What is debt-to-income ratio?

Debt-to-income ratio (DTI) is a percentage that compares how much you pay toward debt each month to how much you earn before taxes. Lenders use it to understand how much room you have in your budget for a new payment.

Knowing your DTI can help you make smarter borrowing decisions. It gives you an overview of whether your current debt is manageable, and what you need to do to increase your chances of approval before you apply.

Why is debt-to-income ratio important?

Your debt-to-income ratio matters because it shows how affordable your monthly debt payments are relative to your income.

Lenders use it as a quick way to assess risk, as a higher DTI indicates a high proportion of your income is already committed to existing bills, leaving less flexibility for a new loan payment.

DTI can influence whether you qualify for credit, how much you can borrow, and sometimes the terms you’re offered. Even with a good credit score, a high DTI could limit your options.

It can also help you plan and improve your finances. If your debt-to-income ratio is higher than expected, it may be a sign to avoid taking on more debt, pay down balances, or choose a smaller loan so your monthly payments stay manageable.

How to calculate your debt-to-income ratio

To calculate your debt-to-income ratio, add up your total monthly debt payments and divide that number by your gross monthly income (your income before taxes and deductions). Then multiply by 100 to turn it into a percentage.

The formula you need is:

(total monthly debt payments ÷ gross monthly income) × 100

A quick DTI example

Let’s say your gross monthly income is $5,000, and each month, you pay:

Rent: $1,400
Car loan: $350
Student loan: $200
Credit card minimum payments: $150

In this example, your total monthly debt payments are $2,100. Now calculate:

$2,100 ÷ $5,000 = 0.42
0.525 × 100 = 42%

In this example, your DTI is 42%, meaning that less than half of your gross monthly income goes toward debt payments.

What counts towards your DTI ratio?

Debt-to-income ratio is calculated using specific debts and income, so it helps to know what is included before you work out your percentage.

Debts included

DTI is based on required monthly debt payments, meaning obligations you are expected to pay each month under an agreement. This commonly includes:

Rent or mortgage payment
Personal loans
Auto loans or leases
Student loans
Minimum credit card payments (not the full balance)
Child support or alimony, if it’s an ongoing payment
Any other installment loans or debts that have a set monthly payment

As a rule, if it shows up as a scheduled payment on a statement or credit report, it’s probably included.

Income included

DTI uses your gross monthly income, which is your income before taxes and deductions. Income that’s typically counted includes:

Salary or hourly pay
Self-employment income
Consistent bonus or commission income
Pensions or other retirement income
Investment income, e.g. from stocks or rental properties
Social security benefits

Most lenders will include any steady and verifiable income.

What is usually not included

DTI does not include everyday living costs that are not considered debt payments, such as:

Utilities, phone, internet, and streaming services
Groceries and fuel
Insurance premiums that are not part of a loan payment
Medical bills that are not on a payment plan
Childcare costs
Discretionary spending, like dining out or entertainment

These costs still matter for your budget, but your debt-to-income ratio is specifically focused on debt payments relative to income.

What is a good debt-to-income ratio?

A good debt-to-income ratio gives you enough room in your budget to comfortably manage your existing bills and take on a new payment if needed.

There isn’t one perfect number, because an acceptable ratio will vary depending on the type of loan, the lender, and your overall financial profile.

However, these ranges can give you a rough benchmark:

Below 20%: Considered a strong ratio, with plenty of budget flexibility.
20% to 35%: Viewed as manageable, especially if your income is stable and you have a good repayment history.
36% to 43%: May be acceptable for some lenders and loan types, but borrowing options can become more limited.
Above 43%: Considered high, and some lenders may view this as a sign that taking on more debt could be difficult.

Even if your DTI is higher than you would like, it does not automatically mean you will be declined. Some lenders also consider factors like consistent income, cash reserves, and your overall payment history when making a decision.

Front-end vs back-end DTI

When applying for a mortgage, you may come across the terms “front-end” and “back-end” debt-to-income ratios. Both are affordability measures, but they focus on different parts of your budget.

Front-end DTI

Front-end DTI only considers housing costs relative to your income. This is sometimes called your housing ratio.

It typically includes your monthly mortgage payment and may also include property taxes, homeowners’ insurance, and HOA dues, if applicable.

Back-end DTI

Back-end DTI considers all monthly debt payments, including housing costs, relative to your income. This is the DTI figure most people mean when they talk about debt-to-income ratio.

It usually includes debts such as car loans, student loans, and personal loans, as well as minimum credit card payments.

In simple terms, front-end DTI focuses on how affordable your housing payment is, while back-end DTI looks at your overall debt picture.

How does debt-to-income ratio affect loan approval and rates?

Debt-to-income ratio helps lenders judge how affordable a new loan payment would be based on your existing debts.

If a large percentage of your income is going toward existing debt, a lender may think you’ll struggle to cover another payment, even if you have a good credit score.

Here’s how having a higher DTI could affect your loan application:

Approval: Some lenders have DTI limits, and if your ratio is above their set range, you may be declined or only approved for a smaller amount.
Loan amount: A lender may offer you a smaller loan to keep the monthly payment within what they believe you can manage.
Rates and terms: You may be offered better terms if you have a lower DTI, while having a higher DTI could lead to higher rates or shorter terms, depending on the lender and loan type.

Debt-to-income is only one factor lenders consider. They will also look at your income stability, credit history, and recent payment behavior.

However, improving your DTI can strengthen your application, especially if you are close to the lender’s affordability thresholds.

How to lower your debt-to-income ratio

To get your DTI as low as possible, you need to either increase your income, reduce your debt, or ideally do both. Here are some steps you can take to improve your debt-to-income ratio:

Pay down any credit card balances you have to reduce your minimum monthly payments.
Pay off smaller debts to remove a monthly payment entirely.
Refinance debt to lower your monthly payment, as long as it doesn’t increase the overall cost too much.
Avoid taking on new debt, as any new monthly payments will increase your DTI.
Increase your gross income where possible, such as by working extra hours or generating a steady side income.
Make changes that reduce your DTI and your budget, not just a lower monthly payment.

If you’re planning to apply for a loan, lowering your DTI even slightly can strengthen your application and may even improve the terms you’re offered.