APR vs. Interest Rate: Why the 11% Offer Can Cost More Than the 13% One

Two lenders quote you on a $10,000, 36-month loan. One says 11%. The other says 13%. The 11% offer looks like the obvious pick, and it can easily be the more expensive one. Whether it is depends on a second number printed on every loan disclosure: the APR.

Why every loan has two rates

The interest rate is the yearly price of the money itself, charged on whatever balance you still owe. The annual percentage rate, or APR, is the cost of the credit as a yearly rate. It starts with the interest and adds certain fees the lender charges to make the loan.

The two numbers exist because of the Truth in Lending Act, a 1968 federal law, and its implementing rule, Regulation Z. Before it, lenders stated their charges in different ways, which made side-by-side comparison hard. The law’s answer was a standard measure. Every closed-end loan disclosure must show the APR alongside the finance charge (the dollar cost of credit), the amount financed, and the total of payments.

If a loan has no fees that count toward the finance charge, the APR and the interest rate are the same. Any gap between them is fees.

What APR includes, and what it leaves out

For installment loans like personal and auto loans, Regulation Z decides which charges are part of the finance charge, and therefore part of the APR. The broad pattern:

Usually included

Interest. Loan fees such as origination fees and points. Service or carrying charges. Credit report or investigation fees on non-mortgage loans. Premiums for credit insurance or debt-cancellation coverage when the lender requires it.

Usually excluded

Application fees charged to every applicant whether or not they’re approved. Late fees and other charges for missing a payment. Optional credit insurance, when the lender discloses in writing that it isn’t required and you sign to request it. Certain government fees for recording a lien.

The exclusions matter. APR tells you the cost of a loan you repay exactly as scheduled. It says nothing about what a late payment costs, so read the late-charge line on the disclosure separately.

The worked example: a deducted origination fee

Back to the two offers. Offer A has the lower rate but charges a 6% origination fee, taken out of the loan before the money reaches you. Offer B has no fee. Both rates are hypothetical.

Why does a 6% fee add more than 4 points to the APR? Interest runs on $10,000 while you only received $9,400, and the fee is paid up front rather than over three years. The chart shows the same loan: what you receive, what you repay, and the APR that results.

Interest rate11%

Estimated APR15.33%

Cost of borrowing$2,386

• You receive $9,400
• Fee $600 (6%)
• Interest $1,786

Total repaid: $11,785.93 in 36 payments of $327.39.

These APRs are estimates from standard math. A lender’s disclosure may differ slightly because of exact payment dates, and the disclosure is the official figure.

If you need the full $10,000 in hand

A deducted fee creates a second problem. If the bill is $10,000, Offer A doesn’t cover it. To net about $10,000 after a 6% fee, you’d request around $10,640. At 11% over 36 months, that’s $348.34 a month, and you’d receive $10,001.60.

The cost of borrowing rises to $2,538.62, which is $408.82 more than Offer B’s $2,129.80, and the payment is now $11.40 higher than B’s. The APR stays at about 15.33%, because the fee is the same percentage and the term hasn’t changed. Our guide to origination fees covers sizing a request around a deducted fee in more detail.

When comparing APRs points you the wrong way

APR is a good tool for one comparison: the same loan amount, over the same term, repaid on schedule. Change any of those and it can steer you wrong.

Different terms

APR spreads up-front fees across the life of the loan. Stretch the term and the same fee looks smaller per year, so the APR drops even as the dollars rise. Here is Offer A again, with the same 11% rate and 6% fee, over three terms:

The 60-month version has the lowest APR and costs about twice as much in dollars as the 24-month version. If you compare a 60-month offer against a 24-month offer by APR alone, the longer loan wins on paper and loses at the bank. Our guide to loan term and total cost goes deeper on that trade-off.

Different amounts, with flat fees

A flat fee weighs far more on a small loan. A hypothetical $50 fee on a $1,000, 12-month loan at 11% gives an APR of about 20.83%. The same $50 fee on a $10,000 loan at the same rate and term gives about 11.95%. Same lender, same fee, very different APR. That’s accurate, because $50 is a much bigger share of $1,000, but it means APRs on different-sized requests aren’t directly comparable.

If you plan to pay the loan off early

APR assumes you make every scheduled payment. Pay a fee-heavy loan off in a year and the up-front fee was spread over far less time than the APR assumed, so your real cost per year was higher. If an early payoff is likely, a no-fee loan at a somewhat higher rate often comes out ahead.

Variable rates and credit cards

On a variable-rate loan, the disclosed APR assumes today’s rate holds, so it can’t tell you what you’ll actually pay. Our explainer on fixed and variable rates covers how those move. Credit cards also use the term APR, but for open-end credit it generally reflects the interest rate alone. Annual or balance-transfer fees aren’t folded in the same way.

A rule for comparing offers

1. If the amount and term match, compare APRs. The lower APR is the cheaper loan if you repay on schedule.
2. If they don’t match, compare dollars. Look at the amount financed (what you receive) and the total of payments (what you repay). The gap between them is the finance charge, the real cost.
3. Either way, check the late-charge and prepayment lines, which APR doesn’t capture.

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