What is a debt-to-income ratio?
Your debt-to-income ratio (DTI) is the share of your gross monthly income that goes toward debt payments. It is the single most important number lenders look at when deciding whether to approve a mortgage, car loan or new credit line — and it is one of the clearest answers to the question how much debt is too much. This debt-to-income calculator works it out in seconds and shows where you stand against the thresholds banks actually use.
Front-end vs back-end DTI
There are two versions of the ratio, and lenders care about both. Front-end DTI counts only your housing payment — rent or mortgage including taxes and insurance — as a percentage of gross income; lenders like to see this at 28% or below. Back-end DTI adds in every other monthly debt: credit cards, car loans, student loans and personal loans. The back-end number is the one most lenders rely on, and the calculator above shows both so you can see exactly which part of your budget is driving the figure.
What is a good debt-to-income ratio?
As a rule of thumb, a back-end DTI under 36% is healthy — you have comfortable margin and lenders will view you as low risk. Between 36% and 43% is manageable but tight; you can usually still borrow, but you are closer to the edge. Above 43% is the danger zone: 43% is the usual upper limit for a "qualified mortgage," and beyond it new credit becomes hard to get and your budget has little slack to absorb a financial shock. The status indicator above tells you which band you fall into and how much monthly room you have before crossing the next line.
How to lower your DTI
There are only two levers: reduce your monthly debt payments, or increase your income. Paying down a balance, refinancing to a lower payment, or clearing a small loan entirely all shrink the top of the ratio. Because the figure is based on monthly payments, eliminating even one small recurring payment can move your DTI noticeably. Our snowball vs avalanche tool helps you decide which debt to clear first, and the credit card payoff calculator shows how fast a balance disappears when you raise your payment.
DTI is part of a bigger picture
A healthy DTI means lenders will trust you with credit — but it is not the same as a healthy budget. Pair this ratio with our affordability calculator to check your real disposable income, and with the emergency fund calculator to make sure you have a cushion. Together they tell you not just whether a bank will lend to you, but whether borrowing is actually a good idea.