Method
The calculator solves the monthly rate that makes the present value of the scheduled payments equal to the amount financed, then annualizes that monthly rate. Upfront finance charges reduce the amount financed for the APR estimate.
Example
If a borrower receives $10,000 and pays $320 per month for 36 months, the calculator solves the monthly rate implied by those cash flows. If $400 of upfront finance charges are added, the borrower effectively receives less cash, so the APR estimate rises even when the payment stays the same.
Common mistakes
Do not compare APR with the note rate as if they are the same thing. APR is designed to reflect certain finance charges and timing, while the note rate is the interest rate used for scheduled interest.
Limitations
This educational estimate does not replace legally required APR disclosures. Real APR rules can depend on timing, compounding, payment schedule, excluded fees and jurisdiction-specific disclosure law.
References
- Consumer Financial Protection Bureau: lending disclosures, accessed 2026-05-16.
Last reviewed: 2026-05-16