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Annuity Calculator

Use this annuity calculator to model growth, return, or time-value scenarios for annuity.

Primary answer
Future value
Inputs to verify
Starting amount, Payment per period, and Payment frequency
Use type
Use as a review-only estimate; verify before relying on it.
Keyword intent
annuity calculator

Calculator

Annuity Calculator

Calculates future value from starting amount, payment per period, payment frequency. Defaults are filled in so you can review a working example before changing inputs.

USD

Existing balance before the fixed payment stream begins.

USD

Equal payment made each selected period.

Frequency used for payments and rate conversion.

%

User-entered fixed annual rate. Enter 5 for 5%, not 0.05.

years

Time horizon. It must resolve to a whole number of payment periods.

Ordinary annuity uses end-of-period payments; annuity due uses beginning-of-period payments.

Result

Result reflects the current submitted inputs.

  • Risk C
  • Reviewed 2026-05-26
  • 5 sources
Future value76,600.79 USD
Total contributed50,000 USD
Interest earned26,600.79 USD
Effective period rate0.40741238%
Periods180

Breakdown

Periods per year
12
Payment timing
end
  • The annual rate is a fixed user-entered scenario assumption.
  • Payments are equal and occur at the selected frequency and timing.
  • The calculator does not quote or value an insurance annuity product.
  • Taxes, inflation, surrender charges, mortality assumptions, riders, and guarantees are excluded.
  • This is educational time-value math, not investment, insurance, tax, or financial advice.

Accuracy notes

Risk level
C
Reviewed
2026-05-26
Sources
5
Primary result
Future value

Formula logic is kept in a pure calculator module with fixtures, source notes, and page-visible assumptions.

High-risk estimate

Educational estimate, not advice

This finance calculator is for educational estimates only. It is not financial advice, a lender quote, investment advice, tax advice, legal advice, or a substitute for reviewing actual contracts, disclosures, rates, fees, and local rules.

Check the reviewed sources, assumptions, and formula limits before using this result for a financial, health, or safety decision.

Review cadence: 12 months; next review due 2027-05-26.

Categories

What the result means

Future value answers the page's main annuity question. Accumulated value at the end of the scenario. Read the projected value or rate first, then use contribution, period, and return outputs to explain why it changed. Use total contributed, interest earned, and effective period rate to explain why future value moved when an input changed. Change one assumption at a time so you can see which input is driving the projection.

Future valueAccumulated value at the end of the scenario.
Total contributedStarting amount plus all fixed payments.
Interest earnedFuture value minus total contributed.
Effective period rateAnnual rate converted to the payment period.

Use the result this way

  1. Start with Future value, then use supporting outputs only to explain the primary answer.
  2. Verify starting amount, payment per period, and payment frequency before copying the result.
  3. Choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges.
  4. Change one assumption at a time so you can see which input is driving the projection.

User job

How to use this calculator

Use Annuity Calculator when you need future value, then use total contributed and interest earned to check the context for planning conversations, quote comparisons, payment checks, and scenario review.

Best for

  • Comparing one financial scenario with another
  • Preparing questions for a lender, advisor, or statement review
  • Reviewing a default example before entering your own starting amount and payment per period.

Check before relying

  • Verify rates, fees, timing, taxes, and local rules against official documents before acting.
  • The annual rate is a fixed user-entered scenario assumption.
  • Payments are equal and occur at the selected frequency and timing.
  • Source context: OpenStax, reviewed 2026-05-26.

Next useful step

  • Annuity Payout CalculatorUse next when the investment task needs payout per period instead of future value.
  • Mutual Fund CalculatorUse next when the investment task needs ending value after costs instead of future value.
  • Future Value CalculatorUse next when the investment comparison needs future value inputs such as present value and periodic payment.

Limits of this estimate

  • Supports educational time-value math only; it does not quote or value an insurance annuity product, surrender charge, rider, guarantee, mortality assumption, tax outcome, or suitability decision.
  • The result depends on user-entered inputs and the documented assumptions; defaults are examples only.
  • Search indexing approval does not downgrade this page from risk level C or turn the result into professional advice.

Formula

Future value equals the compounded starting amount plus the future value of equal payments. Beginning payments use annuity-due timing. Key assumptions: The annual rate is a fixed user-entered scenario assumption. Payments are equal and occur at the selected frequency and timing. The calculator does not quote or value an insurance annuity product.

  • Future value equals the compounded starting amount plus the future value of equal payments. Beginning payments use annuity-due timing.
  • The annual rate is a fixed user-entered scenario assumption.
  • Payments are equal and occur at the selected frequency and timing.
  • Primary source context: OpenStax.

Inputs

Enter starting amount, payment per period, payment frequency, and annual rate assumption for planning conversations, scenario checks, and lender or statement comparison. Before calculating, choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges. Starting amount: Existing balance before the fixed payment stream begins. Payment per period: Equal payment made each selected period. Payment frequency: Frequency used for payments and rate conversion. Annual rate assumption: User-entered fixed annual rate. Enter 5 for 5%, not 0.05.

