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How Different Debts Affect Your DTI Ratio

Different types of debts are treated differently in mortgage DTI calculations based on agency guidelines. Revolving debts use the minimum payment, installment loans use the contractual payment (with a potential 10-month exclusion for conventional loans), student loans may use imputed payments, and co-signed debts may be excludable with documentation of the primary borrower's independent payment history.

Key Takeaways

  • Revolving debts (credit cards) are included at the minimum monthly payment shown on the credit report. When no minimum payment is reported on a revolving account, lenders impute a payment based on a percentage of the outstanding balance, typically 5% per GSE underwriting guidelines.
  • Installment debts with fewer than 10 remaining payments may be excluded from DTI for conventional loans under Fannie Mae guidelines. FHA includes all installment debts regardless of remaining term.
  • Student loans in deferment, forbearance, or income-driven repayment may have payments imputed for DTI purposes: Fannie Mae uses 1% of the outstanding balance, while FHA and Freddie Mac use 0.5% of the outstanding balance, unless a documented payment amount is reported on the credit report. if the credit report shows a $0 payment.
  • Co-signed debts are included in DTI unless the primary borrower documents 12 consecutive months of independent payment history.
  • Court-ordered child support and alimony payments are included at the court-ordered amount, not the actual amount paid.
  • Authorized user accounts are generally excluded from DTI because the borrower is not contractually liable for the debt.
  • Business debts on a personal credit report may be excluded if the borrower documents that the business has been making payments for at least 12 months.
  • Utilities, insurance premiums not part of the mortgage payment, and subscription services are not included in DTI calculations.

How It Works

How Lenders Identify Debts for DTI

The lender's primary source for identifying the borrower's debts is the tri-merge credit report, which compiles data from Equifax, Experian, and TransUnion. Every open account with a balance or active status is reviewed, and the monthly payment reported by the creditor is typically used in the DTI calculation. The lender also reviews the loan application (Uniform Residential Loan Application, Form 1003) for debts not appearing on the credit report, such as private loans, child support, and other court-ordered obligations.

The underwriter reconciles the credit report with the application. If the borrower disclosed a debt on the application that does not appear on the credit report, it is still included. If the credit report shows a debt the borrower did not disclose, the underwriter investigates the discrepancy. Undisclosed debts discovered during underwriting increase the back-end ratio and may trigger a revised AUS submission or manual recalculation.

Payment Amount Determination by Debt Type

For each debt, the lender determines the correct monthly payment to use in the DTI calculation. Revolving accounts use the minimum payment from the credit report. Installment accounts use the contractual monthly payment. Student loans follow program-specific rules for imputed payments when the reported payment is $0 or the loan is deferred. Court-ordered obligations use the amount specified in the court order. If any payment amount is missing, unclear, or inconsistent between the credit report and the borrower's documentation, the lender applies the more conservative figure or requests clarification from the creditor.

Lenders may request updated payoff or payment information directly from creditors when the credit report data appears outdated. A credit supplement allows the lender to obtain current balance and payment information without pulling a new credit report. This is particularly useful when a borrower has recently paid down a balance or when payment amounts have changed since the credit report was generated.

Applying Exclusion Rules

After identifying all debts and their payment amounts, the underwriter evaluates whether any debts qualify for exclusion. The 10-month installment exclusion rule, co-signer exclusion with documentation, and business debt exclusion each require specific evidence. The underwriter documents the basis for each exclusion in the loan file. If an AUS approval is contingent on certain debts being excluded, the underwriter must verify that the exclusion criteria are met before clearing the condition.

Exclusions can significantly change the DTI outcome. Excluding a $500 monthly auto loan payment with 7 remaining payments could reduce a borrower's back-end ratio from 47% to 40%, potentially making the difference between approval and denial. However, the exclusion must be properly documented, and the underwriter must confirm that the remaining payments do not materially affect the borrower's financial capacity.

