Debt-to-income ratio: the number that decides how much you can borrow
Debt-to-income ratio, or DTI, is your total monthly debt payments divided by your gross monthly income — and for many lenders it matters as much as your credit score. It answers a simple question: after your existing bills, how much room is left for a new payment?
To calculate your DTI, add up your required monthly debt payments — mortgage or rent, auto loans, student loans, minimum credit-card payments, personal loans — and divide by your gross (pre-tax) monthly income, then multiply by 100. A $5,000 monthly income with $1,800 in debt payments is a 36% DTI. Lenders look at this number because it estimates how much of your income is already spoken for before a new payment even starts.
The ceiling depends on the loan. Conventional mortgages generally cap around 43%, though some programs stretch to 45–50% with strong compensating factors like a large down payment or cash reserves. FHA loans are more forgiving, often allowing up to 50%. VA loans have no hard DTI ceiling — the VA uses a residual-income test instead — which is one more reason VA is the strongest mortgage benefit for those who qualify. Personal-loan and auto lenders vary widely but commonly prefer DTI under 40–45%.
Two things do not count toward DTI: it uses gross income, not take-home pay, which makes the ratio look better than your actual cash flow feels; and it only counts debt payments, not everyday expenses like groceries, utilities, or insurance — so a low DTI does not automatically mean a payment is comfortable. Build your own budget alongside the DTI math before committing to a payment near the ceiling.
To lower DTI, you have exactly two levers: reduce the debt payments (pay off a card, consolidate several bills into one lower payment) or raise income (a raise, a second income source, or waiting to apply until a bonus posts). Paying off a smaller loan entirely, even if it is not the highest-rate one, can lower DTI more than paying down a larger balance partway, because it removes an entire monthly obligation from the calculation.
Questions people ask
What is a good debt-to-income ratio?
Under 36% is a widely used comfort threshold, and it is what most lenders consider strong. Above 43%, mortgage options narrow; above 50%, most conventional lenders decline regardless of credit score.
Does DTI include rent or just loan payments?
Yes — housing costs (rent or your current mortgage payment) count as part of DTI, along with every other required monthly debt payment: auto loans, student loans, minimum card payments, and personal loans.
Does DTI use gross or net income?
Gross (pre-tax) income. That makes DTI look more favorable than your actual take-home cash flow, so it is worth also checking your budget against net income before taking on a payment near the ceiling.
How do I lower my DTI quickly?
Pay off a smaller loan entirely rather than paying down a larger one partway — eliminating a whole monthly obligation moves the ratio more than a partial paydown. Consolidating several payments into one lower monthly payment can also help if it reduces your total required outflow.