How to read the answer
Start with future value, then check present value and total payments. If future value looks huge, compare it with total payments so you can see how much comes from the rate assumption.
- Future value is the estimated ending value of the payment stream.
- Present value is what that same stream is worth today using the rate you entered.
- Total payments shows only the money paid in, so it is useful for checking how much of the future value comes from the rate assumption.
Common mistakes to avoid
Most bad annuity estimates come from mixing monthly and yearly payments, choosing the wrong timing, using a rate that is too hopeful, or treating simple formula math like a real insurer quote.
- Do not treat this as an insurance annuity quote, lifetime-income promise, or tax answer.
- Do not ignore fees, surrender charges, riders, guarantees, inflation adjustments, mortality assumptions, or contract rules.
- Do not mix monthly payments with annual payments without changing payments per year.
What to try next
A related tool can help after the fixed-payment math. The next question is usually broader investment growth, retirement savings, or turning an existing balance into a payout estimate.
- Use Investment Calculator for contribution growth.
- Use Retirement Calculator for broader retirement savings scenarios.
- Use Annuity Payout Calculator when you already have a balance and want an estimated payout.
Sources and estimate notes
OpenStax is useful for the clean annuity formulas. Investor.gov, FINRA, and NAIC are useful for the real-world warning: annuity products can include fees, riders, surrender charges, guarantees, tax issues, state insurance rules, and contract limits that are not in the formula.
This calculator still stays simple. It does not price an insurance contract, estimate lifetime income, include mortality assumptions, read fee tables, handle surrender periods, apply tax rules, value riders, or tell you whether an annuity is a good purchase.
Worked examples for Annuity Calculator
$205,516.83 future value; $75,762.66 present value
$124,704.33 future value; $64,437.27 present value
$206,373.15 future value; $76,078.33 present value
FAQ in plain language
When should I use the Annuity Calculator?
Use it when you want to test the exact inputs on this page: Estimate the future value of repeated monthly or yearly payments. Estimate what a fixed payment stream is worth today. The result is a check against your assumptions, not proof that a lender, tax app, broker, platform, or provider will use the same number.
What do the main Annuity Calculator inputs mean?
Payment amount means the fixed payment made each period, such as $500 each month or $6,000 each year. Annual rate means the fixed yearly rate assumption. Enter 5 for 5%, not 0.05. Time means how many years the payment stream lasts. Payments per year means how often payments happen. Use 12 for monthly payments and 1 for annual payments. Payment timing means whether payments happen at the end of each period, or at the beginning with one extra period to grow.
Is this the same as an annuity quote from an insurance company?
No. This page does the clean math for a fixed payment stream. A real annuity quote can change because of insurance pricing, fees, riders, surrender rules, guarantees, taxes, age, state rules, and contract wording.
What is the difference between ordinary annuity and annuity due?
An ordinary annuity treats each payment as happening at the end of the period. An annuity due treats each payment as happening at the beginning, so each payment gets one extra period in the formula.
Can this handle immediate or lifetime annuities?
Use it only as fixed-payment math. Immediate and lifetime annuities depend on contract pricing, life expectancy assumptions, payout choices, guarantees, and fees that are not in this calculator.
What is the Annuity Calculator doing with my numbers?
In plain language: The calculator converts the annual rate to a rate per payment period, counts the payments, then runs ordinary annuity or annuity-due formulas for future value and present value. $500 per month for 20 years creates 240 payments. At a 5% annual rate, the ordinary annuity estimate is about $205,516.83 future value and $75,762.66 present value.
How should I read the Annuity Calculator answer?
Future value is the estimated ending value of the payment stream. Present value is what that stream is worth today using the rate you entered. Total payments is only the money paid in, before interest math.
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Privacy and copying results
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Use Copy answer when you want to save the inputs and result in notes, homework, a message, or a project list. Check the units, labels, and limits before copying.