LLC vs General Partnership in Illinois (2026)
This comparison focuses on Illinois-specific formation costs, tax treatment, liability rules, and compliance obligations so you can choose between LLC and General Partnership with current state-specific context.
FAQ: Three Practical Comparison Questions
FAQ: Three Practical Comparison Questions for LLC vs General Partnership in Illinois
Question 1: What are the actual formation costs and timelines?
An Illinois LLC costs $150 to file Articles of Organization with standard 10 business day processing, or $250 total with 24-hour expedited service (805 ILCS 180/5-5). A general partnership requires no state filing fee—you simply operate under partnership law (805 ILCS 206/ and 805 ILCS 215/). However, if you use a business name other than partners' legal names, you must file a DBA for $120 with the Illinois Secretary of State. The LLC requires ongoing annual reports ($75 annually, due before your anniversary month), while partnerships have no state annual filing requirement.
| Cost Category | LLC | General Partnership |
|---|---|---|
| Formation Filing | $150 | $0 |
| Expedited Formation | $250 (24-hour) | N/A |
| DBA Filing (if needed) | $120 | $120 |
| Annual Report | $75/year | $0 |
| Registered Agent Change | $25 | N/A |
| Total Year 1 | $225–$370 | $0–$120 |
Winner for cost: General Partnership — You avoid the $150 formation fee and $75 annual reporting requirement indefinitely.
Question 2: What liability protection do you actually get?
An LLC provides statutory liability protection under 805 ILCS 180/. Members are not personally liable for company debts or other members' negligence—creditors can only pursue LLC assets. A general partnership offers zero liability protection. You and your partners are jointly and severally liable for all partnership debts and each partner's negligent acts (805 ILCS 206/). If a partnership client sues, creditors can seize your personal bank accounts, home, and wages.
| Protection Type | LLC | General Partnership |
|---|---|---|
| Personal liability shield | Yes | No |
| Creditor access to personal assets | No | Yes |
| Partner liable for co-partner negligence | No | Yes |
| Statute | 805 ILCS 180/ | 805 ILCS 206/ |
Winner for liability: LLC — You keep personal assets protected; partnerships expose all partners to unlimited personal liability.
Question 3: What are the tax differences in Illinois?
Illinois taxes LLC members and general partners differently. An LLC taxed as a partnership pays no Illinois income tax on the entity itself; instead, members report their share on personal returns at 4.95% individual income tax (35 ILCS 5/). However, the LLC owes 1.5% replacement tax on Illinois-taxable income. A general partnership also pays no entity-level income tax and owes the same 1.5% replacement tax. Both pass income to owners' personal returns at 4.95%. The key difference: an LLC can elect S-corp or C-corp taxation; a partnership cannot. An S-corp election can reduce self-employment tax on distributions.
| Tax Item | LLC (Partnership Taxed) | General Partnership |
|---|---|---|
| Entity-level income tax | No | No |
| Replacement tax (1.5%) | Yes | Yes |
| Owner income tax rate | 4.95% | 4.95% |
| Self-employment tax on all income | Yes | Yes |
| S-corp election available | Yes | No |
| Tax authority | Illinois Department of Revenue | Illinois Department of Revenue |
Winner for tax flexibility: LLC — You can elect S-corp status to reduce self-employment tax; partnerships cannot.
