Retailers' Occupation Tax and Use Tax with state and highly granular local layers
Start with the high-impact answers, then use the complete rule explorer for product-specific and long-tail research.
Retailers' Occupation Tax and Use Tax with state and highly granular local layers Illinois sourcing is role-sensitive. In-state retailers often source occupation tax from the selling location, while remote retailers can face destination-based state and local use-tax rules. Home-rule, business-district, RTA, and Metro-East layers add submunicipal complexity.
The state general merchandise component is 6.25%, but local overlays and sourcing regime determine the combined result. ZIP codes cannot safely identify many business and transportation districts.
The principal repository-tracked return is ST-1. Paper eligibility is taxpayer-specific; electronic filing or a waiver may control.
Facilitator-collected sales are generally excluded from the seller's return when the state's evidence and certification requirements are satisfied.
The repository tracks Illinois Certificate of Resale and supports generation from reviewed fields. Certificate validity still depends on the purchaser, seller, claimed use, dates, signatures, and any state-specific acceptance conditions.
The current Atlas research does not publish an active holiday rule for this state. Confirm the current revenue-department calendar before changing tax.
No separately verified special-rate category is published in the current member-state register for this jurisdiction. Product-specific research observations remain available below.
The corpus contains one prewritten software observation under these researched conditions: software origin: prewritten; transfer method: electronic; sale context: downloaded or mobile application. The research observation says the observed treatment is included in base; with general rate lookup; a 6.25% state rate; local interaction: ordinary local stack; sourcing: special; effective from 2026-01-01. Downloaded canned software including mobile applications and games is taxable at the high rate unless a separate license exemption applies. Status: Research observation — independent review required. Confirm the cited authority and transaction facts before use.
The corpus contains one prepared food observation under these researched conditions: sale context: on premises or immediate consumption. The research observation says the observed treatment is included in base; with general rate lookup; a 6.25% state rate; local interaction: ordinary local stack; sourcing: standard situs; effective from 2026-01-01. Food for on-premises or immediate consumption is taxable at the high rate. Status: Research observation — independent review required. Confirm the cited authority and transaction facts before use.
The corpus contains one durable medical equipment observation under these researched conditions: intended user: human; qualifying use: direct substitute for malfunctioning body part. The research observation says the observed treatment is included in base; with special rate required; a 1% state rate; local interaction: product specific local; sourcing: standard situs; effective from 2026-01-01. Medical appliances directly substituting for a malfunctioning human body part use the 1 percent low state rate. Status: Research observation — independent review required. Confirm the cited authority and transaction facts before use.
Choose the calculation engine or the compliance workflow. Inspect the public examples, then bring five cases from your business.
Evaluate addresses, product identity, certificate dates, refunds and retries with the same inputs your integration will use.
Inspect calculation examples →Disclosed reference inputs and executed results. Confirm coverage and configuration for your own transactions.
Evaluate the calculation engine →Trace a generated sample return to its source rows. See how seller sales, marketplace activity and unresolved responsibility are separated.
Trace the sample return →Synthetic Virginia package demonstration. Review, authorization and state acceptance remain separate steps.
Evaluate sales tax compliance →See task rates and subscription prices. Public evidence is open to inspect; we confirm scope and commercial terms before a private evaluation.
Illinois sourcing is role-sensitive. In-state retailers often source occupation tax from the selling location, while remote retailers can face destination-based state and local use-tax rules. Home-rule, business-district, RTA, and Metro-East layers add submunicipal complexity.
The state general merchandise component is 6.25%, but local overlays and sourcing regime determine the combined result. ZIP codes cannot safely identify many business and transportation districts.
Tax situs is a legal determination. Mailing city, ZIP code, county proximity, and geocoding are useful evidence, but none should silently substitute for the jurisdiction rule that controls the transaction.
Product identity should be established before a rate is selected. In Illinois, examples that deserve their own rule path include:
These are examples, not an exhaustive taxability matrix. Bundles, customer use, delivery method, exemptions, and effective dates can change the result.
The underlying research inventory contains 23 Illinois treatment records across 19 product families. The inventory includes effective-date, evidence, rate-class, local-interaction, and sourcing fields. Its breadth is not a claim that every observed treatment is active in production: unresolved or independently unreviewed records remain non-operative.
