Lenders advertise both an interest rate and an APR. They are related but not the same, and the difference can help you spot a costly deal.
What each measures
The interest rate is the cost of borrowing the principal. The annual percentage rate, or APR, adds certain finance charges such as origination fees, points and mortgage insurance, expressed as a yearly rate. Because it includes fees, APR is usually higher than the interest rate.
Using APR to compare
If two loans have the same interest rate, the one with the higher APR has higher fees. APR works best for comparing loans with the same term. If you plan to pay off a loan early, upfront fees weigh more heavily on you than APR suggests.
APR on credit cards
On cards, APR is generally the interest rate, with no compounding built into the stated figure. Interest compounds daily on most cards, so the effective yearly cost is a bit higher than the APR.
Try the numbers
Use our APR Calculator to see this in practice. With its default example (Loan amount: $25,000; Stated interest rate: 9%; Term (months): 60), it shows apr: 10.31%. Adjust the inputs to match your situation.
Key takeaways
- APR includes fees; the interest rate does not.
- Compare APRs across loans with similar terms.
- Consider how long you will keep the loan.
This article is for general education and is not personalized financial, tax or legal advice. Rules and limits change; confirm current figures with official sources such as IRS.gov, SSA.gov and StudentAid.gov, or consult a qualified professional. © 2026 FinanzCalc.