Get a Live Quote by Email or Text
Request current rates and loan options based on this DTI snapshot. Add a mobile number if you prefer a text.
Calculator results are estimates for planning, not a loan approval, commitment, rate lock, or Loan Estimate.
What the DTI calculator calculates
Your debt-to-income ratio, or DTI, compares your monthly debt obligations to your gross monthly income. Lenders use it as a core underwriting number because it answers a simple question: after your housing payment and other debts, how much room is actually left in your budget.
This tool calculates two versions of the ratio. Front-end DTI only counts your monthly housing payment — principal, interest, taxes, insurance, and any HOA dues — against your income. Back-end DTI adds in every other recurring debt: car payments, student loans, credit-card minimums, personal loans, and child support or alimony if you have it. Back-end is the number most loan programs actually cap.
Neither ratio includes groceries, utilities, insurance premiums outside the mortgage, subscriptions, or other everyday spending. DTI is strictly a measure of debt payments against income, not a full household budget.
How to use it, step by step
- 1Enter your gross monthly income — the amount you earn before taxes and deductions, not your take-home pay.
- 2Enter your expected or current monthly housing payment, including principal, interest, property tax, homeowners insurance, and any HOA dues.
- 3Add your other monthly debt payments one line at a time: car loans, student loans, minimum credit-card payments, and any other installment or revolving debt that reports on your credit.
- 4Review the front-end and back-end ratios the calculator returns, along with where each one sits against common loan-program ceilings.
- 5Adjust an input — pay down a balance, target a lower home price, or add a co-borrower's income — to see how the ratio moves before you apply.
A worked example
Example inputs
- Gross monthly income
- $9,000
- Monthly housing payment
- $2,250
- Car payment
- $450
- Student loan + credit cards
- $300
Result
Front-end DTI here is $2,250 divided by $9,000, or 25% — inside the roughly 28% ceiling many conventional guidelines watch for.
Back-end DTI adds the $450 car payment and $300 in other debt to the $2,250 housing payment: $3,000 total divided by $9,000 income is 33%. That sits comfortably under the 36–45% range most conventional and government-backed programs allow, though the exact ceiling depends on the specific program and the borrower's overall file.
How to read the result
A lower DTI generally means more flexibility: more loan programs to choose from, and often better pricing, because the lender sees more income cushion relative to debt.
Most conventional loans target a back-end DTI at or below 43–45%, though some allow higher with strong compensating factors like a large down payment, significant reserves, or an excellent credit score. FHA, VA, and USDA loans each have their own guidelines and can sometimes stretch further.
If your ratio comes back higher than you expected, the fastest levers are paying down a revolving balance, targeting a lower home price or loan amount, or adding a co-borrower's income to the application.
Common mistakes
- Using take-home (net) pay instead of gross monthly income — DTI is always calculated on gross income, which makes the ratio look worse if you accidentally use net pay.
- Leaving out a debt that shows up on a credit report, like a co-signed loan or a monthly child-support obligation. Underwriting will find it even if the calculator doesn't.
- Forgetting property tax, homeowners insurance, and HOA dues when estimating the housing payment — principal and interest alone will understate front-end DTI.
- Assuming one DTI ceiling applies to every loan program. Conventional, FHA, VA, USDA, and jumbo loans each set their own limits and treat compensating factors differently.
Related guides
Frequently asked questions
Most lenders like to see a back-end DTI at or below 36%, though many conventional and government-backed programs allow 43% and sometimes higher with strong compensating factors like a large down payment or extra cash reserves. There's no single universal cutoff — it depends on the loan program.
No. DTI only counts recurring debt payments that typically show up on a credit report — housing, car loans, student loans, minimum credit-card payments, and similar obligations. Everyday living expenses like groceries, utilities, and non-mortgage insurance are not part of the ratio.
Gross income — your pay before taxes and other deductions. Using net (take-home) pay by mistake will make your DTI look higher than it actually is for underwriting purposes.
Front-end DTI only measures your housing payment against your income. Back-end DTI adds every other monthly debt on top of housing. Most loan programs focus on the back-end number, though some also set a front-end ceiling.
Pay down or pay off a revolving balance, avoid taking on new debt before closing, target a lower loan amount or home price, or add a co-borrower whose income offsets the ratio. Even a modest reduction in monthly debt can meaningfully improve back-end DTI.