A deductible business expense is an ordinary and necessary cost incurred by a company to run its operations. These expenses, which are usually presented as deductions on taxes, help to reduce a business’s overall tax liability. Common examples of deductible business expenses include salaries, supplies, rent, loan interest, insurance premiums, travel expenses, utility costs, advertising and marketing fees, and depreciation on business equipment. Deductible business expenses can be both one-time purchases or ongoing costs depending on the situation. All businesses have different rules and regulations on what qualifies as an ordinary and necessary expense, so it pays to research before making a purchase. In the end, deductibles can make a huge difference in a business’s bottom line – while helping to sustain operations over the long-term.