Debt-to-Income Ratio Calculator
Calculate your debt-to-income ratio — the front-end (housing) and back-end (total debt) figures lenders use — and see where you fall against typical approval limits.
Cómo usar esta calculadora
- 1Add up your gross monthly income from all sources, before tax.
- 2Enter your total housing payment, including tax, insurance, and fees.
- 3Enter your other monthly debt payments — car, student, cards, and more.
- 4Read your front-end and back-end ratios and compare them to lender limits.
Cómo funciona
Debt-to-income ratio
front-end DTI = housing payment ÷ gross monthly income back-end DTI = total monthly debt ÷ gross monthly income expressed as a percentage gross = income before tax
Debt-to-income ratio measures how much of your income is already committed to debt. It comes in two forms. The front-end (or housing) ratio counts only your housing payment — mortgage or rent plus property tax, insurance, and any association fees — as a share of gross monthly income. The back-end ratio adds every other recurring debt payment: car loans, student loans, minimum credit-card payments, and other loans. Both use gross, pre-tax income, which is why the ratio looks lower than the pressure you feel from take-home pay. Lenders weigh the back-end ratio heavily because it captures the total claim on your income; the lower it is, the more room you have to take on a new loan and absorb a financial shock.
Ejemplo resuelto
On $6,000 gross monthly income with a $1,500 housing payment and $800 of other debt (car, student loan, cards), the front-end ratio is 1,500 ÷ 6,000 = 25%, and the back-end ratio is 2,300 ÷ 6,000 = 38%. That back-end figure is just above the classic 36% guideline but within the 43% qualified-mortgage limit.
Debt-to-Income Ratio Calculator: la guía completa
Why lenders care about DTI more than income
A high income does not guarantee a loan approval, and a modest one does not rule it out — what matters is how much of that income is already spoken for. Debt-to-income ratio is how lenders quantify this. Someone earning a large salary but carrying heavy car, card, and student-loan payments may have less genuine capacity to take on a mortgage than someone earning less with no other debts. DTI captures that capacity in a single percentage, which is why it sits at the centre of nearly every lending decision.
The logic is about risk. A borrower whose debts already consume a large share of income has little cushion; a job loss, medical bill, or rate rise could tip them into missed payments. A lower DTI means more slack to absorb shocks and keep paying. Lenders have learned over decades that DTI predicts default better than income alone, so they set ceilings on it and will decline or reprice a loan that pushes a borrower past them, regardless of how large the salary is.
Front-end, back-end, and the 28/36 rule
The two ratios answer different questions. The front-end ratio asks how much of your income the home itself will consume, and the back-end asks how much all your debt consumes together. A long-standing guideline, the 28/36 rule, says housing should stay under 28% of gross income and total debt under 36%. Conventional mortgage programs are built around numbers close to these, and staying inside them generally means comfortable approval.
Regulation stretched the ceiling further. The qualified-mortgage standard set a back-end limit of 43% as the point beyond which loans are considered higher-risk, and many government-backed loans allow even more with compensating factors — a large down payment, cash reserves, or a strong credit score. But qualifying for a payment is not the same as being able to live with it comfortably. The gap between the 36% guideline and the 43% legal ceiling is exactly the zone where borrowers can get approved for more than they should prudently take on.
Lowering your ratio before you borrow
Because DTI is a ratio, there are two levers: reduce debt payments or raise income. In the months before applying for a big loan, paying down or eliminating a high-payment debt can have an outsized effect — clearing a car loan removes its entire monthly payment from the numerator, often dropping the ratio by several points. Avoid taking on new debt in that window too; a new financed purchase can quietly push you over a threshold just as an underwriter looks.
One subtlety worth knowing is that DTI counts the monthly payment, not the balance. A large loan with a small payment hurts the ratio less than a small loan with a large payment, which is why refinancing to a longer term can lower DTI even though it costs more in total interest. That can be a legitimate tactic to qualify, but it trades a better ratio today for more interest over time. The healthiest position is simply to keep total debt payments well under a third of gross income, leaving genuine room in the budget rather than engineering the number to squeeze past a limit.
Preguntas frecuentes
What is a good debt-to-income ratio?
A back-end DTI of 36% or below is considered healthy and sits within most conventional lenders' limits. Up to 43% is acceptable for a qualified mortgage, and above that borrowing options narrow quickly. For the front-end housing ratio, 28% or less is the traditional guideline.
What's the difference between front-end and back-end DTI?
Front-end DTI counts only your housing payment as a share of gross income; back-end DTI adds all other debts — car, student, credit cards, and more. Lenders weigh the back-end ratio most heavily because it reflects your total debt burden, while the front-end shows what the home alone costs.
Does DTI use gross or net income?
Gross, pre-tax income. This is why your DTI on paper looks lower than the strain you feel from take-home pay, which is reduced by taxes and other deductions. Always use total income before tax when calculating the ratio to match how lenders assess it.
How can I lower my debt-to-income ratio?
Reduce monthly debt payments — paying off a loan removes its whole payment from the ratio — or increase income. Avoid new debt before applying for a mortgage. Since DTI counts payments not balances, refinancing to a longer term also lowers it, though at the cost of more total interest.