Recalculation After Debt Payoff

If a borrower pays off a debt during the mortgage process to reduce DTI, the lender must obtain evidence of the payoff and update the calculations accordingly. This typically requires a zero-balance letter from the creditor or an updated credit supplement showing the account as paid and closed. The AUS may need to be rerun with the updated debt information to generate a revised approval. Simply providing a payment confirmation is not sufficient in most cases; the lender needs confirmation that the account is closed or the balance is zero and will remain so.

Related topics include dti ratio limits by loan type, front-end vs. back-end dti ratios explained, student loan payments and mortgage dti calculations, car payments and auto loans in dti calculations, child support, alimony, and dti for mortgages, and strategies for reducing dti before applying for a mortgage.

Key Factors

Factors relevant to How Different Debts Affect Your DTI Ratio
Factor Description Typical Range
Revolving Debt Minimum Payments Credit cards and other revolving accounts are counted in DTI using the minimum monthly payment shown on the credit report, not the full balance. Even if the borrower pays the balance in full each month, the minimum payment is used unless the account is paid off and closed before closing. Mortgage qualification uses the minimum payment reported on the credit report, which is typically 1% to 3% of the outstanding balance. When no minimum payment is reported for an open revolving account, conventional underwriting guidelines require using 5% of the balance as the assumed monthly obligation.; $0 balance = $0 in DTI
Installment Loan Remaining Term Auto loans, personal loans, and other installment debts with a fixed payment schedule are counted in DTI using the monthly payment amount. If the debt has fewer than 10 months of payments remaining, some loan programs allow it to be excluded from the DTI calculation. Full monthly payment included; may exclude if <10 payments remaining (program-dependent)
Student Loan Payment Status Student loan treatment in DTI varies significantly by loan program and repayment plan status. If the borrower is on an income-driven repayment (IDR) plan, the actual IDR payment may be used; if in deferment, lenders apply a calculated percentage of the outstanding balance. For deferred student loans or income-driven plans reporting a $0 monthly payment, Fannie Mae, Freddie Mac, and FHA each impute 0.5% of the outstanding balance as the monthly obligation for DTI purposes. VA uses the actual monthly payment amount regardless of repayment plan status
Co-Signer Liability When a borrower has co-signed on another person's loan, the full monthly payment counts in their DTI unless they can document that the primary borrower has made the last 12 consecutive payments independently. This documentation must show the primary borrower paid from their own account. Full payment counts unless 12 months of primary borrower payments documented

Examples

Scenario: Auto loan nearing payoff on a conventional application
Outcome: Under Fannie Mae guidelines, the auto loan may be excluded from DTI because it has fewer than 10 remaining payments. The exclusion reduces the back-end ratio from 41.0% to 33.4%, bringing it well within conventional limits. The underwriter documents the exclusion and confirms the remaining balance does not materially affect the borrower's financial capacity.

Scenario: Co-signed auto loan affecting DTI
Outcome: The borrower provides 14 consecutive months of the child's bank statements showing the auto loan payments drawn from the child's account with no contributions from the borrower. The lender accepts the documentation and excludes the $520 co-signed payment from DTI. The back-end ratio drops from 49% to 41%, within the acceptable range for AUS approval.

Scenario: Deferred student loans impacting FHA qualification
Outcome: FHA requires an imputed payment of 0.5% of the outstanding balance: $95,000 x 0.005 = $475 per month. Total monthly obligations become $1,550 + $280 + $475 = $2,305, yielding a back-end ratio of 39.7%. Without the student loan imputation, the ratio would be 31.6%. The imputed payment adds nearly 8 percentage points to the DTI. The borrower could provide documentation of an actual IDR payment amount to potentially reduce the imputed figure.

