Overview

On June 16, 2026, Illinois became the first state in the nation to enact a tax on digital asset transactions. Senate Bill 3019 (Public Act 104-0468), which includes Article 3 – the Digital Asset Tax Act (the Act) – imposes a 0.2% tax on the “privilege” of receiving digital asset business activity from a broker. Effective January 1, 2027, the tax applies when a customer exchanges, transfers, or stores digital assets in Illinois for consideration. The tax base is the “value of the digital asset to which the digital asset business activity relates.”

The Act is riddled with inconsistencies and undefined key terms, and it borrows heavily from Illinois’s sales tax regime – a framework designed for tangible goods, not digital assets. Until the Legislature amends the statute or the Illinois Department of Revenue (the Department) issues clarifying regulations, brokers, banks, custodians, and digital asset issuers will face significant uncertainty about whether and how the tax applies to their activities. That uncertainty is underscored by House Bill 5798, introduced on June 22, 2026, which, if enacted, would repeal the Act in its entirety, effective immediately. Uncertainty is further compounded by a lawsuit filed on July 21, 2026, challenging the Act’s validity on multiple constitutional and federal preemption grounds (Chamber of Digital Commerce v. David Harris, Director, Illinois Department of Revenue et al., Circuit Court of Sangamon County, Seventh Judicial Circuit). Stakeholders should begin compliance planning now, even though the Act faces an active legal challenge and possible legislative amendment or repeal.

What is “value”? The taxable base problem

The Act taxes the “value of the digital asset to which the digital asset business activity relates,” but nowhere defines “value.”¹ Is it fair market value at the time of the transaction? The bid price? The ask price? Something else? Without regulatory guidance, brokers will need to develop – and be prepared to defend – their own valuation methodologies.

Adding to the confusion, the collection provision directs brokers to collect the tax “by adding the tax to the amount of the purchase price received from the customer.”² “Purchase price” is defined as the consideration paid for digital asset business activity, “valued in money, whether received in money or otherwise,” including “any and all charges that the customer pays related to or incidental to the receipt of digital asset business activity.”³ On its face, “purchase price” appears limited to the broker’s fees – not the value of the underlying asset. Yet the tax is imposed on the asset’s “value.” This inconsistency will require clarification through legislation or regulation.

For most exchanges, taxable value and purchase price will roughly align – a customer generally pays the asset’s value plus fees. But for custody, storage, or transfer services, the two measures can diverge sharply: a flat custody fee may bear no relationship to the value of the assets held. This presents a risk that, in some circumstances, the tax could exceed the purchase price being paid by the customer.

One transaction, three taxes? The pyramiding problem

A taxable “sale” occurs only when there is “valuable consideration” for digital asset business activity.⁴ “Digital asset business activity” includes any single instance of exchanging, transferring, or storing a digital asset on behalf of a customer – and “transfer” sweeps in moving an asset between accounts owned by the same customer. The consideration requirement is the sole statutory gatekeeper, and it raises distinct questions for each transaction type.

For exchanges, the analysis is relatively straightforward: if a customer pays a commission, spread, or transaction fee, consideration exists. Storage is murkier. An explicit custody fee likely satisfies the requirement – and, troublingly, each billing cycle could constitute a separate taxable “sale” measured on the full value of assets in custody. The harder question is what happens with “free” custody bundled into a trading account. The Act defines “purchase price” to include consideration “whether received in money or otherwise, including cash, gift cards, credits, and property.”⁵ Where no fee is charged and no value flows to the broker, there may be no taxable sale. But the broad “purchase price” definition – covering consideration “received in money or otherwise” – creates risk. The Department might characterize embedded platform benefits as consideration. Until guidance is issued, brokers cannot safely assume that zero-fee services fall outside the tax.

The bundling provision amplifies these concerns. Section 3-15 provides that if digital asset business activity is “sold as a bundle of separate services, each service shall constitute an individual sale.” Picture this: a customer buys a digital asset (exchange), holds it on the platform (storage), and then moves it to another wallet (transfer). Under the Act, that single interaction could generate three separate taxable sales – each at 0.2% of the full asset value. If the broker charges an all-in fee covering all three services, that fee likely constitutes consideration for each unbundled component.

