DTI Calculator
Calculate your debt-to-income ratio before applying for a mortgage, personal loan, auto loan, or refinance. Understand how lenders view your borrowing strength.
Monthly Income
Total income before taxes or deductions.
Housing Costs (Front-End)
Include expected property tax, insurance, and HOA.
Other Debts (Back-End)
Your Borrowing Room
Lenders look at these two numbers to decide if you can afford a loan.
Front-End DTIHousing Only
Back-End DTITotal Debt
Approval Signal: Borderline / Moderate Risk
Your DTI is between 36% and 43%. Many lenders will still approve you, but you may face stricter credit or reserve requirements.
Your Income Looks Strong — But What Do Your Debts Say?
A good income does not always mean strong loan affordability. Lenders also want to know how much of your income is already committed to debt.
That is where your debt-to-income ratio, or DTI, becomes important. A DTI calculator helps you see how much of your monthly income goes toward existing debts before adding a new loan payment. The lower your DTI, the more room you may have for a mortgage or other loan. The higher your DTI, the more careful lenders may be.
The Simple DTI Formula
DTI is calculated by dividing your total monthly debt payments by your gross monthly income.
For example, if your monthly debts are $2,000 and your gross monthly income is $6,000, your DTI is about 33%. This number helps show whether your income can comfortably support your debts.
What Counts as Monthly Debt?
A DTI calculator usually includes debts that appear as regular monthly obligations. Add payments such as:
- • Mortgage or rent payment
- • Car loans
- • Student loans
- • Credit card minimum payments
- • Personal loans
- • Child support or alimony
- • Other installment loans
Do not confuse normal living expenses with debt. Utilities, groceries, gas, subscriptions, and phone bills may affect your budget, but they are usually not counted the same way as monthly debt obligations.
Front-End vs Back-End DTI
There are two useful ways to view DTI.
Front-end DTI focuses on housing costs only. This may include mortgage principal, interest, property taxes, homeowners insurance, PMI, and HOA fees.
Back-end DTI includes housing costs plus other debts like auto loans, credit cards, student loans, and personal loans.
For mortgage planning, back-end DTI often gives the stronger affordability picture because it shows your full debt load.
Why DTI Matters for Mortgage Approval
DTI helps lenders judge whether a borrower may be able to manage a new monthly payment.
A lower DTI can make your application look stronger because less of your income is already tied to debt. A higher DTI may limit loan options, reduce approval chances, or require stronger credit, reserves, or income documentation.
DTI is not the only factor. Credit score, down payment, employment history, savings, loan type, and property details also matter.
Example DTI Scenario
Suppose your gross monthly income is $7,500. Your monthly debts are:
- • Car loan: $450
- • Student loan: $300
- • Credit card minimums: $150
- • Estimated new mortgage payment: $2,100
Total monthly debt: $3,000
This helps you see whether the new mortgage payment fits your current financial position before applying.
How to Lower Your DTI
You can improve your DTI by reducing debt or increasing qualifying income. Smart moves include:
- Pay down credit card balances
- Avoid taking new loans before applying
- Refinance or consolidate high-payment debt
- Increase income where possible
- Choose a lower mortgage payment
- Make a larger down payment
- Pay off small loans before applying
The fastest improvement often comes from lowering monthly debt payments, not just reducing spending.
Smart DTI Checks Before Applying
Before using your DTI result to make a decision, review:
- Gross monthly income
- All recurring debt payments
- Estimated new mortgage payment
- Property taxes and insurance
- PMI or HOA fees
- Credit score & cash reserves
A DTI calculator gives direction, but lender approval depends on the full financial profile.
Quick DTI Answers
How is DTI calculated?
DTI is calculated by dividing your total monthly debt payments by your gross monthly income, then multiplying by 100 to get a percentage.
What is the difference between front-end and back-end DTI?
Front-end DTI focuses only on housing costs (mortgage, taxes, insurance). Back-end DTI includes housing costs plus all other minimum monthly debt payments (car loans, credit cards, student loans).
What is considered a good DTI for a mortgage?
Most lenders prefer a back-end DTI under 36%, though many will approve loans up to 43%, and some specific programs may allow up to 50% with strong compensating factors.
Does DTI include living expenses?
No. DTI only includes required debt obligations. It does not include living expenses like groceries, gas, utilities, or entertainment subscriptions.