Does an infusion-therapy provider owe Illinois sales tax on the prescription drugs it administers to patients, and at what rate?

Plain-English summary

Someone planning to open an Illinois infusion-therapy practice -- administering prescription drugs for conditions like blood disorders, rheumatoid arthritis, and immune deficiencies through licensed nurses -- asked the Department whether the drugs and the administration service would be tax-exempt, since prescription medications are generally described as sales-tax-exempt in Illinois.

The Department's answer has two parts. First, on the SERVICE itself: because the practice isn't selling tangible personal property outright but rather providing a medical service (administering drugs), regular Retailers' Occupation Tax and Use Tax (the state's core "sales tax") don't apply. Second, and this is the key nuance the taxpayer's research missed: whenever a service provider ("serviceperson") transfers tangible personal property -- here, the drugs themselves -- to a patient as part of that service, the SEPARATE Service Occupation Tax applies to that transferred property. Prescription drugs aren't simply "exempt" in this context; they're taxed, just at a reduced rate.

Illinois taxes medicines, drugs, and medical appliances transferred incident to a service at a reduced 1% state rate (plus applicable local service taxes), instead of the standard 6.25% rate that applies to ordinary tangible personal property. To qualify for the 1% rate, a product must be a pill, powder, potion, salve, or similar preparation that, on its label, makes a written claim to cure, treat, or mitigate a disease, illness, injury, or pain -- grooming and hygiene products don't qualify even if they make similar claims.

The Department also explained how a "serviceperson" calculates its tax base: by separately stating the drug's selling price on the bill, by using 50% of the entire bill as a default, or -- if the practice qualifies as "de minimis" (drug/supply cost under a set percentage of revenue) -- by paying tax on its own cost instead of the billed price.

What this means for you

Healthcare and infusion-therapy providers

Don't assume "prescription drugs are exempt" ends the analysis. If you're providing a medical SERVICE and the drug is transferred to the patient as part of that service, Illinois's Service Occupation Tax applies to the drug -- at a reduced 1% rate if it's a qualifying medicine, not the full 6.25% rate, but it isn't zero. Structure your billing (separately stated drug cost vs. lump-sum bill) with this in mind, since it changes how your tax base is calculated.

Medical practices billing supplies alongside services

The 1% reduced rate is specific to items that qualify as medicine/drugs/medical appliances under 86 Ill. Adm. Code 130.111 -- a written label claim to cure, treat, or mitigate a condition. Ordinary grooming, hygiene, or general medical supplies without that labeling don't get the reduced rate even in a clinical setting.

Accountants and tax professionals

Watch the "de minimis" mechanics in 86 Ill. Adm. Code 140.105 and .109: a serviceperson whose annual drug/supply cost is under 35% of gross service receipts (75% for practices transferring prescription drugs) can register as de minimis and pay tax on COST rather than the billed price, provided it's registered accordingly. This threshold and election matters a lot for a drug-heavy practice's effective tax burden.

Common questions

Q: Are prescription drugs completely tax-exempt in Illinois when administered by a healthcare provider? A: No. When a provider transfers a prescription drug to a patient as part of a billed medical service, Illinois's Service Occupation Tax applies to that drug -- at a reduced 1% state rate for qualifying medicines, rather than being exempt outright.

Q: What makes a product qualify for the reduced 1% rate instead of the standard 6.25% rate? A: It must be a pill, powder, potion, salve, or similar preparation whose label makes a written claim to cure, treat, mitigate, or otherwise address a disease, illness, injury, or pain. Grooming and hygiene products don't qualify even with similar claims.

Q: Is the infusion SERVICE itself (the nursing administration) taxed? A: No -- Retailers' Occupation Tax, Use Tax, Service Occupation Tax, and Service Use Tax generally don't apply to a transaction that doesn't involve transferring tangible personal property. It's specifically the drug/medicine transferred as part of the service that's taxed.

Q: How does a practice calculate its tax base?
A: One of four ways: the separately-stated selling price of the drugs transferred, 50% of the entire bill if the price isn't separately stated, cost price if registered as a de minimis serviceperson, or Use Tax on cost price for certain non-registered de minimis providers.

Q: Can I rely on this letter for my own practice?
A: No. This is a General Information Letter, not binding on the Department and not tied to any specific taxpayer's facts -- it explains the general framework, but confirm your own billing structure with a tax professional.

