How Mortgage Rates Are Calculated
Understand the factors that determine your mortgage interest rate
Key Factors That Determine Mortgage Rates
Market Interest Rates
Tied to the 10-year Treasury note yield and Federal Reserve monetary policy.
Credit Score
Higher scores (740+) qualify for the best rates; lower scores mean higher rates.
Loan-to-Value Ratio
Lower LTV (20%+ down) means lower rates; higher LTV may require PMI.
Loan Term
15-year loans have lower rates than 30-year loans.
The Mortgage Rate Formula
Your Rate = Base Rate + Risk Premium + Loan-Specific Adjustments
Credit Score Impact on Rates
| Credit Score Range | Rate Adjustment | Typical Rate (2026) |
|---|---|---|
| 740 - 850 | 0.00% | 6.25% |
| 700 - 739 | +0.25% | 6.50% |
| 660 - 699 | +0.50% | 6.75% |
| 620 - 659 | +0.75% | 7.00% |
| < 620 | +1.00%+ | 7.25%+ |
Market Factors That Influence Rates
Factors That Increase Rates
- • Rising inflation
- • Federal Reserve rate hikes
- • Strong economic growth
- • Higher 10-year Treasury yields
- • Geopolitical instability
Factors That Decrease Rates
- • Falling inflation
- • Federal Reserve rate cuts
- • Economic slowdown/recession
- • Lower 10-year Treasury yields
- • Stable global markets
How to Get the Best Mortgage Rate
Improve Credit Score
Pay bills on time, reduce debt
Save for Larger Down Payment
20% down avoids PMI
Shop Multiple Lenders
Compare 3-5 offers
Consider Points
Buy down your rate
Reduce Debt-to-Income
Keep DTI below 43%
Lock Your Rate
Protect against increases
Frequently Asked Questions
What determines my mortgage interest rate?
Your mortgage rate is determined by a combination of market factors (like the Federal Reserve rate, bond yields) and personal factors (credit score, down payment, loan-to-value ratio, debt-to-income ratio). Lenders also consider the loan type and term.
Why do mortgage rates change daily?
Mortgage rates are tied to the 10-year Treasury note yield, which fluctuates based on economic news, inflation data, Federal Reserve policy, and global events. These factors change daily, causing mortgage rates to adjust accordingly.
How does my credit score affect my rate?
Credit scores significantly impact mortgage rates. Borrowers with higher credit scores (740+) qualify for the lowest rates, while those with lower scores (below 620) may face higher rates or difficulty qualifying for conventional loans.
What is the difference between APR and interest rate?
The interest rate is the cost of borrowing the principal loan amount. The APR (Annual Percentage Rate) includes the interest rate plus other costs like points, fees, and closing costs, giving you a more accurate picture of the total loan cost.
Can I negotiate my mortgage rate?
Yes, you can negotiate mortgage rates. Shopping around with multiple lenders, improving your credit score, making a larger down payment, and paying discount points can help you secure a lower rate.
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Disclaimer: This guide is for educational purposes only and does not constitute financial advice. Please consult with a qualified mortgage professional for personalized guidance.