What Is a Mortgage Interest Rate?
A mortgage interest rate is the yearly percentage a lender charges to borrow money for a home. The rate is expressed as a yearly figure but applied each month to the remaining loan balance, so it determines how much of your monthly payment goes to the lender as interest and how much pays down what you owe.
Today, an Opendoor Home Loans 30-year fixed mortgage in Colorado is quoting at …. The rate is one of two numbers a lender will quote you. The other is APR, which adds the lender's fees on top. For the full breakdown of how those numbers differ, see APR explained.
The Basics
- A mortgage interest rate is the yearly percentage a lender charges to borrow money for a home.
- Interest is charged monthly on the remaining balance, so most of an early payment goes to interest, not principal.
- Your rate depends on your credit score, down payment, loan type, points, and the timing of your rate lock.
- The interest rate covers borrowing the principal; APR adds the lender's fees and is always equal to or higher.
How Does Mortgage Interest Work?
Mortgage interest is charged monthly on the remaining balance of your loan. Each month, the lender multiplies the outstanding balance by one-twelfth of your yearly interest rate, and that figure is the interest portion of your payment. Everything left over goes to principal.
For a quick illustration, take a $400,000 30-year fixed mortgage at a hypothetical 6.25% rate. The monthly payment, principal and interest only, comes out to about $2,463. In the very first month, roughly $2,083 of that payment is interest and only about $380 goes to principal. By year 15, the split has flipped: more of every payment goes to the loan balance than to the lender.
Compare that to the same loan at a 7.25% rate. The monthly payment jumps to about $2,728, a difference of $265 a month, or close to $95,000 in extra interest over the full 30 years. These are illustration numbers, not quotes; a one-percentage-point change in rate moves real money.
That math is true for fixed-rate mortgages. Adjustable-rate loans work differently because the rate can change after an initial fixed period. For the full picture, see adjustable-rate mortgages.
What Affects Your Mortgage Interest Rate?
Your interest rate is shaped by two categories of factors: things you can influence and things you cannot.
What you can influence
- Credit score. Higher scores qualify for lower rates because they signal a lower default risk to lenders.
- Down payment and loan-to-value. A larger down payment lowers the loan-to-value ratio, which lenders price favorably.
- Loan size, term, and type. Shorter terms generally carry lower rates than 30-year fixed loans. Government-backed loans like FHA and VA price differently from conventional loans.
- Discount points. You can pay discount points upfront to buy your rate down. Each point is roughly 1% of the loan amount and typically lowers the rate by 0.25%.
- When you lock. Rates move daily. Locking freezes today's quote for a set window. For how locks work, see mortgage rate lock.
For an in-depth guide on which of these levers move your rate the most, see ways to lower your mortgage rate.
What you cannot influence
- Federal Reserve policy. The Fed sets short-term rates that influence the broader credit market.
- Inflation. Higher inflation generally pushes mortgage rates up because lenders need a return that outpaces inflation.
- The bond market. Mortgage rates track the 10-year Treasury yield closely, since mortgage-backed securities compete with Treasuries for investor capital.
- Lender margins and operating costs. Each lender adds a margin to cover their own costs and target return.
First-time home buyer rates
There is no automatic "first-time buyer rate" that lenders apply at quote time. Some programs do offer a rate discount to eligible first-time buyers. The FHFA loan-level pricing adjustment is the most common example, lowering the base rate for buyers who meet income and property requirements.
Mortgage Interest Rate vs APR
The interest rate is the cost of borrowing the loan principal. APR adds the lender's fees and prepaid interest to that rate and expresses the total as a single yearly percentage, so APR is always equal to or higher than the interest rate. According to the CFPB, APR is "a broader measure of the cost of borrowing money than the interest rate."
Use the interest rate to figure your monthly payment. Use APR to compare two offers from different lenders side by side. For the full breakdown of which fees count toward APR and which do not, see APR explained.
How to Lock or Lower Your Rate
Locking your rate. A rate lock freezes today's quote for a fixed window, commonly 30 to 60 days, so it cannot drift up before closing. If rates fall during the lock, most lenders will not match the lower rate without a relock fee. For how lock periods work and when to time one, see mortgage rate lock.
Lowering your rate. The biggest levers are credit score, down payment, loan type, discount points, and shopping multiple lenders for the same loan. Each lender prices risk and margins differently, so the same borrower can receive meaningfully different rates on the same day. For a step-by-step on each lever, see ways to lower your mortgage rate.
You can see Opendoor Home Loans' live 30-year fixed quote for Colorado at the top of this page, and side-by-side with the APR using the rate display above.
Common Questions About Mortgage Interest Rates
Common questions about how mortgage interest rates work, how they compare to APR, and what affects the rate you are offered.
