1. Industry coalition files brief against the Illinois crypto tax
Eighteen digital asset companies and advocacy groups told a court on Thursday, November 12, 2026, that the Illinois crypto tax cannot be enforced as written. Their brief argues the planned 0.2% levy on crypto activity is too vague, discriminates against digital assets and imposes duties that many targeted parties have no practical way to perform.
The filing adds weight to an existing legal challenge aimed at stopping the tax before it is collected. The levy is currently on hold while the litigation proceeds, and the state has already agreed to push back its start date by six months from the original January 1 launch.
Among the signatories are Aave Labs, Chainlink Labs, the investment firm Paradigm, wallet developer Phantom Technologies, the advocacy group Stand With Crypto and the DeFi Education Fund. Their participation reflects how broad the resistance to the measure has become since it first surfaced earlier this year, with the opposition now also including names such as a16z and Uniswap.
2. What is the Illinois crypto tax?
The Illinois crypto tax is a planned 0.2% charge on cryptocurrency activity involving businesses with more than $100,000 in receipts. Lawmakers placed it in the state budget in June, surprising an industry that had not anticipated a transaction-style levy aimed specifically at digital assets.
The measure was presented as a way to raise revenue, with estimates suggesting it could bring in as much as $60 million for the state budget. The proposal, which reaches the holding and transferring of digital assets, was originally scheduled to apply from January 1. In late September, Illinois agreed to delay that start date by six months, and the tax is now paused pending the outcome of the court case.
For readers less familiar with how such charges work, a levy of 0.2% means two dollars for every $1,000 of qualifying activity. That rate may look small next to income or capital gains taxes, but crypto markets are built on frequent movement of assets between wallets, exchanges and protocols. A charge that attaches to activity rather than to profit can add up quickly for participants who transact often, and it raises immediate questions about who is responsible for calculating, collecting and remitting the money.
Those questions sit at the heart of the industry's latest filing. The coalition does not simply object to paying more; it argues that the law, as drafted, does not tell anyone clearly who owes what.
3. Why the coalition says the definitions fall short
Vague terminology is the first target of the brief. The signers argue that the statute fails to explain with any precision who qualifies as a crypto broker under the law, or which kinds of activity actually trigger the tax. In particular, they say the phrase "digital asset business activity" is difficult to pin down when applied to the way modern blockchain systems operate.
According to the coalition, the drafters did not account for the complexity of crypto networks. In traditional finance, the roles of customer, intermediary and asset holder are usually well defined: a broker holds accounts, knows its clients and moves funds on their behalf. Blockchain networks often split those functions among many different parties, some of whom never touch user funds at all and may have no relationship with the people using their tools.
When a law borrows concepts from conventional finance without adapting them, the brief contends, it leaves participants guessing about whether they fall inside or outside its scope. The signers describe the result as too vague to stand up legally, and they also characterize the tax as discriminatory toward digital assets because it singles out crypto activity for treatment that other forms of commerce do not face.
Vagueness is a familiar line of attack in American courts. A law generally needs to give people fair notice of what conduct it covers so they can comply, and it needs to give enforcement officials standards that prevent arbitrary application. By framing the Illinois statute in those terms, the coalition is asking the court to treat the drafting problems as more than a technical inconvenience.
4. How would the Illinois Department of Revenue enforce it?
Enforcement is where the brief says the law breaks down most clearly. As the coalition reads it, the tax would allow the Illinois Department of Revenue to reach software developers, service providers and other participants in blockchain networks, not just companies that hold customer money.
Many of those parties, the brief argues, cannot collect a tax from customers they do not have. They cannot redirect payments out of assets they do not control. And in many cases they have no reliable way to know where a given transaction took place, which matters for a state tax that depends on activity being connected to Illinois.
This location problem is a distinctive feature of public blockchains. Transactions are broadcast to a global network and recorded by computers that may be spread across many countries. A developer who published code, or a service provider running infrastructure, may see only cryptographic addresses rather than names or home states. Asking such a party to determine whether a particular transfer was an Illinois transaction, the coalition suggests, demands information it simply does not possess.