Starting amountExisting balance before the fixed payment stream begins.
Payment per periodEqual payment made each selected period.
Payment frequencyFrequency used for payments and rate conversion.
Annual rate assumptionUser-entered fixed annual rate. Enter 5 for 5%, not 0.05.
YearsTime horizon. It must resolve to a whole number of payment periods.
Payment timingOrdinary annuity uses end-of-period payments; annuity due uses beginning-of-period payments.

Example

Using the default inputs, Annuity Calculator returns future value of 76,600.79 USD. Adjust starting amount, payment per period, payment frequency, and annual rate assumption to match your own scenario.

FAQ

How is future value calculated here?

Future value equals the compounded starting amount plus the future value of equal payments. Beginning payments use annuity-due timing. The first assumption to check is: The annual rate is a fixed user-entered scenario assumption.

What does Future value mean for annuity?

Read the projected value or rate first, then use contribution, period, and return outputs to explain why it changed. Secondary values such as total contributed, interest earned, and effective period rate are there to explain the primary answer, not to replace it.

What should I enter for Starting amount?

Existing balance before the fixed payment stream begins. Use USD for this field. Choose the mode or method first because it can change which formula is applied, keep units consistent with the labels shown in the form, and stay within the documented minimum and maximum ranges.

How does Payment per period change future value?

Equal payment made each selected period. Changing it can alter future value because the formula uses the submitted inputs together. Also compare nominal versus effective rate, contribution timing, compounding frequency, inflation, fees, and tax treatment.

Why does the annuity example show 76,600.79 USD for future value?

The default inputs produce 76,600.79 USD for future value. Treat that as a format and scale check, then replace every default value with your own inputs.

Can the annuity result replace financial advice?

No. Use the annuity result as comparison context only. Market returns, taxes, fees, legal terms, and personal constraints can change the real outcome.

Sources

Last reviewed: 2026-05-26

  • academicReviewed 2026-05-26 · Source Undated page, accessed 2026-05-26
    Principles of Finance: AnnuitiesOpenStax. Future value of equal payment streams and payment timing assumptions.
    Scope
    Open educational finance reference for ordinary annuities and annuities due.
    Supports
    Future value of equal payment streams and payment timing assumptions.
    Limits
    Supports educational time-value math only; it does not quote or value an insurance annuity product, surrender charge, rider, guarantee, mortality assumption, tax outcome, or suitability decision.
  • academicReviewed 2026-05-26 · Source Undated page, accessed 2026-05-26
    Principles of Finance: Time Value of Money BasicsOpenStax. Compounding of the starting balance and rate-period interpretation.
    Scope
    Open educational finance reference for compounding and future value.
    Supports
    Compounding of the starting balance and rate-period interpretation.
    Limits
    Supports educational time-value math only; it does not quote or value an insurance annuity product, surrender charge, rider, guarantee, mortality assumption, tax outcome, or suitability decision.
  • reputableReviewed 2026-05-26 · Source Undated page, accessed 2026-05-26
    FV functionMicrosoft Support. Input contract and timing convention for future value calculations.
    Scope
    Spreadsheet function reference for future value with fixed payments and timing.
    Supports
    Input contract and timing convention for future value calculations.
    Limits
    Supports educational time-value math only; it does not quote or value an insurance annuity product, surrender charge, rider, guarantee, mortality assumption, tax outcome, or suitability decision.
  • officialReviewed 2026-05-26 · Source Undated page, accessed 2026-05-28
    AnnuitiesInvestor.gov, U.S. Securities and Exchange Commission. Risk rationale, insurance-product limitations, and disclaimer boundaries for annuity-related estimates.
    Scope
    Investor protection reference describing annuity products, retirement use, fees, surrender charges, and risk context.
    Supports
    Risk rationale, insurance-product limitations, and disclaimer boundaries for annuity-related estimates.
    Limits
    Does not provide the time-value formula implemented here and does not quote any insurer contract, rider, guarantee, fee, tax, or suitability outcome.
  • officialReviewed 2026-05-26 · Source Undated page, accessed 2026-05-28
    AnnuitiesFINRA. Limitations around fees, surrender charges, insurance-company risk, and product suitability.
    Scope
    Investor education reference on annuity complexity, expenses, regulation, and retirement planning context.
    Supports
    Limitations around fees, surrender charges, insurance-company risk, and product suitability.
    Limits
    Used for risk and limitation context only; it is not a product recommendation, quote source, or formula oracle for this calculator.

Disclaimer

This finance calculator is for educational estimates only. It is not financial advice, a lender quote, investment advice, tax advice, legal advice, or a substitute for reviewing actual contracts, disclosures, rates, fees, and local rules.