What Is APR (Annual Percentage Rate)?
APR, or Annual Percentage Rate, is the true annual cost of borrowing money expressed as a percentage. Unlike the interest rate — which only reflects the cost of borrowing the principal — APR folds in most lender fees and charges, giving you a single number that makes comparing mortgage offers far more accurate.
APR vs. Interest Rate: What's the Difference?
The interest rate on a mortgage determines your monthly principal and interest payment. It does not account for anything else you pay to get that loan. APR includes the interest rate plus most upfront costs rolled into an effective annual rate. Because of those added costs, the APR on a mortgage is almost always higher than the stated interest rate.
The key distinction: the interest rate tells you what your payment will be each month. The APR tells you what the loan actually costs you over its full term, making it the right number to use when comparing competing loan offers.
What Does APR Include?
Federal law under the Truth in Lending Act (TILA) and its implementing regulation, Regulation Z, defines exactly which fees must be included in APR. For mortgages, these typically include:
- The base interest rate
- Origination fees and underwriting fees charged by the lender
- Discount points (prepaid interest to buy down the rate)
- Mortgage broker fees
- Certain prepaid finance charges
APR does not include private mortgage insurance (PMI), property taxes, homeowners insurance, or most third-party fees such as appraisal and title charges. Those costs affect your total monthly payment but are excluded from the APR calculation.
To understand how mortgage points affect your rate and overall cost, see What Is a Mortgage Point?
Why APR Is Higher Than the Interest Rate
Suppose you borrow $300,000 at a 7.00% interest rate, but you also pay $3,000 in origination fees to get that loan. Those fees effectively reduce the amount of money you have available while the lender still charges interest on the full $300,000. When the fee is spread across the life of the loan and expressed as an annual rate, it pushes the effective cost above 7.00% — resulting in an APR that might land around 7.15% to 7.20%, depending on loan term and exact fee structure.
The longer the loan term, the smaller the APR impact of a fixed upfront fee. A $3,000 fee spread over 30 years has a much smaller per-year effect than the same fee on a 10-year loan.
How to Use APR to Compare Loan Offers
When lenders compete for your business, they often lead with different combinations of rate and points. One lender may offer a lower rate in exchange for paying points upfront; another may offer a higher rate with no points. APR normalizes these differences so you can compare them on equal footing.
The table below illustrates a real-world comparison:
| Loan Offer | Interest Rate | Points / Fees | APR |
|---|---|---|---|
| Loan A | 6.75% | 1 point ($3,000 on $300K) | 7.12% |
| Loan B | 7.00% | 0 points | 7.08% |
Despite Loan A having the lower interest rate, Loan B actually has the lower APR once the upfront point cost is factored in. If you plan to keep the loan for its full term, Loan B is the better deal — even though its monthly payment will be slightly higher.
Use the FHA Loan Calculator to model how different rate and fee combinations affect your total loan cost.
When APR Can Be Misleading
APR is most useful when comparing loans of the same type and term that you plan to hold for their full life. It becomes less reliable in two common situations:
Short holding periods: If you sell or refinance before the break-even point on your upfront fees, you never recover the cost of those fees. In that case, a loan with a higher rate but lower fees may actually cost you less in total, even though its APR appears worse.
Adjustable-rate mortgages (ARMs): The APR disclosed for an ARM is calculated using assumptions about how the rate will adjust in the future. Those assumptions are specified by Regulation Z and may not match what actually happens to rates. ARM APRs should be treated as estimates, not guarantees.
For fixed-rate, full-term loans, APR is a reliable and legally standardized comparison tool. For everything else, look at the total interest paid and factor in your expected time in the home.
Source: CFPB — Truth in Lending Act / Regulation Z: Understanding APR on mortgage loans
This definition is for informational purposes only and does not constitute financial advice.