Debt-to-income ratio: what it means

Resources · Debt basics · 5 min read Advanced

Key points

• Debt-to-income ratio (DTI) is your monthly debt payments divided by your monthly income.
• It shows how much of your pay is already committed to debt each month.
• Lenders often look at it, but how they work it out and use it varies.
• You can find your own in a few minutes with a calculator.

What debt-to-income ratio is

Your debt-to-income ratio is a simple comparison. Take the total you pay towards debts each month, divide it by your monthly income, and you get a percentage.

Lower means less of your income goes on debt. Higher means more of it is spoken for before you’ve bought a single grocery or paid a single bill.

You’ll mostly hear the term around home loan applications. But it’s a useful number for anyone carrying debt. Honestly, it’s one of the quickest reality checks there is.

How to work out yours

You need two figures.

1. Your monthly debt payments. Add up what you pay each month on everything you owe. That means a home loan or mortgage if you have one, plus car loans, personal loans and student loans. For credit cards, use the minimum payment. Buy now, pay later plans and any other repayment plans count too. If you haven’t got it all in one place yet, listing every debt you owe helps.

2. Your monthly income. Lenders often use gross income, which is what you earn before tax. Some use after-tax income instead. For your own tracking either is fine. Just pick one and stick with it.

Then:

DTI = monthly debt payments ÷ monthly income × 100

A worked example

Say your gross monthly income is $5,000, and your monthly debt payments look like this:

$1,500 ÷ $5,000 = 0.30, so your DTI is 30%.

Now watch how much the method changes the answer, using the very same numbers. Leave out the home loan and it’s $700 ÷ $5,000 = 14%, which is roughly how some lenders look at it when they treat housing separately. Use after-tax income of $4,000 instead and it climbs to $1,500 ÷ $4,000 = 37.5%. Clear the credit cards and it drops to $1,350 ÷ $5,000 = 27%.

Same person. Four different percentages. The same maths works in any currency.

Why lenders look at it

A lender wants to know if a new repayment would fit alongside what you’re already paying. DTI is a fast way to see that.

How they use it varies a lot, though. Different countries, lenders and loan types use different versions of the ratio and different limits. Some use a similar measure that compares your total debt, not your monthly payments, with your yearly income. If you’re applying for credit, the lender’s own information explains what they look at.

What a debt-to-income ratio doesn’t show

DTI is useful. It also leaves a lot out.

It ignores your living costs. Rent (if you don’t count it as debt), childcare, food and transport aren’t in there, yet they decide what you can actually afford.

It says nothing about interest rates either. Two people with the same DTI could be paying wildly different amounts in interest. And it hides total balances, so a small monthly payment on a big, long debt can look perfectly fine.

Savings don’t show up. A healthy buffer makes the same DTI feel a lot more manageable. And if your income jumps around from month to month, one month’s number may not tell you much at all.

So treat it as one number, not the whole story. Some people use DTI alongside a full budget for exactly this reason.

Ways DTI changes

There are only two parts to the ratio. So it only moves two ways.

Your debt payments go down. Clearing a debt wipes its payment off completely, and paying down a card can lower its minimum. Or your income goes up, spreading the same payments over a bigger number.

Taking on new debt pushes it the other way. Some people check what their DTI would become before applying for anything new. Good habit.

One catch. DTI measures payments, not progress. Paying extra on a fixed-payment loan usually doesn’t budge your DTI until the loan is gone, even though you’re saving interest the whole time.

How it fits with a debt plan

Tracking your DTI over time can be really encouraging. Every debt you clear knocks a payment off the total, and the percentage drops in a step you can actually see.

If your ratio shows your payments are eating more of your income than you can manage, free debt help is available, and it’s confidential.

Common questions

How do you calculate debt-to-income ratio?

Add up your monthly debt payments, divide by your monthly income, then multiply by 100. For example, $1,500 in payments on $5,000 of income is 30%.

Does debt-to-income ratio include rent?

Usually not, unless you choose to count it. Lenders treat housing costs and other debts differently, and their own information explains what they include.

What is a good debt-to-income ratio?

There’s no single number that applies everywhere. Countries, lenders and loan types all use different versions and limits. A lower percentage simply means less of your income is already committed to debt.

Try it

List your debts and payments, then find your Freedom Date to see when they could all be cleared. The budget calculator can show you where the rest of your income goes.

General information only, not financial advice. Your situation is your own.