Understanding Mortgage Rates
What drives mortgage rates, how points work, and when to lock — plus how a 0.5% rate difference affects a 30-year loan.
What rates are tied to
The 30-year fixed rate loosely tracks the 10-year Treasury yield plus a spread. Fed policy, mortgage-backed security demand, and lender pipelines all move rates day-to-day.
The math of a 0.5% difference
On a $400,000 loan, moving from 7.00% to 6.50% saves about $132/month and $47,000 over 30 years.
Frequently asked questions
Should I buy points?
Only if you plan to stay in the home longer than the breakeven period — usually 5–7 years.
Bottom line
Understanding understanding mortgage rates is one of the highest-leverage things you can do for your financial future. Bookmark this guide, share it with a friend, and use the calculators linked below to run the math on your own numbers. Money decisions are rarely urgent, but they compound — so a good decision today easily becomes an outsized win a decade from now.
Related articles
Mortgage Affordability Guide
First-Time Homebuyer Checklist
Reader comments (3)
This finally cleared up something my previous advisor kept hand-waving. Bookmarking.
Would love a follow-up piece on how this changes for self-employed households.
Really appreciate that you cited primary sources — most sites don’t.