Fictitious Business Name vs LLC in Illinois
Choosing between a Fictitious Business Name and an LLC is one of the first decisions new business owners in Illinois face. They serve different purposes, and in some cases you may need both.
Quick Comparison
| Feature | Fictitious Business Name (DBA) | LLC | Sole Proprietorship |
|---|---|---|---|
| Liability protection | No | Yes | No |
| Separate legal entity | No | Yes | No |
| Business name registration | Yes | Yes (entity name) | Uses your legal name |
| Cost to file | $99 + filing fee | Higher (state formation fee) | No filing needed |
| Ongoing requirements | Periodic renewal | Annual report (in most states) | Minimal |
| Tax flexibility | No | Yes (choose tax treatment) | No |
| Complexity | Low | Moderate | Very low |
What Is a Fictitious Business Name?
A Fictitious Business Name — called a "Doing Business As" or DBA in most states — is simply a business name registration. It lets you operate under a name other than your legal name. A Fictitious Business Name does not create a new legal entity and does not provide liability protection.
In Illinois, this filing is officially known as a Fictitious Business Name registration.
What Is an LLC?
An LLC (Limited Liability Company) is a legal business entity registered with the Illinois Secretary of State. It creates a separate legal structure that provides personal liability protection — meaning your personal assets (home, savings, car) are generally protected if the business is sued or incurs debt.
When to Use a Fictitious Business Name
A Fictitious Business Name makes sense when:
- You're a sole proprietor or partnership and want a professional business name
- You already have an LLC or corporation but want to operate under an additional name
- You want a low-cost, simple way to start doing business under a brand name
- Liability protection is not a primary concern (or you have insurance covering your risk)
- You're testing a business idea and want to keep startup costs minimal
When to Form an LLC
An LLC makes sense when:
- You want personal liability protection for your assets
- You plan to take on debt, sign contracts, or work in a field with lawsuit risk
- You want tax flexibility (LLCs can elect different tax treatments)
- You're building a business you intend to grow long-term
- You want the credibility that comes with a formal business entity
Can You Have Both?
Yes. Many business owners in Illinois form an LLC and then file a Fictitious Business Name so the LLC can operate under a different name. For example, if your LLC is registered as "Smith Holdings LLC" but you want to do business as "Smith Consulting," you'd file a Fictitious Business Name for the alternate name.
Cost Comparison in Illinois
- Fictitious Business Name filing: $99 service fee + filing fee — simple paperwork, usually processed in days
- LLC formation: Higher cost (state filing fee typically $50-$500 depending on the state) — more paperwork, more ongoing requirements
Bottom Line
If you just need a business name and want to keep things simple, a Fictitious Business Name is the right choice. If you need liability protection and want a formal business structure, form an LLC. And if you want both a formal entity and a different operating name, you can do both.