The Division Problem
DTI adds up every monthly obligation, housing, car loans, student loans, credit-card minimums, alimony, and divides by gross income. It answers one question lenders care about deeply: can this borrower absorb another payment?
Two flavors: front-end (housing only) and back-end (everything). The 28/36 rule, 28% housing, 36% total, is the classic underwriting comfort zone.
What Your DTI Unlocks
Under 36%: most conventional products open. 36–43%: approvable but tighter, often with compensating factors. 43–50%: the Qualified Mortgage ceiling, possible in special programs, risky in practice. Above 50%: generally declined for new mortgages.
Note the blind spot: DTI uses gross income and ignores taxes and living costs. A 36% DTI household with two kids and a HCOL rent bill can still feel squeezed.
Lowering the Ratio, Fast
The highest-leverage moves: pay off small installment balances entirely (removing whole payments from the numerator), refinance high-rate debts to smaller payments, or add verifiable income.
A second job counts only with a two-year history; a co-signer shifts the math; and time heals, installment payments that finish before closing simply fall out of the ratio.
Sources
FAQ
What is a good DTI ratio?
36% or below overall, with housing under 28%. Above 43%, new mortgages get very difficult.
What counts toward DTI?
Credit obligations only, housing, loans, card minimums, alimony, child support. Utilities, groceries, and taxes don't.
How do I lower my DTI quickly?
Pay off small balances to remove entire payments, refinance to smaller minimums, or increase income, in that order.
Please read this first: these results are educational estimates. For real decisions, talk to a qualified professional.