BHPH Debt-to-Income (DTI) Underwriting Calculator

If your calculated DTI ratio falls under your dealership’s established cap, proceed to verify the applicant's employment and residency; if it exceeds your threshold, you need to either secure a larger down payment or restructure the terms of the deal. Keep in mind that while this tool provides a clear mathematical baseline for bhph dealer financing decisions, the actual approval depends on the borrower's specific credit profile and the stability of their income source.

What changes your rate and underwriting outcome

While income and existing debt are the primary drivers of this metric, several factors can shift your underwriting outcome in 2026. Understanding these levers helps you make more informed decisions when reviewing applications:

• Collateral Equity: A higher down payment reduces the Loan-to-Value (LTV) ratio, which can sometimes allow for a slightly higher DTI exception if the borrower has significant "skin in the game."
• Credit Tier: Borrowers with a thin file or a recent repossession history may require a stricter DTI cap compared to those with a long, consistent history of repaying in-house auto financing.
• Loan Term: Stretching the term may lower the monthly payment, but remember that longer terms increase the risk of negative equity, making the deal harder to collect on if the vehicle breaks down or depreciates faster than the balance pays down.
• Employment Stability: Consistent, verifiable income allows you to rely more heavily on the gross income figures you input. Gig work or seasonal employment may require a more conservative calculation to avoid future delinquency.

How to use this tool

• Monthly Gross Income: Enter the verifiable, pre-tax income for the applicant. Use pay stubs or W-2s—never rely on verbal estimates.
• Existing Monthly Debt: Include all revolving debt, rent or mortgage payments, and other active loans. Excluding existing debt leads to an artificially low DTI and dangerous lending decisions.
• Target Loan Payment: Input the proposed payment amount, ensuring you include taxes, title, and fees.
• Interpretation: If the resulting percentage exceeds your dealership's internal risk-management threshold, the loan is statistically more likely to default. Most successful programs target a DTI under 45% to ensure the borrower can realistically cover the payment alongside their cost of living.

Bottom line

Proper DTI underwriting is the single most effective tool for preventing portfolio delinquency. Keeping your DTI ratios disciplined in 2026 protects your cash flow and stabilizes your overall subprime auto loan strategies.