Interest Rate vs APR
The interest rate is what you pay on the loan balance. APR includes the rate plus fees, expressed as an annual cost. Learn when APR is useful for comparison, when it misleads, and which number actually matters for your monthly payment.
The core difference
Interest rate (note rate)
The annual percentage charged on your loan balance. Used to calculate your monthly payment. Does not include fees.
APR (Annual Percentage Rate)
The interest rate plus certain fees, spread over the assumed loan life. A disclosure tool for comparing offers. Does not change your payment.
A worked example
Two lenders offer a $400,000, 30-year mortgage. Lender A offers 7.00% with $4,000 in origination fees. Lender B offers 7.10% with $0 in origination fees.
| Lender A | Lender B | |
|---|---|---|
| Interest rate | 7.00% | 7.10% |
| Origination fees | $4,000 | $0 |
| APR | 7.11% | 7.10% |
| Monthly payment | $2,661 | $2,674 |
| Better if holding 30 years | Lender A | |
| Better if holding 5 years | Lender B |
At 30 years, Lender A's lower monthly payment saves $13/month × 360 = $4,680 — more than the $4,000 upfront fee. At 5 years (60 payments), Lender A only saves $780 in payments but paid $4,000 upfront — a net loss of $3,220 vs Lender B. APR correctly flags Lender A as marginally more expensive when held to term, but cannot tell you which is better for your actual hold period.
What APR includes and excludes
Included in APR
- Origination/underwriting fees
- Discount points
- Mortgage broker fees
- PMI premiums (in some calculations)
- Prepaid interest at closing
Excluded from APR
- Appraisal fee
- Title insurance
- Attorney and settlement fees
- Recording fees
- Homeowners insurance prepaid
When to use rate, when to use APR
Use the interest rate to calculate your monthly payment, compare affordability at different loan sizes, and model amortization. The rate is the number that determines your cash flow.
Use APR when comparing two offers with the same loan amount, same term, and same expected hold period. A lower APR means lower total cost — but only if the hold period assumption is valid for you.
For short hold periods, ignore APR and compare: (a) the interest rate — which determines your payment for however long you hold — and (b) total closing costs out of pocket. The CFPB Loan Estimate form standardizes closing cost disclosure so you can compare lenders on an apples-to-apples basis.
Common questions
Which number determines my monthly payment — rate or APR?
Your monthly payment is calculated using the interest rate (also called the note rate), not the APR. APR is a disclosure metric — it spreads upfront fees over the assumed loan life to produce a higher annual percentage, but it does not change your actual payment. Use the interest rate to calculate your payment; use APR to compare the total cost of different loan offers.
What fees are included in APR?
The CFPB defines which fees must be included in APR under Regulation Z (Truth in Lending Act). Required inclusions: origination fees, discount points, broker fees, mortgage insurance premiums, and certain prepaid finance charges. Excluded: appraisal fee, title insurance, attorney fees, recording fees. The exclusions mean APR understates the true all-in cost — two loans with the same APR can have very different total closing costs.
When is APR misleading?
APR assumes you hold the loan for its full term (30 years for a 30-year mortgage). The longer you hold, the more the upfront fees are diluted — making APR look lower. If you sell or refinance in 5–7 years (the US average), the upfront fees are concentrated into a shorter period and the effective rate is much higher than the disclosed APR. For short hold periods, compare total closing costs directly rather than relying on APR.
What is a discount point and how does it affect rate vs APR?
A discount point is 1% of the loan amount paid at closing to permanently reduce the interest rate — typically by 0.25 percentage points per point. Paying points lowers the note rate and your monthly payment but raises APR (because the point fee is included in the APR calculation). The break-even on buying points at 7% rates is typically 4–6 years. If you will keep the loan longer, points reduce total cost; if shorter, avoid them.
Is APR the same in Canada?
Canada uses the Annual Percentage Rate concept under the Cost of Borrowing (Banks) Regulations, but Canadian mortgage APR calculations differ from US TILA requirements. Canadian lenders must disclose the effective annual rate (EAR) reflecting semi-annual compounding — the standard for Canadian mortgages under the Interest Act. The disclosed rate and effective rate differ, which is why a quoted 5.0% Canadian rate has a slightly different cost structure than a 5.0% US rate.