@AmyC wrote:
You can claim the percentage used for business. For example, if your car is used 50% for business, then 50% of the interest would be deductible.
Reference: Business Use of Vehicles - TurboTax Tax Tips & Videos - Intuit
However, the purpose of the loan must be for the business. If you take out a loan for personal expenses, the interest is not a deductible business expense, even if it is secured by a business vehicle.
To be deductible, business expenses must be ordinary and necessary expenses of the business.
