Illinois Targeted Advertising Tax Challenged Before 2027 Effective Date

Summary

• NetChoice has filed a separate action challenging Illinois’ new Targeted Advertising Services Tax. From January 1, 2027, the enacted measure imposes tax at 10% of Illinois-sourced gross receipts on providers exceeding USD 1 million in relevant receipts during the preceding 12-month period. [netchoice.org], [loeb.com]
• The complaint alleges federal Internet Tax Freedom Act preemption and violations of the Commerce Clause, Due Process Clause, and First Amendment. It argues that, despite technologically neutral statutory language, the measure operates in practice as a discriminatory tax on internet-based advertising. [netchoice.org], [news.wttw.com]
• The challenge remains at an early stage and does not remove current implementation obligations. Advertising providers, publishers, platforms, agencies, and intermediaries should map revenue streams, customer and viewer locations, exemptions, contractual tax provisions, and registration requirements while closely monitoring the litigation. [loeb.com], [leahytax.com]

Article

NetChoice filed NetChoice v. State of Illinois, Case No. 2026CH08791, in the Circuit Court of Cook County on September 11, 2026. The complaint seeks declaratory and injunctive relief against Illinois’ Targeted Advertising Services Tax, which was enacted as part of Public Act 104-0468. [netchoice.org], [news.wttw.com]

Beginning January 1, 2027, the legislation imposes tax at 10% of gross receipts derived from targeted advertising services provided in Illinois. The measure generally applies to a provider whose cumulative Illinois gross receipts from such services exceed USD 1 million during the preceding 12-month period. Its definition refers to advertising that uses personal information about the individuals to whom advertisements are delivered and, on its face, covers delivery through a digital interface or another delivery method. [netchoice.org], [loeb.com]

The complaint alleges that the tax is preempted by the federal Internet Tax Freedom Act because it discriminates against electronic commerce. Although the statutory wording is not expressly limited to internet advertising, the plaintiff claims that the measure applies in practice only to internet-based targeted advertising transactions and does not generally tax comparable offline advertising. [netchoice.org], [news.wttw.com]

The plaintiff also raises Commerce Clause, Due Process Clause, and First Amendment claims. Among other points, it challenges the measure’s apportionment, alleged discrimination against interstate commerce, potential taxation of activity outside Illinois, and treatment of advertising-supported speech. The complaint compares the measure with Maryland’s digital advertising tax, but that comparison forms part of the plaintiff’s legal argument and is not itself a ruling on the Illinois legislation. [netchoice.org], [leahytax.com]

The litigation is pending, and the tax remains enacted. Businesses should therefore avoid assuming that the filing will postpone implementation. Immediate workstreams should include identifying targeted advertising receipts, assessing the USD 1 million threshold, determining where advertisements are delivered, evaluating available exclusions such as the news-media exclusion, and clarifying which entity in a multi-party advertising supply chain is the taxable provider.

Contracts should also be reviewed for tax pass-through rights, data access, audit cooperation, and allocation of liability if sourcing information is incomplete.

Source Links

• Complaint in Case No. 2026CH08791
• NetChoice Illinois Litigation Page
• Background on the Enacted Tax

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