APR and Loan Fees Explained

How interest, fees and loan length combine to determine borrowing cost

Reviewed: August 2, 2026 · Educational content
Quick answer: APR expresses many borrowing costs as an annual rate, helping compare products. A short-term loan can have a very high annualized cost even when the dollar fee seems small.

Principal, interest and fees

Principal is the amount borrowed. Interest is a charge based on the balance and rate. Fees may include origination, subscription, expedited-funding, late or returned-payment charges.

Why loan length matters

A $15 fee on a $100 advance for two weeks is not “15% per year.” Annualizing a short fee produces a much larger percentage because the borrowing period is brief.

What to compare

MeasureQuestion
Amount receivedHow much money reaches you?
Total repaymentHow much leaves your account?
Payment timingCan your budget absorb each payment?
Mandatory feesWhich fees cannot be avoided?
Optional feesAre faster funding or tips truly optional?

Use the calculators

Estimate instalment loan cost or annualize a short-term fee.