How Mortgage Rates Work (and How to Get the Best One)

Your mortgage rate is the single biggest factor in what your home actually costs. On a $400,000 loan, the difference between 6.5% and 7.0% is $134 per month and over $48,000 in total interest over 30 years. That half-point gap is worth more than most home renovations.

Yet most buyers accept whatever rate their first lender offers. Understanding how rates are set, what moves them, and how to position yourself for the best one puts real money back in your pocket.

What is a mortgage rate?

A mortgage rate is the interest a lender charges you to borrow money for a home purchase or refinance. It’s expressed as an annual percentage of your loan balance.

Two numbers matter:

Interest rate. The base cost of borrowing. This is what determines your monthly principal and interest payment.

APR (annual percentage rate). The interest rate plus lender fees, points, and other costs, expressed as a yearly rate. APR gives you a truer picture of the total cost of the loan and is the better number for comparing offers across lenders.

A lender offering 6.5% with $4,000 in fees may cost more than one offering 6.625% with $1,500 in fees. The APR captures that difference.

What determines mortgage rates

Mortgage rates are influenced by forces at three levels: the economy, the lender, and you.

Macroeconomic factors (what moves the market)

The Federal Reserve. The Fed doesn’t set mortgage rates directly. It sets the federal funds rate, which is the overnight rate banks charge each other. This influences short-term rates and signals the Fed’s economic outlook. When the Fed cuts rates, mortgage rates often (but not always) follow. The relationship is indirect and sometimes counterintuitive.

The 10-year Treasury yield. This is the single best predictor of where 30-year mortgage rates are headed. Mortgage-backed securities compete with Treasury bonds for investor dollars, so mortgage rates tend to track the 10-year yield with a spread of roughly 1.5 to 2.5 percentage points. As of late March 2026, the 10-year yield sits around 4.25%, which corresponds to 30-year fixed rates in the low-to-mid 6% range.

Inflation. When inflation rises, investors demand higher yields on long-term bonds to preserve purchasing power. That pushes mortgage rates up. When inflation cools, rates tend to ease. The Fed’s 2% inflation target remains the key benchmark.

The bond market and investor demand. Mortgages are bundled into mortgage-backed securities (MBS) and sold to investors. When demand for MBS is strong, rates come down. When investors sell MBS (often during economic uncertainty or Treasury selloffs), rates rise.

Economic data. Jobs reports, GDP growth, consumer spending, and housing market data all influence rate direction. Strong economic data tends to push rates up (less need for stimulus). Weak data tends to pull them down.

Lender-level factors (how your rate is priced)

Loan type. Conventional, FHA, VA, and USDA loans each carry different rate structures. VA loans typically offer the lowest rates because they’re government-backed with no PMI. FHA rates are competitive but come with mandatory mortgage insurance. Conventional rates depend heavily on your credit profile.

Loan term. Shorter terms mean lower rates. A 15-year fixed mortgage typically runs 0.5% to 0.75% below a 30-year fixed because the lender’s money is at risk for half as long.

Fixed vs. adjustable. Adjustable-rate mortgages (ARMs) start with a lower rate than fixed-rate loans because you’re accepting the risk that the rate may increase later. A 5/1 ARM might start 0.5% to 1.0% below the 30-year fixed rate, but it resets annually after the initial five-year period.

Discount points. One point equals 1% of your loan amount and typically buys your rate down by about 0.25%. On a $400,000 loan, one point costs $4,000 and saves roughly $67 per month. Break-even: about 60 months. Points make sense if you’re staying long-term.

Lender margin. Every lender adds its own margin on top of market rates to cover costs and profit. This is why the same borrower can get meaningfully different quotes from different lenders on the same day. Operational efficiency directly affects this margin, which is why AI-powered lenders can often offer lower rates.

Borrower-level factors (what you control)

Credit score. This is the single biggest factor in your individual rate. On a $250,000 loan, the spread between the best (760+) and worst (620–639) credit tiers is roughly $169 per month, or nearly $61,000 in total interest over 30 years.

Credit score	Approximate rate	Monthly payment ($250K)
760–850	6.92%	$1,654
700–759	7.23%	$1,702
680–699	7.33%	$1,719
660–679	7.40%	$1,732
640–659	7.56%	$1,758
620–639	7.93%	$1,823

Down payment and LTV. A larger down payment means a lower loan-to-value ratio, which reduces lender risk and gets you a better rate. Putting 20% down also eliminates PMI on conventional loans. Below 20%, expect a rate premium plus mortgage insurance.

Debt-to-income ratio. Lenders prefer DTI below 36%, though many will go up to 43% or even 50% with strong compensating factors. A lower DTI signals that you have room in your budget to handle the payment, which can translate to better rate offers.

Property type and use. Primary residences get the best rates. Second homes carry a small premium. Investment properties typically add 0.5% to 0.75% on top of primary residence rates because of higher default risk.

Loan amount. Jumbo loans (above the conforming limit of $806,500 in most areas) historically carried higher rates, though in some markets they now track close to conforming rates. Very small loan amounts may also carry slightly higher rates because the lender’s fixed costs are spread over less revenue.

Where rates stand right now

As of late March 2026:

Product	Average rate	Source
30-year fixed	~6.38%	Freddie Mac PMMS
15-year fixed	~5.75%	Freddie Mac PMMS
5/1 ARM	~6.00%	Bankrate survey
30-year fixed (FHA)	~6.25%	Bankrate survey
30-year fixed (VA)	~5.85%	Bankrate survey

The Fed held rates steady at 3.50%–3.75% at their March 2026 meeting after three consecutive cuts in late 2025. Markets expect additional cuts later in 2026.

