How to use APR Calculator
This APR calculator reveals the true annual cost of a loan by folding upfront fees into the interest rate. A loan can advertise a low nominal rate yet cost much more once origination and other fees are added, so the annual percentage rate gives you a fairer basis for comparison. Enter the loan amount, nominal rate, term and fees to see the APR, the monthly payment and the total interest you will pay.
- Enter the loan amount you intend to borrow.
- Enter the nominal (quoted) interest rate.
- Set the loan term in months.
- Add any upfront fees such as origination or processing charges.
- Compare the resulting APR against the nominal rate.
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How APR differs from the interest rate
The nominal interest rate is the cost of borrowing the principal alone, while the APR also accounts for upfront fees spread across the life of the loan. The calculator first finds the monthly payment using the nominal rate, then solves for the rate that makes the present value of those payments equal to the amount you actually received after fees. Because you got less cash but repay the same schedule, the effective rate — the APR — is higher whenever fees are involved.
| Scenario | Nominal rate | APR |
|---|---|---|
| No fees | 5.00% | 5.00% |
| $500 fees on $10k | 5.00% | above 6% |
| Higher fees | 5.00% | higher still |
Using APR to compare loan offers
APR lets you compare loans with different fee structures on equal footing, which is why lenders are required to disclose it. A loan with a slightly higher nominal rate but no fees can beat a lower-rate loan loaded with charges. Note that spreading fees over a longer term lowers their annual impact, so APR also depends on the term. Always compare APRs for loans of the same length, and read the fine print to confirm which fees are included.
Worked examples
No fees
Inputs: $10,000 · 5% · 60 mo · $0
Result: APR equals 5%
With fees
Inputs: $10,000 · 5% · 60 mo · $500
Result: APR above 6%
Glossary
- APR
- Annual percentage rate — the yearly cost of a loan including fees.
- Nominal rate
- The quoted interest rate on the principal, excluding fees.
- Origination fee
- An upfront charge for processing and setting up a loan.
- Present value
- The current worth of future payments discounted at a given rate.
- Total interest
- The sum of all interest paid over the life of the loan.
Related reading
Frequently Asked Questions
Why use APR Calculator?
- Folds upfront origination and processing fees into the rate to reveal the true annual cost
- Two-loan comparison mode lets you pick the better deal on APR, not just the nominal rate
- Shows how a shorter term amplifies fee impact while a longer term spreads and dilutes it
- Monthly payment displayed alongside APR so you see both the rate and the repayment obligation
Common use cases
- Compare a 5% loan with a $1,000 origination fee against a 5.5% no-fee offer on APR
- Verify that a mortgage lender's disclosed APR is consistent with the rate and fees quoted
- Calculate the effective annual cost of a short-term loan that charges a flat origination fee
- Check whether a car dealership financing offer beats a pre-approved bank rate on APR
- Understand how refinancing closing costs roll into the APR on a new mortgage
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