What is Maryland’s digital advertising tax? 

In 2021, Maryland broke new ground by becoming the first state in the country to impose a tax on digital advertising revenue. Unlike traditional sales tax, this is a brand-new gross-receipts tax that applies to companies with more than $100 million in global revenue. The tax is calculated on the portion of digital advertising revenue attributable to Maryland users. In effect, it marks a historic departure from sales-based taxation and represents a direct attempt to capture the value created in the digital economy.

How the tax has changed since its launch 

From its inception, the tax has faced major legal challenges. Companies like Meta, Apple, and Google have argued that digital advertising is simply another form of traditional advertising, and the tax is discriminatory under the Internet Tax Freedom Act, which prohibits states from imposing taxes that specifically discriminate against e-commerce. Maryland counters that digital advertising is fundamentally different and offers new capabilities and impacts that justify a separate tax treatment. 

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The debate has moved into the state’s tax court, where multiple cases have been consolidated. Hearings were held in July 2025, with court decisions expected in the fall of 2025 to clarify whether Maryland’s approach can withstand federal scrutiny. Meanwhile, Maryland has already begun collecting revenue: roughly $93 million in 2022 and $82.5 million in 2023, much of it earmarked for education.

Impact on the broader tax landscape 

The implications of this tax go far beyond Maryland. Traditional advertising has typically been untaxable under sales tax rules, creating gaps as more of the economy shifts online. Maryland’s approach gives states a model for closing those gaps. If the courts uphold the law, other states are expected to move quickly. Legislatures in New York, Rhode Island, California, and Louisiana are already monitoring the outcome and drafting similar proposals. This isn’t just about digital ads—it could open the door to new gross-receipts-style taxes on platforms, data, and digital services more broadly.

Compliance with Maryland’s digital ad tax is not straightforward. The law includes complex apportionment rules and vague sourcing standards, making accurate reporting difficult. Companies also face the risk of retroactive liability if earlier filings are challenged. These issues illustrate the larger challenge of adapting to a tax environment that is evolving faster than many legacy systems and processes can handle.

The bottom line 

Even if Maryland’s specific law changes, the trend it represents is undeniable. States are increasingly looking beyond sales tax to find new ways of taxing digital activity. For finance and tax leaders, this means investing in systems that can handle new and unfamiliar tax types, monitor exposure across jurisdictions in real time, and adapt as legislation shifts. Being proactive is essential, because once additional states adopt similar rules, compliance will only grow more complex.

Maryland’s digital advertising tax is more than just a state experiment. It represents a new chapter in how governments approach taxation in the digital economy. The outcome of ongoing litigation will determine whether this model spreads nationwide, but companies should already be preparing for a more complex and fast-moving tax landscape.

Anrok positions you for success in light of changes like these. We’re a platform built for emerging tax types beyond traditional sales tax, and we provide expert guidance as the digital taxation landscape rapidly evolves. Book a demo here.

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