Common Mistakes to Avoid

  • Assuming minimum credit card payments reported on credit reports will match the borrower's actual minimum payment
  • Failing to document co-signer exclusion with 12 months of the primary borrower's bank statements
  • Applying the 10-month installment exclusion rule to FHA loans
  • Not providing income-driven repayment documentation to override imputed student loan payments
  • Opening new credit accounts during the mortgage process to consolidate debt
  • Forgetting to disclose private debts that do not appear on credit reports

Documents You May Need

  • Tri-merge credit report (pulled by lender at application)
  • Most recent statements for all revolving and installment accounts
  • Student loan servicer documentation showing current payment amount and repayment plan type
  • Divorce decree or separation agreement documenting child support or alimony obligations
  • 12 months of bank statements from the primary borrower on co-signed debts (for exclusion documentation)
  • Business financial statements (for self-employed borrowers seeking to exclude business debts from personal DTI)
  • Payoff letters or zero-balance confirmations for debts paid during the mortgage process

Frequently Asked Questions

Do credit card balances I pay in full every month still count in DTI?
Yes. DTI calculations use the minimum monthly payment reported on the credit report, regardless of whether the borrower pays the balance in full. If the statement balance triggers a minimum payment that is reported to the bureaus, that payment is included. If the balance is $0 at the time of reporting, the minimum payment is $0 and does not affect DTI.
Can I exclude my car payment from DTI if it's almost paid off?
For conventional loans (Fannie Mae/Freddie Mac), installment debts with fewer than 10 remaining payments may be excluded from DTI if the cumulative remaining payments do not materially affect the borrower's finances. This exclusion does not apply to FHA loans, which include all installment debts regardless of remaining term.
How are student loans in deferment treated in DTI?
When student loans show a $0 payment on the credit report due to deferment or forbearance, lenders impute a monthly payment. FHA requires lenders to use 0.5% of the outstanding student loan balance as the assumed monthly payment for DTI calculations when no payment is reported (HUD Handbook 4000.1). Fannie Mae's policy differs, requiring 1% of the outstanding balance under the same circumstances. The borrower can provide documentation from the loan servicer showing the actual monthly payment under an income-driven repayment plan to potentially reduce the imputed amount.
Is my car lease payment included in DTI?
Yes. Vehicle lease payments are included in the back-end DTI at the monthly lease payment amount for the remaining term of the lease. Leases are treated similarly to installment loans for DTI purposes.
Do 401(k) loans count in DTI calculations?
The treatment of 401(k) loans in DTI varies by lender and loan program. Some lenders and AUS systems exclude 401(k) loan repayments from DTI because the borrower is repaying themselves. Others include the payment as a recurrinUnder Fannie Mae guidelines, 401(k) loan repayments are counted in DTI when the repayment term extends beyond 10 months, while FHA and VA programs generally include 401(k) loan payments in DTI calculations regardless of remaining term
How does a debt management plan affect my DTI?
If a borrower is enrolled in a debt management plan (DMP) through a credit counseling agency, the monthly payment to the DMP is typically used in the DTI calculation rather than the individual minimum payments on the accounts included in the plan. The lender may require documentation from the credit counseling agency confirming the paymenMajor mortgage programs, including FHA, do not penalize DMP enrollment as a standalone negative factor, though lender-specific overlays may vary. FHA guidelines permit borrowers currently enrolled in a DMP provided they demonstrate at least 12 months of satisfactory repayment
Are medical bills in collections included in DTI?
Medical collections typically do not have a required monthly payment and therefore are not included in the monthly DTI calculation as an ongoing obligation. However, Under FHA guidelines (HUD Handbook 4000.1), when aggregate non-medical collection account balances equal or exceed $2,000, the borrower must either pay off the accounts or the lender must include 5% of the outstanding balance as a recurring monthly debt obligation in the DTI calculation. in DTI. Medical collections are generally excluded from these FHA aggregate thresholds.
If I pay off a debt during the mortgage process, how does it affect DTI?
Paying off a debt during the process can reduce DTI, but the lender must verify the payoff with a zero-balance letter or updated credit supplement. The AUS may need to be rerun to produce an updated approval. Additionally, the source of funds used for the payoff must be documented, and the payoff amount reduces available reserves, which the underwriter also evaluates.
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