Illinois has two tax-exempt forms most people are looking for, and which one you need depends on who you are. Nonprofits, religious organizations, schools, and government bodies use Form STAX-1 to apply for a permanent sales tax exemption number, known as an E-number. Retailers use Form CRT-61, a certificate of resale, when buying inventory they plan to sell to customers. The state’s base sales tax rate is 6.25%, so getting the right form in the right hands matters. This is the short guide to both.
Who Qualifies to Apply on Form STAX-1
Illinois exempts organizations that are organized and operated exclusively for charitable, religious, or educational purposes, along with governmental bodies at every level.1Illinois General Assembly. 35 ILCS 120/2-5 – Exemptions The word “exclusively” does real work. Being incorporated as a nonprofit is not enough; the Department of Revenue looks at what the organization actually does day to day and whether those activities match the stated charitable, religious, or educational purpose.2Legal Information Institute. Illinois Administrative Code tit 86, Section 130.2005 – Persons Engaged in Nonprofit Service Enterprises
The statute also reaches not-for-profit arts and cultural organizations with federal 501(c)(3) status, nonprofit groups serving people 65 and older, volunteer-run recreation organizations for people 55 and older that have no paid officers or employees, and county fair associations buying property for fair operations.1Illinois General Assembly. 35 ILCS 120/2-5 – Exemptions None of them can make a tax-free purchase, however, until the state has issued them an active E-number.
An organization that operates primarily for profit, or that lets net earnings benefit a private individual, will be denied. Groups that blur charitable work with commercial activity are the ones that stall in review.
How to File Form STAX-1
The Application for Sales Tax Exemption is Form STAX-1. The fastest route is filing through MyTax Illinois, which does not require you to create an account.3Illinois Department of Revenue. Application for Sales Tax Exemption To file on paper, download the form from the Department of Revenue’s website and mail the packet to:
Exemption Section MC 3-520
Illinois Department of Revenue
101 West Jefferson Street
Springfield, IL 627024Illinois Department of Revenue. Illinois Department of Revenue Application for Sales Tax Exemption
On the form itself, use your organization’s complete legal name (no abbreviations), legal address, and Federal Employer Identification Number.4Illinois Department of Revenue. Illinois Department of Revenue Application for Sales Tax Exemption You also write a narrative describing your organization’s activities. This is where most applications stall. Vague or overly broad purpose statements draw follow-up questions. Be specific about what the organization does and how those activities serve a charitable, religious, or educational goal.
Documents to Attach
Every applicant except a governmental body must submit:
- Articles of incorporation, or a constitution if the group is unincorporated
- Bylaws
- The IRS determination letter regarding federal tax-exempt status, if you have one
- The most recent financial statement (bank statements are not accepted; religious organizations are excused from this requirement)
These verify the nonprofit structure and the exempt purpose.4Illinois Department of Revenue. Illinois Department of Revenue Application for Sales Tax Exemption Newly formed groups without a financial track record may need to submit a proposed budget showing where funding will come from. Every name, address, and FEIN on the form should match what appears in the supporting documents. Mismatches cause delays.
Review takes several weeks to a few months. If the state approves, it issues a certificate carrying your unique E-number. That certificate is your proof of tax-exempt status for future Illinois purchases.5Illinois Department of Revenue. How Does a Qualified Organization Apply for a Tax-Exempt E Number
A 501(c)(3) Letter Is Not Enough on Its Own
The STAX-1 form itself warns that “exemption from federal income taxes under section 501(c)(3) does not automatically grant your organization tax exempt status under Illinois law.”4Illinois Department of Revenue. Illinois Department of Revenue Application for Sales Tax Exemption The IRS and the Illinois Department of Revenue apply different standards. An organization that clears the federal test can still be denied at the state level if Illinois concludes it does not operate exclusively for a qualifying purpose. You need both approvals independently. The federal letter helps as supporting evidence; it is not a shortcut.
