What a Personal Loan Really Costs You

The three numbers that make up the price

The interest rate on a personal loan is only part of its price. The federal Truth in Lending Act and its rule, Regulation Z, require a lender to show you a set of disclosures before you are bound by the loan, and three of them answer the question "what will this cost me?" Each one counts the cost a different way.

The Truth in Lending disclosure puts these figures in a box near the top of the loan agreement. If an offer shows you only a monthly payment and an interest rate, ask for the disclosure before you agree to anything.

Same $10,000, three offers: which costs least?

Here are three offers for a $10,000 loan with fixed rates and monthly payments. The figures are worked examples computed with the standard amortization formula, not quotes from any lender.

Offer A has a lower interest rate than Offer B, but its fee pushes the APR to 17.65%, and you get only $9,500 to spend. Offer B, at a higher rate with no fee, gives you the full $10,000 and the smallest finance charge. Offer C has the lowest rate and the lowest payment, yet it costs the most dollars, because interest runs for five years instead of three.

What the finance charge counts and leaves out

Regulation Z defines the finance charge as any charge you pay, directly or indirectly, that the lender imposes as a condition of the credit. On a personal loan that usually means the interest and an origination or processing fee. Some charges are left out because you would not pay them on schedule.

• Counted: interest, origination and processing fees, and the cost of credit insurance the lender requires.
• Not counted: late fees, returned-payment fees and other charges for a payment problem, which the disclosure lists separately.
• Usually not counted: optional credit insurance or debt protection you choose to buy, as long as the lender discloses that it is optional and you sign for it.

That is why the late fee and any add-on products need their own check: they can raise what you pay without moving the APR.

How accurate the APR on your disclosure must be

For an ordinary fixed-payment loan, Regulation Z treats a disclosed APR as accurate if it is within one-eighth of one percentage point of the true rate. A disclosure that says 17.65% may correspond to a true APR between 17.525% and 17.775%. A larger gap is a disclosure error worth raising with the lender and, if it is not fixed, with the Consumer Financial Protection Bureau.

You can check the figure yourself. Enter the amount financed, the payment and the number of payments in a loan calculator that solves for the rate; the answer is the APR. The methodology page explains the method our calculators use.

What a typical rate looks like now

The Federal Reserve publishes the average interest rate commercial banks charge on 24-month personal loans. In its release of October 7, 2026, the preliminary figure for August 2026 was 11.90%. That is an interest rate, not an APR, and it averages bank borrowers, who tend to have strong credit. Online lenders and finance companies lend to a wider range of applicants and often charge more, plus fees.

Your own rate depends on your credit, income and debts, and on the most your state lets a licensed lender charge. See the rate caps in each state and how lenders judge applicants in Who qualifies.

A four-step check before you sign

1. 1 Ask for the Truth in Lending disclosure for each offer, not only the monthly payment.
2. 2 Line up offers with the same term and compare the APRs; the lowest APR is the cheapest credit for that term.
3. 3 Check the amount financed. If a fee is deducted, make sure the deposit still covers what you need, or use the net proceeds calculator.
4. 4 Read the finance charge and total of payments for the term you choose, and decide whether a lower payment is worth what a longer term adds.

Questions people ask