How Much Does It Cost to Start a Business in Illinois? (Lawyer vs DIY vs Online)
Starting an LLC in Illinois is one of the smartest first steps for any entrepreneur. But there’s one question almost everyone asks: How much does it actually cost?
The answer? It depends on whether you file it yourself, use an online service, or hire a lawyer. And while the upfront price tag matters, the real cost is about whether your LLC truly protects you.
State Filing Fees in Illinois
As of 2025, the filing fee to start an LLC in Illinois is $150. This covers only the paperwork with the Secretary of State.
Here here’s the catch:
The fee doesn’t include an Operating Agreement (essential for protection).
It doesn’t cover contracts, tax structure, or local legal compliance.
If you make a mistake, you may pay much more to fix it later.
Option 1: DIY Filing
Cost $150 (filing fee only)
Pro: Cheapest upfront.
Con: No guidance, no customized local Operating Agreement, high risk of missing legal protections.
Option 2: Online Filing Services
Cost: $0-$400+ (plus the $150 filing fee).
Pro: They look simple and fast.
Cons: Lots of hidden upsell costs (annual fees, registered agent, templates). Documents are generic and rarely enforceable under Illinois law.
Option 3: Hiring a Business Lawyer
Cost: Custom to your specific business needs.
Pro: Full personalized legal protection, custom Operating Agreement, tailored contracts, and legal guidance to keep your business safe long term.
Cons: Up front investment compared to DIY or online services, but it’s a smart investment that can prevent costly mistakes down the road.
At Marketti Law Firm, we focus on building your business on a firm legal foundation—not just filing paperwork. That means you walk away with an LLC that actually protects you, your assets, your family and your future growth.
Why Paying More Upfront Saves You Money Later
Here’s what business owners often don’t realize:
Fixing a generic contract can cost thousands of dollars later.
Tax mistakes add up over years.
A legal business dispute in court can cost $10,000-$100,000+ and can destroy your business.
Ready to form your LLC the right way? Schedule your free consultation today here and legally protect your business now.