Debt-to-Income Ratio Calculator
Calculate the debt-to-income ratio lenders actually use, see which band you fall into, and find out how much debt you would need to clear to qualify comfortably.
Gross, not take-home — lenders use the pre-tax figure.
Include tax, insurance and HOA if you own.
Personal loans, child support, alimony.
Above the conservative benchmark but under the 43% line many lenders use as a qualified-mortgage ceiling. Expect more scrutiny of your credit and reserves.
Cutting $20 of monthly debt payments would bring you to the 36% benchmark. Clearing the smallest balance outright often moves this more than refinancing does.
The number lenders check before anything else
Your credit score gets the attention, but debt-to-income is often what decides a mortgage application. It answers a simpler question: of the money you earn each month, how much is already promised to someone else?
Two ratios, both worth knowing
Front-end is housing alone as a share of gross income. Back-end is every monthly debt payment including housing. When someone says “DTI” without qualifying it, they almost always mean the back-end figure.
The bands above are not arbitrary. 43% in particular is tied to qualified-mortgage rules, which is why it functions as a soft ceiling across much of the industry.
What counts, and what surprises people
Counts: rent or mortgage (with tax, insurance and HOA), auto loans, student loans — including deferred ones, which lenders often assess at a notional payment — credit card minimums, personal loans, child support, alimony.
Does not count: utilities, groceries, gas, insurance premiums, phone, streaming, day care. Real expenses, but not debt.
Two things catch people out. Student loans in deferment still count — a lender will typically impute a payment rather than treat it as zero. And co-signed loans count as yours, even if someone else reliably pays them.
The most effective fix is counterintuitive
Lenders use the minimum payment on your credit report, not what you actually pay. So paying $600 a month against a card with a $120 minimum improves your finances considerably and does nothing at all for your DTI until the balance reaches zero.
That flips the usual advice. To move this ratio, eliminate a payment completely rather than chip away at several. Clearing a $420 car loan drops your back-end ratio immediately. Putting the same money across three balances leaves three minimums on your report and barely moves the number.
If your goal is a mortgage in the next year, target the smallest balance you can retire outright — the credit card payoff calculator shows exactly when each balance clears. Then see what the improved ratio buys you in the home affordability calculator.
Gross, not net
The ratio uses pre-tax income, which is why lender limits feel more generous than they are. At 36% of gross you may be committing something closer to 45% of your actual take-home pay — before a single grocery run.
That gap is exactly why the conservative benchmark exists. Qualifying and being comfortable are different tests, and only one of them is run by your lender.
How this is calculated
Front-end ratio = housing payment ÷ gross monthly income Back-end ratio = all monthly debt payments ÷ gross monthly income Bands lenders and housing counselors use: ≤ 28% excellent ≤ 36% good ≤ 43% workable > 43% high
Frequently asked questions
- What DTI do I need to buy a house?
- Under 36% is comfortable and straightforward for most conventional lenders. Up to 43% is widely workable, since that is the threshold tied to qualified-mortgage rules. Above 43% is still possible with strong credit and cash reserves, or through FHA programs, but expect more scrutiny.
- Which debts count?
- Recurring monthly obligations that appear on your credit report — mortgage or rent, auto loans, student loans, credit card minimums, personal loans, and court-ordered payments like child support or alimony. Utilities, groceries, insurance and phone bills do not count.
- Do you use my minimum payment or what I actually pay?
- Lenders use the minimum payment shown on your credit report, even if you pay far more. That means aggressively overpaying a card improves your finances but does not improve your DTI until the balance is cleared and the account reports no minimum.
- What is the fastest way to improve my DTI?
- Eliminate a payment entirely rather than reducing several. Paying off a small auto loan removes its whole monthly obligation from the calculation. Spreading the same money across three balances leaves all three minimums intact and barely moves the ratio.
- Does my credit score affect my DTI?
- They are separate measures. Your score reflects payment history and utilization; DTI reflects payment burden against income. A high score with a high DTI still gets declined, and lenders look at both.