The percentage a lender charges you to borrow money, expressed as an annual rate. On a mortgage, the interest rate determines how much you pay the lender on top of repaying the original loan amount. Even small differences in interest rates matter significantly over time: on a $300,000 loan, a 0.5% rate difference changes your total interest paid by roughly $30,000 over 30 years. Your rate depends on your credit score, down payment, loan type, and market conditions.
Why It Matters
Your mortgage interest rate determines how much you pay to borrow money. Rates are influenced by the Federal Reserve's monetary policy, the bond market (specifically the 10-year Treasury yield), inflation expectations, and your personal financial profile. Even small rate differences have massive long-term impact — on a $300,000 loan, 0.25% higher rate costs an extra $53/month, or $19,000 over 30 years.
Your individual rate depends on: credit score (760+ gets the best tier), down payment (larger = lower rate), loan type (conventional vs FHA vs jumbo), property type (single-family gets the best rates), occupancy (primary residence vs investment), and whether you buy points. Shopping 3-5 lenders within a 14-day window can save 0.25-0.50% — that's $37,000-$75,000 over the life of a $300,000 loan.
Real-World Example
Impact of rate on a $300,000, 30-year loan: 6.0% = $1,799/mo ($347,515 interest). 6.5% = $1,896/mo ($382,633 interest). 7.0% = $1,996/mo ($418,527 interest). Going from 6.0% to 7.0% costs $197/month more and $71,012 more in total interest.
Pro Tip
Apply to at least 3 lenders on the same day. Use the lowest offer to negotiate with the others — lenders will often match or beat competing offers to win your business.