Tax business expenses refer to the costs associated with running a business that can be deducted from taxable business income. These expenses include administration fees, salaries and wages, advertising, bank charges, office supplies, travel expenses, insurance premiums, legal fees, utilities, rent, repairs and maintenance, and depreciation of assets. Business owners should keep accurate records of all their expenses to ensure they are properly accounted for come tax season. Knowing which costs are eligible to be claimed will help businesses pay lower taxes and maximize their profits.