How to Compare Mortgage Rates: A Complete Guide

Interest rate vs. APR: what you’re really comparing

When you compare mortgage offers, you’ll see two key numbers: the interest rate and the annual percentage rate (APR). They are related but measure different things. The interest rate is the cost of borrowing the principal, shown as a percentage. The APR includes the interest rate plus loan costs such as origination fees, discount points, and certain closing costs.

Comparing APRs is generally more accurate than comparing interest rates alone, because APR reflects the total cost of the loan over its term, not just the monthly payment. If two lenders quote the same interest rate but different APRs, the one with the lower APR likely has lower upfront fees or points.

• Interest rate: the base cost of borrowing.
• APR: includes the interest rate plus certain fees and points, giving a fuller cost picture.
• For an apples-to-apples comparison, look at the APR for the same loan type and term.

Sources: Consumer Financial Protection Bureau

Key factors that influence mortgage rates

Lenders set mortgage rates based on factors you control and factors you don’t. Your credit score, down payment size, loan type, and loan term are the borrower-controlled factors that matter most. A higher credit score and a larger down payment generally lead to a lower rate, because both reduce the lender’s risk. Shorter terms, such as a 15-year fixed mortgage, typically carry lower interest rates than longer terms like a 30-year fixed.

External economic conditions, including Federal Reserve policy and the overall economy, also affect mortgage rates. Additionally, the type of loan you choose—conventional, FHA, VA, or jumbo—will have a different rate, often because of differences in risk and mortgage insurance requirements.

• Credit score: higher scores generally mean lower rates.
• Down payment: larger down payments can reduce your rate.
• Loan term: 15-year fixed rates are typically lower than 30-year fixed rates.
• Loan type: conventional, FHA, VA, and jumbo loans have different rate structures.
• Economic conditions: Federal Reserve policy and broader market factors influence rates.

Sources: Consumer Financial Protection Bureau

How to compare offers: what to look for

The goal is to compare like with like. Get quotes from at least three lenders, and make sure each quote is for the same loan type and term. Then look at more than the monthly payment—review the APR, closing costs, and any points or fees that affect the total cost over time.

Rate shopping within a short period—typically 14 to 45 days—is treated as a single inquiry by most credit scoring models, so you can compare offers without worrying about your credit score dropping from multiple hard pulls.

A preapproval letter is a useful tool when comparing, but remember that it’s not a final commitment and is usually valid for 60 to 90 days. Use the preapproval to see what rate and terms you could qualify for, then compare that across lenders.

• Compare quotes for the same loan type (e.g., conventional 30-year fixed).
• Look at APR, not just the interest rate.
• Review closing costs and points.
• Shop within a 14–45 day window to protect your credit.
• Consider the total cost of the loan over time, not just the monthly payment.

Sources: Consumer Financial Protection Bureau, Bankrate

Common mistakes to avoid when comparing rates

One of the biggest mistakes is focusing solely on the interest rate and ignoring the APR and fees. A lower rate might come with higher closing costs that wipe out the savings. Another mistake is comparing different loan types or terms, like a 30-year fixed with a 5-year ARM; they aren’t apples-to-apples.

Also, be wary of paying points without calculating the break-even. Discount points lower your rate, but they add to your upfront costs. Only pay for points if you plan to stay in the home long enough for the monthly savings to exceed the cost.

• Don’t compare a 30-year fixed with a 15-year fixed or an ARM; the comparison must be apples-to-apples.
• Don’t ignore closing costs—they can offset a lower interest rate.
• Don’t assume a lower rate is always the best deal; evaluate total costs.
• Keep the timeline of your preapproval in mind when comparing offers – it’s valid for a limited time.

Sources: Consumer Financial Protection Bureau

Example scenario: comparing two offers

Both offers are for the same loan type and term, so you can compare them directly.

If you plan to stay in the home for more than 9 years, Lender B’s lower rate could save you money over time; if you expect to move sooner, Lender A might be the better deal despite the higher rate.

This example illustrates how the APR and closing costs matter when comparing offers. A lower interest rate is appealing, but you need to evaluate the total cost—including points and fees—and how long you plan to stay in the home to make the right choice.

• Both offers are for the same loan type and term, so the comparison is valid.
• Lender A has a higher rate but lower upfront costs; Lender B has a lower rate but charges points.
• The break-even period for the points is about 9 years, so your expected length of stay is crucial.
• Use the APR to get a sense of total cost, but also run the numbers with your own holding period.

Sources: Consumer Financial Protection Bureau, Bankrate

Side-by-side and decision-criteria matrix

When comparing mortgage offers, use a simple table to capture the key numbers. The following categories give you a framework for comparing lenders without relying on volatile current rates. Fill in the specifics from your own quotes.

For each lender, note the loan type, loan term, interest rate, APR, estimated closing costs, and total cost over the term. This makes it easier to spot differences that aren’t obvious from the rate alone.

Sources: Consumer Financial Protection Bureau