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What is APR?
APR (Annual Percentage Rate) is the yearly cost of borrowing as a percentage — it bundles the interest rate PLUS required fees, but does NOT account for compounding. It is the legal standard for quoting loans and credit cards (US Truth in Lending Act, 1968). A 24% APR card charges a 2% periodic rate each month on the balance.
The full answer
What APR is
`` APR = annualized (interest rate + required finance charges) — simple, no compounding Monthly periodic rate = APR / 12 ``
APR is the figure lenders are legally required to disclose (US Truth in Lending Act, 1968; Federal Reserve Regulation Z) so borrowers can compare offers on one standardized number. It folds mandatory fees — origination, mortgage points — on top of the base interest rate, which is why a mortgage's APR is usually a touch higher than its quoted "interest rate."
The key limitation: APR ignores compounding
APR is a *simple* annualization. A "24% APR" credit card does not charge 24% once a year — it charges 24% ÷ 12 = 2% each month, and because that interest compounds monthly, the effective annual cost is higher:
`` (1 + 0.24/12)^12 − 1 = 26.8% effective ``
So APR understates the true cost of revolving debt. The compounded version is the APY (also called EAR) — see the comparison page.
Where APR shows up
| Product | What the APR bundles |
|---|---|
| Credit cards | Purchase / cash-advance / penalty rates |
| Mortgages | Interest rate + points + origination + some closing costs |
| Auto / personal loans | Interest rate + origination fees |
| BNPL / installment | The annualized financing cost |
Fixed vs variable APR
- Fixed APR — stays constant (most personal loans, some cards)
- Variable APR — tracks an index (the Prime rate) plus a margin; moves when the Fed moves rates
Nominal rate vs APR vs APY
- Nominal rate — the base interest rate, no fees, no compounding
- APR — nominal + required fees, annualized simple (the *borrowing* standard)
- APY — nominal + compounding (the *saving* standard)
For the same nominal rate, APR < APY, because APY adds the interest-on-interest effect.
This explains how the rate is calculated — it is not financial advice. For personalized guidance consult a fee-only fiduciary (NAPFA.org).
Cross-reference: see /pages/what-is/apy + /pages/what-is-the-difference-between/apr-vs-apy + /pages/what-is/compound-interest.
Time ranges by condition
| Condition | Duration | Note |
|---|---|---|
| Monthly periodic rate | APR ÷ 12 | — |
| Typical US credit-card APR | 18–29% | — |
| 24% APR effective (monthly compounding) | 26.8% | — |
| Mortgage APR vs quoted rate | APR slightly higher (fees folded in) | — |
| Legal basis | US Truth in Lending Act (1968), Reg Z | — |
What changes the time
- Fees included. APR folds in required finance charges (origination, points); the bare nominal rate does not
- Compounding. APR ignores it — understates true revolving-debt cost (24% APR ≈ 26.8% effective)
- Fixed vs variable. Variable APR moves with the Prime/Fed rate; fixed stays put
- Credit profile. Higher credit score → lower offered APR (lender prices risk)
Common questions
Is APR the same as the interest rate?
No. The interest rate is the base cost of borrowing the principal; APR is that rate PLUS required fees (origination, mortgage points), annualized. That is why a loan's APR is usually slightly higher than its quoted interest rate. APR exists specifically so borrowers can compare total cost across lenders on one number.
Why is my credit card debt growing faster than its APR suggests?
Because APR ignores compounding. A 24% APR is applied as 2% per month, and that interest compounds — the effective annual cost is (1 + 0.24/12)^12 − 1 ≈ 26.8%, not 24%. APR understates the true cost of revolving (carried) balances. The compounded figure is the APY / effective annual rate.
What is a good APR?
It depends entirely on the product and your credit. US credit cards typically run 18–29%; mortgages and auto loans track market rates and are far lower; the lowest APRs go to the highest credit scores. This explains the ranges, not what you should accept — that is a personal decision (consult a fiduciary).
What is the difference between fixed and variable APR?
Fixed APR stays constant over the life of the loan (common for personal loans and some cards). Variable APR is tied to an index — usually the Prime rate — plus a fixed margin, so it rises and falls when the Federal Reserve changes rates. A 0% intro APR is a temporary promotional fixed rate that reverts to a (often variable) go-to APR after the intro period.
Sources
We cite primary research, expert practice, and authoritative reference. Higher-tier sources weighted heavier. See methodology.
- T1US CFPB — "What is a credit card interest rate? What is APR?" — Authoritative consumer definition of APR + Truth in Lending disclosure
- T1US Federal Reserve — Regulation Z (Truth in Lending) — Legal basis for APR calculation + disclosure requirements
- T1US FTC — Consumer credit + borrowing basics — Government consumer-education on APR, fees, fixed vs variable
- T1Aswath Damodaran, NYU Stern — Nominal vs effective rate mechanics
Cite this page
de Vries, P. (2026). What is APR?. AskedWell. Retrieved 2026-05-29, from https://askedwell.com/pages/what-is/apr
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