Business formation and registrations cover everything between "I have an idea" and "I can legally hire, invoice and collect tax": choosing the entity, filing it with the state, getting a federal tax ID, registering with Illinois tax agencies and making the right tax elections. Our Aurora, Illinois firm handles the tax and registration side for new U.S. businesses, including founders who live in Canada or India. An attorney should draft any legal agreements, and any filings in Canada or India are made through your Canadian professional or Indian CA.
Who needs business formation and registrations help?
- First-time owners in Aurora, Naperville, Geneva or Oswego opening a shop, clinic, studio or consultancy.
- Professionals leaving employment who want to contract through an LLC.
- Founders from India or Canada who want a U.S. entity to sell, hire or raise funding.
- Existing owners changing entity type, adding a partner or opening a second location.
- U.S. families starting a rental or investment holding entity.
Choosing the structure
The U.S. Small Business Administration summarizes the main options: sole proprietors and general partners are personally liable for business debts, LLC owners are generally not personally liable, and corporations offer the strongest personal liability protection. Tax treatment differs too: LLCs can be taxed as sole proprietorships, partnerships or corporations, C corporations pay their own tax, and S corporations pass income through to owners.
The IRS requires an S corporation to be a domestic corporation with no more than 100 shareholders and one class of stock; shareholders may be individuals, certain trusts and estates, but partnerships, corporations and nonresident aliens are not allowed. Form 2553 must be signed by all shareholders. See LLC versus corporation in Illinois and the U.S. entity types guide.
What gets registered, and where
| Step | Agency | Purpose |
|---|---|---|
| Entity filing | Illinois Secretary of State | Creates the LLC or corporation and records its registered agent |
| EIN | IRS | Federal tax ID; free through the IRS application |
| Illinois tax registration | Illinois Department of Revenue (MyTax Illinois, Form REG-1) | Sales tax, withholding and other state tax accounts |
| Unemployment insurance | IDES | Required for businesses with employees in Illinois |
| Local licenses and zoning | City or village and county | Operating permits, signage, home-occupation rules |
| Assumed name | County clerk | Needed when you operate under a name other than your legal name |
| Tax elections | IRS | S corporation election on Form 2553, or entity classification |
| Beneficial ownership | FinCEN | Not required for U.S.-formed companies after August 14, 2026 |
The Illinois Department of Revenue says to register before you make any purchases, make sales or hire an employee. Online registration through MyTax Illinois usually processes in one to two business days, while mailed forms take weeks. For the IRS, the EIN is free, and you can apply only for one EIN a day. Foreign applicants without a U.S. principal place of business use Form SS-4 by phone, fax or mail. Our guides to starting a business in Illinois and EIN for foreign founders cover each step.
FinCEN states that its final rule, effective August 14, 2026, exempts U.S. companies from beneficial ownership information reporting, so Illinois LLCs and corporations no longer file those reports; check FinCEN's page for the narrow category of foreign companies registered in a U.S. state.
How the engagement works
- Consultation. We discuss what you will do, who owns it, where owners live, and when you plan to sell or hire.
- Written engagement agreement. It sets the scope, the registrations in scope and the fee basis, and you sign it before work begins.
- Document checklist. You provide owner identification, addresses, ownership percentages and the registered-agent choice.
- Preparation. We prepare the EIN and state registration information and the tax-election analysis. Your attorney drafts operating or shareholder agreements.
- Review. You approve the names, ownership and elections before anything is filed.
- Filing. We register with IRS, IDOR and IDES and keep the confirmations; you or your attorney file the Secretary of State documents if you prefer.
- Follow-up. We set a compliance calendar for annual reports, estimated tax and sales tax.
Documents to prepare
- Government ID for each owner and, if available, SSN or ITIN; passports for foreign founders.
- Proposed business name with two alternatives, and a physical Illinois address.
- Ownership percentages, capital contributions and management roles.
- Description of activities, expected hire dates and expected first-year sales.
- Registered agent details and any lease or home-occupation approvals.
- For Canadian or Indian owners: existing company documents and bank details.
Foreign-owned and cross-border setups
| Situation | What changes |
|---|---|
| Single-member LLC owned by a foreign person | Usually needs an EIN and annual reporting on Form 5472; see foreign-owned LLC reporting |
| Canadian or Indian company opening a U.S. subsidiary | Often a C corporation; Forms 5472 and 1120 apply; see U.S. subsidiary forms |
| U.S. founder with a Canadian or Indian company | Foreign-entity reporting such as Forms 5471 or 8858 may follow |
| Incorporating in Canada or India | Done through your Canadian professional or Indian CA; we coordinate the U.S. tax result |
Common situations and fixes
- No S election was filed. We look at late-election relief and the cost of staying a partnership or C corporation.
- Selling before registering. We register now and review exposure for sales made before registration.
- Foreign founder without an SSN. The EIN can still be obtained, but banking and some elections need planning.
- Name conflict or annual report missed. We calendar the Secretary of State report so the entity stays in good standing.
- Home business. Zoning and licensing rules differ by city and county; see our Aurora page.
A worked example
Nisha, a U.S. citizen in Naperville, and Vikram, a nonresident alien in Bengaluru, start a software consultancy. They cannot use an S corporation because Vikram is a nonresident alien. They compare an LLC taxed as a partnership with a C corporation, and choose a C corporation because they expect investors. The order of operations is: attorney drafts the stock agreements, the company files with the Secretary of State, we obtain the EIN, register with IDOR and IDES before the first invoice and payroll, and review timely Section 83(b) elections for founder shares (see startup and equity tax planning). No beneficial ownership report is needed because the company is U.S.-formed.
How we can help
From our Aurora, Illinois office we help new owners across Kane, DuPage, Will and Kendall counties. We handle the U.S. side and coordinate with your Canadian CPA or Indian CA when owners or affiliates sit abroad. Continue with payroll and employer compliance, sales tax and GST compliance and business tax returns and planning. Our full list of services is on the services page.
Frequently asked questions
Should I form an LLC or a corporation?
It depends on liability, tax, investors and owner residency. An LLC is simple; a C corporation fits venture funding; an S corporation fits qualifying U.S. owners. We model the tax result and refer legal drafting to an attorney.
Can a foreign founder own an Illinois LLC?
Yes. Foreign owners can form U.S. entities, and the entity needs an EIN and may have extra annual reporting.
Do I need a local license?
Often yes. Cities, villages and counties license many businesses and regulate home occupations. Check with the local government where you operate.
Do I still file a beneficial ownership report?
FinCEN says U.S. companies are exempt under its final rule effective August 14, 2026. Confirm the current rule on FinCEN's page before relying on this.
Can you incorporate my company in Canada or India?
No. Canadian incorporation goes through a Canadian professional and Indian incorporation through an Indian CA or company secretary. We coordinate the U.S. tax side.
Official sources
- SBA: Choose a business structure
- IRS: Employer ID numbers
- Illinois Department of Revenue: Business registration
- IDES: Unemployment taxes and reporting
- IRS: S corporations
- FinCEN: Beneficial ownership information reporting
This page summarizes public guidance in plain language. If anything here differs from the official source, the official source controls.
General information only. It is not tax, legal, accounting or immigration advice for your situation, and rules change; confirm the current rules with the official source or a licensed professional in the relevant country.