States Are Quietly Starting to Tax Advertising Sales

A growing number of U.S. states are now taxing the sale of advertising, according to the Institute on Taxation and Economic Policy (ITEP). That's a policy shift with direct budget implications for anyone buying media, running paid social, or managing ad accounts across state lines.

The trend isn't hypothetical. State legislatures have been expanding sales tax bases to cover services — and advertising sits squarely in that path. ITEP's reporting flags the growth without specifying every state, which matters: practitioners should verify rules in each market where they buy, not assume a single national standard.

What does this change for marketers?

If a state taxes ad sales, the cost of every campaign bought or placed in that jurisdiction potentially rises by the tax rate. Agencies face the messier question of who remits — the platform, the agency, or the advertiser. Digital ad buys, which cross borders by default, are where this gets complicated fast.

A caveat, because ITEP's piece itself warrants one: the institute's analysis is advocacy-adjacent — ITEP argues broadly for progressive taxation. Its factual claims about which states tax ads deserve a check against each state's revenue department before you rework budgets. The source also doesn't specify rates or effective dates, so treat rollout scope as state-by-state unknowns.

How should practitioners respond?

• Audit where your ad spend lands geographically, not just where your account is based.
• Ask platforms and publishers whether tax is collected at their level or passed through.
• Build a buffer into 2025 media plans for jurisdictions considering or enforcing ad taxes.

What's the forward view?

State-level ad taxation has historically triggered legal challenges and industry pushback, and any expansion will likely draw the same. Watch for court fights and legislative sessions this year — they'll determine whether this stays a handful of states or becomes the default.