The question almost every New Braunfels buyer asks before they ask anything else is some version of "how much house can I actually afford?" It's the right question, and it deserves a clear answer before you tour a single home. Affordability isn't just your maximum loan approval — it's the number that still leaves room for property taxes, insurance, maintenance, and the rest of your life. Here's how lenders actually calculate it, what the 2026 rate environment does to your budget, and what your number realistically buys in this market.
THE QUICK ANSWER
A Simple Affordability Rule of Thumb
Most lenders still use some version of the 28/36 rule as a starting point: your housing payment — principal, interest, taxes, and insurance — should stay under about 28 percent of your gross monthly income, and your total debt payments, housing included, should stay under about 36 percent. It's a rule of thumb, not a hard cap, and actual approval depends on your full financial picture, but it's a fast way to sanity-check a price range before you get deep into the process.
- Housing payment (principal, interest, taxes, insurance) under ~28% of gross monthly income
- Total monthly debt, including housing, under ~36% of gross monthly income
- These are starting points — your credit, down payment, and loan type shift the exact numbers
THE LENDER'S MATH
How Lenders Actually Calculate What You Can Borrow
Loan approval comes down to a formal version of the rule of thumb above, applied against your documented income, debts, credit, and down payment — not a guess or a round number pulled from a home search app.
Debt-to-Income Ratio, Explained
Your debt-to-income ratio, or DTI, is every recurring monthly debt payment — car loans, student loans, minimum credit card payments, and your future mortgage payment — divided by your gross monthly income. Most conventional loans want your back-end DTI at or below 43 to 45 percent, though some programs allow more with compensating factors like a strong credit score or larger down payment. A buyer with significant existing debt will qualify for meaningfully less home than a buyer with the same income and no debt.
Why Your Credit Score Changes the Math
Credit score doesn't just affect whether you're approved — it directly affects the interest rate you're offered, which changes your maximum purchase price at a given monthly payment. A buyer with a 780 credit score and a buyer with a 660 credit score can have the same income and qualify for meaningfully different loan amounts, purely because of the rate difference. If your score has room to improve, even a few months of focused work before applying can translate into real purchasing power.
THE RATE ENVIRONMENT
The 2026 Rate Environment and What It Does to Your Budget
Mortgage rates move, and any specific number printed today will be outdated by the time you're reading this. What matters is understanding the relationship between rate and purchasing power, so you can react to whatever the current number actually is when you talk to a lender.
Every Half-Point Matters More Than You'd Think
A half-percentage-point change in your interest rate shifts your monthly payment on a typical New Braunfels home price by roughly $100 to $150 — which, run in reverse, means your maximum purchase price at a fixed monthly budget can move by $20,000 to $30,000 for every half point of rate movement. This is why getting an accurate, current rate from a lender matters more than reading a national rate headline from a few months ago.
Fixed vs. Adjustable in Today's Market
Most New Braunfels buyers use a 30-year fixed loan for the predictability, but adjustable-rate options can make sense for buyers who know they'll move or refinance within five to seven years, since the initial rate is often lower. This is a conversation for a lender who can model both scenarios against your specific plans, not a decision to make from a blog post.
THE DOWN PAYMENT
Down Payment Scenarios: 5%, 10%, and 20%
Your down payment size affects both your monthly payment and whether you're paying private mortgage insurance, or PMI, on top of it.
Below 20% Down Means PMI
Putting down less than 20 percent on a conventional loan typically means paying PMI, an added monthly cost that protects the lender, not you, until you build enough equity to remove it. It's not a reason to avoid a low-down-payment purchase — it's a real cost that belongs in your monthly math from the start.
Down Payment Assistance Is Real in Texas
First-time buyers in Texas have access to real down payment assistance programs that can meaningfully change what's possible with less cash up front. The specific programs — including TSAHC and TDHCA — are covered in detail in the First-Time Homebuyer Guide, and they're worth exploring before assuming 20 percent down is required.
IN THIS MARKET
What Your Budget Actually Buys in New Braunfels Right Now
Affordability math is only useful once it connects to real listings. For a concrete, current sense of what specific price points actually get you — square footage, neighborhoods, lot size, age of construction — see What $400K, $500K, and $600K Buys in New Braunfels. Running your calculated budget against that guide is the fastest way to know whether your number and your expectations are aligned before you start touring homes.
BEYOND THE MORTGAGE
The Costs Beyond the Mortgage Payment
A common affordability mistake is calculating principal and interest only, then getting surprised by everything else layered on top.
Property Taxes Are a Bigger Line Item in Texas
Texas trades no state income tax for property taxes that run above the national average, and that number needs to be in your monthly budget from the start, not treated as a rounding error. The full breakdown of how this works in Comal County, including homestead exemptions, is in the New Braunfels Property Tax Guide.
Insurance, HOA Dues, and Closing Costs
Homeowner's insurance in this region has risen with hail and wind exposure, master-planned communities carry HOA dues that vary widely by neighborhood, and closing costs typically run several thousand dollars on top of your down payment. The full breakdown of what buyers actually pay at closing is covered in Closing Costs in Texas.
THE FIRST REAL STEP
Get Pre-Approved Before You Fall in Love With a Listing
Everything above is planning math. The number that actually matters is the one a lender gives you in writing after reviewing your real income, debt, and credit — not an estimate from a mortgage calculator. Getting pre-approved before you do anything else turns this from theoretical math into a real, usable budget, and it's the step that lets you move confidently once the right home in New Braunfels shows up.
Common questions
Frequently asked questions.
How much income do I need to buy a $400,000 home in Texas?
Using the 28/36 rule as a general guide, a buyer would typically need gross household income in the range of $95,000 to $110,000 to comfortably afford a $400,000 home in New Braunfels, depending on the interest rate, down payment, property tax rate, insurance cost, and existing debt. This is a planning estimate, not a loan approval — a lender will calculate your exact number based on your full financial picture.
What is a good debt-to-income ratio for a mortgage?
Most lenders prefer a back-end debt-to-income ratio — total monthly debt payments including the new mortgage, divided by gross monthly income — at or below 43 to 45 percent, with some programs allowing higher ratios for well-qualified borrowers. A lower DTI generally means more loan options and better terms, since it signals more room in your budget to absorb the payment.
Do I need 20% down to buy a home in New Braunfels?
No. Conventional loans commonly allow down payments as low as 3 to 5 percent, and FHA loans allow as little as 3.5 percent, though anything below 20 percent typically requires private mortgage insurance. Texas also has real down payment assistance programs for first-time buyers that can reduce the cash needed up front.
How do Texas property taxes affect how much house I can afford?
Texas property taxes run above the national average, and since they're included in most lenders' housing-payment calculations, a higher tax rate directly reduces the loan amount you'll qualify for at a given income. Comal County's specific rates and how homestead exemptions reduce the taxable value are covered in the New Braunfels Property Tax Guide.
What's the difference between pre-qualification and pre-approval?
Pre-qualification is a quick, informal estimate based on information you self-report, with no verification. Pre-approval involves a lender actually verifying your income, assets, credit, and debt, and results in a conditional commitment in writing. Pre-approval carries real weight with sellers and gives you an accurate number; pre-qualification is a rough starting estimate at best.
Should I get pre-approved before I start house hunting?
Yes. Pre-approval establishes your real, lender-verified budget before you start touring homes, which prevents wasted time looking above your range and strengthens any offer you eventually make, since sellers take pre-approved buyers more seriously than buyers with no financing in place.
Ask Todd
Have a specific question?
The honest answer is usually faster than a long article. Send a note and I will reply within a business day.