What Is Debt-to-Income Ratio?
Debt-to-income ratio compares your monthly debt payments to your gross monthly income. Learn what DTI lenders require and how to improve yours.
Definition
Debt-to-income ratio (DTI) is the percentage of your gross monthly income that goes toward paying debts. The formula is: DTI = Total Monthly Debt Payments / Gross Monthly Income x 100. If you earn $6,000 per month and pay $2,000 in monthly debts (mortgage, car, student loans, credit cards), your DTI is 33%.
Mortgage lenders use DTI as a key factor in determining how much house you can afford. Most conventional loans require a DTI of 43% or lower. FHA loans may allow up to 50% DTI with compensating factors. The lower your DTI, the more likely you are to be approved and the better your terms will be.
There are two versions: front-end DTI (housing costs only divided by income) and back-end DTI (all debts divided by income). A common guideline is front-end DTI below 28% and back-end DTI below 36%, though many lenders allow higher ratios. The 28/36 rule is a useful starting point for determining how much house you can comfortably afford.
Real-World Example
You earn $7,500 gross monthly income. Your debts include: $1,500 mortgage payment, $400 car payment, $300 student loans, and $200 credit card minimums. Total monthly debt = $2,400. DTI = $2,400/$7,500 = 32%. This is within the comfort zone for most lenders. If you wanted to buy a bigger house with a $2,200 mortgage payment, your DTI would jump to 41% -- still technically qualifying but leaving little margin for financial surprises.
Why It Matters
Your DTI is a reality check on whether you can actually afford your debts. A high DTI means most of your income is already spoken for, leaving little room for savings, emergencies, or enjoying life. Even if a lender approves you at 43% DTI, living at that level is stressful and leaves you one job loss or medical bill away from financial crisis. Target a DTI below 30% for comfort, and below 20% for real financial flexibility.
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Frequently Asked Questions
What is a good debt-to-income ratio?
Below 36% is generally considered healthy. Below 20% gives you excellent financial flexibility. Mortgage lenders typically require 43% or lower, but qualifying at the maximum does not mean you should -- it leaves very little margin.
What debts count in DTI?
Monthly minimum payments on: mortgage/rent, car loans, student loans, credit cards, personal loans, child support, and alimony. Utilities, insurance, phone bills, and subscriptions typically do not count in DTI calculations.
How can I lower my DTI?
Either increase your income or decrease your debt payments. Pay off debts (especially high-payment items like car loans), refinance to lower payments, avoid taking on new debt, or increase your income through raises, side work, or career changes.
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