Owner-Operator Debt-to-Income Calculator

If this DTI percentage fits within lender guidelines, you likely have the cash flow to handle a new truck or trailer purchase; your next step is a soft-pull rate check to confirm your specific borrowing power. Keep in mind that this figure is an estimate—your actual approval depends on your credit profile, the age of the equipment, and your time in business.

What changes your rate / answer

• Total Business Debt: If you are still paying off older debt, your DTI will spike, limiting your room for new equipment. Understanding the nuances of financing heavy equipment in 2026 can help you restructure or consolidate these existing burdens before you apply.
• Revenue Consistency: Lenders weigh gross income based on your last 6-12 months of bank statements. If your income fluctuates wildly, they often take the lower end of your average.
• Existing Equipment Loans: If you are already carrying high-interest commercial auto loans for 1-ton trucks, the monthly payment on those assets significantly impacts your capacity to finance a new trailer. If you are struggling with heavy asset costs, look into specialized heavy equipment guidelines to see if you qualify for more favorable terms that lower your monthly overhead.
• Credit History: A lower credit score often necessitates a lower DTI, as lenders see higher risk in borrowers with existing debt and poor credit history.

How to use this

• Monthly Gross Income: Input the total revenue your business generates before taxes, fuel, insurance, and maintenance costs.
• Total Monthly Debt: Include everything you pay monthly: personal mortgage/rent, current credit card minimums, and existing equipment financing payments.
• Proposed New Loan Payment: Enter the estimated payment for the truck or trailer you are planning to buy to see how it shifts your total ratio.
• Interpreting the Result: A ratio under 35% is generally considered healthy. Once you hit 50% or higher, most traditional lenders will flag your application as high-risk, making it difficult to secure competitive rates.

Bottom line

Your DTI ratio is the primary indicator lenders use to determine if you can afford new growth. Use this calculator to see exactly where you stand before applying for your next commercial trailer financing package.