No, Illinois does not charge state sales tax on Software-as-a-Service (SaaS). SaaS is treated as a non-taxable service because it transfers no tangible personal property. But Chicago is the exception: its Personal Property Lease Transaction Tax (PPLTT) reaches cloud software and rises to 15% on January 1, 2026, per the City of Chicago Department of Finance 2026 rate-change notice.
This guide is for SaaS and subscription businesses selling into Illinois. It covers the state-level answer, the Chicago cloud tax, nexus thresholds, exemptions, registration, and filing.
Is SaaS Taxable in Illinois?
No, Illinois does not tax SaaS at the state level. Illinois imposes its Retailers’ Occupation Tax (ROT) on retail sales of tangible personal property, and a complementary Use Tax on buyers’ use of that property. SaaS transfers no tangible personal property and no permanent software right, so it falls outside both taxes under 86 Ill. Adm. Code 130.1935.
Cloud-delivered software that is never downloaded and is only accessed remotely is not taxable, per Illinois Department of Revenue guidance. The exception is Chicago, which taxes cloud software separately through the PPLTT, covered below.
What Are the 2026 Illinois SaaS Sales Tax Rates?
SaaS itself carries no Illinois state sales tax. The rates below apply to taxable software and property sales, plus Chicago’s PPLTT on cloud software.
| Tax category | Rate | Source |
|---|---|---|
| Statewide base rate | 6.25% | Illinois Department of Revenue (IDOR) |
| Average combined state-and-local rate (2026) | 8.96% | Tax Foundation, Illinois |
| Do local rates apply? | Yes | IDOR |
| Chicago PPLTT on SaaS (2026) | 15% | City of Chicago Department of Finance |
The 6.25% base rate applies to general merchandise, including taxable prewritten software, per the Illinois Department of Revenue. Older figures near 8.82% are stale; the 2026 combined average is 8.96% per the Tax Foundation.
What Is the Chicago Personal Property Lease Transaction Tax (PPLTT)?
The Chicago Personal Property Lease Transaction Tax (PPLTT), known as the “cloud tax” or “lease tax,” is a City of Chicago tax on charges for using cloud software and remotely accessed computer resources in Chicago. It is administered by the Chicago Department of Finance under Municipal Code Chapter 3-32, separate from Illinois state sales tax.
The rate has climbed in annual steps, tracking the City of Chicago Department of Finance PPLTT rate history.
| Effective date | PPLTT rate | Source |
|---|---|---|
| Through Dec 31, 2024 | 9% | Chicago Department of Finance |
| Jan 1, 2025 | 11% | Chicago Department of Finance (2025 Revenue Ordinance, passed Dec 16, 2024) |
| Jan 1, 2026 | 15% | Chicago Department of Finance (2026 Revenue Ordinance, passed Dec 20, 2025) |
The 2026 rate change notice states the 15% rate applies to all leases, including nonpossessory computer leases. There is no grandfathering: the City of Chicago Department of Finance applies the new rate to lease and billing periods on or after January 1, 2026, even under existing multi-year contracts.
Who Has to Pay the Chicago PPLTT?
The Chicago PPLTT is owed based on where the customer uses the software, not where the seller sits. It applies when use occurs within Chicago city limits, and it applies to both B2B and B2C transactions; the customer’s entity type does not remove it. Chicago-based use triggers the tax, not mere Illinois presence.
Under the Municipal Code’s definition of a “nonpossessory computer lease,” the tax applies based on where the customer’s terminal or access point is located. Under Chicago Lease Tax Ruling #12, providers may apportion charges when a customer’s users are split between Chicago and elsewhere, and may use the customer’s Chicago billing address as a proxy for use location absent better data.
What Exemptions Apply to the Chicago PPLTT?
The Chicago PPLTT ordinance (Municipal Code Chapter 3-32) exempts two lessee classes and twelve categories of leases, per the Chicago Department of Finance. SaaS sellers should check each before assuming the 15% rate applies.
- Exempt lessees: governmental bodies, and charitable, educational, and religious organizations.
- Exempt lease categories (12 total): examples include property used primarily outside the city, related-party leases, ATM and bank-transaction computer leases, and de minimis information-retrieval leases.
These PPLTT exemptions are set by the city ordinance and are distinct from Illinois state sales tax exemptions. Confirm your specific facts against Chapter 3-32 before claiming any category.
How Do You Register and File the Chicago PPLTT?
PPLTT registration and remittance are separate from Illinois state sales tax. An out-of-state SaaS company with Chicago customers registers with the City of Chicago Department of Finance and files the PPLTT return (Form 7550, Municipal Code reference 3-32); it is not bundled into the IDOR ST-1 filing.
The Chicago Department of Finance administers PPLTT registration, filing, and remittance directly. Because Illinois state sales tax and the Chicago cloud tax run on separate systems, a company can owe nothing to the state yet still owe Chicago PPLTT on its Chicago receipts. Confirm your filing frequency and any remote-lessor economic nexus standard with the Department of Finance.
Is Downloaded or Custom Software Taxable in Illinois?
