18 crypto firms file brief challenging Illinois 0.2% digital-asset tax

Eighteen crypto firms and policy groups filed a joint brief on Nov 12, 2026 asking an Illinois court to block the state's Digital Asset Tax Act — a 0.2% transaction tax on digital asset activity signed into law by Governor JB Pritzker as part of the FY27 state budget. CoinDesk covered the filing on the same day.

The filers

The brief is led by four organizations and co-signed by 14 others:

• Lead signers: DeFi Education Fund, Paradigm, Uniswap, Andreessen Horowitz.
• Co-signers: Aave Labs, Aptos Labs, Aztec Labs, Chainlink Labs, Decentralization Research Center, Dromos Labs, Figment Inc., Hyperliquid Policy Center, Jito Labs, Multicoin Capital Management LLC, Orca Creative, Phantom Technologies, Solana Policy Institute, Stand With Crypto.

The underlying suit against Illinois was brought separately in late October by the Blockchain Association, the Crypto Council for Innovation and The Digital Chamber. Today's filing is an amicus/supporter brief rather than a party pleading.

The arguments

The brief presses three lines, per quoted passages:

• Discrimination against digital assets — "The Act singles out transactions involving blockchain technology for unfavorable tax treatment." The filers argue the tax applies to no comparable non-crypto transactions, which they frame as a constitutional problem under the Commerce Clause and state uniformity requirements.
• Fatal vagueness — "The Act fails to establish sufficiently clear boundaries between taxable digital asset business activity." The filers argue the Department of Revenue cannot tell developers from brokers from infrastructure providers under the statute's definitions.
• Impossible compliance — The Department would be "sweeping in developers, providers and other network participants" who have no customer accounts or records and so cannot collect or remit the 0.2% levy. This argument is aimed at non-custodial software developers in particular.

The brief also cites scale: it estimates 2.64 million Illinoisans hold digital assets, the fifth-highest state total in the US.

The tax

• Rate: 0.2% on digital asset transactions.
• Threshold: The CoinDesk-cited earlier framing of the statute applies the tax to firms with more than $100,000 in receipts.
• Revenue estimate: Up to $60 million per year for the state, per Illinois budget documents cited in reporting.
• Enacting vehicle: Signed by Gov Pritzker as part of the FY2027 Illinois state budget.
• Original effective date: Jan 1, 2027.
• Current effective date: July 1, 2027, after an earlier state-and-industry joint motion to delay — covered here on Oct 1.

What to watch

1. The court's schedule on the underlying suit: a ruling before July 1, 2027 is the operational question for every filer. No hearing date is public yet.
2. Whether the Illinois Department of Revenue issues revised draft rules in response to the vagueness arguments — the September 30 draft was the artifact the industry built this argument against.
3. Whether any other US state with a draft digital-asset transaction levy pauses or revises its own framework while the Illinois case runs.
4. The DOJ and banking-sector postures: a separate Decrypt framing described opposition to the Illinois tax as an unusual alignment of DOJ, banks and DeFi; the actual court filings that would substantiate any DOJ position are not yet public.

Context

Illinois is attempting to collect a per-transaction crypto tax at the point of trade rather than at the point of gain. The industry's legal strategy — attacking the statute's definitions and compliance impossibility before the enforcement date, rather than challenging revenue authority head-on — follows the template that prevailed against Maryland's digital advertising tax in federal court. This is the first real test of that playbook on a state digital-asset levy.