Mortgage Rate Guides

Straight, neutral explainers on how mortgage rates work — written by someone who spent two decades inside the business. No lead forms, no "get pre-approved," no spin. Just the mechanics, so you can read the market for yourself.

• Mortgage glossary
  Plain-English definitions of the terms on every rate sheet — APR, points, par, LTV, PMI, DTI and more.
• How we source our rates
  Exactly where our numbers come from, what we do and don't collect, and why we're a monitor, not a scraper.
• How mortgage rates are set
  Why your rate isn't the headline rate — the bond market, your file, and the lender's margin, explained.
• APR vs. interest rate
  The difference that actually costs you money — and when APR is (and isn't) the right number to compare.
• Are discount points worth it?
  What a point really buys, how to find your break-even, and why we benchmark the par (zero-point) rate.
• How to read a lender rate sheet
  An insider's tour of the document behind your quote — base price, add-ons, lock pricing, and the catches.

By L.W. Martin, Founder — 20 years in the mortgage business, including 15 running his own brokerage. About → · Updated August 2026.