Does Debt-to-Income Ratio Include Your Mortgage?

Yes. Your debt-to-income ratio does include your mortgage, and for most borrowers the mortgage payment is the single largest number in the calculation. Lenders divide your total monthly debt payments by your gross monthly income, and whether you already own or are applying to buy, the housing payment sits on the debt side of that equation.

How it gets counted depends on which version of the ratio a lender is looking at, and on what “the mortgage payment” actually includes.

Where the Mortgage Fits: Front-End vs. Back-End

Lenders use two DTI ratios, and your mortgage appears in both.

The front-end ratio, sometimes called the housing ratio, is just your monthly housing cost divided by your gross monthly income. Nothing else goes in. If you’re buying, the lender uses the projected payment on the new loan; if you’re refinancing, they use your current payment. Conventional guidelines generally target a front-end ratio below 28 percent, and FHA allows up to 31 percent before compensating factors are required.¹

The back-end ratio is the one that drives most approval decisions. It takes that same mortgage payment and adds every other recurring monthly obligation — student loans, auto loans, credit card minimums, personal loans, child support, alimony — then divides the total by gross monthly income.² This is the ratio that shows how much income is left after you’ve paid everyone you owe.

What Counts as the “Mortgage” in the Calculation

Lenders don’t just use principal and interest. The mortgage figure in your DTI is PITI — principal, interest, taxes, and insurance — plus two more charges when they apply.³

Principal and interest: the core loan repayment.
Property taxes: your annual tax bill divided by twelve, usually escrowed.
Homeowners insurance: your annual premium divided by twelve, also commonly escrowed.
Private mortgage insurance (PMI): required on conventional loans when your down payment is under 20 percent. Annual PMI costs generally range from about 0.2 percent to over 2 percent of the loan amount, depending on credit and down payment.
HOA and condo fees: monthly or quarterly dues from a homeowners association, condominium, or cooperative.

Under the Ability-to-Repay rule in Regulation Z, lenders must verify all of these costs before approving you, not just the loan payment itself.⁴ If you’re running your own DTI numbers and leaving out property taxes or PMI, your estimate will come out lower than what the lender will see.

If You Already Own a Home

Your existing mortgage counts as a debt whenever you apply for new credit — a car loan, a second mortgage, or any other financing. It goes into the back-end ratio the same way any other obligation does.

There’s one exception. If you’re selling your current home and using the proceeds to buy a new one, lenders drop the old mortgage from the calculation because it will be paid off at closing. In every other situation, the current housing payment stays in.

Debts That Count Alongside the Mortgage

Federal underwriting standards list six categories of recurring obligations in the back-end ratio:²

Monthly housing expense — the full PITI figure described above, plus mortgage insurance and HOA fees.
Installment loans with more than ten payments remaining, such as auto and personal loans.
Revolving account minimums, including credit cards, regardless of balance.
Student loans. For borrowers on an income-driven repayment plan, Fannie Mae uses the actual monthly payment shown on your credit report.⁵
Court-ordered child support and alimony, unless fewer than ten payments remain. Alimony can alternatively be subtracted from income rather than added to debt.
Other continuing obligations such as garnishments or co-signed loans you are responsible for.

What Doesn’t Count

Several large monthly bills are deliberately excluded from DTI:² income and payroll taxes, 401(k) contributions, utilities, cell phone and internet, groceries and transportation, health and auto insurance premiums, and child care. Lenders assume you’ll cover these from the income that’s left after your debt payments, so your DTI can look healthier than your actual budget feels.

DTI Limits by Loan Program

Each mortgage program sets its own ceiling, and each allows exceptions for borrowers with strong compensating factors such as cash reserves or a high credit score.

Conventional Loans

Fannie Mae caps the back-end DTI at 36 percent for manually underwritten loans, or up to 45 percent if the borrower meets specific credit and reserve requirements. Loans run through Fannie Mae’s automated underwriting system (Desktop Underwriter) can be approved with a back-end DTI as high as 50 percent.⁶ The often-quoted 43 percent conventional ceiling is no longer a hard limit.

FHA Loans

FHA sets the front-end ratio at 31 percent and the back-end ratio at 43 percent, with higher ratios possible when compensating factors are present.¹

VA Loans

The VA doesn’t impose a hard DTI cap. It uses 41 percent as a benchmark, and applications above that get closer scrutiny.⁷ Residual income — the cash left each month after major expenses — matters more. If your DTI exceeds 41 percent, you generally need residual income at least 20 percent above the VA’s minimum for your region and family size.

USDA Loans

USDA rural housing loans use a 29 percent front-end and 41 percent back-end ratio as their standard limits.⁸

If the Mortgage Pushes Your DTI Too High

Because the mortgage is usually the biggest single piece of DTI, borrowers who come in over the limit for their target program have two ways to move the number: shrink the debt side or grow the income side.

Pay off a fixed monthly payment. Eliminating a $400 car payment removes that line entirely. That generally helps more than paying down a credit card balance with a low minimum.
Don’t open new credit before applying. Financing a car or furniture right before a mortgage application adds a payment to your ratio at the worst possible time.
Increase documented gross income. A raise, a second job, or freelance income increases the denominator. Bonus and commission income generally need at least a 12-month track record before lenders will count them.
Lower the purchase price. A smaller loan means a smaller PITI, which pulls down both the front-end ratio and the housing portion of the back-end.
Choose a longer term. A 30-year loan has a smaller monthly payment than a 15-year loan on the same balance, which lowers DTI even though total interest paid is higher.

A few percentage points can be the difference between an approval and a denial, especially near the 50 percent automated-underwriting ceiling or the 36 to 45 percent manual-underwriting band on a conventional loan.⁶

1
U.S. Department of Housing and Urban Development. Section F – Borrower Qualifying Ratios Overview
2
Consumer Financial Protection Bureau. Appendix Q to Part 1026 – Standards for Determining Monthly Debt
3
Consumer Financial Protection Bureau. What Is PITI?
4
eCFR. 12 CFR 1026.43 – Minimum Standards for Transactions Secured by a Dwelling
5
Fannie Mae. FAQ – Top Trending Selling FAQs
6
Fannie Mae. Debt-to-Income Ratios
7
U.S. Department of Veterans Affairs. Debt-to-Income Ratio – Does It Make Any Difference to VA Loans
8
U.S. Department of Agriculture. Ratio Analysis