Mortgage Rates Explained: Fixed vs ARM (2026)

The Federal Reserve held its benchmark rate steady through early 2026, keeping 30-year fixed mortgage rates near 6.8% — more than double the 3.0% lows seen in 2021. On a $350,000 loan, that difference adds over $800 per month to your payment. Yet borrowers who understand how rates are set, when to lock, and whether to choose fixed vs. ARM can still save tens of thousands over the life of their mortgage.

"Most borrowers fixate on the headline rate, but the real savings come from understanding discount points, rate locks, and the break-even timeline. I've seen clients save $15,000–$30,000 over their loan term simply by buying one discount point and timing their rate lock correctly." — Sarah Mitchell, Chartered Financial Planner

How Are Mortgage Rates Set?

Mortgage rates are influenced by a variety of economic factors, primarily the Federal Reserve's monetary policy, the yield on the 10-year Treasury note, and the performance of mortgage-backed securities (MBS).

Federal Funds Rate

The Federal Reserve (often referred to as the Fed) sets the federal funds rate, which is the interest rate at which banks lend to each other overnight. This rate directly influences short-term interest rates, including those for adjustable-rate mortgages (ARMs). When the Fed raises or lowers the federal funds rate, it can lead to corresponding changes in mortgage rates.

• Impact of Rate Changes:
  • A 0.25% increase in the federal funds rate can lead to a similar increase in mortgage rates.
  • Conversely, a decrease can lower mortgage rates, making borrowing cheaper.

10-Year Treasury Yield

The yield on the 10-year Treasury note is another critical indicator of mortgage rates. Mortgage lenders often use this yield as a benchmark for setting fixed mortgage rates.

• Relationship with Mortgage Rates:
  • When the yield rises, mortgage rates typically rise as well.
  • A decrease in the yield often leads to lower mortgage rates.

Mortgage-Backed Securities (MBS)

Mortgage-backed securities are investment products made up of a bundle of home loans. The performance of these securities can significantly influence mortgage rates.

• Market Demand:
  • High demand for MBS can drive rates down, as lenders can sell these securities at a profit.
  • Conversely, if demand decreases, rates may rise.

Understanding these key components will help you grasp how mortgage rates are determined and how they can fluctuate over time.

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Fixed vs. Adjustable-Rate Mortgages (ARM)

When choosing a mortgage, one of the most significant decisions is whether to go with a fixed-rate mortgage or an adjustable-rate mortgage (ARM). Each option has its pros and cons, and understanding these can help you make the best choice for your financial situation.

Fixed-Rate Mortgages

A fixed-rate mortgage offers a consistent interest rate throughout the life of the loan, typically 15 or 30 years. This predictability can be beneficial for budgeting and long-term financial planning.

• Advantages:

  • Stability: Your monthly payments remain the same, regardless of market fluctuations.
  • Long-term planning: Easier to budget for future expenses.

• Disadvantages:

  • Higher initial rates compared to ARMs.
  • Less flexibility if market rates drop.

Adjustable-Rate Mortgages (ARMs)

ARMs typically start with a lower interest rate than fixed-rate mortgages, which can make them appealing for buyers looking to save on initial costs. However, these rates can fluctuate based on market conditions.

• Advantages:

  • Lower initial rates: Can lead to significant savings in the early years of the mortgage.
  • Potential for lower overall costs if rates remain low.

• Disadvantages:

  • Uncertainty: Monthly payments can increase significantly if rates rise.
  • Complexity: Understanding the terms and conditions can be challenging.

Fixed vs. ARM Comparison Table

Feature	Fixed-Rate Mortgage	Adjustable-Rate Mortgage (ARM)
Interest Rate	Fixed for the life of the loan	Variable, adjusts after initial period
Initial Rate	Generally higher	Typically lower
Payment Stability	Yes	No (can fluctuate)
Long-Term Planning	Easier	More complex
Best for	Long-term homeowners	Short-term homeowners or those expecting to refinance

When deciding between a fixed-rate mortgage and an ARM, consider your financial situation, how long you plan to stay in the home, and your risk tolerance regarding interest rate fluctuations.

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When Does an ARM Make Sense?

While ARMs can be risky, they may be the right choice for certain borrowers under specific circumstances. Here are some scenarios where an ARM might be advantageous:

Short-Term Homeownership

If you plan to live in your home for a short period (typically less than five years), an ARM can offer significant savings during the initial fixed-rate period.

• Example: If you secure a 5/1 ARM, you’ll have a fixed rate for the first five years, after which the rate adjusts annually. If you sell the home before the adjustment, you benefit from lower payments without the risk of increased rates.

Anticipated Rate Decrease

If you believe that interest rates will decrease or remain stable for the foreseeable future, an ARM can be a smart choice.

• Market Trends: If economic indicators suggest that rates will fall, locking in a lower initial ARM rate can save you money.

