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Annuity Calculator

Calculate the future value of a fixed annuity investment.

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Calculation steps

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  1. 1

    Formula selected

    The calculator uses the following formula or method.

    Future value = initial investment × (1 + annual rate)^years; interest earned = future value − initial investment.

  2. 2

    Values entered

    Your values are placed into the calculation.

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  3. 3

    Result calculated

    The formula or method produces the following result values.

    Results will appear after a successful calculation.

  4. 4

    Answer formatted

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How it works

Calculate the future value of a fixed annuity investment.

Input query strings and outputs

Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.

Input query strings

3
  • ?initialInvestment= Initial Investment ($)

    Number · Optional · Default: 50,000

  • ?years= Growth Period (Years)

    Number · Optional · Default: 20

  • ?rate= Annual Interest Rate (%)

    Number · Optional · Default: 5.5

Outputs

1
  • result Result

    Text · Primary output

result contains the calculator’s complete rendered result area, including its visible result cards, tables, charts, and messages.

Calculate the accumulation of a fixed annuity

Description

The Annuity Calculator helps you project the future value of a fixed annuity investment. By specifying an initial investment amount and the expected interest rate, you can see how your principal will grow over a set number of years through the power of annual compounding.

Inputs

  • Initial Investment: The starting principal amount deposited into the annuity ($).
  • Growth Period: The number of years you plan to let the investment grow.
  • Annual Interest Rate: The guaranteed or expected annual return percentage (%).

Outputs

  • Future Value: The estimated total value of the annuity at the end of the growth period.
  • Total Interest: The total amount earned from compounding interest over the term.

Chart

  • Growth Area Chart: Visualizes the increasing value of the annuity year-over-year.

“Good to Know”

  • Annuities are often used as a long-term retirement planning tool to provide a predictable future sum.
  • A “fixed annuity” offers a guaranteed rate of return for a specific period, making it a lower-risk investment compared to stocks.
  • This calculator assumes annual compounding; actual annuity products may compound monthly or quarterly, which can slightly increase the final total.

Examples

Example 1: Long-Term Growth

  • Input:
    • Investment: $50,000
    • Years: 20
    • Rate: 5.5%
  • Output:
    • Future Value: ~$145,888
    • Total Interest: ~$95,888

Example 2: Short-Term Placement

  • Input:
    • Investment: $100,000
    • Years: 5
    • Rate: 4.0%
  • Output:
    • Future Value: ~$121,665
    • Total Interest: ~$21,665

Example 3: Legacy Fund

  • Input:
    • Investment: $250,000
    • Years: 30
    • Rate: 6.0%
  • Output:
    • Future Value: ~$1,435,873
    • Total Interest: ~$1,185,873
Sources
  • No external reference is listed for this calculator. Its formula and variable definitions are shown above.
Limitations
  • Estimates use the rates, timing, and assumptions entered. Fees, taxes, lender rules, and future changes are included only where explicitly shown.