Understanding
Mortgage Rates
Mortgage rates affect your monthly payment more than almost any other factor. Learn how rates are set, what influences them, and how to time your rate lock for maximum savings.
Last updated: March 2026
How Mortgage Rates
Are Determined
Mortgage rates are not set by any single entity. They are the result of a complex interplay between global economic forces, government policy, bond markets, and your individual financial profile.
The 10-Year Treasury Yield
The single most important benchmark for mortgage rates. Most 30-year fixed mortgages track the yield on the 10-year U.S. Treasury note. When investors buy more Treasuries (driving yields down), mortgage rates tend to fall. When they sell (driving yields up), mortgage rates tend to rise. The spread between the 10-year yield and mortgage rates typically ranges from 1.5 to 2.5 percentage points.
The Federal Reserve
The Fed does not directly set mortgage rates — it sets the federal funds rate, which is the rate banks charge each other for overnight lending. However, Fed policy profoundly influences mortgage rates. When the Fed raises rates to combat inflation, borrowing costs across the economy rise, putting upward pressure on mortgage rates. When the Fed cuts rates to stimulate growth, mortgage rates tend to decline.
Inflation Expectations
Inflation is the enemy of bond investors and, by extension, mortgage rate stability. When inflation expectations rise, investors demand higher yields to compensate for the eroding purchasing power of future payments. This directly pushes mortgage rates higher. The Consumer Price Index (CPI) and Personal Consumption Expenditures (PCE) reports are closely watched indicators.
Mortgage-Backed Securities Market
Mortgages are packaged into mortgage-backed securities (MBS) and sold to investors. The demand for these securities directly affects the rates lenders offer. When MBS demand is high, lenders can offer lower rates. When demand weakens, rates rise. Global events, investor sentiment, and liquidity conditions all influence MBS pricing.
What Determines
Your Personal Rate
Beyond market conditions, several personal factors influence the specific rate you are offered. Understanding these factors helps you position yourself for the best possible rate.
Credit Score
Your credit score is the single biggest personal factor affecting your rate. Borrowers with scores of 760+ receive the best rates. Every 20-40 point drop can add 0.125% to 0.50% to your rate. On a $500,000 loan, the difference between a 760 and 680 credit score can cost $50,000+ in additional interest over the life of the loan.
Down Payment / LTV
The more you put down, the lower your loan-to-value (LTV) ratio, and the better your rate. Borrowers putting 20% or more down typically receive the best rates and avoid PMI. Putting less than 20% down increases your rate slightly and adds the cost of mortgage insurance.
Loan Type and Term
15-year fixed rates are typically 0.5-0.75% lower than 30-year rates. Adjustable-rate mortgages (ARMs) often start even lower. FHA and VA loans may have different rate structures than conventional. The loan amount also matters — jumbo loans (above $766,550 in most areas) may carry slightly higher rates.
Property Type and Use
Primary residences receive the best rates. Second homes typically add 0.25-0.50% to the rate. Investment properties add 0.50-0.75%. Condos may carry a slight premium over single-family homes. Multi-family properties (2-4 units) may have higher rates than single-family.
Debt-to-Income Ratio
Your DTI — the percentage of your gross monthly income that goes toward debt payments — affects both your qualification and your rate. Lower DTI ratios signal lower risk and may qualify you for better pricing. Most programs cap DTI at 43-50%, with better rates available at lower ratios.
Points and Credits
You can buy your rate down by paying discount points (each point = 1% of loan amount = ~0.25% rate reduction) or accept a higher rate in exchange for lender credits that offset closing costs. This is a strategic decision based on your timeline and financial priorities.
When and How to
Lock Your Rate
A rate lock freezes your interest rate for a specified period, protecting you from rate increases while your loan is being processed. Understanding rate locks is essential for getting the best deal.
What Is a Rate Lock?
A rate lock is a commitment from your lender to hold a specific interest rate and points for a defined period — typically 15, 30, 45, or 60 days. Once locked, your rate will not increase even if market rates rise. This protects you during the weeks between application and closing. However, if rates drop after you lock, you are generally stuck at the locked rate unless your lender offers a float-down option.
When Should You Lock?
The ideal time to lock depends on market conditions and your risk tolerance. In a rising rate environment, locking early protects you from increases. In a falling rate environment, you might float (delay locking) to capture lower rates. At Theós Financial, Peter and the team monitor rate movements daily and advise you on the optimal timing based on current market dynamics.
Lock Period Length
Shorter lock periods (15-30 days) typically offer slightly better rates because the lender bears less risk. Longer locks (45-60 days) cost slightly more but give you more time to close. With our average close time of 14 days, most Theós clients can take advantage of shorter, cheaper lock periods.
Float-Down Options
Some lenders offer a "float-down" feature that allows you to capture a lower rate if rates drop significantly after you lock. This option typically costs a small premium (0.125-0.25%) but can be valuable in volatile markets. We can advise whether a float-down makes sense for your situation.
Rates in
Perspective
To understand where rates are today, it helps to look at history. In the early 1980s, 30-year fixed rates peaked above 18%. Through the 1990s and 2000s, rates gradually declined, settling in the 5-7% range. The 2008 financial crisis and subsequent Federal Reserve intervention pushed rates to historic lows, reaching an all-time bottom of around 2.65% in early 2021.
The sharp rate increases of 2022-2023, driven by the Fed's fight against post-pandemic inflation, brought rates back to the 6-7% range. While this feels high compared to the anomalous sub-3% rates of 2020-2021, it is important to remember that today's rates are still below the historical average of approximately 7.7% over the past 50 years.
The key takeaway: do not wait for rates to return to 3%. That was a once-in-a-lifetime anomaly driven by an unprecedented pandemic response. Instead, focus on getting the best rate available today, knowing you can always refinance if rates drop significantly in the future. As the saying goes: "Date the rate, marry the house."
See Today's Rates
Personalized for You
National averages are just that — averages. Your rate depends on your unique financial profile. Get a personalized rate quote from Theós Financial in minutes — free, with no credit check and no obligation.