Utilities are not included in your debt-to-income ratio. Electricity, gas, water, trash, and internet are service charges for what you’ve already used, not borrowed money you’re repaying, so lenders leave them out of the DTI formula entirely. The only time a utility bill enters the picture is if it goes unpaid long enough to land in collections and appear on your credit report.
What Lenders Actually Count
DTI compares your recurring monthly debt payments to your gross monthly income. Under Fannie Mae’s guidelines, the debts that go into the numerator are the ones tied to a binding repayment agreement a lender can verify through your credit report or a court document:
- Your housing payment — mortgage principal and interest, property taxes, homeowners insurance, mortgage insurance, and HOA dues
- Credit card minimum payments
- Auto loans, student loans, personal loans, and other installment debt with more than ten months remaining
- Mortgages on other properties and home equity lines of credit
- Alimony, child support, or separate maintenance ordered by a court and continuing more than ten months
- Car leases and similar ongoing lease obligations1Fannie Mae. General Information on Liabilities
Everything else you pay each month is treated as a living expense, not a debt. Fannie Mae specifically excludes federal, state, and local income taxes, Social Security contributions, retirement plan contributions (including 401(k) loan repayments), commuting costs, and union dues.1Fannie Mae. General Information on Liabilities Utilities sit in that same bucket. This is true whether the lender is looking at your front-end ratio (housing costs only) or your back-end ratio (housing plus every other qualifying debt), which is the number most underwriters focus on.2Fannie Mae. DU Job Aids: DTI Ratio Calculation Questions
Why Utilities Sit Outside the Formula
Two things separate a utility bill from a debt. First, no one lent you money. There is no principal, no loan term, no interest accruing on borrowed funds. You used a service and the provider is charging you for it. Second, utility companies generally don’t report your payment history to Equifax, Experian, or TransUnion, so the payments don’t appear in the data lenders review during underwriting. The amount also fluctuates month to month with usage, which further disqualifies it from a formula built around fixed or minimum payments.
When an Unpaid Utility Bill Can Still Hurt You
On-time utility payments are invisible to your mortgage lender. Severely delinquent ones are not. If a utility provider hands your unpaid balance to a third-party collection agency, that agency can report the debt to the credit bureaus, and it will show up on your credit report as a collection.
From there, the impact depends on the loan program. Some underwriting guidelines require you to pay off collection accounts or set up a repayment plan before closing. Even when payoff isn’t mandatory, the collection entry drags down your credit score and raises questions about your bill-paying reliability. The Fair Credit Reporting Act governs how long that information stays on your file and how it can be reported.3Office of the Law Revision Counsel. 15 USC 1681 – Congressional Findings and Statement of Purpose
So the practical rule: paying utilities on time keeps them out of your mortgage file. Letting them slide long enough to reach collections pulls them in through a different door.
Do Utility-Payment Credit Programs Change Your DTI?
No. Programs like Experian Boost let you voluntarily add on-time utility and phone payments to your Experian credit report. Users who saw a score increase gained an average of 13 points on their FICO Score 8, and only on-time payments count, so late payments through Boost won’t hurt you.4Experian. How Utility Bills Could Boost Your Credit Score
What Boost changes is your credit score, not your DTI. Your utility payments still aren’t treated as debt obligations in the ratio, and some mortgage lenders will ask you to remove Boost entries from your file during underwriting so they can evaluate your traditional credit alone. A higher score can help you qualify for better rates or clear a minimum-score threshold, but the debt-to-income math is unaffected.
Calculating Your DTI Without Utilities
Add up your qualifying monthly debt payments, divide by your gross monthly income, and multiply by 100. Say your mortgage (including taxes and insurance) is $1,400, your car loan is $350, and your credit card minimums add up to $150. That’s $1,900 in monthly debt. On a $5,500 gross monthly income, your back-end DTI is about 34.5 percent. Your front-end ratio, which counts only the $1,400 housing payment, is about 25.5 percent. Your monthly electric, water, gas, internet, and trash bills don’t enter either calculation.
DTI Ceilings by Loan Type
Because utilities aren’t counted, the ceilings below apply only to the qualifying debts listed earlier.
Conventional Loans
For loans sold to Fannie Mae, the maximum back-end DTI is 36 percent for manually underwritten loans, rising to 45 percent for borrowers who meet higher credit score and reserve requirements. Loans run through Fannie Mae’s automated Desktop Underwriter can go up to 50 percent.5Fannie Mae. Debt-to-Income Ratios
FHA Loans
FHA loans generally cap the front-end ratio at 31 percent and the back-end ratio at 43 percent. Borrowers with compensating factors, such as strong credit scores, significant reserves, or a small increase in housing payment, may qualify with a back-end DTI as high as 50 percent.
VA Loans
The Department of Veterans Affairs sets no hard DTI cap. It suggests a 41 percent back-end guideline, but borrowers above that threshold can still qualify by showing adequate residual income — the money left over each month after debts and essential living expenses are paid. That residual analysis is unique to VA loans.
Qualified Mortgage Standards
Federal regulations under the Truth in Lending Act define a “qualified mortgage” category that gives lenders and borrowers certain legal protections. Before October 2022, a qualified mortgage couldn’t exceed a 43 percent DTI. The Consumer Financial Protection Bureau replaced that cap with a price-based standard tied to the loan’s APR relative to the average prime offer rate.6Federal Register. Qualified Mortgage Definition Under the Truth in Lending Act Regulation Z General QM Loan Definition Lenders must still consider your DTI or residual income during underwriting, but no specific percentage automatically disqualifies a loan.7eCFR. 12 CFR 1026.43 – Minimum Standards for Transactions Secured by a Dwelling Utilities remain outside the calculation across all of these programs.