This stacking effect may be unintended, but it follows naturally from the statute’s text. Whether any particular activity is taxable will ultimately depend on whether “valuable consideration” can be identified for that specific service – a fact-intensive inquiry the Act does nothing to simplify.

Where is the customer? Sourcing rules and broker risk

For in-person sales, sourcing is simple: the transaction is taxable if it occurs at a physical location in Illinois. For electronic or phone sales, Section 3-25 creates a rebuttable presumption that the customer is in Illinois if account data – home address, mailing address, IP address, or other “place of primary use” information – points to the state.

The burden of rebutting the Illinois presumption falls entirely on the broker. While brokers may develop “reasonable categorization standards” for analyzing customer data, reliance on those standards “does not alleviate the digital asset broker’s burden of proof.”⁶ And Section 3-35 makes clear that brokers are liable for the tax “whether or not it is collected from the customer.” In short: prove the customer is out-of-state, or pay.

Square peg, round hole: Incorporating the sales tax statute 

Section 3-60 incorporates numerous provisions of the Retailers’ Occupation Tax Act (ROTA) – Illinois’s sales tax statute – into the Digital Asset Tax Act. The incorporation directs that “retailers” means “digital asset brokers” and “tangible personal property” means “digital asset business activity.”

The problem is obvious: ROTA was built for sales of tangible goods. Its rules on returns, credits, exemptions, and administration may not translate coherently to digital asset transactions. Practitioners will need to parse each incorporated ROTA provision and determine how – or whether – it applies in the digital asset context. The definitional puzzle is also broader than ROTA, pulling from two additional bodies of law: the broker definition draws from Internal Revenue Code (IRC) Section 6045(c)(1)(D) and the digital asset definition incorporates the Digital Assets and Consumer Protection Act (DACPA), 205 ILCS 731/1-1, et seq..

DACPA defines “digital asset” as “a digital representation of value that is used as a medium of exchange, unit of account, or store of value, and that is not fiat currency.” The definition, while intentionally broad, excludes certain categories of digital value, including rewards and loyalty program points, in-game assets, prepaid card value, digital goods or rights with independent utility (such as tickets, music, or artwork), and assets not marketed for investment or speculative purposes. That last exclusion does not apply to meme-based tokens or assets designed to maintain a stable nominal value. Layering in the IRC Section 6045(c)(1)(D) broker definition and DACPA’s definition of “digital assets,” interpretation becomes a multi-statute puzzle.

Registration, filing, and penalties

Beginning January 1, 2027, it will be unlawful to operate as a digital asset broker in Illinois without a certificate of registration from the Department.⁷ Certificates are valid for one year and renew automatically unless revoked. Out-of-state brokers must register if their Illinois gross receipts hit $100,000 or more over any rolling 12-month period, tested quarterly.⁸

Brokers must file monthly returns by the 20th of each month and maintain records adequate to document digital asset business activity conducted in Illinois, including customer location data.⁹ The consequences of non-compliance are severe: failing to file, filing a fraudulent return, or willfully violating Department rules is a Class 3 felony.¹⁰ Additionally, it is unclear whether Illinois can require a nationally chartered bank supervised by the Office of the Comptroller of the Currency to obtain a state license before conducting its federally authorized banking activities in Illinois.

The legal challenge: Chamber of Digital Commerce v. Harris 

On July 21, 2026, The Digital Chamber (TDC), a nonprofit trade association representing more than 250 blockchain industry participants, filed a verified complaint for declaratory and injunctive relief in the Circuit Court of Sangamon County. The complaint names the Director of the Department and the Illinois Attorney General as defendants in their official capacities and asks the court to declare the Act facially invalid and to enjoin its enforcement before the January 1, 2027 effective date.

The complaint advances six counts. First, TDC alleges the Act violates the Illinois Uniformity Clause because it classifies solely by recordkeeping technology – imposing a custody, transfer, and transaction-level tax on digital asset activity while exempting functionally identical financial services conducted through traditional infrastructure. The complaint argues there is no real and substantial difference between, for example, a Treasury security and a tokenized Treasury security, or between a dollar held in a payment account and a dollar-denominated stablecoin; the only distinction is the ledger on which ownership is recorded.

