Mortgage

What Factors Affect My Mortgage Interest Rate?

Patrick Kevin Fagan

Texas Real Estate Sales Agent #454749, AXEN Realty LLC · Senior Loan Officer, NMLS ID #877741, NEXA Mortgage, LLC

Updated October 9, 2026

Quick Answer

Your rate is set by five things working together: your credit score, down payment and loan-to-value, the loan type you choose, the property type, and the bond market on any given day. A 740-plus score with 20% down on a conventional loan typically prices best. You control most of those factors, so I build your file to earn the rate, not beg for it. Ask Patrick how what drives mortgage rates would affect your payment.

Here is the money problem, Patriot Nation: you are about to get a rate quote and you have no idea which levers actually move it. Five things set your rate: your credit score, your down payment, the loan type, the property type, and the bond market on any given day. You control most of them, so the smart play is to build your file to earn the rate instead of hoping for it.

How your credit score moves the rate

Credit score is one of the biggest factors. A score of 760 and above gets the best rates, 700 to 759 gets slightly higher, and 620 to 699 gets significantly higher. A 50-point difference can mean 0.25% to 0.5% on the rate, which is thousands of dollars over the life of the loan. Improving your score before you apply is the highest-paid work in homebuying.

The meaning in plain English: the score is the first thing the pricing engine reads, and it sets the starting line.

The money side: a 50-point jump can save tens of thousands of dollars over a 30-year loan.

The real-world consequence: check your score months before you shop, and fix what you can before the quote.

How your down payment moves the rate

Larger down payments mean lower risk for the lender. Twenty percent down eliminates mortgage insurance and typically earns the best rates, while 3% to 5% down on FHA or conventional means higher rates and mortgage insurance. Ten percent is the middle ground. The loan-to-value ratio is the term to know: the less you borrow relative to the home's value, the better the pricing.

The meaning: the lender prices the risk of the loan, and the down payment is a big piece of that risk.

The money side: 20% down removes the mortgage insurance line entirely, which is often worth more than the rate.

The real-world consequence: weigh the down payment against your reserves, because cash after closing matters too.

How the loan type moves the rate

FHA loans typically carry lower rates but require mortgage insurance for the life of the loan. VA loans often carry the best rates with zero down and no mortgage insurance. Conventional loans are competitive for qualified buyers, and USDA loans are competitive for eligible rural buyers. Each type prices differently based on the risk the program takes on, so the right loan type is part of the rate strategy.

The meaning: the program sets a pricing range, and your file picks the spot inside it.

The money side: the lowest rate is not always the lowest payment once mortgage insurance is added.

The real-world consequence: compare the full payment, not just the rate, across the loan types you qualify for.

How the property type moves the rate

The property itself changes the pricing. Condos, investment properties, and second homes carry higher rates than a primary residence because the lender sees more risk. An owner-occupied single-family home in good condition earns the best pricing, while a condo in a complex with issues or a rental property moves the rate up. Know the property type before you compare quotes.

The meaning: the house is part of the loan's risk profile, right next to your credit and cash.

The money side: a second home or rental can cost a quarter point or more versus a primary residence.

The real-world consequence: tell the lender the real use of the property up front, because the pricing depends on it.

How the market moves the rate

The bond market sets the baseline every day. Economic data, policy moves, and investor demand for mortgage-backed securities push rates up and down, which is why the same borrower can see a different quote on different days. You cannot control the market, but you can control when you lock, and a rate lock holds your rate and payment for a set period, usually 30 to 60 days.

The meaning: the market is the weather, and the lock is the umbrella.

The money side: locking protects you from increases while your contract moves toward closing.

The real-world consequence: work the controllable levers, then lock when the number works for you.

What you actually control

You control your credit score, your down payment, the loan type you choose, and the timing of your lock. You do not control the bond market. The buyers who get the best rates work the controllable levers first, then shop lenders on the same day and compare the APR. That is the whole game, and it is why I build the file to earn the rate, not beg for it.

The meaning: the rate is earned in the file, not negotiated at the desk.

The money side: the controllable levers are worth more than any single lender's special.

The real-world consequence: fix the credit, size the down payment, pick the loan type, and shop the APR, and make it a great one.

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Patrick's Take

I tell clients that your rate is a combination of what you bring (credit, down payment) and what the market gives you. You can control your credit score and down payment. You cannot control the market. Focus on the things you can improve. Even a 0.25% rate reduction saves thousands over the life of the loan.
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Patrick Kevin Fagan

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Answered by Patrick Kevin Fagan

Texas Real Estate Sales Agent #454749, AXEN Realty LLC · Senior Loan Officer, NMLS ID #877741, NEXA Mortgage, LLC

Call or text: 210-317-6514