Debt-to-Income Ratio Calculator
Calculate your debt-to-income (DTI) ratio by dividing monthly debt payments by gross monthly income. Lenders use DTI to assess creditworthiness and determine loan eligibility thresholds.
Sum of all monthly debt payments (mortgage, car, student loans, credit cards).
Must be greater than 0
Monthly income before taxes and deductions.
Results
DTI Ratio
25%
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Debt-to-Income Ratio Calculator. Follow the units and input format printed next to each field. Where a unit selector is available, choose the units that match your data.
Review your inputs
Double-check that all values are correct and match the units or format shown for each field. Incorrect units are the most common source of calculation errors and can produce results that are off by factors of 2, 10, or more.
Read the results
The Debt-to-Income Ratio Calculator computes the output in your browser and displays the results, with units clearly labeled, as soon as they are ready — no data sent to a server.
Explore parameter sensitivity
Try adjusting individual input values to see how the output changes. This is a quick and effective way to develop intuition about how different parameters influence the result and to identify which inputs have the largest effect.
When to Use This Calculator
- •Use the Debt-to-Income Ratio Calculator when comparing financial options side-by-side — such as different loan terms or investment returns — to make more informed decisions.
- •Use it to quickly estimate costs or returns before making purchasing, investment, or borrowing decisions.
- •Use it for financial education and planning to understand how compound interest, fees, or tax affects the real value of money over time.
- •Use it when building or reviewing a budget to verify that projections and calculations are mathematically correct.
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About Debt-to-Income Ratio Calculator
The debt-to-income (DTI) ratio calculator measures how much of your gross monthly income goes toward debt payments. This ratio is one of the most important factors lenders examine when you apply for a mortgage, car loan, or credit card. A lower DTI indicates you have more income available for new debt, making you a less risky borrower. Most mortgage lenders prefer a DTI below 36%, with no more than 28% going to housing costs (the front-end ratio). For FHA loans, DTIs up to 43% may be acceptable. Knowing your DTI helps you understand your borrowing capacity, identify if you are overextended, and plan debt reduction strategies.
The Math Behind It
Formula Reference
Debt-to-Income Ratio
DTI = (Monthly Debt Payments / Gross Monthly Income) * 100
Variables: Monthly Debt = all recurring debt payments; Gross Income = pre-tax monthly income
Worked Examples
Example 1: Mortgage applicant
Monthly debts: $1,200 mortgage + $300 car loan = $1,500. Gross income: $6,000.
DTI is 25%, which is well within the typical 36% threshold for conventional mortgages.
Example 2: Heavy debt load
Monthly debts: $1,800 mortgage + $400 car + $500 student loans + $200 credit cards = $2,900. Income: $5,500.
DTI is 52.7%, which exceeds most lender limits and indicates financial stress.
Common Mistakes & Tips
- !Using net (after-tax) income instead of gross (pre-tax) income, which inflates the DTI ratio.
- !Excluding debt payments like student loans or credit card minimums from the calculation.
- !Comparing your DTI to standards without considering your complete financial picture (assets, emergency fund, etc.).
Related Concepts
Used in These Calculators
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Frequently Asked Questions
What is a good debt-to-income ratio?
Below 36% is generally good for qualifying for mortgages. Below 20% is excellent. Above 43% makes it difficult to qualify for most conventional loans.
Does rent count as debt for DTI?
For a new mortgage application, your proposed mortgage payment replaces rent in the DTI calculation. Current rent is generally not counted as a debt in the same way.
How can I lower my DTI?
Either increase your income or reduce your debt. Pay off credit cards, avoid new loans, refinance at lower rates, or extend loan terms to reduce monthly payments (though this increases total interest).
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