Lower Initial Payments

For first-time homebuyers or those on a tight budget, the lower initial payments of an ARM can make homeownership more accessible.

• Cash Flow Management: The savings can be redirected towards other expenses, such as home improvements or paying off debt.

However, it’s essential to evaluate your financial situation and market conditions carefully before choosing an ARM.

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Understanding Mortgage Points

When securing a mortgage, you may encounter the term "points." Mortgage points are fees paid directly to the lender at closing in exchange for a reduced interest rate. Understanding how mortgage points work can help you make informed decisions about your loan.

What Are Mortgage Points?

One point is equal to 1% of the loan amount. For example, if you take out a $300,000 mortgage, one point would cost you $3,000.

• Types of Points:
  • Discount Points: Paid to lower your interest rate. For example, paying one discount point might reduce your rate by 0.25%.
  • Origination Points: Fees charged by the lender for processing the loan, not necessarily tied to the interest rate.

Buying Points: The Math

Buying points can be a strategic move, especially if you plan to stay in your home for a long time. Here’s how to evaluate whether buying points makes sense for you:

1. Calculate the Cost of Points: Determine how much you’ll pay for points. For example, if you buy two points on a $300,000 mortgage, that would cost you $6,000.

2. Estimate Monthly Savings: Calculate how much your monthly payment will decrease by purchasing points. If buying two points reduces your interest rate from 4.5% to 4%, your monthly payment might drop from approximately $1,520 to $1,432, saving you $88 per month.

3. Break-Even Point: Divide the cost of the points by your monthly savings to find out how long it will take to recoup the cost. In this example, $6,000 / $88 = 68 months (or about 5.7 years).

4. Long-Term Consideration: If you plan to stay in your home beyond the break-even point, buying points can be a wise financial decision.

When to Consider Buying Points

• Long-Term Homeowners: If you plan to stay in your home for a long time, buying points can save you money over the life of the loan.
• Low-Interest Rates: When rates are low, buying points can lock in a lower rate for the duration of your mortgage.

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Rate Lock Timing Strategy

Locking in your mortgage rate can protect you from rising interest rates while you finalize your home purchase. However, knowing when and how to lock in your rate is crucial for maximizing savings.

What Is a Rate Lock?

A rate lock is an agreement between you and your lender that secures a specific interest rate for a set period, typically ranging from 30 to 60 days.

• Benefits:
  • Protection against rising rates during the home-buying process.
  • Peace of mind knowing your rate is secured.

When to Lock Your Rate

1. When You Have a Signed Purchase Agreement: It’s best to lock your rate once you have a signed purchase agreement on a home. This ensures you have a clear timeline for closing.

2. Market Conditions: Monitor economic indicators and market trends. If rates are rising, locking in sooner rather than later can save you money.

3. Your Financial Situation: If your financial situation is stable and you’re confident in your ability to close on the loan, locking in your rate can be a smart move.

How Long to Lock

• Short-Term Locks (30 Days): Ideal for those who are close to closing.
• Long-Term Locks (60-90 Days): Useful if you anticipate delays or if you’re in a volatile market.

Potential Drawbacks of Rate Locks

• Fees: Some lenders may charge a fee for locking in a rate, especially for longer lock periods.
• Expiration: If you don’t close within the lock period, you may lose your rate and have to lock in at a higher rate.

Understanding when and how to lock in your mortgage rate can significantly impact your overall loan cost.

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Key Takeaways

• The 10-year Treasury yield is the best predictor of where 30-year fixed mortgage rates are heading — watch it closely before locking.
• Fixed-rate mortgages suit most buyers, especially those planning to stay in their home for 7+ years or who want predictable monthly payments.
• ARMs can save money short-term — a 5/1 ARM typically starts 0.5–1.0% below the 30-year fixed rate, but payments can jump significantly after the initial period.
• One discount point (1% of loan amount) typically reduces your rate by 0.25% — calculate the break-even period before buying points.
• Lock your rate once you have a signed purchase agreement — a 30-day lock is free from most lenders, while 60-day locks may carry a small fee.
• Comparing at least three lenders can save you 0.25–0.50% on your rate, which translates to $15,000–$30,000 on a $350,000 loan over 30 years.

Conclusion

Your next steps:

1. Check today's rates — the Federal Reserve's decisions on the federal funds rate and movement in the 10-year Treasury yield directly impact what you'll pay.
2. Decide fixed vs. ARM based on how long you plan to own the home — if it is fewer than 5 years, run the numbers on a 5/1 ARM; if it is longer, a fixed rate provides certainty.
3. Calculate your discount point break-even — divide the upfront cost by your monthly savings to see if buying points makes sense for your timeline.
4. Get pre-approved by at least three lenders — rate differences of 0.25–0.50% between lenders are common and add up to thousands over the loan's life.
5. Compare current mortgage rates by state on our mortgage comparison page to find the most competitive lenders in your area.