Debt-to-Income Ratio Calculator - Front and Back DTI (2026)

A debt-to-income ratio is a financial metric that compares your total monthly debt payments to your gross monthly income. Lenders use it to determine your ability to manage monthly payments and determine the maximum loan amount you can afford without becoming overextended.

For standard mortgage and loan applications, you must use your gross monthly income (income before taxes). Lenders use gross income because it is a consistent baseline that doesn't vary based on your personal tax deductions or elective withholdings like 401(k) contributions.

The 28/36 rule is a classic lending guideline stating that a household should spend no more than 28% of its gross monthly income on housing costs (front-end DTI) and no more than 36% on all debt obligations combined (back-end DTI).

No. DTI ratios only include debt obligations that appear on your credit report (like loans and credit cards) plus your housing costs. Non-debt expenses like food, utility bills, car insurance, and childcare are not included in a lender's DTI calculation, though they are critical for your personal budget.

Lenders include your monthly student loan payment in your back-end DTI. If you are on an income-driven repayment plan with a $0 payment, many lenders will still calculate a "shadow payment" (typically 0.5% to 1% of the total balance) to account for the eventual cost of the debt.

Yes, it is possible through specific programs like FHA loans or with a "conventional" loan that passes automated underwriting. However, qualifying at 50% usually requires a high credit score, substantial cash reserves (6-12 months of payments), or a large down payment.

The fastest way to lower your DTI is to pay off debts with the highest monthly payments, such as a car loan near its end or a high-interest personal loan. Because DTI is based on the monthly payment amount rather than the total balance, clearing a small-balance, high-payment debt provides the most relief.

On a $5,000 monthly gross income, an extra $200 in monthly debt increases your DTI ratio by exactly 4 percentage points. This could move a borrower from an "Excellent" 35% ratio to a more borderline 39% ratio, potentially impacting their interest rate.

This calculator does not model: (1) variable tax rates; (2) seasonal income fluctuations; (3) non-debt living expenses like childcare or healthcare; or (4) the specific "overlay" rules that individual lenders may apply to different loan products.

No. Credit utilization compares your credit card balances to your credit limits (a balance-to-limit ratio). DTI compares your monthly debt payments to your income (a payment-to-income ratio). While both impact your loan eligibility, they measure two different types of financial risk.