Debt-to-income ratio is the first test almost every lender runs: how much of your gross monthly income is already promised to debt payments. Nothing else about your budget is visible to them, so the ratio decides how large a loan you can be approved for, and often the rate you are offered.
Debt-to-income ratio
32%
$2,400.00 of debt payments against $7,500.00 of gross monthly income — comfortable.
Lenders only test the debt slices. Everything else is what the household actually lives on.
| Guideline | Your ratio | Status | Monthly room |
|---|---|---|---|
| Housing at 28% of gross income | 24% | Within limit | $300.00 |
| All debts at 36% of gross income | 32% | Within limit | $300.00 |
| All debts at 43% of gross income | 32% | Within limit | $825.00 |
| All debts at 50% of gross income | 32% | Within limit | $1,350.00 |
Room is the extra monthly payment this ratio can absorb at your income, or the amount by which you are over it.
| Item | Amount | Share of gross income |
|---|---|---|
| Gross monthly income | $7,500.00 | 100.0% |
| Housing payment | $1,800.00 | 24% |
| Other debt payments | $600.00 | 8% |
| Total debt payments | $2,400.00 | 32% |
| Left after debt payments | $5,100.00 | 68% |
| Maximum debt at the 43% line | $3,225.00 |
What is left after debt payments still has to cover tax, food, transport and savings.
This calculator splits the ratio in two. The front-end figure covers housing only, the back-end figure adds every other debt payment, and the table shows how much room is left before each limit lenders talk about.
Take gross monthly income before tax and deductions. Add up every required monthly debt payment: rent or the full mortgage payment (principal, interest, property tax and insurance), car loans, student loans, personal loans, child support and the minimum payment on each credit card.
Divide the total by gross monthly income. A household earning $90,000 a year has $7,500 a month; $2,400 of debt payments is a back-end DTI of 32%.
The ratio is a substitute for seeing your whole budget. A borrower at 30% has room to absorb a rate change or a month of reduced income; a borrower at 48% does not. That is why pricing gets worse above 43% and approvals become rare above 50%.
The 28% front-end rule is the same logic applied to housing alone: it is the share of income a household can commit to a home without becoming fragile.
Utilities, groceries, insurance premiums that are not part of a mortgage payment, subscriptions and tax are not part of DTI. Neither are retirement contributions, though they reduce the income actually available to pay a loan.
Debts you will clear before applying can be excluded, usually once the account reports a zero balance. Overtime, bonuses and side income count only when the lender accepts them as stable, which often takes a two-year history.
Each example below was run through the calculator on this page when the site was built, so the numbers match what you see when you enter the same inputs.
Debt-to-income ratio
32%
$2,400.00 of debt payments against $7,500.00 of gross monthly income — comfortable.
A 32% back-end ratio leaves more than $800 a month of headroom before the 43% ceiling.
Debt-to-income ratio
50%
$2,500.00 of debt payments against $5,000.00 of gross monthly income — stretched.
Only income changed: identical payments now consume half of gross income.
Debt-to-income ratio
45.3%
$3,400.00 of debt payments against $7,500.00 of gross monthly income — stretched.
The new payment pushes the ratio past 45%, above the line most automated approvals use.
Debt-to-income ratio
24%
$1,800.00 of debt payments against $7,500.00 of gross monthly income — comfortable.
Paying the card off removes its whole minimum from the ratio, the cheapest way to qualify.
Under 36% is comfortable, and housing under 28% is the traditional target. Between 36% and 43% is workable but leaves little margin. Above 43% most lenders tighten terms or decline, and above 50% approval becomes rare.
Front-end covers housing only. Back-end adds every other debt payment on your credit report. Mortgage underwriting looks mainly at the back-end figure, while the front-end number shows how much housing payment the income can carry.
Gross income, before tax and deductions, because that is what lenders use. Take-home pay is the more honest figure for a personal budget, since tax and retirement contributions leave before the money reaches you.
Yes. A lender puts your current rent in the same place as a mortgage payment, which is why moving from renting to buying often barely changes the ratio when the payment is similar.
Its minimum payment leaves the ratio once the account reports a zero balance, usually with the next statement. Closing the account is a separate decision with its own credit-score effects, so check the timing before you do it.
Sometimes. Loans above 43% exist, especially with strong credit, a large down payment or compensating factors such as cash reserves. They are priced more strictly and often need a human underwriter rather than an automated decision.
Usually yes, at a set percentage of the balance even while no payment is due, though lenders differ. Ask which calculation the lender uses before you rely on a deferment to qualify.
Last reviewed 2026-09-14. This page is an estimate tool, not financial, tax or legal advice.Read the full disclaimer.