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Finance

Annuity Payment Calculator

Calculate monthly loan payment, total paid, and interest.

Last validated: 2026-02-14

Use this free online Annuity Payment Calculator to compute periodic payment amount for loans or investments with fixed rate and term. Use it for budgeting, pricing, forecasting, and comparison work where small input changes can materially affect the final decision. The form focuses on Principal, Annual rate (%), Term (years) and returns Loan Inputs, Result, so you can move from input to answer without setting up a spreadsheet or custom script. Run one realistic example, adjust the inputs, and compare how the result changes before you copy or share it. The output is an estimate rather than financial advice, so confirm assumptions, taxes, fees, and policy details before making commitments.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Loan Inputs

Result

Monthly payment: $1,580.17

Total paid: $568,861.22

Total interest: $318,861.22

Payments: 360 monthly payments

How to use this tool

  1. Enter Principal, Annual rate (%), Term (years) for the annuity payment calculator, keeping units, dates, or text format consistent with the form labels.
  2. Confirm the currency, time period, rate, and fee assumptions before calculating the estimate.
  3. Click "Run the tool" and review Loan Inputs, Result for the primary output.
  4. Test a conservative and aggressive scenario so the decision is not based on a single fragile estimate.

Worked Example

Auto-generated from the tool's current default or entered inputs.

Example Inputs

  • Principal: 250000.0
  • Annual rate: 6.5
  • Years: 30.0
  • Months: 360
  • Monthly payment: 1580.1700587324133

Expected Outputs

  • Principal: 250000
  • Annual rate: 6.5
  • Years: 30
  • Months: 360

Interpretation

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