DOJ, SIFMA and DeFi Coalition Attack Illinois Digital Asset Tax in Court

The US Justice Department, Wall Street's largest trade groups and a DeFi coalition have all filed court challenges to Illinois' planned digital asset tax, which the governor's budget office projects will raise $60 million in fiscal year 2027.

The legal assault runs on three tracks. The Digital Chamber sued Illinois Attorney General Kwame Raoul and state revenue official David Harris in July. The Blockchain Association and the Crypto Council for Innovation followed with a separate suit in August. The measure was originally set to take effect on Jan. 1, 2027, but lawmakers pushed the start date to July 1, 2027 to buy time for the litigation.

What did SIFMA and the Chamber of Commerce argue?

In a Nov. 6 court filing, SIFMA and the US Chamber of Commerce warned the tax would reach banks, broker-dealers, custodians and asset managers across the country, exposing them to significant compliance costs. They also flagged the burden on retail customers.

"This means that a customer who loses money owes the same tax as a customer who earns a profit," the filing said. "And a customer who moves the same asset between two accounts faces tax (potentially on both ends) without a sale, a gain, or a change of beneficial ownership."

The groups laid out the operational problem bluntly. Firms would have to build systems to identify Illinois customers, value digital assets and determine which transactions are taxable — while facing potential criminal penalties if they get it wrong.

They also argued the levy discriminates against digital asset services because comparable transactions in traditional assets go untaxed, a structure they say violates federal internet tax protections and constitutional requirements covering interstate commerce and uniform taxation.

Why is the Justice Department involved?

The DOJ filed its own challenge on Nov. 6, arguing Illinois' tax undermines federal policy promoting cryptocurrency innovation and US leadership in the sector. The filing cited the creation of a Strategic Bitcoin Reserve and the GENIUS Act, the federal law that established rules for stablecoins. Less favorable tax treatment for digital assets, the DOJ argued, could conflict with those policies.

The federal government weighing in against a state tax measure signals a broader jurisdictional fight over who sets the rules for digital assets — Washington or the states.

Who would have to collect the tax?

The DeFi coalition raised a different concern in a Nov. 11 filing: who bears collection liability. The group argued Illinois' proposed rules could impose obligations on software developers and other blockchain participants who lack customer information, have no control over user funds and possess no practical ability to collect taxes.

That argument goes to the core of decentralized finance. If protocol developers count as tax collectors, the liability could extend to parties who never touch a customer relationship or a dollar of user funds.

What's the political backdrop?

Illinois House Speaker Emanuel "Chris" Welch promoted the measure as part of a broader affordability agenda aimed at "closing corporate loopholes and making big tech companies and crypto billionaires pay their fair share," the Chicago Tribune reported in July.

Lawmakers who advanced the legislation and the governor's office did not respond to requests for comment before publication.

The litigation now runs against a fixed clock. With the tax set to take effect July 1, 2027, the courts will likely need to resolve the federal and constitutional challenges before Illinois can collect a dollar.