Yes, if the vehicle is exclusively used for business, car wash expenses may be fully deductible. If the vehicle is partially used for personal reasons, only the business-use portion is deductible.Yes, if the vehicle is exclusively used for business, car wash expenses may be fully deductible. If the vehicle is partially used for personal reasons, only the business-use portion is deductible. It’s important to keep detailed records of your mileage and the percentage of use for business versus personal purposes. Additionally, retaining receipts for all car wash expenses can help substantiate your claims during tax season. Consult with a tax professional to ensure you’re maximizing your deductions and complying with IRS guidelines.