What a mortgage rate actually is

A mortgage rate is the percentage of interest you pay on the money a bank lends you to buy a home. If you borrow $300,000 at a 6% rate, you pay 6% of that balance each year in interest—on top of paying back the principal itself. The rate determines how much your monthly payment will be and how much you'll pay in total over the life of the loan.

Banks don't set rates in a vacuum. They're influenced by the Federal Reserve's decisions about short-term interest rates, what it costs the bank to borrow money wholesale, and how much profit the bank wants to make on the loan. Your personal rate depends on those market conditions plus your own financial situation—your credit score, down payment size, income, and the type of loan you choose.

Key Takeaways

  • Your mortgage rate is the yearly interest percentage you pay on borrowed money, and it directly affects your monthly payment amount and total cost over time.
  • Banks base rates on Federal Reserve policy, their own borrowing costs, and profit margins, then adjust them up or down based on your credit score and down payment.
  • A 0.5% difference in rate can change your monthly payment by $150 to $250 on a typical loan, so shopping between lenders matters.
  • Fixed rates stay the same for the entire loan term, while adjustable rates start lower but can rise after an initial period, changing your payment unpredictably.
  • Rates change daily based on market conditions, so the rate you see quoted today may not be the rate you lock in tomorrow.

Why rates change every day

Mortgage rates move because the broader bond market moves. Banks fund mortgages partly by selling mortgage-backed securities to investors. When those investors demand higher returns—usually because they can get better rates elsewhere—banks raise mortgage rates to stay competitive. When demand for bonds is high and investors accept lower returns, mortgage rates fall.

The Federal Reserve influences this indirectly. When the Fed raises its benchmark interest rate, it becomes more expensive for banks to borrow, and mortgage rates typically rise. When the Fed cuts rates, borrowing becomes cheaper, and mortgage rates usually fall. But the connection isn't automatic or immediate. A Fed rate cut doesn't may provide your mortgage rate will drop the same day.

Economic data also moves rates. Reports on inflation, unemployment, and housing starts can shift investor expectations about the economy's direction, which changes what they're willing to pay for mortgage bonds. A strong jobs report might push rates up; weak inflation data might push them down.

How your credit score and down payment change your rate

Two borrowers offered a mortgage on the same day at the same bank will often receive different rates. The difference comes from your financial profile. A borrower with a 750 credit score and a 20% down payment might receive a 6.0% rate, while a borrower with a 650 score and a 5% down payment might receive 6.5% for the same loan type.

Credit score matters because it predicts whether you'll repay the loan. A higher score means lower risk to the bank, so they charge less interest. The difference between a 620 score and a 740 score can be 0.5% to 1% in rate—which translates to $100 to $250 more per month on a $300,000 loan.

Down payment size matters for the same reason. A larger down payment means you're borrowing less relative to the home's value, so the bank's risk is lower. It also means you have more skin in the game—you're less likely to walk away if the market turns. A 20% down payment typically gets you a better rate than a 5% down payment, sometimes by 0.25% to 0.5%.

Fixed rates versus adjustable rates

A fixed-rate mortgage locks your interest rate for the entire loan term—typically 15, 20, or 30 years. Your monthly payment never changes. You know exactly what you'll pay every month for decades. This predictability costs you: fixed rates are usually higher than the starting rate on an adjustable loan, because the bank is taking on the risk that rates will rise and they'll be stuck with a below-market rate.

An adjustable-rate mortgage (ARM) starts with a lower rate for an initial period—often 3, 5, 7, or 10 years—then adjusts periodically based on market conditions. After the fixed period ends, your rate might rise to 7%, 8%, or higher, and your payment rises with it. ARMs are riskier because you don't know what your payment will be in year 6 or year 11. They make sense only if you plan to sell or refinance before the rate adjusts, or if you can afford a significantly higher payment if rates spike.

Most first-time homebuyers choose fixed-rate mortgages because the payment certainty outweighs the slightly higher starting rate. ARMs are more common among investors or borrowers who know they'll move within a few years.

