Two lenders quote you the same loan. One advertises a 6.5% interest rate. The other advertises a 6.5% APR. These are not the same offer, and the second one is the honest number.
The plain definitions
The interest rate is the price of borrowing the money, expressed as a yearly percentage of what you still owe. Nothing else is included.
The APR, or annual percentage rate, is the interest rate plus the mandatory fees rolled into the loan, expressed the same way. Origination fees, broker fees, discount points, some closing costs. It is designed to be the number you can actually compare between lenders.
This is why APR is normally the higher of the two. If a lender quotes an interest rate that equals the APR exactly, that usually means there are no financed fees, which is a genuinely good sign.
The rule of thumb: compare APR to APR. A lender advertising a low interest rate and a high APR is telling you the fees are large. That gap is the actual cost of the paperwork.
Where the gap comes from
- Origination fees. A percentage of the loan taken off the top. On some federal student loans this is deducted before the money reaches your school, which means you repay more than you received.
- Discount points. Paying money up front to lower the rate. Lowers the interest rate, raises the APR relative to it.
- Broker and processing fees. Common on mortgages and auto loans arranged through a dealer.
Where APR quietly misleads you
APR is better than interest rate alone, but it is not a perfect number, and knowing its blind spots is worth a few minutes.
It assumes you keep the loan for the full term. APR spreads the fees across every scheduled year. Refinance or sell in year three on a thirty-year loan and you absorbed those fees over three years, not thirty, so your real cost was far higher than the advertised APR.
On credit cards it excludes compounding. A card quoted at 24.99% APR compounds daily, so the effective annual rate you actually experience is closer to 28.4% if you carry a balance all year. APR is the nominal rate, not the compounded one.
Variable APRs move. The advertised figure is the starting point, tied to an index. It is not a ceiling.
What to ask for instead
The single most useful question when comparing any two loans: what is the total amount I will have paid when this is finished? That collapses rate, fees, and term into one figure that cannot be dressed up.
Lenders are generally required to disclose it. On a mortgage it appears on the Loan Estimate. On a student loan it is on the disclosure statement. If a lender is reluctant to give you a total, that reluctance is your answer.
The short version
- Interest rate is the borrowing price. APR is that plus financed fees.
- Compare APR to APR, never APR to interest rate.
- APR assumes you hold the loan the full term. Leaving early makes fees cost more than advertised.
- Ask for the total repaid. It is the one number nobody can spin.
Common questions
Is APR always higher than the interest rate?
It is higher whenever the loan carries financed fees, which is most of the time. If they are identical, the loan has no rolled-in fees, which is a good sign rather than a trick.
Which number should I use to compare loans?
APR, always, and only against another APR. Then ask each lender for the total amount repaid over the full term as a final check.
Does APR include compounding on a credit card?
No. Credit card APR is a nominal annual rate, but most cards compound daily, so carrying a balance all year costs more than the stated APR suggests.