Prewritten (canned) software is taxable in Illinois even when downloaded or delivered electronically; custom software developed for a specific customer is not taxable. This treatment is set by 86 Ill. Adm. Code 130.1935 and confirmed by IDOR.
| Product type | Taxable at Illinois state level? | Source |
|---|---|---|
| SaaS (remotely accessed software) | No | 86 Ill. Adm. Code 130.1935(a)(3) |
| Custom software | No | 86 Ill. Adm. Code 130.1935(c) |
| Prewritten software (downloaded or electronic) | Yes | 86 Ill. Adm. Code 130.1935(a) |
| Subscription software accessed remotely | No | 86 Ill. Adm. Code 130.1935(a)(3) |
| Digital goods (e-books, music, movies) | No | 86 Ill. Adm. Code 130.2105 |
When Is a Software License Exempt in Illinois?
A software license is exempt from Illinois ROT only when the license agreement meets all five criteria of 86 Ill. Adm. Code 130.1935(a)(1). This is central to how Illinois treats software licensing, so verify each point before treating a licensed program as non-taxable.
- It is evidenced by a written agreement signed by the licensor and the customer.
- It restricts the customer’s duplication and use of the software.
- It prohibits sublicensing, assignment, or transfer without the licensor’s permission.
- It provides for archival or backup copies under a documented policy.
- It requires destruction or return of all copies at the end of the license period.
Are Digital Goods Taxable in Illinois?
No. Illinois does not impose state sales tax on digital goods such as e-books, streaming music, and movies. Under 86 Ill. Adm. Code 130.2105, electronically downloaded content is a transfer of intangibles outside the ROT and Use Tax, with canned software downloads as the sole taxable exception.
Neither downloaded digital goods (other than prewritten software) nor streamed content is taxed at the Illinois state level, because neither transfers tangible personal property. One Chicago caveat applies: the city taxes streaming entertainment under its separate amusement tax, administered by the Chicago Department of Finance, which is distinct from the PPLTT.
When Does a SaaS Company Have Nexus in Illinois?
You must register and collect when you exceed $100,000 in cumulative gross receipts from Illinois sales, or have physical presence such as employees, offices, inventory, or warehouses. The 200-transaction threshold is repealed effective January 1, 2026, so only the $100,000 test now applies.
| Nexus test | Threshold / status | Effective | Source |
|---|---|---|---|
| Economic (gross receipts) | $100,000 in Illinois sales, 12-month lookback | Current | IDOR Bulletin FY 2026-12 |
| 200-transaction test | Repealed | Jan 1, 2026 | Public Act 104-0006 / IDOR |
| Physical presence | Triggers nexus | Current | IDOR |
Economic nexus covers all Illinois sales, taxable or not. A pure-SaaS seller can cross the $100,000 threshold and owe nothing at the state level while still owing Chicago PPLTT on Chicago use. Even exempt sales can count toward the threshold, so registration may still be required.
What Illinois Sales Tax Exemptions Apply to Software Sales?
Because state-level SaaS is already non-taxable, exemptions mainly matter for taxable prewritten software sales. The two that apply are resale purchases with a valid Illinois resale certificate (Form CRT-61), and qualified nonprofits holding an IDOR exemption identification number.
There is no separate “B2B SaaS exemption” in Illinois; SaaS is non-taxable for every buyer at the state level. For taxable prewritten software, exemption certificate management is the operational burden: you must collect, validate, and retain each certificate, or the exemption fails on audit. Business buyers may also claim resale, which requires the same documentation discipline.
How Do You Register for an Illinois Sales Tax Permit?
Register free through MyTax Illinois using Form REG-1. IDOR issues the account and assigns a filing frequency based on your liability. This is the practical next step once you confirm state nexus.
- Go to MyTax Illinois, the Illinois Department of Revenue’s online portal.
- Complete the online application using the REG-1 form.
- Provide your EIN, business address, and sales estimates.
- Begin tax collection and remittance once your account is active.
When Are Illinois Sales Tax Filings Due?
Illinois sales tax is reported on Form ST-1, with the filing frequency assigned by IDOR based on your liability volume. Deadlines depend on that assigned frequency, and timely filing avoids penalties and interest.
| Filing frequency | Due date | Source |
|---|---|---|
| Monthly | 20th of the following month | IDOR |
| Quarterly | Last day of the month after quarter-end | IDOR |
| Annual | January 20 of the following year | IDOR |
How Commenda Simplifies Illinois SaaS Sales Tax Compliance
Illinois SaaS compliance has two moving parts: a non-taxable state answer and a rising Chicago cloud tax. Commenda’s global indirect tax software tracks your physical and economic nexus across states, handles registrations and filings, and manages exemption certificates, so a SaaS company selling into Illinois and Chicago knows exactly what it owes and when.
Use Commenda’s US nexus guide for state-by-state threshold claims, the Illinois sales tax rates page for state detail, and the sales tax calculator for rate lookups. Commenda also connects to your stack through 100+ ERP, API, and custom integrations, so taxability codes apply automatically across jurisdictions.
Book a demo to get a free assessment of your Illinois and Chicago PPLTT exposure.