Why the same rate quote doesn't lock in your rate

When a bank quotes you a rate, that quote is usually good for 3 to 7 days—not permanently. The quote reflects market conditions on that day. If rates rise before you formally apply, your quote expires and you'll receive a new one at the higher rate. If rates fall, you can ask for the lower rate, but the bank isn't obligated to honor the old quote.

To lock in a rate, you must formally request a rate lock, usually after you've submitted a full application and the bank has ordered an appraisal. A rate lock agreement guarantees that your rate won't change even if market rates rise between now and closing—typically for 30, 45, or 60 days. Rate locks cost money: the bank charges a fee, usually 0.25% to 0.5% of the loan amount, to protect itself against rate movements while your loan is being processed.

Some lenders offer a "float down" option, which lets you lock in a rate but still benefit if rates fall before closing. This costs more than a standard lock but gives you protection in both directions.

How to compare rates between lenders

Rates vary between banks, credit unions, and mortgage brokers—sometimes by 0.25% or more on the same day. Shopping around is worth the effort because that difference compounds over 30 years. A 0.25% difference on a $300,000 loan adds up to roughly $50,000 in extra interest over the life of the loan.

When you compare, ask each lender for the same information: the interest rate, the annual percentage rate (APR), the loan term, and the total fees. The APR includes the interest rate plus closing costs spread across the loan term, so it's a more complete picture than the rate alone. A lender quoting a lower rate but charging $5,000 more in fees might actually be more expensive overall.

Get quotes from at least three lenders within a short window—ideally the same day or within 24 hours—so the rates are comparable. Multiple rate inquiries within 14 days count as a single inquiry on your credit report, so shopping around doesn't hurt your credit score.

What happens to your rate after you close

Once you close on a fixed-rate mortgage, your rate is locked for the life of the loan. Market rates can rise or fall, but your payment stays the same. This is why refinancing exists: if rates fall significantly below your current rate, you can take out a new loan to pay off the old one at the lower rate. You'll pay closing costs again, so refinancing only makes sense if the rate drop is large enough to offset those costs—usually at least 0.5% to 1%.

If you have an adjustable-rate mortgage, your rate will adjust on the schedule specified in your loan documents. The new rate is typically tied to a market index (like the Secured Overnight Financing Rate) plus a margin the bank adds. Your loan documents will specify caps on how much the rate can rise per adjustment period and over the life of the loan, but those caps can still result in significant payment increases.

Frequently Asked Questions

Can I get a better rate if I wait for rates to drop?

Nobody can predict when rates will drop or if they will at all. Waiting costs you: if rates rise instead, you'll pay a higher rate on a higher home price, since homes typically appreciate over time. If rates do fall later, you can refinance, but you'll pay closing costs again. Most financial advisors recommend locking in a rate you can afford now rather than gambling on future drops.

What's the difference between APR and interest rate?

The interest rate is just the percentage you pay on the loan balance. The APR includes the interest rate plus closing costs, origination fees, and other charges, expressed as a yearly percentage. APR gives you a more complete picture of what the loan actually costs, so it's useful for comparing lenders. However, APR assumes you keep the loan for the full term, which most borrowers don't.

Does paying a higher down payment lower my rate?

Yes, typically by 0.25% to 0.5%. A 20% down payment usually gets a better rate than a 10% down payment on the same day at the same lender. However, the math isn't always in your favor: if you have to deplete savings to make a larger down payment, you might be better off putting down less and keeping cash reserves for emergencies or home repairs.

Why do banks offer different rates to different people on the same day?

Banks price risk individually. Your credit score, down payment size, debt-to-income ratio, loan type, and property type all affect the rate you receive. A borrower with excellent credit and a large down payment is less risky than one with fair credit and a small down payment, so the bank charges less interest to the lower-risk borrower.

What's a good mortgage rate right now?

Rates change daily and vary by lender, loan type, and your financial profile, so there's no single "good" rate. The best approach is to get quotes from multiple lenders and compare the total cost—interest rate plus fees—over the life of the loan. A rate that's good for someone with a 750 credit score and 20% down may not be available to someone with a 650 score and 5% down.