23 of 23 records shown
Research observation — independent review required
Before operational use: ingest Tax Rate Finder local windows; encode occupation versus use tax role; independent review
Research observation — independent review required
Identity or conditions: sale context: off premises qualifying food
Before operational use: ingest approved local grocery ordinance windows; encode complete food boundary; independent review
Research observation — independent review required
Identity or conditions: sale context: on premises or immediate consumption
Before operational use: encode complete immediate-consumption boundary; ingest local windows; independent review
Research observation — independent review required
Identity or conditions: subtype: adult use
Before operational use: pin cannabis excise and local component authorities; encode form and THC distinctions; independent review
Research observation — independent review required
Before operational use: encode candy definition; ingest local windows; independent review
Research observation — independent review required
Before operational use: encode beverage definition; ingest local windows; independent review
Research observation — independent review required
Identity or conditions: intended user: human; prescription status: prescription
Before operational use: encode Medicare Part D payer rule; ingest transportation-district windows; independent review
Research observation — independent review required
Identity or conditions: intended user: human; prescription status: nonprescription; sale context: qualifying medicine not grooming or hygiene
Before operational use: encode medicine versus grooming boundary; ingest transportation-district windows; independent review
Research observation — independent review required
Identity or conditions: purchaser status: medical cardholder
Before operational use: pin other medical-cannabis tax components; encode registered-patient evidence; ingest local windows; independent review
Research observation — independent review required
Identity or conditions: intended user: human; qualifying use: direct substitute for malfunctioning body part
Before operational use: encode direct-substitution medical function; ingest transportation-district windows; independent review
Research observation — independent review required
Identity or conditions: intended user: human; qualifying use: human diabetes treatment
Before operational use: encode complete qualifying item list; ingest transportation-district windows; independent review
Research observation — independent review required
Before operational use: pin pre-2026 start if historical calculation is required; independent review
Research observation — independent review required
Before operational use: obtain and pin post-2026 authority; independent review
Research observation — independent review required
Before operational use: encode qualifying supplement definition; ingest local grocery ordinance windows; independent review
Research observation — independent review required
Identity or conditions: subtype: grooming or hygiene
Before operational use: encode complete grooming and hygiene list; ingest local windows; independent review
Research observation — independent review required
Identity or conditions: qualifying use: manufacturing over 50%; required certificate: ST-587
Before operational use: encode manufacturing-use and product-scope details; validate certificate lineage; independent review
Research observation — independent review required
Identity or conditions: qualifying use: resale; required certificate: CRT-61
Before operational use: validate registration and certificate lineage; encode first-use boundary; independent review
Research observation — independent review required
Identity or conditions: rented product: ordinary tangible personal property
Before operational use: encode registered vehicle watercraft aircraft and semitrailer exceptions; ingest local windows; independent review
Research observation — independent review required
Identity or conditions: maximum rental days: 365; rented product: automobile
Before operational use: route separate automobile-rental taxes outside sales tax; pin historical window if required; independent review
Research observation — independent review required
Identity or conditions: software origin: prewritten; transfer method: electronic; sale context: downloaded or mobile application
Before operational use: encode complete license exemption conditions; ingest local windows; independent review
Research observation — independent review required
Identity or conditions: transfer method: electronic; sale context: cloud only never downloaded
Before operational use: encode cloud-only evidence and mixed-delivery boundary; independent review
Research observation — independent review required
Identity or conditions: software origin: custom; sale context: real and substantial custom coding
Before operational use: encode real-and-substantial customization evidence; independent review
Research observation — independent review required
Identity or conditions: qualifying use: production agriculture over 50%; required certificate: ST-587
Before operational use: encode agricultural use percentage and equipment boundary; validate certificate lineage; independent review
The principal repository-tracked return is ST-1. Paper eligibility is taxpayer-specific; electronic filing or a waiver may control.
How to file Illinois sales tax: 2026 due dates, frequencies, and forms →
Facilitator-collected sales are generally excluded from the seller's return when the state's evidence and certification requirements are satisfied.
Seller registration, nexus thresholds, zero-return obligations, facilitator certifications, and direct sales must be evaluated separately. Prophit keeps those facts attached to the return treatment instead of dropping marketplace transactions from the record.
The repository tracks Illinois Certificate of Resale and supports generation from reviewed fields. Certificate validity still depends on the purchaser, seller, claimed use, dates, signatures, and any state-specific acceptance conditions.
A certificate should be tied to the correct customer, seller, state, reason, product use, effective period, and transaction population, then monitored for expiration or changed facts.
Prophit currently structures Illinois transaction data for worksheet for portal entry. Availability is kept separate from customer credentials, state acceptance, and direct transmission authority.
See how Prophit.ai compares to other options in the sales tax software buyer's guide.
Product availability varies by jurisdiction and customer configuration. Workflow support does not by itself establish registration, filing authority, credentials, agency acceptance, or tax advice.
This guide is grounded in the repository's reviewed filing, marketplace, certificate, and tax-authority records. Rules change; confirm the current source and effective period before acting.
Reviewed and current as of October 26, 2026
Combined general-merchandise retailers' occupation tax rate for the municipality or unincorporated county area. Business-district and home-rule address-level layers can change the rate at specific addresses; grocery rates differ.
These county and city rates are the reference snapshot dated October 1, 2026. This guide's review date does not certify them as current; confirm the current rate with the state before filing.
