Delaware vs Illinois LLC 2026: Formation Costs, Taxes & Compliance Compared
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Introduction: Quick Verdict and Key Differentiator
Delaware costs more upfront ($110 filing fee + $300 annual tax) but offers stronger privacy protections and charging order protection. Illinois is cheaper annually ($75 annual report) but requires more detailed public disclosures and imposes higher income tax on pass-through entities (4.95% individual + 1.5% replacement tax vs. Delaware's graduated 2.2%–6.6% personal income tax).
The key differentiator: Delaware allows anonymous LLCs—your Certificate of Formation discloses only the entity name and registered agent, not member names (6 Del. C. § 18-102). Illinois requires all managers and members with authority to appear in public filings (805 ILCS 180/1-10). If privacy is your priority, Delaware wins. If you want the lowest annual compliance cost, Illinois edges ahead.
| Dimension | Delaware | Illinois |
|---|---|---|
| Formation Fee | $110 (6 Del. C. § 18-201) | $150 (805 ILCS 180/5-5) |
| Annual Compliance Cost | $300 franchise tax + gross receipts tax (0.0945%–1.9914%) | $75 annual report only |
| Processing Time (Standard) | 2–3 business days | ~10 business days |
| Anonymous LLC | Yes (6 Del. C. § 18-102) | No (805 ILCS 180/1-10) |
| Series LLC | Yes (6 Del. C. §§ 18-215, 18-218) | Yes (805 ILCS 180/37-40) |
| State Income Tax on LLC | 2.2%–6.6% graduated (passed through) | 4.95% flat + 1.5% replacement tax |
| Registered Agent Requirement | Delaware resident or authorized entity (6 Del. C. § 18-104) | Illinois resident or authorized entity (805 ILCS 180/1-35) |
| Operating Agreement Required | No (6 Del. C. § 18-101(9)) | No (805 ILCS 180/15-5) |
| Dissolution Filing Fee | $220 (6 Del. C. §§ 18-801–18-806) | $5 (805 ILCS 180/35-15) |
| Late Annual Report Penalty | $200 + 1.5%/month interest; auto-dissolution after 3 years unpaid (6 Del. C. § 18-1108) | $100 after 60 days; admin dissolution after 120 days (805 ILCS 180/50-1) |
Winner by dimension: Delaware dominates privacy and asset protection; Illinois dominates affordability and straightforward compliance.
Frequently Asked Questions
How much does it cost to form an LLC in Delaware vs Illinois?
Delaware's filing fee is $110 (6 Del. C. § 18-201), while Illinois charges $150 (805 ILCS 180/5-5). Delaware saves you $40 on standard formation. Both states allow online filing through their Secretary of State portals. Standard processing takes 2–3 business days in Delaware versus approximately 10 business days in Illinois.
If you need faster processing, Delaware offers expedited options: 24-hour service adds $50, while Illinois's 24-hour service adds $100. Delaware's 1-hour expedited option costs an additional $1,000, making it $1,110 total—expensive but fastest available.
| Cost Element | Delaware | Illinois |
|---|---|---|
| Standard Filing Fee | $110.00 | $150.00 |
| Expedited Fee (24-hour) | +$50.00 | +$100.00 |
| Name Reservation (120 days) | $75.00 | $25.00 |
| Registered Agent Change | $50.00 | $25.00 |
| Savings: Delaware | $40 formation + $50 agent change | — |
Delaware wins on formation cost. You save $40 on the initial filing and $50 on registered agent changes. Illinois's name reservation is $50 cheaper ($25 vs. $75), but Delaware's faster processing (2–3 days vs. 10 days) justifies the formation fee difference for time-sensitive businesses.
What are the annual compliance costs and deadlines?
Delaware requires a $300 annual tax payment due June 1 each year (6 Del. C. § 18-1107), with a $200 penalty plus 1.5% monthly interest if unpaid. Illinois requires a $75 annual report due before the first day of your LLC's anniversary month (805 ILCS 180/50-1), with a $100 penalty if filed more than 60 days late.
