When you’re shopping for a mortgage, it’s tempting to compare APRs — after all, that’s what the government designed APR for. The problem is that APR is one of the least reliable numbers in a mortgage quote. Here’s why, and what to look at instead.
What Is APR and Why Was It Created?
APR — Annual Percentage Rate — was designed to help consumers compare the true cost of a mortgage by rolling the interest rate and certain fees into a single number. The idea was that a lower APR would signal a lower overall cost, making it easier to shop lenders.
The intention was good. The execution has real problems.
Why APR Isn’t a Reliable Comparison Tool
APR is inconsistently calculated. Different lenders include different fees when computing it — some include origination charges, some don’t; some factor in mortgage insurance premiums, others omit them. Ask ten different loan officers to quote the same rate at the same cost, and you may get ten different APRs.
APR is also easily manipulated. A lender can advertise an eye-catching low APR by excluding certain fees from the calculation or by basing the quote on assumptions that won’t apply to your actual loan. This is a common tactic in online mortgage advertising.
Another issue: APR assumes you’ll keep the loan for its entire term — 30 years on a 30-year mortgage. If you refinance or sell in 7 years, which is closer to the average, the true cost picture looks very different. A loan with a slightly higher rate but lower upfront costs may be a better deal than a lower-rate loan with heavy discount points, depending on your time horizon.
What to Compare Instead
The most reliable way to compare mortgage quotes is to look at the interest rate alongside the net closing cost. Here’s what that means in practice:
Every mortgage rate comes with either a cost or a credit. A lower rate typically requires paying discount points — upfront fees that buy the rate down. A higher rate typically comes with a lender credit (also called rebate pricing) that offsets your closing costs. When you compare quotes, you want to see the full picture: what rate are you getting, and what are you paying (or receiving) to get it?
Your net closing cost is: origination charges + third-party fees − any lender credit. That number, paired with the interest rate, tells you far more than APR alone.
Practical Tips for Shopping Mortgage Rates
Use the Loan Estimate, not just the APR. When you apply with a lender, you’re legally entitled to receive a Loan Estimate within three business days. This standardized form shows the rate, all fees, the projected monthly payment, and the cash needed to close — in a format designed for comparison. It’s a much better shopping tool than APR.
Get quotes at the same time. Mortgage rates move throughout the day based on bond market activity — sometimes multiple times in a single day. A quote from Monday morning and one from Tuesday afternoon aren’t comparable. If you’re shopping multiple lenders, try to request quotes within the same window.
Compare the same lock period. A 15-day lock is priced differently than a 45-day lock. Make sure you’re comparing quotes with the same or similar lock periods appropriate to your timeline.
Don’t include prepaids and reserves in your cost comparison. Prepaid interest, homeowners insurance, and property tax reserves aren’t really “closing costs” — they’re money you’d be paying regardless of which lender you use. Focus on lender fees and third-party fees when comparing costs. (That said, do confirm that prepaids are being disclosed correctly.)
Give every lender the same information. Mortgage rates are priced based on your specific scenario — credit score, loan amount, property type, down payment, and more. If you give different information to different lenders, you’re not getting comparable quotes. Provide the same details to everyone.
Don’t ignore the rate in favor of low closing costs. A loan with a lender credit covering all your closing costs sounds great — but that credit comes from accepting a higher rate, which you’ll pay for every month you keep the loan. Run the numbers based on how long you expect to stay in the home or keep the mortgage.
The Bottom Line
APR was meant to simplify mortgage shopping, but in practice it creates more confusion than clarity. The better approach is straightforward: compare the interest rate, compare the net cost, and ask for a detailed written quote that shows you exactly what you’re paying and why.
It’s important to keep in mind that the lowest rate quote is not the whole picture of the service and guidance that you’ll receive throughout your transaction. Choosing a lender by the best rate quote alone doesn’t mean anything if that lender is not able to actually close your loan. In fact, I’ve rescued several borrowers at the last minute when the lender they originally selected for having the best quote was not able to perform.
If you’d like a detailed, transparent rate quote for a home purchase or refinance anywhere in Washington State, I’m happy to provide one — including the rate, all fees, and a full breakdown so you can compare with confidence.
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About Rhonda Porter
APR certainly does not tell the whole story. Other costs such as credit report fee and title insurance are normally not included in the calculation. So the loan with the lowest APR isn’t always the best deal.