What a mortgage is and why the rate matters

A mortgage is a loan you take out to buy a house or other property. You borrow money from a bank, credit union, or mortgage lender, and you pay it back over time—usually 15 to 30 years—with interest. The property itself serves as collateral, meaning the lender can take it back if you stop paying.

The mortgage rate is the percentage of interest you pay on top of the loan amount. A rate of 6 percent means you pay 6 percent of what you borrowed each year in interest charges. Even a difference of half a percent between one rate and another can cost you tens of thousands of dollars over the life of the loan, which is why shopping for rates matters.

Mortgage rates change constantly based on economic conditions, and they vary from lender to lender. Your personal situation—your credit score, down payment size, income, and debt—also affects what rate you are offered. Understanding how rates work and what influences them helps you know what to expect when you start looking.

Key Takeaways

  • Mortgage rates depend on both the broader economy and your personal finances, including your credit score and how much money you put down.
  • A fixed-rate mortgage keeps the same interest rate for the entire loan period, while an adjustable-rate mortgage (ARM) starts lower but can increase after a set time.
  • Lenders pull your credit report, verify your income, and assess your debt-to-income ratio before offering you a rate.
  • You can lock in a rate for a set number of days while you shop for a home, which protects you if rates rise during that period.
  • The annual percentage rate (APR) includes not just interest but also fees and closing costs, so comparing APRs between lenders gives you a fuller picture than comparing rates alone.

Fixed-rate versus adjustable-rate mortgages

A fixed-rate mortgage charges you the same interest rate for the entire loan. If you lock in 6 percent, you pay 6 percent for all 30 years. Your monthly payment stays the same, which makes budgeting predictable. Most people choose fixed-rate mortgages because they do not have to worry about rates rising later.

An adjustable-rate mortgage (ARM) starts with a lower rate for a set period—often 3, 5, 7, or 10 years—then adjusts periodically based on market conditions. After the initial period ends, your rate and monthly payment can go up (or occasionally down). ARMs are riskier because you might face much higher payments later, but they can save money if you plan to sell or refinance before the rate adjusts.

Most first-time homebuyers choose fixed-rate mortgages because the predictability outweighs the initial savings of an ARM. If you are considering an ARM, make sure you understand when the rate adjusts, what the maximum rate can be, and whether you can afford payments if rates hit that cap.

What lenders look at when setting your rate

Lenders assess your risk before offering you a rate. The main factors are your credit score, your down payment, your debt-to-income ratio, and the loan-to-value ratio (how much you are borrowing compared to the home's value).

A higher credit score typically gets you a lower rate because it signals you have paid past debts on time. A larger down payment also lowers your rate—putting down 20 percent instead of 5 percent shows you have skin in the game and reduces the lender's risk. Your debt-to-income ratio compares your monthly debt payments to your gross monthly income; lenders usually want this below 43 percent. If you already carry car loans, student loans, or credit card debt, a high ratio can push your mortgage rate up or disqualify you entirely.

Lenders also verify your income through tax returns, W-2 forms, and pay stubs. Self-employed borrowers may need two years of tax returns. The type of property matters too—a single-family home typically gets a better rate than an investment property or a condo in a building with few owner-occupants.

How the broader economy affects rates

Mortgage rates move with the broader economy and are influenced heavily by the Federal Reserve's decisions about short-term interest rates. When the Fed raises rates to fight inflation, mortgage rates typically rise. When the Fed lowers rates to stimulate the economy, mortgage rates often fall—though not always in lockstep.

Bond markets also drive mortgage rates. Mortgage lenders often sell mortgages to investors, and the price they can get for those mortgages depends on what investors will pay. When investors are nervous about the economy, they demand higher rates to compensate for risk. When confidence is high, rates can drop even if the Fed has not changed its stance.

This is why you might see mortgage rates rise even when the Fed has not moved, or fall when economic news is bad. Rates can shift daily or even multiple times per day. If you are shopping for a mortgage, checking rates from multiple lenders on the same day gives you a real comparison; checking one lender today and another next week does not.

Rate locks and how they work

Once a lender quotes you a rate, you can lock it in for a set number of days—typically 30, 45, or 60 days. During that lock period, your rate will not change even if market rates rise. This protects you while you shop for a home and go through the underwriting process.

If rates fall during your lock period, you are stuck with the higher rate you locked in. If rates rise, you benefit from the lock. Some lenders offer a "float down" option that lets you take advantage of a rate drop, but this usually costs extra or comes with a shorter lock period.

Your lock expires if you do not close on the home by the end date. If you need more time, you can ask to extend the lock, though lenders may charge a fee or offer a slightly higher rate for the extension. It is important to understand your lock terms before you sign, because missing the important date can be expensive.

Understanding APR versus interest rate

The interest rate is just the cost of borrowing the money. The annual percentage rate (APR) includes the interest rate plus other costs: origination fees, discount points, appraisal fees, title insurance, and closing costs. The APR gives you a more complete picture of what the loan actually costs.

A lender might quote you a 6 percent interest rate but a 6.2 percent APR because of fees. When comparing offers from different lenders, comparing APRs is more useful than comparing rates alone, because it accounts for the full cost. However, the APR does not include property taxes, homeowners insurance, or HOA fees, which vary by location and property.

Lenders are required to provide you with a Loan Estimate within three business days of your process. This document shows the interest rate, APR, estimated monthly payment, and all fees. Comparing Loan Estimates from multiple lenders is the best way to see which offer is actually cheapest.

Points and how they affect your rate

Discount points (or just "points") are fees you pay upfront to lower your interest rate. One point typically costs 1 percent of the loan amount and lowers your rate by about 0.25 percent, though this varies by lender and market conditions. If you are borrowing $300,000, one point costs $3,000 and might lower your rate from 6 percent to 5.75 percent.

Paying points makes sense if you plan to stay in the home long enough to recoup the upfront cost through lower monthly payments. If you plan to sell or refinance in five years, paying points might not be worth it. Your lender can calculate the "break-even point"—how many months it takes for your monthly savings to equal what you paid upfront.

Some lenders also offer the opposite: you can accept a slightly higher rate in exchange for the lender paying some of your closing costs. This is called a "lender credit" and is useful if you do not have cash for closing costs but plan to stay in the home long enough that the higher rate does not cost you more overall.

Frequently Asked Questions

What credit score do I need to get a mortgage?

Most conventional lenders require a credit score of at least 620, but scores of 740 or higher typically get the best rates. FHA loans (backed by the Federal Housing Administration) may accept scores as low as 580. Your score is just one factor; lenders also look at your down payment, income, and debt.

Can I get a mortgage with bad credit?

Yes, but you will likely pay a higher rate and may need a larger down payment. FHA loans are designed for borrowers with lower credit scores and smaller down payments. Some credit unions and lenders specialize in working with people rebuilding credit. The higher rate means you pay more over time, so improving your credit before explore can save you money.

What happens if rates drop after I lock in?

If you have a standard rate lock, you are stuck with the locked rate. Some lenders offer a "float down" option that lets you take a lower rate if the market rate falls, but this usually costs extra or comes with a shorter lock period. Ask your lender about this option before you lock.

How often do mortgage rates change?

Rates can change daily or even multiple times per day based on market conditions. They are not set by any single authority; different lenders quote different rates at any given moment. This is why shopping around and getting quotes from multiple lenders on the same day matters.

What is the difference between prequalification and preapproval?

Prequalification is an informal estimate based on information you provide; it does not involve a credit check and is not binding. Preapproval involves a full process, credit check, and income verification, and gives you a firm rate quote and loan amount. Preapproval carries more weight when you make an offer on a home.