Only one-fifth of expenses on cars not recorded in the fixed assets register can be at the company’s expense. It does not matter if the vehicle is owned or co-owned by the taxpayer. The rules for accounting for expenses on company cars have changed since January 1 this year. According to the director of the National Treasury Information, you cannot deduct the car expenses belonging to the entrepreneur if it is not part of the company’s assets. However, if the car is used in connection with the business carried out in accordance with art. 23 par. 1 point 46 of the PIT Act, its operating costs and insurance premiums are only 20% tax deductible.