Debt-to-Income (DTI) Ratio Calculator

Your debt-to-income ratio is the percentage of your gross (pre-tax) monthly income that goes toward paying debts. Lenders calculate it by adding up all your recurring monthly debt payments and dividing by your gross monthly income. It's one of the main figures lenders use to judge how much additional debt you can safely take on.

Front-end DTI (the housing ratio) only counts your monthly housing payment — for homeowners this is PITI (principal, interest, property taxes, homeowner's insurance, and PMI/HOA when applicable); for renters it's the rent. Back-end DTI counts ALL recurring monthly debt, including housing plus car loans, student loans, credit-card minimums, personal loans, and court-ordered payments like child support. When people say 'DTI' without qualification, they usually mean the back-end ratio.

Add up all your minimum monthly debt payments (housing + auto loans + student loans + credit-card minimums + other recurring obligations), then divide that total by your gross monthly income, and multiply by 100. For example, $2,000 in total monthly debt divided by $6,000 in gross monthly income equals a 33.3% back-end DTI.

Recurring, contractually-required minimum payments count: mortgage or rent, auto loans, student loans, personal loans, credit-card minimum payments, and court-ordered payments such as alimony or child support. Everyday living expenses — groceries, utilities, subscriptions, and insurance that isn't part of your housing payment — are NOT counted, even though they affect your real budget.

DTI always uses GROSS monthly income — your earnings before taxes, retirement contributions, and other payroll deductions are taken out. This is the definition used by the CFPB and every major U.S. mortgage program. Using your net (take-home) pay instead would understate your real DTI and give lenders (and this calculator) an inaccurate picture.

A back-end DTI at or below 36% is generally considered healthy and is the classic conventional-loan guideline (the '28/36 rule': 28% front-end, 36% back-end). A DTI between 37% and 43% is often still approvable, especially with strong credit and cash reserves — FHA loans, for instance, commonly allow up to 43% back-end (31% front-end). Above roughly 45–50%, most conventional lenders become far more selective, though some government-backed programs and strong compensating factors can still qualify a borrower.

No single legal maximum applies to every loan. The Consumer Financial Protection Bureau's old 43% 'Qualified Mortgage' DTI hard cap was replaced in 2021 by a price-based test comparing the loan's APR to the Average Prime Offer Rate — so 43% today is best treated as historical/rule-of-thumb context, not a hard legal ceiling. Individual loan programs (conventional, FHA, VA, USDA) and automated underwriting systems each set their own practical ceilings, which can be higher or lower depending on credit score, reserves, and other compensating factors.

DTI is a quick proxy for how much financial cushion you have to absorb a new monthly payment. A lower DTI suggests more income is left over each month to cover the new loan plus unexpected expenses, which lenders read as lower default risk. It's one input among several — credit score, employment history, cash reserves, and loan-to-value ratio all factor into an actual underwriting decision alongside DTI.

Not necessarily. A high DTI raises risk flags and often means a smaller loan amount or a higher interest rate, but strong compensating factors — excellent credit, significant cash reserves, a large down payment, or a stable long-term job — can still lead to approval above typical DTI guidelines. Conversely, a low DTI doesn't guarantee approval either; credit history, income stability, and other factors still matter.

You can lower DTI from either side of the equation: pay down or pay off existing debts to reduce the numerator (fastest impact from eliminating a whole monthly payment, e.g. an auto loan or credit card), or increase your gross income through a raise, side income, or an additional co-borrower. Avoiding new debt (auto loans, financed purchases, new credit lines) before applying for a mortgage or major loan also keeps your DTI from creeping up right when it matters most.

Yes, if you don't own a home, your monthly rent is the housing figure used for the front-end ratio. If you're applying for a mortgage to buy your first home, lenders typically compare your current rent to your prospective PITI payment — some also require a history of on-time rent payments as a compensating factor when your DTI is on the higher end.

The math is identical — total monthly debt divided by gross monthly income — but self-employed income is harder to document. Lenders typically average net income (after business expenses, but before personal taxes) over the most recent one to two years of tax returns rather than using gross revenue, and may add back certain non-cash deductions like depreciation. This can make a self-employed borrower's usable 'gross monthly income' figure lower than their bank-statement deposits would suggest.

Your back-end DTI caps the size of the new monthly housing payment a lender will approve, because your existing debts plus the new payment can't push the total ratio past the program's ceiling. In practice this means two borrowers with identical income but different existing debt loads (a car payment, student loans) qualify for very different loan amounts — the one with less other debt has more 'DTI room' left for housing. Run your numbers through the house affordability calculator or the home loan eligibility calculator to translate a target DTI into an actual price range.