Debt‑to‑Income Ratio Calculator — Auto Repair Shop Owners

If the DTI percentage shown is at or below the typical 45% ceiling, you’re in a strong position to move forward — the next step is a soft‑pull rate check that won’t affect your credit score. The exact rate you qualify for still depends on your credit profile, loan term and any collateral you can provide.

What changes your rate / answer

• Credit score – Higher scores (740 FICO +) unlock the lowest equipment‑financing APRs (8‑10%); scores under 580 may be priced at the top of the 25% range.
• Loan term – Longer terms spread payments, lowering the DTI but increasing total interest paid.
• Collateral – Securing the loan with shop equipment or a vehicle can reduce the APR by 1‑2 percentage points.
• Monthly revenue – Raising gross sales improves the denominator of the DTI calculation.
• Existing debt load – Paying down other loans or leases reduces the numerator and can pull your DTI under the 45% benchmark.

How to use this

• Enter the desired loan amount, the APR you were quoted (or use the default 12.5%), and the repayment term in months.
• Provide your shop’s average monthly gross revenue and the sum of monthly debt payments you already make (existing loans, leases, credit lines).
• The calculator returns a DTI percentage and highlights whether it falls under the 45% threshold most lenders use.
• If the number is too high, experiment by trimming the loan amount, extending the term, or boosting revenue before you start the soft‑pull pre‑qualification.

Bottom line

A DTI at or below 45% usually clears the first hurdle for a mechanic loan, line of credit, or equipment lease. Adjust the inputs to see how small changes affect your eligibility and then jump straight to a soft‑pull rate check.

When you’re ready, begin the pre‑qualification from the home page or continue to the full application via the apply flow. For a real‑world example of how shops with modest credit still secure rates in the 8‑10% range, see the Arizona collision‑repair financing case study.

Auto repair owners in Santa Ana have used similar calculations to compare equipment loans, working‑capital lines and SBA 7(a) options, choosing the product that fits their numbers best. Learn how they balanced revenue and debt in the Santa Ana financing guide.