Renewing the E-Number
An E-number is not permanent in the sense of never being touched again. The Department of Revenue requires periodic renewal, using the same STAX-1 form and essentially the same package: articles of incorporation or constitution, bylaws, IRS determination letter, a brief narrative of purpose, the most recent financial statement, and a copy of your current exemption letter showing the E-number.6Illinois Department of Revenue. How Do I Reinstate or Renew My Tax-Exempt E Number
Filing through MyTax Illinois is faster; you scan and attach the documents. Otherwise mail the packet to the Springfield address used for the initial application.6Illinois Department of Revenue. How Do I Reinstate or Renew My Tax-Exempt E Number If your organization’s name or address has changed since the last filing, flag that in a cover letter. Letting an E-number lapse means you cannot make tax-free purchases until it is reinstated, even if you still meet every substantive requirement.
What Form CRT-61 Does
Form CRT-61, the Certificate of Resale, is a different tool for a different situation. Where an E-number exempts a qualifying organization from sales tax permanently, CRT-61 lets a business defer sales tax on items it buys specifically to resell.7Illinois Department of Revenue. CRT-61 Certificate of Resale Tax is still owed; it just gets collected later, when the item reaches the final consumer. A hardware store buying lumber it plans to sell would hand its supplier a CRT-61 so no sales tax is charged on the wholesale purchase.
The form requires:
- The seller’s name and mailing address
- The purchaser’s name, address, and active Illinois retailer or reseller account ID number
- A description of the property being bought for resale
- The signature of the purchaser or an authorized representative, and the date8Legal Information Institute. Illinois Administrative Code tit 86, Section 130.1405 – Sellers Responsibility to Obtain Certificates of Resale
You give the completed certificate directly to the seller at the time of purchase. CRT-61 is not filed with the Department of Revenue. The seller is responsible for verifying that the purchaser’s account ID number is valid and active before accepting it.9Illinois Department of Revenue. CRT-61 Certificate of Resale Instructions If your business operates from multiple locations, put the address of the specific branch making the purchase on the form.
One common misuse: presenting a CRT-61 for supplies your business will consume itself. Cleaning products, office supplies, tools used in-house—those are taxable purchases even if you hold a resale number. The certificate only covers items that will physically leave your business in the hands of a customer.
Blanket Certificates
If your business buys from the same supplier repeatedly, you do not need a new CRT-61 for every transaction. A blanket certificate covers all resale purchases from that seller on an ongoing basis, and a percentage blanket certificate works when only a known share of purchases from a vendor will be resold.8Legal Information Institute. Illinois Administrative Code tit 86, Section 130.1405 – Sellers Responsibility to Obtain Certificates of Resale Leaving the “single purchase” box unchecked on the form is what signals a blanket certificate.
Update blanket certificates at least once every three years.9Illinois Department of Revenue. CRT-61 Certificate of Resale Instructions If the percentage designated for resale changes, issue a new one right away rather than waiting for the three-year mark.
Recordkeeping
Sellers must keep every Certificate of Resale on file for at least three and a half years.9Illinois Department of Revenue. CRT-61 Certificate of Resale Instructions The Department of Revenue can audit those records at any point in that window, and a seller who cannot produce a valid certificate for a transaction will be assessed the unpaid tax plus penalties.10Illinois Department of Revenue. What Must I Keep in My Books and Records Purchasers should keep their own copies too. Either the certificate existed at the time of sale or it did not; the paperwork cannot be reconstructed after an auditor questions the transaction.
Penalties for Misusing Either Form
Illinois treats abuse of tax-exempt or resale documentation as a criminal matter, not just a tax dispute. A purchaser who obtains a registration number through misrepresentation, claims to hold one without doing so, or uses a valid registration number to buy items known not to be for resale commits a Class 4 felony.11Illinois General Assembly. 35 ILCS 120/13 On top of the criminal exposure, the Department will assess unpaid tax, interest, and penalties on every improperly exempted transaction it identifies.
The exposure runs both directions. A seller who knowingly participates in sham resale transactions carries its own liability. Verifying certificates should be part of the routine on every tax-free sale, not something to worry about only when an audit letter arrives.