The Maryland Attorney General is appealing the Maryland Tax Court’s decision last month that struck down the state’s digital advertising tax. The first-of-its-kind law continues to draw national attention as other statehouses consider what the legal battle means for their own digital ad tax proposals. I covered the Tax Court ruling and similar nationwide legislation in a post last month.
It’s unfortunate, though perhaps not surprising, that the state has chosen to continue spending public funds on this litigation. I’m hopeful that the new venue – the state trial court – will affirm the Tax Court’s decision. A ruling that upholds the tax not only would harm Maryland consumers and the state's economy, but it would encourage more digital ad taxes across the nation. This risks reshaping the Internet’s advertising-supported model for the worse.
Ads play a central role in the modern Internet and broader economy, as they make up a significant portion of Internet traffic. Targeted advertising involves a set of voluntary exchanges that support the modern Web: businesses pay for targeted ads to reach consumers, and people share information with advertising companies in return for accessing websites without charge.Taxes on digital advertising would mean fewer ads, as basic economics explains. In search for lost ad revenue, websites would likely create paywalls, turn to donations, or raise prices for their products, or combinations of these. All these costs would hit everyday working people hard, especially those with low incomes.
Many supporters of digital ad taxes have the picture backwards and instead see targeted advertising as a social ill. In Maryland, Senate President Bill Ferguson described basing the tax legislation on economist Paul Romer’s idea to curb targeted advertising by taxing it. Romer would instead like to see a subscription-driven Internet where website visitors pay to access content or donate to the website.
A general antipathy towards “big tech” started the push for digital ad taxes (which I discussed last month). As Maryland looked for ways to raise revenue amid massive education spending and budget challenges, legislators knew that taxes on companies like Meta and Google would likely be popular with the public. Similar tax legislation then began appearing in other statehouses trying to raise state revenue.
Fortunately, Maryland’s digital ad tax is on shaky grounds at best, a signal to other states that they may face similar challenges with their laws. In Maryland, the tax’s weak legal standing was clear from the start. Free State Foundation scholars predicted back in 2020 that the tax would not survive judicial scrutiny.
The Maryland Tax Court’s ruling last month determined that the tax violates the federal Internet Tax Freedom Act (ITFA) and the Constitution’s dormant Commerce Clause and Due Process Clause: under ITFA, the tax discriminates on digital advertising by exempting print and broadcast ad sales; it violates the dormant Commerce Clause by levying a local tax structure based on global revenue; and it violates the Fourteenth Amendment’s Due Process Clause by discriminating against out-of-state companies.
A reversal of the Maryland Tax Court ruling would begin to unwind the set of voluntary exchanges that support the modern Web. Taxes on digital advertising would make life more expensive for everyday consumers. I’m optimistic that the trial court will affirm the Tax Court’s decision and discourage other states from following the same path.