How to get the best mortgage rate

1. Improve your credit score before applying

Even a 20-point improvement can shift you into a better rate tier. The fastest moves:

• Pay down credit card balances below 30% utilization (below 10% is even better)
• Dispute errors on your credit report through AnnualCreditReport.com
• Don’t open new accounts in the months before applying
• Keep old accounts open (length of credit history matters)

2. Shop at least three lenders

This is the highest-ROI step most buyers skip. The CFPB found that borrowers who get quotes from multiple lenders can save thousands over the life of their loan. Rates vary by half a percentage point or more across lenders for the exact same borrower profile.

All mortgage credit inquiries within a 45-day window count as a single pull for scoring purposes. Shop aggressively.

AI-powered platforms like Chestnut compare rates from 100+ lenders in under two minutes, eliminating the need to fill out multiple applications.

3. Consider your loan type carefully

Don’t default to a 30-year conventional just because it’s familiar. If you’re a veteran, a VA loan almost always offers the lowest rate with zero down. If you’re buying in a rural area, USDA loans offer competitive rates with no down payment. FHA loans serve buyers with lower credit scores.

For a full comparison, see our guide on what to know before buying your first home.

4. Decide whether to buy points

Paying discount points upfront to lower your rate makes sense if your break-even period is shorter than how long you plan to stay. The math:

Break-even = Cost of points / Monthly savings

One point on a $400,000 loan costs $4,000 and saves about $67/month at a 0.25% rate reduction. Break-even: ~60 months. If you’re staying 10+ years, points pay for themselves several times over.

5. Lock your rate at the right time

Once you have a rate you’re comfortable with, lock it. Rate locks typically last 30 to 60 days. Longer locks (90 days) may cost slightly more.

Ask about float-down options, which let you benefit if rates drop between locking and closing. Not every lender offers this, but it’s worth asking in a declining-rate environment.

6. Time your closing strategically

Rates tend to be published in the morning and can shift throughout the day based on bond market movements. Your loan officer can help you lock at the right moment.

Closing at the end of the month reduces prepaid interest charges, since you only pay per-diem interest for the remaining days in the month. On a $400,000 loan at 6.5%, each day costs roughly $71.

Common rate myths

“The Fed controls mortgage rates.” Not directly. The Fed influences short-term rates. Mortgage rates follow long-term bond yields, which are driven by inflation expectations, economic outlook, and investor demand.

“Rates always drop when the Fed cuts.” Sometimes rates actually rise after a Fed cut if the market had already priced in the move or if the cut signals economic weakness that drives investors out of MBS.

“The rate is all that matters.” APR, closing costs, points, and lender fees all affect your total cost. A lower rate with high fees can cost more than a slightly higher rate with minimal fees.

“You should wait for rates to drop.” Timing the rate market is like timing the stock market. If you can afford the payment today and the home works for your life, waiting risks both higher prices and the possibility that rates don’t drop as expected. You can always refinance later if rates improve.

Frequently asked questions

What is a good mortgage rate in 2026?

As of March 2026, anything below 6.5% on a 30-year fixed is competitive for borrowers with strong credit. VA borrowers are seeing rates in the mid-5% range. “Good” depends on your credit score, loan type, and down payment. Compare your offer against Freddie Mac’s weekly average to benchmark.

How much does a 1% rate difference actually cost?

On a $400,000 30-year loan, the difference between 6.0% and 7.0% is about $267 per month and roughly $96,000 in total interest. Even a 0.5% difference translates to $133/month and $48,000 over the life of the loan.

Should I choose a fixed or adjustable rate?

Fixed rates give you certainty. ARMs start lower but carry the risk of future increases. An ARM may make sense if you plan to sell or refinance within the initial fixed period (typically 5 or 7 years). If you’re staying long-term, a fixed rate protects you from rate volatility.

How often do mortgage rates change?

Rates change daily, sometimes multiple times per day, based on bond market movements. Major economic reports (jobs data, inflation readings, Fed announcements) can cause significant single-day swings. That’s why locking your rate once you find a good one is important.

Can I negotiate my mortgage rate?

Yes. Lender fees (origination, underwriting) are negotiable, and having competing offers gives you leverage. Show your lender a better quote from a competitor and ask them to match or beat it. The CFPB encourages this: “Your best bargaining chip is usually having Loan Estimates from other lenders in hand.”

Your next step

See what rate you qualify for. Get a personalized quote from Chestnut in under two minutes. You’ll see rates from 100+ lenders for your specific profile, with no commitment and no impact on your credit score.

Sources

1. https://www.freddiemac.com/pmms
2. https://www.myfico.com/credit-education/blog/credit-score-mortgage-rates
3. https://www.consumerfinance.gov/owning-a-home/explore/contact-multiple-lenders/
4. https://www.treasury.gov/resource-center/data-chart-center/interest-rates/
5. https://themortgagereports.com/129236/fed-holds-rates-march-2026
6. https://www.bankrate.com/mortgages/current-mortgage-rates/
7. https://www.consumerfinance.gov/ask-cfpb/what-is-the-difference-between-a-mortgage-interest-rate-and-an-apr-en-135/