NSNexus by State

Sales Tax on Services in Illinois (2026) — What's Taxable

Updated

Reviewed by Nexus by State research team using official state tax sources. Last reviewed .

Guide content last reviewed: 2026-07-30

Whether Illinois taxes a service depends on how the state draws its tax base, not on how professional the work looks — Services not taxed. Below: the direct answer, which services are taxable, how professional services are treated, and the official IL source behind each rule (retrieved 2026-07-30).

Does Illinois charge sales tax on services?

Services not taxed

No. The Illinois Department of Revenue answers this in one line: "Illinois does not tax sales of service. Illinois does impose service occupation tax on items of tangible personal property transferred as an incident to sales of service." The service component of a sale of service is not taxable; the only part that is taxed is tangible property handed over as part of the service, under the Service Occupation Tax rather than the Retailers' Occupation Tax.

What is taxed instead

  • Tangible personal property transferred as an incident to a sale of service — taxed under the Service Occupation Tax Act and Service Use Tax Act, not as part of the service fee
  • Retail sales of tangible personal property in the ordinary sense, under section 2 of the Retailers' Occupation Tax Act

Not taxed

  • The service component of a sale of service — the Department states that it remains nontaxable, and that only the property transfer inside the transaction is reached

Are professional services taxable in Illinois?

No. The Department states that Illinois does not tax sales of service, so professional fees are outside the base. Only tangible personal property transferred as an incident to the service is taxed, under the Service Occupation Tax.

How Illinois handles services in practice

Illinois runs two complementary pairs of taxes, and knowing which pair you are in is the whole answer. The Retailers’ Occupation Tax and Use Tax govern ordinary sales and purchases of tangible personal property at retail. The Service Occupation Tax and Service Use Tax govern property transferred incident to a sale of service. Neither pair taxes the service itself.

The practical consequence for a service business: if you sell advice, labor, design, or software work and hand over nothing tangible, there is nothing in the Illinois base to tax. If you hand over parts, materials, or printed deliverables as part of the job, that property is where the Service Occupation Tax attaches.

The Department publishes a Sales & Use Tax Matrix (PIO-101) that walks the categories item by item. Check it before assuming a deliverable is “just part of the service” — that judgment is what decides whether Service Occupation Tax is due.

Where these Illinois rules come from

Every statement on this page traces to one of the official sources below. date_retrieved: 2026-07-30.

Illinois nexus note

Illinois sales tax nexus and economic nexus threshold: beginning January 1, 2026, a remote retailer is subject to Illinois state and local Retailers' Occupation Tax when it has $100,000 or more in cumulative gross receipts from sales of tangible personal property to Illinois purchasers during the lookback period. The prior 200-transaction threshold applied from 2021 through 2025 but no longer applies for 2026 and later periods. Remote retailers and marketplace facilitators determine the threshold quarterly for the preceding 12-month period, and destination-based local ROT generally applies when the sale is sourced outside Illinois.

What to do next

Read the full Illinois overview for thresholds, filing frequency, marketplace facilitator rules, and registration links. Use the nexus calculator to check whether you have crossed the threshold. For background on the post-Wayfair economic nexus framework, see the pillar guide.

Worked examples: service businesses in Illinois

The general rule above is easier to apply against a real trade. These national industry guides walk the same question for three service verticals, and each one names the state-by-state differences that decide whether a given invoice is taxable:

Services sales tax in other states

Compare Illinois's services rules with nearby and similar states' services sales tax guides:

Frequently asked questions

Does Illinois charge sales tax on services in 2026?
No. The Illinois Department of Revenue answers this in one line: "Illinois does not tax sales of service. Illinois does impose service occupation tax on items of tangible personal property transferred as an incident to sales of service." The service component of a sale of service is not taxable; the only part that is taxed is tangible property handed over as part of the service, under the Service Occupation Tax rather than the Retailers' Occupation Tax.
Which services are taxable in Illinois?
What is taxed instead in Illinois: Tangible personal property transferred as an incident to a sale of service — taxed under the Service Occupation Tax Act and Service Use Tax Act, not as part of the service fee; Retail sales of tangible personal property in the ordinary sense, under section 2 of the Retailers' Occupation Tax Act. The full list on this page is drawn from Illinois Department of Revenue — Does Illinois tax sales of service?, retrieved 2026-07-30.
Are professional services taxable in Illinois?
No. The Department states that Illinois does not tax sales of service, so professional fees are outside the base. Only tangible personal property transferred as an incident to the service is taxed, under the Service Occupation Tax.
Do I need to register in Illinois if I only sell services?
Registration follows from nexus, not from what you sell. Illinois's economic nexus test is $100,000. Whether your service receipts count toward that threshold, and whether Illinois still expects a registration when your particular service is not taxable, are separate questions that the state answers per service — confirm both with the Illinois revenue agency before deciding you have no filing obligation.
How do I check whether my specific service is taxable in Illinois?
Start from Illinois's posture — services not taxed — then check your own service against the official guidance rather than against a general rule. The primary source for this page is Illinois Department of Revenue — Does Illinois tax sales of service? (https://tax.illinois.gov/questionsandanswers/answer.129.html), retrieved 2026-07-30. Taxability of services changes by statute more often than tax rates do, so re-check the source date before relying on it for a filing.

Sources

date_retrieved: 2026-05-22

Page-specific sources — date_retrieved: 2026-07-30