Citations and references

Statutes:

• 35 ILCS 115/2(g) (de minimis serviceperson registration)

Regulations:

• 86 Ill. Adm. Code 130.101 (Retailers' Occupation Tax imposition)
• 86 Ill. Adm. Code 150.101 (Use Tax imposition)
• 86 Ill. Adm. Code 140.101 (Service Occupation Tax Act imposition)
• 86 Ill. Adm. Code 140.126 (reduced 1% rate for medicines, drugs, medical appliances)
• 86 Ill. Adm. Code 130.111 (qualifying medicine/drug definition)
• 86 Ill. Adm. Code 140.105, 140.106, 140.108, 140.109 (tax-base calculation methods; de minimis threshold)
• 86 Ill. Adm. Code 270.115 (local taxing jurisdiction for service sourcing)

Source

• Landing page: Illinois 2026 Sales Tax Letter Rulings
• Original PDF: ST26-0018-GIL.pdf

Original ruling text

ST 26-0018-GIL 05/08/2026 SERVICE OCCUPATION TAX
Generally, a provider of medical services is considered engaged in the business of making sales of services. As a serviceperson, the Service Occupation Tax is imposed upon all tangible personal property transferred as an incident to the sale of such service. Prescription and non-prescription medicines, drugs, and medical appliances are taxed at a reduced State rate of 1%, plus applicable local service taxes based on the location of the sale of the service. See 86 Ill. Adm. Code 140.126. (This is a GIL). May 8, 2026 NAME EMAIL Dear NAME: This letter is in response to your letter dated March 18, 2026, in which you requested information. The Department issues two types of letter rulings. Private Letter Rulings (“PLRs”) are issued by the Department in response to specific taxpayer inquiries concerning the application of a tax statute or rule to a particular fact situation. A PLR is binding on the Department, but only as to the taxpayer who is the subject of the request for ruling and only to the extent the facts recited in the PLR are correct and complete. Persons seeking PLRs must comply with the procedures for PLRs found in the Department’s regulations at 2 Ill. Adm. Code 1200.110. The purpose of a General Information Letter (“GIL”) is to direct taxpayers to Department regulations or other sources of information regarding the topic about which they have inquired. A GIL is not a statement of Department policy and is not binding on the Department. See 2 Ill. Adm. Code 1200.120. You may access our website at https://tax.illinois.gov/ to review regulations, letter rulings, and other types of information relevant to your inquiry. The nature of your inquiry and the information you have provided require that we respond with a GIL. INQUIRY: I hope you are doing well. I am writing to seek guidance as I prepare to establish a new healthcare company in Illinois. Our organization will focus on providing infusion therapies and infusion drugs for several medical conditions, including:
•
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Blood disorders

NAME
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May 8, 2026
o
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Rheumatoid arthritis
Immuno deficiency disorder
Bipolar disorder
Chronic gut

All medications administered in our practice are prescription-only drugs and will be infused and administered by licensed/registered nurses in a clinical setting. Based on Illinois tax guidance, I understand that prescription medications are exempt from Illinois state sales tax. Additionally, drugs and medicines generally qualify for reduced or exempt tax treatment under Illinois Administrative Code. [taxjar.com] [salestaxhandbook.com] However, before we finalize our operational structure and billing procedures, I would like clarification on the following: Questions

1. Are prescription infusion drugs used for the above conditions fully
   exempt from Illinois sales tax?
2. Are the infusion services themselves—i.e., the administration of
   these drugs by registered nurses—considered taxable or exempt?
3. If both the drug and the administration service are exempt, are
   there any specific registration, documentation, or exemption certificate requirements we must follow? We want to ensure full compliance with Illinois Department of Revenue regulations from the outset, and your guidance will help us set up accurate tax handling procedures. Thank you very much for your assistance. I appreciate your time and look forward to your response. DEPARTMENT’S RESPONSE: The Retailers’ Occupation Tax Act imposes a tax upon persons engaged in this State in the business of selling tangible personal property at retail to purchasers for use or consumption. See 86 Ill. Adm. Code 130.101. Use Tax is imposed on the privilege of using, in this State, any kind of tangible personal property that is purchased anywhere at retail from

