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What Determines Your Mortgage Interest Rate?

 

When shopping for a home loan, one of the first questions people ask is, "What's today's interest rate?".

 

While that's an important question, the reality is that there isn't one universal mortgage rate. Your interest rate is based on several factors unique to your financial profile and the type of loan you're requesting.  Understanding these factors can help you prepare before applying and may even save you thousands of dollars over the life of your mortgage.

 

1. Credit Score

Your credit score is one of the biggest factors lenders consider when determining your interest rate.

Generally speaking:

  • 780+ – Typically qualifies for the best available pricing.

  • 720–779 – Still receives very competitive rates.

  • 680–719 – May see slightly higher rates.

  • Below 680 – Interest rates often increase as lenders view these loans as carrying greater risk.

 

A higher credit score demonstrates a history of responsible borrowing and timely payments, giving lenders more confidence in extending credit.

 

2. Loan Type

Not all mortgage programs are priced the same.  Some of the most common loan types include:

  • Conventional Loans – Often offer the best pricing for borrowers with strong credit and larger down payments.

  • FHA Loans – Designed for borrowers with lower down payments or less-than-perfect credit, but include mortgage insurance requirements.

  • VA Loans – Available to eligible veterans and active-duty military members and frequently offer very competitive interest rates.

  • Non-QM - Designed for out-of-box scenarios for those who cannot provide traditional incomer documentation.  Programs include Bank Statement loans, DSCR and Asset Depletion.  

 

Each loan program has different guidelines, insurance requirements, and pricing structures that affect the final interest rate.

 

3. Loan Amount

The amount you're borrowing can also impact your rate.  Loan pricing may differ for:

  • Smaller loan amounts

  • Standard conforming loan amounts

  • High-balance conforming loans

  • Jumbo loans

 

In some situations, a slightly larger or smaller loan amount can actually qualify for better pricing depending on current market conditions and investor demand.

 

4. Property Type

The type of property you're financing also influences your interest rate.  Examples include:

  • Single-family residence

  • Condominium

  • Townhome

  • Multi-unit property (2–4 units)

  • Manufactured home

 

Properties considered higher risk by lenders—such as certain condos or multi-unit properties—may carry slightly higher interest rates.

 

5. Occupancy Type

How you plan to use the property matters.

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Primary Residence - Your primary home generally qualifies for the lowest interest rates because borrowers are statistically less likely to default on the home they live in.

 

Second Home - Vacation homes often have slightly higher rates than primary residences.

 

Investment Property - Rental and investment properties typically receive the highest interest rates because they present greater lending risk.

 

6. Down Payment & Loan-to-Value (LTV)

The amount you put down affects your Loan-to-Value ratio (LTV).  Generally:

  • Larger down payments often result in better pricing.

  • Smaller down payments may increase lender risk.

  • Loans with less than 20% down may require mortgage insurance depending on the loan program.

 

7. Debt-to-Income Ratio (DTI)

Your Debt-to-Income ratio compares your monthly debt obligations to your gross monthly income.  While DTI doesn't always directly change your interest rate, borrowers with stronger financial profiles often have access to more loan options and better pricing.

 

8. Lock Period

Mortgage rates change daily—and sometimes multiple times in a single day.  When you're under contract, you'll choose how long to lock your interest rate.  Common lock periods include:

  • 15 days

  • 30 days

  • 45 days

  • 60 days

 

Longer lock periods generally come with slightly higher pricing because the lender is guaranteeing that rate for a longer period.

 

9. Discount Points or Lender Credits

Borrowers also have the option to adjust their interest rate by choosing:

  • Discount Points: Pay upfront fees to secure a lower interest rate.

  • Lender Credits: Accept a slightly higher interest rate in exchange for help covering some closing costs.

 

The right choice depends on your financial goals and how long you plan to keep the loan.

 

10. Current Market Conditions

Even if two borrowers have identical qualifications, interest rates can change from one day to the next.  Mortgage rates are influenced by:

  • Inflation

  • Bond market activity

  • Federal Reserve policy

  • Economic reports

  • Employment data

  • Investor demand for mortgage-backed securities

 

Because of this, today's rate may not be available tomorrow.

 

The Bottom Line

There is no one-size-fits-all mortgage rate.  Your final interest rate is determined by a combination of your credit profile, loan program, property details, occupancy, loan amount, market conditions, and several other factors.

 

That's why online advertised rates don't always reflect the rate you'll actually receive.  If you're thinking about purchasing a home or refinancing, getting a personalized quote based on your unique situation is the best way to understand your available options.

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