Advertising and marketing costs are among the most straightforward business deductions. Anything you pay to get your name in front of potential customers counts: paid search and social ads, your website design and hosting, a portfolio site, business cards, flyers, signage, and promotional products with your brand on them.
Services you hire out are deductible too. Fees to a marketing agency, a freelance designer, an SEO consultant, or a copywriter to promote your business are advertising costs. If the person you paid is a non-corporate contractor and you paid them $600 or more, remember you may need to issue a 1099-NEC.
Sponsoring a local event or team, or paying an influencer to promote your product, generally counts as advertising when the purpose is to promote your business. Ordinary charitable giving is handled differently, so keep promotional sponsorships separate from donations.
Keep the receipts and invoices and file them under advertising. Because marketing is often recurring (monthly ad spend, an annual hosting bill), a quick categorized record ensures you capture the full year's total.

