Spending money to promote your business is one of the most straightforward deductions available to self-employed workers and business owners. Advertising and marketing costs, including digital ads, print materials, business cards, signage, and promotional giveaways, are deductible as ordinary and necessary business expenses. The key requirement is that the expense must be directly related to promoting your business rather than a personal expenditure. If you run ads that promote both a personal social media presence and your business, only the portion related to the business is deductible. There is no dollar cap on this deduction, so companies large and small can write off their full marketing spend.