15-Year vs. 30-Year Mortgage in Texas: What Every Dallas Buyer Needs to Know in 2026

Which mortgage term is better for Dallas home buyers in 2026 — 15-year or 30-year?

For most Dallas-area buyers in 2026, the 30-year fixed mortgage is the more practical choice: lower monthly payments, more financial flexibility, and room to absorb Texas's high property tax load. But buyers with strong incomes who plan to stay long-term can save close to $300,000 in total interest by choosing a 15-year term. On a $475,000 DFW home with 20% down, the gap runs approximately $780 more per month for the 15-year — and in a market where Collin County property taxes add $850–$900 per month to housing costs, that difference is real. The right answer depends on your income, your DTI, how long you plan to stay, and what you'd do with the monthly savings if you didn't put them toward principal.

By Paul Blair | August 3, 2026

Your lender will quote you both options. Most won't linger on the comparison — they'll let you pick. But the 15-year versus 30-year decision is one of the most consequential financial choices you'll make when buying a home in Dallas, and it deserves more than a thirty-second conversation.

Here's the straight version: a 15-year mortgage is a disciplined wealth-building tool that costs more every month. A 30-year mortgage is a flexibility play that costs significantly more over time. The right choice depends on your income, your plans, and — critically in Texas — your full all-in housing cost.

The Math on a Typical DFW Home Purchase

Rates as of August 2, 2026, via NerdWallet:

• 30-year fixed: 6.65% APR
• 15-year fixed: 6.07% APR

On a $475,000 home in Frisco, Plano, or McKinney with 20% down — that's a $380,000 loan:

The monthly difference: roughly $780 more per month for the 15-year. Over 15 years, that's $140,400 in additional cash out of your pocket versus the 30-year schedule — but in exchange for nearly $300,000 in interest savings and a fully paid-off home in half the time.

The Consumer Financial Protection Bureau explains the rate difference well: shorter-term loans are lower risk for lenders, which is why the 15-year consistently carries a lower rate. That 0.58-point spread between 30-year and 15-year rates is narrower than it's been in some prior rate environments, but it's still material over a $380,000 loan.

The Texas Property Tax Layer

This is where DFW buyers need to think differently than buyers in lower-tax states.

In Collin County, the combined effective property tax rate runs approximately 2.14% in Plano (Plano ISD) to 2.18% in Frisco (Frisco ISD). Before your homestead exemption kicks in, a $475,000 home generates roughly $10,165–$10,355 per year in property taxes — about $850–$865 per month added to your housing cost.

Add homeowners insurance (averaging $4,200–$5,900 per year across DFW) and your all-in monthly payment looks like this:

That $780/month gap between the two terms represents a real constraint. A buyer who qualifies comfortably for the 30-year at the upper edge of approval won't qualify for the 15-year at all. Texas's property tax burden essentially makes the 30-year the default for anyone without meaningful income cushion.

The bright side: Texas has no state income tax, which frees up real cash compared to buyers in California or New York who carry both income taxes and high housing costs. But in DFW, a significant portion of that savings routes straight back into the property tax bill.

When the 15-Year Makes Sense in DFW

The 15-year is a strong fit in specific situations:

Move-up buyers with significant equity. If you're selling a home in Plano or Frisco and netting $200,000–$400,000 in proceeds, your new loan balance drops substantially. A smaller loan makes the higher 15-year payment far more manageable.

High-income households. A combined household income over $180,000–$200,000 in the DFW market gives enough DTI cushion to absorb both the 15-year payment and Texas's property tax load. If the PITI at $4,483 represents under 28% of your gross monthly income, the 15-year is worth a serious look.

Pre-retirement buyers. If you're 50 and buying a home you plan to own through retirement, eliminating the mortgage by 65 is a powerful position — especially in a state where property taxes will continue to rise annually. The 15-year functions as a forced savings plan.

Park Cities, Preston Hollow, and luxury segment buyers. Buyers at $1.5M–$3M+ often put 30–40% down, substantially lowering the absolute loan balance. The payment gap narrows considerably on a $1.2M loan with 40% down versus a $380,000 loan with 20%.

When the 30-Year Makes More Sense (Most Buyers)

Nearly 90% of US homebuyers choose a 30-year mortgage, according to Freddie Mac's Primary Mortgage Market Survey — and in DFW, the math backs that up for most buyers.

The payment headroom matters. Texas escrow adjustments mean your monthly payment already shifts annually as insurance rates rise and property values are reassessed. If you've been hit with an escrow shortage, you understand how quickly a fixed-rate mortgage can feel less fixed. Building in buffer with a lower base payment gives you room to absorb those hits.

