What is a good debt-to-income ratio (and why lenders care)
7 min read · Updated 2026-10-11 · MoneyCalc
Debt-to-income ratio is the single figure that most directly decides whether a mortgage is approved and at what price. It is simple arithmetic — total monthly debt payments divided by gross monthly income — but small changes in the numerator and denominator move it a lot, and lenders have firm thresholds.
How it is calculated
Add up every recurring monthly debt payment: mortgage or rent, car loans, student loans, personal loans, minimum credit-card payments, child support and any other fixed obligation. Divide by your gross monthly income — before tax. Multiply by 100 and you have your DTI as a percentage.
Only minimum payments on revolving debt are counted, not the full balance, which is why carrying large balances at low minimums can understate how stretched a borrower really is.
The thresholds that matter
Below 36% is generally considered comfortable and keeps the widest range of mortgage products open. Up to 43% is commonly the ceiling for a qualified mortgage. Above 43% approval becomes difficult and expensive, and above 50% most lenders will simply decline.
The type of loan changes the limit. Conventional loans often allow up to 43-45% with compensating factors; FHA loans can go higher with a larger down payment or strong reserves, but at a cost in insurance premiums.
- Under 36% — comfortable; best rates, most choice
- 36-43% — workable; standard approval range
- 43-50% — difficult; needs strong compensating factors
- Over 50% — usually declined by mainstream lenders
Why lenders are strict about it
Lenders are not assessing whether you deserve a loan, they are estimating the probability that a bad month will cause you to miss a payment. A high DTI means there is less room in the budget before something has to give, so the loan is riskier regardless of how diligent you are.
That is also why clearing debt is such a powerful lever. Paying off a $300-a-month car loan is worth far more to your borrowing capacity than saving the same $300 towards a bigger down payment.
How to improve yours quickly
There are only two directions: shrink the numerator or grow the denominator. On the debt side, paying off a single loan removes its whole monthly payment from the calculation, which is a bigger effect than the balance reduction alone would suggest. On the income side, documented raises, regular overtime or a side income can all be counted if they are stable and provable.
Avoid taking on new credit before applying for a mortgage. A new car loan taken out a few months before a home application can move you from comfortably approvable to borderline.
Run your own numbers
Free calculators that answer the “how much” version of this question. They run entirely in your browser — nothing you type is uploaded or stored.
Common questions
Does rent count toward DTI?
For a mortgage application, current rent is generally counted as a debt obligation. It is also why a new mortgage payment replaces rather than adds to it in the front-end ratio.
Does student-loan deferment remove it from DTI?
Not usually. Lenders typically count a percentage of the outstanding balance, often 0.5-1% per month, even when the loan is in deferment or on an income-driven plan.
MoneyCalc provides general information only and is not financial, investment, tax or legal advice. Figures are illustrative and depend on your own circumstances. See our full disclaimer.