Second, TDC raises an Illinois due process challenge on three independent theories: (i) the Act is void for vagueness because it leaves undefined every element necessary to compute, collect, or comply with the tax – including the taxable property, the taxpayer, the taxable event, the measure of tax, and the geographic nexus – yet imposes felony liability for noncompliance; (ii) the in-state presumption violates procedural due process by shifting the burden to brokers to prove a negative that, given the borderless nature of blockchain transactions, is often impossible to establish; and (iii) the Act violates substantive due process because it imposes uncollectible strict liability on brokers and taxes custody and non-realization transfers of property, measured repeatedly by the full asset value, bearing no rational relationship to any legitimate governmental interest.

Third, TDC contends the Act’s Class 3 felony penalty for noncompliance with a novel and vague 0.2% transaction tax is grossly disproportionate to the seriousness of the offense, violating the Illinois Constitution’s proportionate penalties provision.

Fourth, TDC alleges the Act violates the federal Dormant Commerce Clause. The complaint argues the Act fails all four prongs of the Complete Auto test: it lacks a substantial nexus because blockchain transactions occur on decentralized networks with no fixed situs; it is not fairly apportioned because the tax is measured by the entire value of the digital asset upon each occurrence without regard to the proportion of activity connected to Illinois; it discriminates against interstate commerce by singling out an inherently interstate mode of commerce while leaving identical traditional-channel activity untaxed; and it bears no fair relation to state services because the full-value tax applies regardless of any benefit Illinois provides.

Fifth, TDC asserts a parallel due process claim under the Fourteenth Amendment to the United States Constitution. Sixth, and finally, TDC alleges the Act is preempted by the Internet Tax Freedom Act, which prohibits discriminatory state taxation of electronic commerce. The complaint argues that digital asset business activity is electronic commerce and that the Act taxes the electronic exchange, transfer, and storage of value while imposing no tax on transactions involving similar or identical property accomplished through traditional means – precisely the technology-specific taxation Congress intended to prohibit.

Additionally, although not raised as an argument in TDC’s recently filed complaint, taxation of merely storing (owning) digital assets measured by their full asset value could also violate the Illinois Constitution’s prohibition on ad valorem taxation of personal property.

TDC brings this action as a pre-enforcement facial challenge on behalf of its members, which include digital asset exchanges, custodians, financial institutions, payment companies, stablecoin issuers, and blockchain infrastructure providers. The complaint emphasizes that members are already incurring substantial, unrecoverable compliance costs – anticipated to range from approximately $10,000 to more than $1,000,000 per company – to prepare for the Act’s effective date, and that sovereign immunity bars recovery of those costs if the Act is ultimately struck down.

Outlook: Prepare for compliance, expect challenges

The Act leaves fundamental questions unanswered. While waiting for Department guidance (or a court decision), companies engaged in digital asset business activity should take the following steps:

• Assess broker status and taxable activities. Determine whether you qualify as a “digital asset broker” under IRC Section 6045(c)(1)(D), identify which services constitute taxable “exchanging,” “transferring,” or “storing,” and evaluate whether the bundling provision could generate multiple taxable events. Consider whether same-customer wallet transfers or custody services involve “valuable consideration.”
• Build customer-location documentation systems. The burden of proof is on the broker. Establish “reasonable categorization standards” and maintain records sufficient to rebut the Illinois presumption for electronic transactions.
• Develop a valuation methodology. Create an internal approach to determining “value” and reconciling the gap between the tax imposition section (asset value) and the collection section (purchase price). Document your rationale thoroughly – you may need to defend it on examination.
• Monitor the litigation, guidance, and legislative developments. Watch for developments in Chamber of Digital Commerce v. Harris, including any preliminary injunction ruling that could affect the Act’s January 1, 2027 effective date. Also monitor Department guidance on the definition of “value,” the treatment of custody services, and the scope of “valuable consideration.” Given the statute’s drafting deficiencies, legislative amendments before the effective date remain possible, as does potential repeal under House Bill 5798.

Stakeholders must plan for implementation, even though the Act is now actively being challenged in court and is vulnerable to being declared unlawful. The path forward is uncertain – but doing nothing is not an option.

1. Act § 3-20(a).
2. Act § 3-35(b).
3. Act § 3-15.
4. Id.
5. Id.
6. Act § 3-25.
7. Act § 3-30.
8. Act § 3-15.
9. Act § 3-40 and Act § 3-45.
10. Act § 3-55.

Client Alert 2026-154