You can always pay extra. Nothing stops you from taking a 30-year and making extra principal payments when cash flow allows. An extra $300/month on a $380,000 loan at 6.65% shortens the payoff by roughly seven years and saves approximately $140,000 in interest — without locking you into that higher payment every month.

DTI qualification. Many DFW buyers are stretching to afford homes at current prices. The 30-year keeps DTI ratios manageable and keeps more options open — including seller concessions for rate buydowns, which are common in the 2026 buyer's market.

Refinancing optionality. If you lock into a 30-year now and rates fall meaningfully in the next two or three years, you can refinance into a 15-year at that point — potentially at a lower rate — rather than committing today. Understanding when to lock your rate is worth thinking through before you close.

Weighing which mortgage term fits your income, your timeline, and your DTI in Frisco, Plano, or McKinney? Schedule a private consultation with a Grey Square agent. We'll run the full payment comparison for your specific target price range before you meet with a lender — so you walk in knowing exactly what you're deciding between.

Frequently Asked Questions

What are current 15-year and 30-year mortgage rates in Texas?

As of August 2, 2026, NerdWallet reports 30-year fixed mortgage rates in Texas at approximately 6.65% APR and 15-year fixed rates at approximately 6.07% APR. Rates vary by lender, credit score, and down payment size — the most accurate way to compare is to request formal loan estimates from at least two or three lenders using identical assumptions.

How much more does a 15-year mortgage cost per month in Dallas?

On a typical DFW purchase — $475,000 with 20% down, resulting in a $380,000 loan — the 15-year payment runs about $780 more per month than the 30-year at current rates. When you factor in Collin County property taxes of approximately $860 per month and DFW homeowners insurance, the total all-in housing cost difference between the two terms stays at that same $780/month figure.

Is a 15-year mortgage worth it if I plan to stay long-term in Frisco or Plano?

If your household income comfortably supports the higher payment — generally, that means total PITI stays under 28–36% of gross monthly income — and you're confident in staying 10 or more years, the 15-year earns its premium. On a $380,000 loan at current rates, you'll pay nearly $300,000 less in interest over the life of the loan. That math is compelling, but it only works if the payment doesn't strain your monthly budget or drain the emergency reserves you'll need for Texas property tax adjustments, insurance renewals, and hail season.

Can I switch from a 30-year to a 15-year mortgage later?

Yes — through refinancing. Many buyers start with a 30-year and refinance into a 15-year after building equity and watching rates, especially if rates drop. The key costs are qualifying again at refinance time and paying closing costs a second time, typically 2–3% of the loan amount. Keeping your credit score in strong shape gives you the most flexibility down the road.

Who should I work with when deciding on a mortgage term for a home purchase in Frisco or Plano, Texas?

Work with a lender who will show you both options on a formal loan estimate — same purchase price, same down payment, same assumptions — so you can compare total cost of ownership over your expected hold period. Your buyer's agent matters here too. A good agent helps you understand how the mortgage term affects your offer strategy, how quickly you can qualify, and how your monthly payment interacts with Texas's escrow adjustment cycle. Paul Blair has helped buyers at every income level in Frisco, Plano, McKinney, and throughout Collin County work through this decision before ever setting foot in a home. If you'd like an honest read on where you sit before engaging a lender, that conversation is a good place to start.

Schedule a private consultation with Paul Blair at Grey Square. Whether you're targeting Frisco, Plano, McKinney, or another DFW suburb, we'll walk through the mortgage term math for your specific price range — including how each payment looks in the context of Collin County property taxes and your full monthly budget.

The 15-year and 30-year mortgage are both sound options. The one that's right for you comes down to cash flow, plans, and what you'd do with the monthly difference if you didn't put it toward the house. Getting that answer right before you go under contract is worth more than any online calculator.

About Paul Blair

After working with buyers at every income level across Frisco, Plano, and McKinney — from first-time buyers trying to make DTI math work to move-up sellers deciding whether to recycle equity into a shorter loan term — Paul's starting point on the 15-versus-30 question is always the same: run the full monthly picture first, not just the rate.

Paul Blair is the founder and broker of Grey Square, a virtual real estate brokerage representing buyers and sellers across Dallas and Los Angeles. With 22 years in the business and more than $200 million in closed transactions, Paul works the full range of the market, from luxury homes in the Park Cities and Preston Hollow to estates in the Hollywood Hills and across the Westside. Connect with Paul and the Grey Square team at greysq.com. TX TREC #9011505 · CA DRE #01792671.