Interest Rates, Explained
Mortgage rates are quoted everywhere, but the headline number isn't the whole story. Understanding the difference between rate, APR, and the structure of your loan helps you compare offers honestly.
Fixed-rate vs adjustable-rate
Fixed-rate mortgages keep the same interest rate for the entire loan term. Predictable, simple, and the most common choice.
Adjustable-rate mortgages (ARMs) start with a fixed period (commonly 5, 7, or 10 years), then adjust periodically based on a benchmark index.
ARMs can make sense if you expect to move or refinance before the fixed period ends — but the risk is real if rates rise.
Rate vs APR
Interest rate is the cost of borrowing the principal — what's used to calculate your monthly payment.
APR (annual percentage rate) includes the interest rate plus most lender fees, expressed as a yearly cost.
When comparing offers, APR gives a more apples-to-apples view of total cost.
What actually moves your rate
Credit score, loan-to-value ratio, and loan type are the biggest personal factors.
Broader market forces — Fed policy, inflation, the 10-year Treasury yield, and mortgage-backed security demand — set the baseline.
Discount points let you pay upfront to lower your rate. Worth it only if you'll keep the loan long enough to break even.
Key takeaways
- Fixed for stability, ARM for flexibility — choose based on your timeline.
- Compare APR, not just rate, when you have multiple offers.
- Points are a math problem: calculate your break-even before paying them.
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