Wondering how your existing debt could affect a mortgage application? Use this free online DTI calculator to compare your gross monthly income with your total monthly debt payments. Enter both amounts to estimate your debt-to-income ratio (DTI), see how much of your income goes toward debt, and understand what the result may mean as you prepare to apply for a mortgage.
How to Calculate Your Debt-to-Income Ratio
Your debt-to-income ratio compares your monthly debt obligations with your gross monthly income before taxes and other deductions. To calculate DTI, divide your total monthly debt payments by your gross monthly income and multiply by 100.
For example, if you earn $6,000 per month before taxes and have $2,400 in monthly debt payments, your DTI is 40%. Enter your own figures above to estimate your ratio.
What Is a Good DTI Ratio for a Mortgage?
A lower DTI generally indicates that less of your gross income is committed to debt payments, which may help when applying for a mortgage. However, there is no single DTI threshold that guarantees approval for every borrower.
Lenders may consider the loan program, credit history, income stability, assets, and other financial details. Learn more about what makes a good debt-to-income ratio for a mortgage.
Which Debts Should You Include?
Your calculation should reflect the monthly debt obligations relevant to your situation. These may include car loan payments, minimum credit card payments, student loan payments, personal loan payments, and other qualifying recurring debts.
Mortgage lenders may calculate and treat certain obligations differently depending on their underwriting rules. Read our guide to which debts count toward mortgage DTI to understand what may need to be included.
How DTI Can Affect Mortgage Approval
Your DTI is one factor lenders may use to assess whether you can manage a proposed mortgage alongside your existing obligations. A high ratio may limit some options, while a lower ratio may provide more flexibility.
However, this calculator uses only the income and debt figures you enter; it does not include a proposed mortgage payment or assess your credit, savings, employment, or loan-program requirements. A result from this tool cannot confirm mortgage eligibility or guarantee approval.
Ways to Improve Your Debt-to-Income Ratio
You may be able to lower your DTI by paying down qualifying debts, reducing recurring obligations, or increasing your gross income. Before making changes, consider your savings, essential expenses, and financial priorities.
Avoid using all your available cash to pay down debt if doing so would leave you unprepared for emergencies or home-buying costs. For practical ideas, read our guide on how to lower your DTI before applying for a mortgage.
Estimate Your Mortgage Affordability
DTI is only one part of deciding what home price and mortgage payment may fit your finances. Your proposed housing payment, property taxes, homeowners insurance, mortgage insurance, and other costs can affect your budget.
Use our mortgage affordability calculator to explore a potential home budget, then use the mortgage calculator to estimate payments based on a loan amount and other assumptions.
Frequently Asked Questions
Calculation Methodology & Data Transparency: This interactive tool was developed by Ratiranjan Singha using standard financial amortization algorithms. Estimated rates, limits, and guidelines are benchmarked against public data from primary institutions, including the CFPB and Freddie Mac. Results are provided for educational and estimation purposes only.
