Debt-to-Income Calculator

Your debt-to-income ratio tells lenders how much of your income goes toward debt payments each month. It’s a key factor in mortgage and loan approvals. Calculate yours below and see where you stand.

What Is Debt-to-Income Ratio?

Your debt-to-income ratio (DTI) compares how much you owe each month to how much you earn. It’s calculated by dividing your total monthly debt payments by your gross monthly income. Lenders use this ratio to evaluate whether you can manage monthly payments and repay borrowed money. While DTI doesn’t directly affect your credit score, it’s one of the most important factors lenders consider for mortgages, auto loans, and personal loans.

DTI Thresholds Lenders Use

For conventional mortgages, most lenders prefer a DTI of 36% or lower, though some will accept up to 43%. FHA loans may allow up to 50% in some cases. For the best interest rates and loan terms, aim for under 28%. Keep in mind that these are guidelines — individual lenders may have stricter or more lenient requirements, and your overall financial picture matters too.

How to Calculate Your Debt-to-Income Ratio by Hand

The formula is simple: add up your total monthly debt payments, divide by your gross monthly income, then multiply by 100. If you pay $450 on a car loan, $1,300 on a mortgage, and $250 across credit card minimums, that is $2,000 in monthly obligations. On a gross income of $6,000 a month, your DTI is 33%. The arithmetic is easy, but the inputs are where most people get it wrong, so it is worth being precise about both halves of the equation.

Use gross income, not take-home pay. Lenders work from your pre-tax figure because that is what appears on tax returns and pay stubs. Include salary, reliable bonuses, self-employment income, alimony, and documented rental income. Leave out anything you cannot prove on paper, because a lender will not count it either.

What Counts as Debt and What Does Not

Count every recurring payment that appears on your credit report: mortgage or rent, auto loans, student loans, personal loans, credit card minimum payments, and any court-ordered support. For credit cards, lenders use the minimum due rather than the full balance, which is why a $9,000 balance might only add $270 to the calculation.

Leave out expenses that are not debt obligations, even though they feel like bills. Utilities, phone plans, groceries, insurance premiums, streaming subscriptions, and childcare do not belong in a DTI calculation. This matters because including them can make your ratio look far worse than the one a lender will actually compute.

Front-End Versus Back-End DTI

Mortgage lenders often look at two ratios. The front-end ratio counts only housing costs against your income, while the back-end ratio counts all debt including housing. The old 28/36 guideline suggested keeping housing at or below 28% and total debt at or below 36%. Those numbers are still a useful benchmark even though modern underwriting is more flexible.

Under the Qualified Mortgage rules, 43% back-end DTI became the widely cited ceiling for conventional loans, and many lenders treat it as a soft limit. Some programs stretch further when you have strong compensating factors such as a large down payment, significant cash reserves, or a high credit score. FHA loans in particular can approve higher ratios than conventional loans.

DTI Limits by Loan Type

There is no single DTI cutoff, because each loan programme sets its own tolerance and individual lenders add stricter rules of their own on top. The figures below are the widely used benchmarks rather than hard rules, and they do move over time.

Loan type	Typical back-end DTI ceiling	Notes
Conventional (Qualified Mortgage)	43%	Automated underwriting can approve higher with strong compensating factors
FHA	43%	Can stretch further with reserves, a higher score or residual income
VA	No fixed cap	Uses a residual income test instead of a strict ratio
USDA	41%	Waivers possible with documented compensating factors
Auto loan	45% to 50%	Varies widely by lender and credit tier
Personal loan	40% to 50%	Some online lenders go higher at a higher rate
Student loan refinance	40% to 50%	Lender-specific, income stability weighs heavily

Compensating factors are what let a lender approve a ratio above the guideline. The ones that carry weight are significant cash reserves after closing, a large down payment, a credit score well above the minimum, a long history in the same job or industry, and a new housing payment close to what you already pay in rent.

Worked Example: Two Applicants, Identical Income

Both applicants earn $6,000 a month gross. Their incomes are the same, their debts are not, and only one of them clears the 43% threshold.

Monthly obligation	Applicant A	Applicant B
Housing payment	$1,500	$1,500
Car loan	$400	$650
Student loan	$0	$450
Credit card minimums	$150	$300
Total monthly debt	$2,050	$2,900
DTI on $6,000 gross	34%	48%

Which Debt to Clear First to Lower Your DTI

Here is where DTI behaves very differently from a credit score. DTI responds to the monthly payment, not the balance, so the cheapest debt to eliminate is not always the one that helps most. Using Applicant B’s figures on a $6,000 gross income:

Debt	Balance	Monthly payment	DTI reduction if cleared	Cost per point of DTI
Store card	$900	$45	0.75 points	$1,200
Credit card	$4,200	$130	2.17 points	$1,936
Car loan	$9,500	$400	6.67 points	$1,425
Student loan	$22,000	$250	4.17 points	$5,276

The last column is the one to act on. Paying off the car loan costs $9,500 and removes 6.67 points of DTI, while paying off the student loan costs $22,000 and removes only 4.17 points. If your goal is loan approval within a fixed budget, target the debts with the highest payment relative to balance and ignore the total size of the debt. Our debt avalanche planner can sequence the rest once you have cleared the highest-impact account.

How This Calculator Works

The tool divides your total monthly debt obligations by your gross monthly income and expresses the result as a percentage, which is the back-end ratio lenders use. It counts the payments that appear on a credit report: housing, auto, student and personal loans, credit card minimums, and court-ordered obligations such as child support or alimony.

It deliberately excludes utilities, phone plans, insurance premiums, groceries, childcare and subscriptions, because lenders do not count them and including them produces a ratio no underwriter would recognise. For credit cards it uses the minimum due rather than the full balance, which is how the figure is calculated in underwriting.

Common DTI Mistakes

Using net rather than gross income is the most common, and it makes your ratio look roughly 25% worse than the one a lender will calculate. Including living expenses that are not debt obligations has the same inflating effect. In the other direction, people often forget obligations they do not think of as debt, such as child support or a co-signed loan they are not actually paying, both of which underwriters will count.

The other frequent error is timing. Paying off a loan does not remove it from your DTI until the lender sees an updated credit report, so clear accounts at least 30 to 45 days before you apply and keep the payoff confirmation. Also resist opening new credit during an application, since a new monthly payment raises your ratio at exactly the wrong moment.

Frequently Asked Questions

Does DTI affect my credit score?

No, your DTI ratio is not factored into your credit score calculation. However, the debts that make up your DTI (particularly credit card balances) do affect your score through utilization. And lenders check DTI separately as part of the underwriting process. Credit scores look at credit utilization instead, which compares your balances to your credit limits rather than to your income.

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