How do you calculate your debt-to-income ratio?

Add up all your monthly debt payments — mortgage or rent, car loans, student loans, minimum credit card payments, personal loans, and child support. Divide that total by your gross monthly income (before taxes). Multiply by 100 to get your percentage. Example: $2,000 in monthly debts divided by $5,000 gross income = 40% DTI.

What is a good debt-to-income ratio for a mortgage?

Most lenders prefer a DTI of 36% or lower, but will approve up to 43% for conventional loans and up to 50% for FHA loans with compensating factors like savings or a higher credit score. The lower your DTI, the better your interest rate and the more loan options you have.

What debts are included in DTI for a mortgage?

Monthly payments for: mortgage or rent, car loans, student loans, credit card minimums, personal loans, child support, and alimony. NOT included: utilities, insurance premiums, groceries, subscriptions, or other living expenses. Only debts that appear on your credit report count.

How can I lower my DTI quickly before applying for a mortgage?

Three fastest strategies: 1) Pay off the smallest debts entirely to eliminate those monthly payments. 2) Increase your income with a raise, side job, or adding a co-borrower. 3) Refinance high-payment debts into longer terms for lower monthly payments. Avoid taking on any new debt.

How to Calculate Your Debt-to-Income Ratio for Mortgage Approval: Complete Guide

Overview

This guide explains how to calculate your debt-to-income (DTI) ratio, a crucial metric lenders use when evaluating mortgage applications. Your DTI ratio comprises 30% of UQUAL's Loan Readiness Score.

Key Concepts

Two Types of DTI Ratios

The front-end ratio focuses on housing expenses alone, with a recommended maximum of 28%. The back-end ratio encompasses all monthly debts and typically should not exceed 43% for conventional loans. For proven tactics to bring these numbers down, see our strategies to lower your debt-to-income ratio.

Calculation Steps

1. Determine Gross Monthly Income

Salaried employees: Annual salary ÷ 12
Self-employed: Average of last two years of tax returns
Include spouse's income if applying jointly
Document variable income with two-year history

2. Identify Monthly Debt Obligations

Include:

Credit card minimums
Car loans
Student loans
Personal loans
Existing mortgages

Note: Utilities and groceries are excluded from DTI calculations. If you carry student loan debt, be aware that different loan programs treat those payments differently—learn more about how student loan payments factor into your DTI.

3. Perform the Calculation

Back-end DTI = (Total Monthly Debts ÷ Gross Monthly Income) × 100

Example: $2,000 ÷ $6,000 × 100 = 33.3%

Your DTI is just one piece of the puzzle. Lenders also weigh your credit history heavily, so understanding the credit score and DTI requirements by loan type gives you a clearer picture of where you stand.

Keep Reading

What is Loan Readiness? — Why mortgage readiness goes beyond just your credit score
How to Improve Your Credit Before Applying for a Mortgage — Specific steps to raise your score before you apply
Should You Pay Off Credit Cards Before Applying? — When to pay down debt vs. save for a down payment
Student Loans and Mortgage Qualification — How student debt affects your DTI and what to do about it

UQUAL Team

Financial Education Team

The UQUAL Team creates educational content to help aspiring homeowners become loan-ready through financial literacy, credit building, and mortgage preparation.