State guide — Illinois

Incorporate a nonprofit in Illinois

State facts checked against Illinois official sources — October 2026

Illinois holds the sharpest trap in this entire guide series: its online articles form cannot add additional provisions — which means the 501(c)(3) clauses cannot be inserted online at all. Illinois founders who file online incorporate a shell the IRS will send back. The paper form is the correct route, and the $50 fee is printed right on it.

The steps

1. Choose a name and confirm it is available in Illinois — and distinguishable from existing entities in the filing office's records.
2. Line up your agent: registered agent and registered office in Illinois.
3. Draft the articles with the 501(c)(3) clauses in them — see the language section below. This is the step that decides whether the IRS accepts your application months from now.
4. File with Secretary of State and pay the state fee. File the paper form with the Department of Business Services in Springfield, and keep the file-stamped copy for Pay.gov — the IRS application requires your organizing document as filed.
5. Get the EIN — free from the IRS once the corporation exists. The EIN guide covers the traps.
6. Run the eligibility checker and file Form 1023-EZ or Form 1023 on Pay.gov. Then handle Illinois charity registration (below) before you fundraise.

The 501(c)(3) language in Illinois

Illinois articles pick a purpose from the statutory purposes in the Act, and the IRS language — purpose limitation and dissolution dedication — goes in as additional provisions (Article 5). The state's online filing flow has no way to add those provisions. File Form NFP 102.10 on paper with the provisions included. Note the paper form's payment restrictions: cashier's or certified check, money order, or a check from an Illinois attorney or CPA.

The federal requirement underneath all of this is the organizational test: your organizing document must limit the organization to exempt purposes and permanently dedicate its assets to exempt purposes on dissolution. The IRS publishes sample wording — a purpose clause and a dissolution clause — and the kit's generator builds both into your articles automatically.

Illinois traps and notes

• Do not file online if you need 501(c)(3) language — the online form structurally cannot hold it. This single fact is worth the price of any guide.
• Payment friction on paper filings: personal checks are not accepted for this form — plan the cashier's check or money order in advance.
• Illinois charity registration is separate (Attorney General, below) — incorporation with the Secretary of State does not cover it.

After incorporation: Illinois charitable solicitation registration

Status: Required. Regulator: Attorney General — Charitable Trust Bureau.

Illinois charitable organizations register with the Attorney General's Charitable Trust Bureau and file annual reports (the AG990-IL). Registration belongs in the formation sequence, before fundraising begins.

The national picture — which states require registration, which don't, and the exemptions that actually apply — is in our guide to charitable solicitation registration.