Delaware's annual obligation is nearly four times higher ($300 vs. $75). However, Delaware's June 1 deadline is fixed, while Illinois's anniversary-month deadline varies by formation date. Both states dissolve your LLC for non-payment, but Illinois acts faster: administrative dissolution occurs after 120 days of delinquency (805 ILCS 180/50-1), while Delaware requires 3 consecutive years of unpaid taxes (6 Del. C. § 18-1108).
| Annual Requirement | Delaware | Illinois |
|---|---|---|
| Annual Tax/Report Fee | $300.00 | $75.00 |
| Late Penalty | $200 + 1.5%/month interest | $100.00 |
| Grace Period Before Penalty | 0 days | 60 days |
| Due Date | June 1 (fixed) | Anniversary month, first day (variable) |
| Dissolution Timeline | 3 years unpaid | 120 days delinquent |
| Winner | Illinois | — |
Illinois wins decisively. You pay $225 less annually. Illinois grants a 60-day grace period before penalties apply, and you have 120 days of delinquency before administrative dissolution. Delaware's zero-day grace period and automatic dissolution after 3 years create higher compliance risk.
Which state has lower income taxes for LLC owners?
Delaware applies graduated personal income tax (2.2%–6.6%) to LLC income passed through to members, plus a $300 annual franchise tax (6 Del. C. § 18-1107). Illinois taxes individual income at 4.95% flat rate (35 ILCS 5/101), with LLCs owing 1.5% replacement tax on Illinois-taxable income (35 ILCS 5/1501).
For a single-member LLC earning $50,000 in Delaware-source income, Delaware's graduated rate (approximately 3.2% on the first $50,000) plus $300 franchise tax equals roughly $1,900 total state tax. The same LLC in Illinois pays $2,475 (4.95% + 1.5% = 6.45% × $50,000). Delaware wins on this scenario.
However, Delaware's advantage disappears if your LLC earns income outside Delaware. Delaware taxes only Delaware-source income (6 Del. C. § 4001), while Illinois taxes all income of Illinois residents and all Illinois-source income regardless of owner residence (35 ILCS 5/101). For remote-work LLCs or service businesses operating nationwide, Delaware's territorial tax system is superior.
| Tax Type | Delaware | Illinois |
|---|---|---|
| Personal Income Tax Rate | 2.2%–6.6% graduated (passed-through) | 4.95% flat (passed-through) |
| Franchise Tax | $300 annual flat | None |
| Replacement Tax | Not applicable | 1.5% on Illinois-taxable income |
| Income Earned Outside State | $0 tax (territorial system) | Subject to Illinois tax if owner is resident |
| Series LLC Tax | +$75 per registered series | Included in standard rate |
| Winner | Delaware (for non-DE income) | — |
Delaware wins for pass-through taxation if you operate outside Delaware. Illinois's flat 4.95% rate applies to all income regardless of source (if you're an Illinois resident), plus 1.5% replacement tax. Delaware's territorial tax system exempts out-of-state income entirely. However, Illinois imposes no franchise tax, while Delaware's $300 annual franchise tax adds significant cost.
Do I need an operating agreement?
Neither state legally requires a written operating agreement. Delaware's statute (6 Del. C. § 18-101(9)) states the LLC agreement "may be in writing or oral." Illinois similarly allows oral agreements (805 ILCS 180/15-5). However, both states apply statutory default provisions if you don't have a written agreement, and those defaults may not match your intentions.
Delaware defaults to member-managed structure with equal profit/loss sharing unless modified (6 Del. C. § 18-1101(b)). Illinois defaults to member management with profit/loss sharing per the operating agreement or, if absent, per capital contributions (805 ILCS 180/15-5). Delaware's statute grants maximum freedom of contract (§ 18-1101(b)), allowing you to override nearly all default rules.
| Operating Agreement Element | Delaware | Illinois |
|---|---|---|
| Written Agreement Required | No (6 Del. C. § 18-101(9)) | No (805 ILCS 180/15-5) |
| Default Management | Member-managed | Member-managed |
| Default Profit/Loss Split | Equal among members | Per capital contributions |
| Statute of Frauds Applies | No | No |
| Freedom to Contract | Maximum (§ 18-1101(b)) | Broad (805 ILCS 180/15-5) |
| Winner | Tie | — |
Both states tie. Neither requires a written agreement, both default to member management, and both prioritize contractual freedom. You should draft an operating agreement in either state to clarify member rights, specify profit/loss allocation, define manager duties, and establish dispute resolution procedures. A written agreement prevents costly litigation over statutory defaults.
Can I form an LLC with one member?
Both states allow single-member LLCs. Delaware requires only an entity name, Delaware registered office address, and registered agent name (6 Del. C. § 18-201). Illinois requires the same plus principal place of business, effective date, organizer information, and LLC purpose (805 ILCS 180/5-5).
Both recognize single-member LLCs as disregarded entities for federal tax purposes, meaning you report LLC income on Schedule C (Form 1040) as self-employment income. This simplifies federal filing compared to multi-member LLCs, which file Form 1065 (partnership return).
| Single-Member Requirement | Delaware | Illinois |