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APR Calculator

Estimate the annual borrowing cost of equal monthly loan payments and entered upfront fees.

Your numbers

Make it your own
Updates as you type
Modeled nominal annual APR
8.0679%

Calculated from your inputs · rounded for display

Effective annual cost8.3731%
Monthly payment$396.02
Net proceeds$19,500.00

A fixed-payment cash-flow model with upfront fees. Not a legally compliant disclosure calculation for every jurisdiction, fee type or timing convention.

Your calculation, step by step

No black boxes
  1. Net proceeds = 20000 − 500 = 19500.
  2. Solve the monthly rate that discounts all equal monthly payments to net proceeds.
  3. Nominal annual APR = monthly rate × 12.

What if things were different?

Save up to three scenarios, then change your inputs to compare the possibilities.

How to use this calculator

  1. Enter your own values in the labeled fields. Check the units and assumptions before comparing results. Only the fields needed for your selected calculation mode are shown.
  2. Your answer updates automatically. Review the calculation steps to see exactly how it was calculated.
  3. Copy, share, save, or download your result. Saved inputs stay on this device.

How the calculation works

Net proceeds = payment × [1 − (1+i)^−n] / i; nominal APR = 12i

An upfront fee reduces the amount actually received while repayments are based on the full principal. Solve the monthly discount rate matching those cash flows. This simplified fixed-payment model is not a jurisdiction-specific legal APR disclosure. Review the units, period and assumptions before comparing scenarios. Displayed values are rounded, while the underlying calculation retains its available precision.

A worked example

At 0% nominal interest, $1,200 repaid in 12 payments of $100 with no fees has a modeled APR of 0%. Adding upfront fees makes the APR positive.

Reading your result

Use the main result together with its units and supporting figures. Display values are rounded; calculations keep their underlying precision. A change in inputs or assumptions can change the answer. Compare the step-by-step working with your intended use before relying on an estimate.

Frequently asked questions

What assumptions does this calculation use?

An upfront fee reduces the amount actually received while repayments are based on the full principal. Solve the monthly discount rate matching those cash flows. This simplified fixed-payment model is not a jurisdiction-specific legal APR disclosure.

Can I save or check a scenario?

The result includes the working and supporting values. Save and Restore keep inputs on this device; Copy, Download and Print export the result. Sharing a scenario explicitly includes the inputs in its link.

Sources & methodology

This calculator uses the mathematical identity and assumptions stated above. No current rates, prices, or external data are loaded. Conversion tools use international unit definitions.

Formula review: October 24, 2026. Read our methodology.