Debt-to-Income (DTI) Calculator
Estimate your total DTI and housing DTI in seconds. Helpful for mortgage pre‑checks, refinancing, and budgeting.
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What debt-to-income ratio means (and how to use it)
Debt-to-income ratio (DTI) is a simple comparison: how much you owe each month versus how much you earn each month. Lenders use it to estimate how comfortably you can take on a new payment. You can use it the same way, as a fast “reality check” before you apply.
Quick tip: run 2-3 scenarios, conservative, baseline, and optimistic, then compare the DTI results to see what actually changes your number.
How this DTI calculator works
The calculator uses monthly amounts. It adds your monthly housing payment (rent or mortgage) and your other monthly debt payments. Then it divides that total by your gross monthly income (before taxes) and converts it to a percentage.
We also show a housing-only ratio (often called a “front-end” ratio) because housing tends to be the biggest fixed cost. If your total DTI looks fine but your housing DTI is very high, your budget may still feel tight.
What to include in monthly debts (and what to exclude)
For DTI, think “required monthly payments,” not everything you spend. Include car loans, student loans, personal loans, and the minimum payment on credit cards. If you’re buying a home, your housing payment should reflect the expected monthly payment (principal + interest) plus recurring housing costs you must pay.
Typically excluded: groceries, utilities, insurance not tied to a loan, subscriptions, and other lifestyle costs. Those still matter for your budget, but they aren’t usually counted as debt obligations in DTI underwriting.
DTI ranges: what’s “good”?
There’s no single universal cutoff, but a practical rule is: lower is easier. Many borrowers aim for a total DTI below the mid‑30% range, with some programs allowing higher if the overall profile is strong. Your interpretation box uses a conservative set of bands so you can see when the ratio starts to become fragile.
If you want a second lens, look at “income left after debts.” Even a “passable” DTI can feel uncomfortable if the remaining cash is too small to handle groceries, childcare, maintenance, and emergencies.
How to lower your DTI (the levers that actually move it)
DTI improves when the numerator goes down (monthly debt) or the denominator goes up (monthly gross income). In practice, the biggest levers are: (1) a cheaper housing payment, (2) paying off or refinancing a car loan, or (3) reducing revolving debt and minimum payments.
Use this calculator as a planning tool: adjust your housing number by $100-$300 to simulate different home prices or interest rates. If you’re comparing loan offers, try our Loan APR Calculator to see how fees can change the real cost.
Common mistakes (and quick fixes)
The most common DTI mistake is using net pay instead of gross pay. Lenders usually use gross income, so this calculator does too. Another mistake is forgetting minimum credit card payments, those can add up quickly.
FAQ
What is debt-to-income ratio (DTI)?
DTI is your monthly debt payments divided by your gross monthly income, expressed as a percentage. It’s a quick way to measure how “committed” your income is before you take on new debt.
Is DTI based on gross income or net income?
Most lenders calculate DTI using gross income (before taxes and deductions). For personal budgeting, you may also want to sanity-check your cash flow using take-home pay, but underwriting typically starts with gross.
What counts as “monthly debt payments”?
Generally: housing payment, car loans, student loans, personal loans, and minimum credit card payments. The key idea is required monthly obligations tied to debt.
Do utilities, groceries, or subscriptions count in DTI?
Usually no. Those are living expenses, not debt obligations. They matter for your budget, but DTI is specifically about recurring debt payments.
What is housing DTI (front-end ratio)?
Housing DTI compares only your housing payment to your gross monthly income. It’s useful because housing is often the largest fixed cost, and a high housing ratio can make a budget feel tight even if total DTI looks acceptable.