APR vs. Interest Rate: What's the Difference?

The interest rate is the cost of borrowing the money; the APR includes fees too. Comparing loans by APR is how you find the real cost.

Written by Jordan Ellery, Personal-finance writer · Reviewed by Priya Nadella, CPA, Certified Public Accountant (reviewer) · Updated July 2026

Interest rate vs. APR

The interest rate is the percentage a lender charges on the money you borrow. The annual percentage rate (APR) is broader: it folds in the interest rate plus certain fees — origination fees, points, and other loan costs — expressed as a yearly percentage. Because APR includes fees, it's usually higher than the interest rate, and it's the better number for comparing loans.

By federal law (the Truth in Lending Act), lenders must disclose the APR, precisely so borrowers can compare offers on an apples-to-apples basis. Two loans with the same interest rate can have very different APRs if one charges heavy fees.

A worked example

Suppose you borrow $15,000 at a 12% interest rate over 3 years, but the lender charges a 3% origination fee ($450) deducted from your disbursement. You repay based on the full $15,000, but only receive $14,550 — so your true cost, the APR, is higher than 12%.

That's why our personal loan calculator shows both the payment on the full amount and the cash you actually receive. When shopping, always compare the APR, not the headline interest rate.

When APR can mislead

APR assumes you keep the loan for its full term. On a mortgage you pay off or refinance early, the up-front fees are spread over fewer years, so your real cost is higher than the quoted APR suggests. For loans you might exit early, weigh the fees directly rather than relying on APR alone.

Informational only — not financial or tax advice. This article is general educational information and may not reflect current figures or your individual situation. Tax and financial rules change; verify with the IRS or a qualified professional before acting.