NAME
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a retailer. See 86 Ill. Adm. Code 150.101. These taxes comprise what is commonly known as “sales tax” in Illinois. Retailers’ Occupation and Use Taxes do not apply to sales of service. The Service Occupation Tax Act and Service Use Tax Act are imposed on the transfer of tangible personal property incident to sales of service. 86 Ill. Adm. Code 140.101 and 160.101. If a transaction does not involve the transfer of any tangible personal property to the customer, then the taxpayer generally would not be subject to Retailers’ Occupation Tax, Use Tax, Service Occupation Tax, or Service Use Tax. Generally, a provider of medical services is considered to be engaged in the business of making sales of services. As a serviceperson, the Service Occupation Tax is imposed upon all tangible personal property transferred as an incident to the sale of such service. The tax rate imposed depends on the nature of the tangible personal property transferred to the service customer. Prescription and non-prescription medicines, drugs, and medical appliances are taxed at a reduced State rate of 1%, plus applicable local service taxes based on the location of the sale of the service. See 86 Ill. Adm. Code 140.126. Also see 86 Ill. Adm. Code 270.115 for information on selling activities used to determine the local taxing jurisdiction. Tangible personal property transferred to the service customer that does not qualify for the low rate is taxed at the State rate of 6.25%, plus applicable local taxes. A medicine or drug that qualifies for the reduced State rate of 1% includes any pill, powder, potion, salve, or other preparation for human use that, on the label, purports to have medicinal qualities. A written claim on the label that a product is intended to cure or treat disease, illness, injury, or pain, or to mitigate the symptoms of such disease, illness, injury, or pain, constitutes a medicinal claim. However, grooming and hygiene products do not qualify for the 1% rate, regardless of whether the products make medicinal claims or meet the definition of over-the-counter drugs. See 86 Ill. Adm. Code 130.111; 86 Ill. Adm. Code 140.126. Servicepersons may calculate their tax base in one of four ways: (1) separately-stated selling price of the tangible personal property transferred incident to the sales of the service; (2) 50% of the serviceperson’s entire bill; (3) Service Occupation Tax on the cost price if the serviceperson is a registered de minimis serviceperson; or (4) Use Tax on the cost price of the tangible personal property transferred, if the serviceperson is de minimis and is not otherwise required to be registered under Section 2a of the Retailers’ Occupation Tax Act. See 86 Ill. Adm. Code Sections 140.106; 140.108; and 140.109. Under the first method, a serviceperson may separately state the selling price of each item transferred as part of a sale of services. The tax is based on the separately stated selling price of the tangible personal property transferred. If a serviceperson does not wish to separately state the selling price of the tangible personal property transferred, that

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serviceperson must use the second method, in which the tax base is 50% of the entire bill to their service customers. Both methods provide that, in no event, may the tax base be less than the cost price of the tangible personal property transferred. Under these methods, servicepersons may provide their suppliers with a resale certificate when purchasing the tangible personal property to be transferred as part of a sale of services. The serviceperson is required to collect the corresponding Service Use Tax from their customers. See 86 Ill. Adm. Code 140.106. The third way servicepersons may account for their tax liability applies only to de minimis servicepersons who have either chosen to be registered, are required to be registered because they incur Retailers’ Occupation Tax liability for a portion of their business, or, beginning January 1, 2026, maintain a place of business in this State and make any retail sales of tangible personal property to purchasers in Illinois. 35 ILCS 115/2(g); see also 86 Ill. Adm. Code 140.109. Servicepersons may qualify as de minimis if their annual aggregate cost price of tangible personal property transferred incident to the sale of service is less than 35% of total annual gross receipts from service transactions (75% or greater in the case of servicepersons transferring prescription drugs). Servicepersons do not have the option to determine whether the de minimis status is met on a transaction-by-transaction basis. Registered de minimis servicepersons should provide their suppliers with a resale certificate and remit State and any applicable local Service Occupation Tax based on the cost price of the tangible personal property transferred incident to the sale of their service. This method also results in the customer incurring a Service Use Tax liability. The final method for determining tax liability may be used by de minimis servicepersons who are not otherwise required to register under Section 2a of the Retailers’ Occupation Tax Act, or, beginning January 1, 2026, by any serviceperson maintaining a place of business in this State who does not make any retail sales of tangible personal property to purchasers in Illinois. Such de minimis servicepersons handle their tax liability by paying Use Tax to their suppliers. If their suppliers are not registered to collect and remit tax, the serviceperson must register, self-assess, and remit Use Tax to the Department. The servicepersons are considered the end-users of the tangible personal property transferred incident to their service. Consequently, they are not authorized to collect a “tax” from their customers. 35 ILCS 110/2(7); see also 86 Ill. Adm. Code 140.108. Under this method, the customer incurs no Service Use Tax liability. However, the servicepersons may either seek reimbursement of the tax from their customers or build the tax into their prices. I hope this information is helpful. If you require additional information, please visit our website at https://tax.illinois.gov/ or contact the Department’s Taxpayer Information Division at 800-732-8866. Very truly yours,

NAME
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Thomas Grudichak
Associate Counsel
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Printed by the authority of the State of Illinois
Electronic Only - One Copy
Issued 05/08/2026, Redacted 5/28/2026