APR vs interest rate
Last updated: 2026-08-14
Borrow $20,000 over five years at 9% and the payment is about $415 a month. Add a 3% origination fee and you receive $19,400 while still repaying as though you borrowed $20,000. The rate is still 9%. The APR is about 10.3%.
Same loan, same payment, two different numbers — and only one of them tells you what the money actually costs.
What each number measures
The interest rate prices the borrowing itself. It is what generates the payment, and it is the only figure used to build the amortization schedule.
The APR is a comparison tool. It asks what single rate would produce this payment stream if you had received only the net amount, so it folds fees into an annualized figure. That is why it comes out higher whenever fees exist, and equal to the rate when they do not.
| $20,000 over 5 years | No fee | 3% fee |
|---|---|---|
| Interest rate | 9.00% | 9.00% |
| Cash received | $20,000 | $19,400 |
| Monthly payment | $415 | $415 |
| APR | 9.00% | ≈10.30% |
Which to compare on
Compare offers on APR. A 9% loan with a 3% fee is more expensive than a 10% loan with no fee, and only the APR makes that visible. Comparing headline rates is exactly how lenders with high fees win business.
But APR only includes the charges that are actually disclosed within it, and lenders do not all include the same items. On mortgages, some third-party costs sit outside the APR calculation entirely. Two APRs are comparable only when the fee sets behind them are.
Where APR misleads
It assumes you hold the loan to term. APR spreads upfront fees across the full schedule. Repay early and those fees are absorbed over fewer months, so your real cost is higher than the APR suggested. This matters most on mortgages, where the median borrower refinances or moves long before thirty years.
It says nothing about cash flow. A lower APR over a longer term can mean more total interest and a longer period in debt. APR ranks cost per year borrowed; it does not rank total cost.
On credit cards it excludes fees entirely. Card APR is just the interest rate annualized. Annual fees and transfer fees sit outside it.
Work out the real cost
The APR calculator models an annualized cost including upfront and financed fees. The loan comparison calculator puts two offers side by side on payment, total interest and total cost, and the mortgage APR calculator handles the home-loan case.
Related reading: personal loan payment factors.
How fees move the APR
APR exists because two loans at the same stated rate are not the same loan if one charges a fee up front. The size of the gap depends on the fee and on how long the loan runs.
| Upfront fee | Cash you receive | Monthly payment | Approximate APR |
|---|---|---|---|
| None | $20,000 | $396 | 7.00% |
| 1% ($200) | $19,800 | $396 | 7.44% |
| 3% ($600) | $19,400 | $396 | 8.34% |
| 5% ($1,000) | $19,000 | $396 | 9.27% |
The payment never changes because the fee did not change what you repay, only what arrived. That is precisely the distortion APR is designed to expose.
Common questions
Which number should I compare offers on?
APR, in most cases. It folds certain fees into a single annualised figure, so it is the fairer basis for comparing two offers with different fee structures.
Why is APR higher than the interest rate?
Because upfront fees reduce what you actually receive without reducing what you repay. The same repayments against a smaller advance imply a higher effective rate.
Can a lower APR still be the worse deal?
Yes, if you will not keep the loan long enough to recover the upfront fees that bought the lower rate. APR assumes you hold the loan to term.
Does APR include everything?
No. Which fees must be included is defined by regulation and excludes several real costs. Two lenders can compute APR correctly and still not be perfectly comparable.
Related reading
The rest of this series, and the calculators that let you run the idea on your own numbers.
More loan guides
Try it with your figures
See also all guides, every calculator, and the calculation methodology behind these estimates.