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

What Is an Interest Rate?

The interest rate on a loan is the percentage of the principal that a lender charges annually for borrowing money. It represents the base cost of borrowing before other fees are factored in.

What Is APR?

The Annual Percentage Rate (APR) includes the interest rate plus most fees and other costs associated with the loan, expressed as a yearly rate. Because it captures a more complete picture of the loan's cost, the APR is generally a better tool for comparing offers from different lenders.

Why APR Matters

When comparing personal loan offers, two loans may advertise the same interest rate but have very different APRs. This happens because one lender may charge higher origination fees or other costs. The Truth in Lending Act (TILA) requires lenders to disclose the APR before you finalize a loan.

What APR Typically Includes

• The base interest rate
• Origination fees
• Certain administrative fees
• Prepaid interest or points (more common in mortgages)

What APR May Not Include

• Late payment fees
• Prepayment penalties
• Optional add-on products

Practical Example

Suppose two lenders both offer a $10,000 loan at a 15% interest rate for 36 months. Lender A charges no origination fee, so the APR is also approximately 15%. Lender B charges a 5% origination fee ($500), which raises the effective APR to approximately 22%. The monthly payment on Lender B's loan appears similar, but you would receive only $9,500 after the fee is deducted.

Key Takeaway

Always compare loans using the APR, not just the interest rate. A lower interest rate with high fees may cost more overall than a slightly higher rate with no fees.

This article is for educational purposes only and does not constitute financial advice.