How much does it cost to form a Dentists LLC in Illinois?

The state filing fee in Illinois is $150, plus an annual report fee of $75. A registered agent service adds $100–$300/year. Illinois also imposes 1.5% replacement tax on net income (for S-corps). With FormifyAI, total first-year cost starts at $39/month annual + state fees.

How long does it take to form a Dentists LLC in Illinois?

Illinois processes LLC filings in 5–10 business days for standard filing. Expedited options are available in most states for an additional fee, with same-day or 24-hour turnaround. FormifyAI submits your filing within 24 hours of signup.

What are the state-specific compliance requirements for Dentists LLCs in Illinois?

In Illinois: Annual report $75 due prior to anniversary month. Franchise tax: 1.5% replacement tax on net income (for S-corps). Note: PTET election available to work around SALT cap. FormifyAI tracks your compliance deadlines and sends reminders automatically.

Do Dentists in Illinois need any special licenses?

Beyond standard LLC formation, dentists in Illinois may need industry-specific licenses or permits. Required insurance typically includes Professional liability (malpractice) insurance and General liability insurance. Check with Illinois's Department of Commerce or the relevant state licensing board for your specific trade requirements.

Should I form my Dentists LLC in Illinois or a different state?

For most dentists operating in Illinois, forming locally avoids foreign qualification costs and simplifies compliance. Delaware, Wyoming, or Nevada formation only makes sense if you genuinely operate there. Running a Illinois-based business as a Wyoming LLC typically costs more (both Wyoming fees + Illinois foreign qualification) while providing no real tax benefit.

What type of LLC tax structure is best for a Dentists in Illinois?

By default, a single-member LLC is taxed as a disregarded entity (Schedule C); multi-member as a partnership. Once net profit exceeds ~$80K, an S-Corp election typically saves significantly on self-employment tax. Note that Illinois's franchise tax (1.5% replacement tax on net income (for S-corps)) applies regardless of federal classification. Run the numbers on our S-Corp savings calculator for your specific income level.

2026 GuideDentistsIllinois

Dentists LLC in Illinois

Complete formation guide for dentists launching or relocating to Illinois. State-specific filing requirements, industry liability considerations, tax structure decisions, and ongoing compliance — tailored to your situation.

State filing fee

$150

Processing

5–10d

Annual report

$75

1st year total

~$325

Why Dentists Need an LLC in Illinois

Dental practices face constant malpractice risk from procedures that can cause pain, disfigurement, or infection. HIPAA violations add another layer of liability. A PLLC or LLC protects your personal assets beyond what malpractice insurance covers and provides the legal structure needed to own a practice, hire associates, and build equity.

Industry-Specific Liability Risks

Malpractice claims from botched procedures or infections
HIPAA violations and patient data breaches
Anesthesia complications or allergic reactions
Employee injuries from dental equipment or radiation exposure

Illinois State-Specific Requirements

State income tax: 4.95% flat state income tax
Annual report cadence: Annual report $75 due prior to anniversary month
Franchise tax: 1.5% replacement tax on net income (for S-corps)
Illinois consideration: PTET election available to work around SALT cap

Formation Checklist: Dentists LLC in Illinois

1
File Articles of Organization
Submit to the Illinois Secretary of State with the $150 filing fee. Include your entity name, registered agent, principal office, and management structure.
2
Appoint a Registered Agent in Illinois
Illinois requires a registered agent with a physical address in-state. You can serve as your own agent or hire a commercial service ($100–$300/yr).
3
Get an EIN from the IRS
Free online at irs.gov/ein (instant if you have an SSN/ITIN). Required for business banking, hiring, tax filings, and Stripe/payment processing.
4
File FinCEN Beneficial Ownership Information (BOI) report
Required within 30 days of formation under the Corporate Transparency Act. Free at fincen.gov/boi. Penalty for missing: $591/day civil + criminal.
5
Get Professional liability (malpractice) insurance
Dentists typically need Professional liability (malpractice) insurance, General liability insurance, Workers' compensation insurance. An LLC protects personal assets but doesn't cover business claims — both work together.
6
Set up a business bank account
Use your EIN confirmation (CP-575), Articles of Organization, and Operating Agreement. Keep strict separation from personal finances to preserve the liability shield.
7
Plan for Illinois annual compliance
Annual report $75 due prior to anniversary month

Insurance Stack for Dentists in Illinois

An LLC isolates personal assets from business liability, but does not replace insurance. Dentists in Illinois typically need the following coverage lines:

Professional liability (malpractice) insurance
General liability insurance
Workers' compensation insurance
Cyber liability insurance

Total Cost Summary: Dentists LLC in Illinois

Illinois state filing fee: $150
Registered agent (1st year): $100
EIN application (IRS): Free
Operating agreement: Free (FormifyAI)
BOI report (FinCEN): Free
Year 2+ annual report: $75
State franchise tax: 1.5% replacement tax on net income (for S-corps)
1st year total (excl. franchise): ~$325

Frequently Asked Questions

More about Dentists

More about Illinois

Other industries forming LLCs in Illinois

Ready to form your Dentists LLC in Illinois?

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Back to Dentists LLC overview

Why Dentists Need an LLC in Illinois

Industry-Specific Liability Risks

Malpractice claims from botched procedures or infections
HIPAA violations and patient data breaches
Anesthesia complications or allergic reactions
Employee injuries from dental equipment or radiation exposure

Formation Checklist: Dentists LLC in Illinois

File Articles of Organization

Submit to the Illinois Secretary of State with the $150 filing fee. Include your entity name, registered agent, principal office, and management structure.

Appoint a Registered Agent in Illinois

Illinois requires a registered agent with a physical address in-state. You can serve as your own agent or hire a commercial service ($100–$300/yr).

Get an EIN from the IRS

Free online at irs.gov/ein (instant if you have an SSN/ITIN). Required for business banking, hiring, tax filings, and Stripe/payment processing.

File FinCEN Beneficial Ownership Information (BOI) report

Required within 30 days of formation under the Corporate Transparency Act. Free at fincen.gov/boi. Penalty for missing: $591/day civil + criminal.

Get Professional liability (malpractice) insurance

Dentists typically need Professional liability (malpractice) insurance, General liability insurance, Workers' compensation insurance. An LLC protects personal assets but doesn't cover business claims — both work together.

Set up a business bank account

Use your EIN confirmation (CP-575), Articles of Organization, and Operating Agreement. Keep strict separation from personal finances to preserve the liability shield.

Plan for Illinois annual compliance

Annual report $75 due prior to anniversary month

Frequently Asked Questions