Side-by-Side Comparison Table
LLC vs General Partnership in Illinois
Side-by-Side Comparison Table
| Feature | LLC | General Partnership |
|---|---|---|
| Formation Filing | Articles of Organization to Illinois Secretary of State (805 ILCS 180/5-5) | No state filing required; governed by 805 ILCS 206/ and 805 ILCS 215/ |
| Filing Fee | $150.00 (805 ILCS 180/5-40) | $0.00 |
| Expedited Filing | $100.00 additional for 24-hour processing | Not applicable |
| Processing Time | ~10 business days standard | Immediate upon agreement |
| Minimum Members | 1 (805 ILCS 180/5-5) | 2 or more partners required |
| Registered Agent Required | Yes; must be Illinois resident or authorized business entity (805 ILCS 180/1-35) | No |
| Registered Agent Address | Physical Illinois address required (805 ILCS 180/1-50) | Not applicable |
| Operating Agreement | Not legally required but recommended (805 ILCS 180/15-5) | Not legally required but recommended |
| Annual Report | Required; $75.00 fee due before anniversary month (805 ILCS 180/50-1) | Not required |
| Late Annual Report Penalty | $100.00 if filed after 60-day grace period (805 ILCS 180/50-5) | Not applicable |
| Dissolution Filing | Statement of Termination; $5.00 fee (805 ILCS 180/35-15) | Dissolution by agreement; no state filing fee |
| Personal Liability Protection | Yes; members not personally liable for company debts (805 ILCS 180/) | No; partners personally liable for partnership debts and partner negligence |
| Illinois Income Tax | 1.5% replacement tax on Illinois-taxable income (35 ILCS 5/) | 1.5% replacement tax on Illinois-taxable income (35 ILCS 5/) |
| Self-Employment Tax | Yes, applies to member distributions | Yes, applies to all partnership income |
| Federal Tax Treatment (Multi-Member Default) | Partnership (Form 1065) | Partnership (Form 1065) |
| Federal Tax Treatment (Single-Member Default) | Disregarded entity (Schedule C) | Not applicable |
| S-Corp Election | Available | Available |
| C-Corp Election | Available | Available |
| DBA Filing | Required if using assumed name; $120.00 fee | Required if using assumed name; $120.00 fee |
| Name Reservation | Available; $25.00 for 90 days (805 ILCS 180/1-10) | Not available |
| Series LLC Available | Yes (805 ILCS 180/37-40) | Not applicable |
| Professional LLC Available | Yes (805 ILCS 185/) | Professional partnership available |
Formation Process and Costs
An LLC requires you to file Articles of Organization with the Illinois Secretary of State and pay a $150.00 filing fee, while a general partnership requires no state filing and costs nothing to form. You can file your LLC online at https://apps.ilsos.gov/llcarticles/index.jsp with standard processing in approximately 10 business days, or pay an additional $100.00 for 24-hour expedited service. A general partnership forms automatically when two or more people agree to conduct business together under 805 ILCS 206/ and 805 ILCS 215/.
Which is better for this dimension: General Partnership (no filing fees or administrative requirements).
Liability Protection
An LLC provides personal liability protection—members are not personally liable for company debts or obligations under 805 ILCS 180/. A general partnership offers no liability shield; each partner faces personal liability for partnership debts and for the negligence or misconduct of other partners. This means your personal assets remain at risk in a partnership if the business faces lawsuits or creditor claims.
Which is better for this dimension: LLC (statutory liability protection under 805 ILCS 180/).
Registered Agent and Compliance
An LLC must maintain a registered agent who is either an Illinois resident or a business entity authorized to conduct business in Illinois, with a physical Illinois address on file (805 ILCS 180/1-35 and 805 ILCS 180/1-50). You can change your registered agent by filing a Statement of Change of Registered Agent and/or Registered Office for $25.00. A general partnership has no registered agent requirement and no ongoing compliance filings.
Which is better for this dimension: General Partnership (no registered agent requirement).
Annual Reporting and Maintenance
You must file an annual report for your Illinois LLC before the first day of your anniversary month each year, paying a $75.00 fee (805 ILCS 180/50-1). If you miss the deadline, you face a $100.00 penalty after 60 days, and administrative dissolution or revocation occurs if the report remains unfiled 120 days past the due date (805 ILCS 180/50-5). Reinstatement costs $200.00 plus all delinquent fees. A general partnership has no annual reporting requirement.
Which is better for this dimension: General Partnership (no annual reporting or penalties).
Operating Agreement
Neither an LLC nor a general partnership requires a written operating agreement under Illinois law. For an LLC, the default rules in 805 ILCS 180/15-5 apply if you don't have an agreement—the company is member-managed unless the agreement states otherwise, and the agreement may modify most statutory rules. For a partnership, default rules under 805 ILCS 206/ and 805 ILCS 215/ apply, including equal profit sharing and
Bottom Line
In Illinois, the better choice depends on your ownership, liability, tax, and mission requirements. Review the sections above against your actual business model before filing.