Illinois vs. Delaware LLC Formation — 2026 Cost & Requirements Comparison

1. Compare formation costs: IL $150 vs. DE $90 Delaware has a lower formation fee ($90 vs. $150). However, Illinois's $75/yr Annual Report is dramatically cheaper than Delaware's $300/yr flat Annual LLC Tax. Over 3 years: Illinois ~$375 ($150 + 3×$75) vs. Delaware ~$990 ($90 + 3×$300). For an Illinois-based small business with no outside investors, Illinois costs less than half of Delaware over three years — and the gap widens over time.
2. Understand the true annual obligation gap: IL $75/yr vs. DE $300/yr Illinois requires an Annual Report ($75) due before the LLC's anniversary month each year. Delaware charges a flat $300 Annual LLC Tax every June 1 regardless of revenue. The $225/yr difference means Illinois costs $2,250 less over 10 years in annual fees alone. For a Chicago freelancer or small-business owner, Delaware's $300/yr Annual LLC Tax is pure overhead with no operational benefit.
3. Understand Delaware's Court of Chancery advantage — and when it matters Delaware's primary structural advantage is its Court of Chancery — a dedicated business court with specialist judges (chancellors) and no juries. Over a century of LLC and corporate case law makes governance disputes highly predictable. This matters for venture-backed startups, complex multi-entity structures, and companies expecting institutional investor scrutiny. For a sole proprietor or small operating business in Illinois, this advantage almost never applies and does not justify the $225/yr cost premium.
4. Factor in the foreign qualification cost for Illinois-based operators who form in DE Illinois-based business owners who form in Delaware face an immediate problem: Illinois requires foreign qualification for any out-of-state LLC operating in Illinois ($150 one-time + $75/yr Annual Report). You then pay both Delaware's $300/yr Annual LLC Tax and Illinois's $75/yr Annual Report — a combined $375/yr in annual state fees versus just $75/yr if you had formed in Illinois. The dual-state overhead eliminates any formation-fee advantage by year two.
5. Evaluate income tax implications Illinois imposes a flat 4.95% individual income tax on LLC members' pass-through income — this applies regardless of whether your LLC is formed in Illinois or Delaware. Illinois residents are taxed on all income, and forming in Delaware does not change the state in which you owe income tax. Delaware imposes no personal income tax. The 4.95% flat rate applies uniformly to all IL-resident LLC members, making the state of formation irrelevant to the income tax burden for most IL founders.
6. Consider Chicago sales tax overlay and local factors Chicago and Cook County businesses face a combined state and local sales tax rate of up to 10.25% in the city of Chicago — the highest in the country among major cities. This applies based on where business is conducted, not where the LLC is formed. Chicago-based businesses forming in Delaware still collect and remit Illinois and Chicago sales taxes on Illinois-sourced transactions. Formation state does not reduce local tax obligations.
7. Evaluate privacy and registered agent requirements Delaware's Certificate of Formation requires only the LLC name and RA information — member names and addresses are not part of the public record. Illinois's SOSDirect public record includes member/manager names. Delaware requires a DE-address registered agent, which means a commercial RA service ($50–$150/yr) for most out-of-state owners. Illinois permits self-service RA for in-state residents (though using a home address puts it on the public record).
8. Consider Series LLC and choose your state Delaware natively supports Series LLCs under its LLC Act (6 Del. C. § 18-215), allowing a single LLC to maintain legally separate sub-series for isolating liability among different assets or business lines. Illinois also authorizes Series LLCs (805 ILCS 180/37-40), so this is not a Delaware-exclusive advantage. For most Illinois-based operating businesses — freelancers, contractors, small businesses, and real estate investors — forming in Illinois is simpler, cheaper, and logistically correct. Delaware is warranted only when institutional investors require it.

Illinois Limited Liability Company Act, 805 ILCS 180/1-1 et seq.; Delaware Limited Liability Company Act, 6 Del. C. § 18-101 et seq.; Delaware Annual LLC Tax: 30 Del. C. § 502(b); IRS guidance on single-member LLC disregarded entity treatment.

FAQ

Illinois vs. Delaware LLC — common questions