Your credit score tells a lender how you have handled debt in the past. Your debt-to-income ratio, usually shortened to DTI, tells the lender whether a new mortgage payment fits alongside the debts you already have. It is one of the main numbers underwriters look at, so understanding how it works helps you plan a realistic price range before you start shopping for a home in Texas.
What DTI measures
DTI compares your recurring monthly debt payments with your gross monthly income, meaning income before taxes and other deductions. The result is expressed as a percentage. A lower ratio means more of your income is free after debt payments, which lenders read as a lower risk that you will struggle to make the mortgage payment.
Front-end and back-end ratios
Lenders often look at two versions of the ratio:
- Front-end ratio (housing ratio): the proposed housing payment divided by gross monthly income. The housing payment typically includes principal, interest, property taxes, homeowners insurance, and any mortgage insurance or HOA dues.
- Back-end ratio (total DTI): the housing payment plus all other recurring monthly debts, divided by gross monthly income. This is the figure most people mean when they say DTI.
The maximum ratio a lender will accept depends on the loan program (conventional, FHA, VA, USDA), the automated underwriting result, your credit, your cash reserves and the lender's own rules. Because those limits change and vary between programs, ask lenders for their current guidelines rather than relying on a single rule of thumb.
Which debts usually count
- Minimum payments on credit cards, as shown on your credit report
- Auto loans and leases
- Student loans, including how the program treats deferred or income-driven payments
- Personal loans and installment loans
- Child support and alimony you are required to pay
- Payments on other real estate you own
Everyday expenses such as groceries, utilities, phone bills and car insurance are generally not part of DTI, even though they matter for your own budget.
Why Texas housing costs matter for the ratio
Texas has no state income tax, but property taxes are set locally by counties, cities, school districts and other taxing units, and they are paid through your mortgage escrow in most cases. Homeowners insurance costs can also vary a lot across the state, especially in areas exposed to hail, windstorms or flooding. Both feed directly into the housing payment, so two homes with the same price can produce very different DTI results. Look up the property's tax history on the county appraisal district or tax office website and get insurance quotes early.
How to calculate your own DTI
- Add up your gross monthly income from all sources a lender can document.
- List every monthly debt payment that appears on your credit report or court orders.
- Estimate the full housing payment for the price range you are considering, including taxes and insurance.
- Divide total monthly debts (including the housing estimate) by gross monthly income.
The mortgage calculators on this site can help you estimate the housing portion. Treat your result as a starting point; lenders apply program rules to income and debts that can change the final figure.
Ways to improve your DTI before applying
- Pay down revolving balances to lower minimum payments.
- Avoid new debt, such as a car loan or store card, in the months before and during the mortgage process.
- Pay off small installment loans if it fits your cash plan, but check with your lender first, because using savings can reduce the reserves you need.
- Document all eligible income, such as consistent overtime, bonus or part-time income with enough history.
- Adjust the price range or consider a larger down payment to lower the housing payment.
Bottom line
DTI shows lenders how a new mortgage payment fits with your existing obligations. Know which debts count, estimate the full housing payment including Texas property taxes and insurance, and work on lowering monthly obligations before you apply. Then compare what lenders say you can borrow with what your budget says you can afford.
This article is general information, not legal, tax or lending advice. Loan requirements differ between lenders and change over time, so confirm the details with your lender, the relevant agency or a licensed professional.