Debt-to-Income Calculator
Total monthly debt payments over gross monthly income gives your DTI — the ratio lenders weigh most. Lower is safer; common guidelines sit at or below 36%. Your own numbers.
How much of your income goes to debt
Lenders commonly look for ≤36%, with housing ≤28% — but thresholds vary by loan and lender.
The Debt-to-Income (DTI) ratio is calculated by dividing your total monthly debt payments by your gross monthly income, then multiplying by 100 to express it as a percentage. The formula is: DTI = (Total Monthly Debt Payments / Gross Monthly Income) × 100. Total Monthly Debt Payments include all recurring obligations such as mortgage or rent, minimum credit card payments, auto loans, student loans, personal loans, child support, and alimony. Gross Monthly Income is your income before taxes and deductions, including salary, wages, bonuses, commissions, self-employment income, rental income, and any other regular inflows. This ratio is calculated this way because lenders use it to assess your ability to manage additional debt; it reflects the portion of your income already committed to debt servicing. A lower DTI indicates more disposable income and lower risk for lenders. The calculation is standardized across lending industries to ensure comparability, and it is a key factor in mortgage underwriting, auto loans, and credit card approvals. Note that expenses like utilities, insurance, groceries, and taxes are excluded, as they are not contractual debt obligations.
Salaried Employee with Mortgage and Car Loan
Jamie earns a gross monthly salary of $5,000. Her monthly debt payments include: mortgage of $1,200, car loan of $350, and minimum credit card payments of $100. Total debt payments = $1,200 + $350 + $100 = $1,650. DTI = ($1,650 / $5,000) × 100 = 33%. This is below the 36% guideline, so Jamie is in a good position for additional credit.
Self-Employed Freelancer with Student Loans
Alex is a freelance graphic designer with variable income. Over the past year, his average gross monthly income was $4,200. His monthly debt payments are: student loans of $400, a personal loan of $200, and minimum credit card payments of $150. Total debt payments = $400 + $200 + $150 = $750. DTI = ($750 / $4,200) × 100 ≈ 17.9%. This low DTI suggests Alex has strong income relative to debt, though lenders may scrutinize self-employment income stability.
Part-Time Worker with Rental Income and Multiple Debts
Pat works part-time earning $2,000 gross monthly, plus receives $800 monthly from a rental property. Gross monthly income = $2,000 + $800 = $2,800. Monthly debts: rent (since they don't own) of $900, two credit cards with minimum payments of $50 each ($100 total), and a personal loan payment of $300. Total debt payments = $900 + $100 + $300 = $1,300. DTI = ($1,300 / $2,800) × 100 ≈ 46.4%. This is above the 36% threshold, indicating high debt burden; Pat may struggle to qualify for new credit and should consider reducing debt or increasing income.
A good DTI ratio is generally considered to be 36% or lower, with no more than 28% of that going toward housing costs (front-end ratio) for mortgages. Ratios between 36% and 49% may still qualify for some loans but signal moderate risk; lenders might require compensating factors like a high credit score or large down payment. A DTI of 50% or above is typically considered high risk and often leads to loan denial. However, these thresholds vary by lender and loan type—for example, FHA loans allow up to 43% in some cases, while USDA loans can go to 41%. The key principle is that a lower DTI indicates greater financial flexibility and lower default risk. Your DTI should be interpreted in context: stable income, asset reserves, and credit history also matter. If your DTI is high, focus on paying down debts or increasing income before applying for major credit. Remember, this is a snapshot; your actual financial health depends on many factors beyond this single ratio.
A common mistake is including non-debt expenses like utilities, groceries, insurance, or taxes in the debt total—these are not contractual debts and are excluded. Another error is using net (after-tax) income instead of gross income, which inflates the DTI. People also forget to include all minimum credit card payments (even if they pay in full each month, the minimum is what lenders consider). For self-employed individuals, using a single month's income instead of an average can misrepresent stability. Edge cases: If you have irregular income (commission, freelance), lenders may use a two-year average; ignoring this can cause miscalculation. Also, some debts like 0% financing or deferred student loans are still counted if they require any payment. Finally, not updating the calculation after paying off a debt or changing income leads to outdated ratios.
- Gross Monthly Income
- Your total income before any taxes or deductions are taken out, including salary, wages, bonuses, commissions, and other regular income.
- Total Monthly Debt Payments
- The sum of all minimum required payments on recurring debts, such as mortgages, auto loans, student loans, credit cards, and personal loans.
- Front-End DTI
- A subset of DTI that only includes housing costs (mortgage principal, interest, taxes, insurance) divided by gross monthly income, used primarily in mortgage underwriting.
- Back-End DTI
- The full DTI ratio that includes all monthly debt payments, including housing and other debts, divided by gross monthly income.
- Debt-to-Income Ratio (DTI)
- A financial metric that compares your total monthly debt payments to your gross monthly income, expressed as a percentage, to assess your borrowing risk.
What debts are included in the DTI calculation?
Include mortgage or rent, minimum credit card payments, auto loans, student loans, personal loans, child support, and alimony. Exclude utilities, insurance, groceries, and taxes.
Should I use gross or net income?
Always use gross income (before taxes and deductions) as lenders use this to standardize comparisons.
What is a good DTI ratio?
A DTI of 36% or lower is generally considered good, with housing costs ideally under 28% of income.
Can I still get a loan with a high DTI?
Yes, but it may be harder. Some lenders accept up to 43-50% with strong compensating factors like a high credit score or large down payment.
How often should I calculate my DTI?
Calculate it whenever your income or debts change significantly, or before applying for new credit.
Does my DTI affect my credit score?
No, DTI is not directly in credit scores, but lenders use it separately to evaluate your loan application.
What if I have irregular income?
Use an average of your gross monthly income over the last 12-24 months to get a more accurate DTI.
Are student loans in deferment counted?
If they require no payment, they may be excluded, but if a minimum payment is required (even $0), some lenders still count it.
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