Quick answer: Interest rate is the percentage a lender charges on the principal you borrow. APR (annual percentage rate) includes that interest plus origination fees, closing costs, and other mandatory charges, expressed as a single annual percentage so you can compare true loan costs across lenders.
Key Takeaways
- The Truth in Lending Act (15 U.S.C. § 1601) requires lenders to disclose APR so borrowers can compare total cost.
- A 10% interest rate can carry a 12% APR if the lender charges a 3% origination fee upfront.
- APR is always equal to or higher than the advertised interest rate because it rolls in fees.
- Comparing APR alone is not enough—check repayment term length and prepayment penalty clauses as well.