The result, in the signers' view, is a set of obligations that look straightforward on paper but cannot be carried out in practice by a large portion of the people the law appears to cover.
5. Software developers and the custody question
Particular concern in the filing centers on people who write code. The industry argues that the tax appears broad enough to cover developers whose software other people use to carry out transactions for themselves. These developers, the brief says, have no customers in the traditional sense and no access to the assets that users move.
The coalition draws a sharp contrast with conventional brokers. A traditional broker executes transfers for other people, maintains accounts in their names and keeps records of who they are. That structure gives the broker both the information and the control needed to withhold or collect a tax. Non-custodial developers, by comparison, keep no accounts and no customer records. Their software runs, but the users hold their own keys and initiate their own transactions.
Under the statute as written, the brief warns, developers and service providers lacking custody, accounts or location data could still find themselves facing obligations they have no realistic means of meeting. That prospect is especially relevant to several of the signers. Wallet makers such as Phantom and protocol developers such as Aave Labs and Chainlink Labs build tools that many people use directly, without handing over control of their funds.
The distinction between custodial and non-custodial activity has been a recurring theme in crypto policy debates across the United States. Custodial firms, such as centralized exchanges, look and function much like traditional financial intermediaries. Non-custodial software resembles a published tool more than a financial institution. Industry groups have long argued that rules designed for the first category should not be stretched to cover the second, and the Illinois case brings that argument to the state level.
6. What an amicus brief does in this case
Thursday's filing is an amicus brief, sometimes called a friend-of-the-court brief. This type of submission allows parties who are not directly suing, but who would be affected by a ruling, to present their arguments and expertise to the judge.
Amicus briefs do not by themselves decide a case. Their value lies in showing the court how a law would play out beyond the immediate parties, and in supplying technical detail that might otherwise be missing from the record. In a dispute over how a tax applies to blockchain software, the signers are effectively offering the court a guide to how these systems work and why, in their view, the statute does not fit them.
The size of the coalition also sends a message. Eighteen businesses and organizations signing a single brief signals that the concerns are shared across different corners of the sector, from lending protocols and data networks to wallets, investors and grassroots advocacy groups.
7. Pritzker's support and the political backdrop
Illinois Governor JB Pritzker has backed the tax. Pritzker won reelection with more than 60% of the vote, giving him a strong political position as the state defends the measure in court.
The crypto industry has criticized the plan sharply since it emerged, but public support for the levy beyond its backers has been limited. That dynamic leaves the outcome largely in the hands of the court rather than in a broad public debate, at least for now.
The financial stakes for the state are meaningful but modest relative to its overall budget. The estimate of up to $60 million in revenue gives some sense of how much activity the drafters expected the tax to touch. For the industry, however, the concern extends beyond the dollar amount. If a state can successfully impose a transaction-style charge specific to crypto, including on parties that do not hold customer assets, other jurisdictions searching for revenue could consider similar approaches.
8. Why the Illinois case matters beyond the state
State-level crypto policy has become an increasingly important arena as national lawmakers and regulators work through their own frameworks. Taxes in particular are a field where states retain considerable authority, which means the Illinois dispute could influence how other legislatures think about digital assets.
The brief's arguments also touch on questions the industry wants settled more broadly: whether writing software is the same as running a financial business, how location should be determined for transactions on global networks, and whether rules should treat crypto activity differently from comparable activity in other markets.
For crypto users and companies with ties to Illinois, the immediate practical effect is that the tax is not being collected while the case is pending. The six-month delay the state accepted, together with the litigation pause, means businesses have time to watch how the court responds before they must decide how, or whether, they can comply.
9. What's next for the Illinois crypto tax lawsuit
The court case remains ongoing, and the tax will stay on hold while the litigation continues. The delay the state agreed to in September moved the start back at least six months from the original January 1 date.
The court will now weigh the coalition's arguments alongside those of the parties directly involved. A ruling that finds the statute too vague or discriminatory could block or narrow the tax, while a ruling in the state's favor would put pressure on developers, service providers and other network participants to work out how to meet obligations the industry says are unworkable.
Either way, the outcome is likely to be watched closely by crypto companies and by other states considering whether digital asset activity is a viable new source of revenue.