How to Start an LLC in Illinois

To start an LLC in Illinois, file Articles of Organization (Form LLC-5.5) with the Illinois Secretary of State for a $150 filing fee, appoint a registered agent with a physical Illinois address, and choose a compliant business name. Online filings are typically processed within a few business days; mailed filings take longer. After approval you get an EIN from the IRS, open a business bank account, and file the Annual Report ($75) each year to stay in good standing. That is the whole legal skeleton. The part most guides skip is what happens next: an LLC on paper cannot pay for inventory, payroll, or a build-out. This page covers the formation steps precisely, then walks through how a newly formed Illinois LLC realistically gets funded once it has deposits moving through a business account.

Step-by-Step: Forming Your Illinois LLC

The formation itself is a defined checklist. Work it in order — several steps depend on the ones before them.

1. Choose and check your name. The name must include "LLC," "L.L.C.," or "Limited Liability Company" and be distinguishable from existing entities. Search the Secretary of State's business database before you commit. If you are not ready to file, you can reserve a name for 90 days.
2. Appoint a registered agent. This is a person or company with a physical Illinois street address available during business hours to receive legal service. You can be your own agent, but many owners use a commercial agent to keep their home address off public record.
3. File Articles of Organization (Form LLC-5.5). Submit online or by mail to the Secretary of State with the $150 fee. This is the document that legally creates the LLC.
4. Get an EIN from the IRS. Free, online, immediate. Required for banking, hiring, and most tax filings — even for single-member LLCs planning to hire or elect corporate taxation.
5. Draft an operating agreement. Illinois does not require you to file one, but it governs ownership splits, profit distribution, and what happens if a member leaves. Banks and funders often ask to see it. Do not skip it.
6. Open a business bank account. Separating business and personal funds protects your liability shield and — critically — builds the deposit record that future funding is underwritten against.
7. Handle licenses and registrations. Register for Illinois taxes with the Department of Revenue if you sell taxable goods or have employees, and check city/county licensing (Chicago has its own requirements).

For a broader view of entity choice and how structure affects borrowing, see our guide to business structure and funding.

What It Actually Costs (2026)

Budget for the mandatory state costs plus the optional ones you may want. Figures below are Illinois Secretary of State fees current for 2026; verify at filing time.

The realistic all-in for a straightforward single-member LLC that acts as its own registered agent is the $150 filing fee plus the $75 annual report going forward. The bigger money question is not formation cost — it is the operating capital you need in the first year.

Timeline: From Filing to Open for Business

Formation is faster than most owners expect; getting fundable is slower. Set both timelines correctly so you do not stall the business waiting on the wrong thing.

• Days 1-3: Online Articles of Organization typically approved within a few business days. Mailed filings run longer. Expedited service compresses this further.
• Day 1 (parallel): Apply for your EIN online the moment you have your approved name — it is immediate.
• Week 1: Open the business bank account once you have the approved Articles and EIN. Start routing all revenue through it now.
• Weeks 1-2: Register for state taxes and any local licenses; adopt the operating agreement.
• Months 3-6: This is when the business account has enough deposit history for revenue-based funding to underwrite you. The clock on "fundable" starts at your first deposit, not your formation date.

The takeaway for cash flow: you can be legally operating in under a week, but the funding market wants to see money actually moving through the account. The single most useful thing you can do in week one is start banking every dollar of revenue through the LLC.

How a New Illinois LLC Gets Funded

Traditional bank loans and SBA products lean heavily on time in business, personal credit, and collateral — which is exactly what a new LLC lacks. That gap is why so many Illinois owners stall right after formation. The practical path for a young company with revenue is revenue-based funding through a marketplace, where approval is driven by your business bank deposits and monthly revenue rather than your credit score or how long the entity has existed.

The general shape of what these funders look for:

• Bank deposits and revenue over credit. Consistent deposits into the business account carry more weight than FICO.
• FICO 500+ is commonly workable — credit is a factor, not the gate.
• Minimum funding around $10,000, scaling with your monthly revenue.
• Speed of 24-48 hours from a complete file to a decision, versus weeks for a bank.

A marketplace matters here because a single lender gives you one answer; a marketplace shops your deposit profile across multiple funders and returns the offers you actually qualify for. Repayment is structured as a share of ongoing sales, so it flexes with your cash flow instead of a fixed loan installment. No responsible funder should ever call approval "guaranteed" — anyone who does is a red flag. If you want the deeper mechanics, read our revenue-based financing guide.

Decision Framework: When Revenue-Based Funding Fits a New LLC

This kind of funding is a tool, not a default. Match it to your situation honestly.

It works best when:

• Your LLC is already generating revenue with regular deposits (roughly 3+ months of business banking).
• You need capital fast — inventory before a season, a piece of equipment to take on a bigger job, bridging a gap between invoicing and payment.
• Your credit is thin or rebuilding (500s) but sales are real and steady.
• The capital funds something that generates return quickly, so repayment comes out of the growth it creates.

Avoid it (or wait) when:

• The LLC has no revenue yet — you are pre-launch. Funding underwritten on deposits needs deposits. Start with founder capital or a startup-specific product first.
• You qualify for a bank term loan or SBA loan and can wait weeks — cheaper capital is worth the paperwork if you have the time and the profile.
• You would use it to cover a structural loss rather than a timing gap. Revenue-based repayment assumes future sales; borrowing against sales that are not coming is how businesses dig deeper.
• Your margins are too thin to absorb a share of sales going to repayment without choking operations.

The honest underwriter's rule: borrow against revenue you can already see in the account, for a use that pays for itself faster than you repay it.

Staying Compliant After Formation

Forming the LLC is a one-time event; keeping it alive is annual. Miss these and you risk administrative dissolution — which also complicates funding, since funders check that your entity is in good standing.

• Annual Report + $75 every year, due before the first day of the anniversary month of your formation. Late filing adds a penalty.
• Maintain your registered agent. If your agent's address changes or the agent resigns, update it promptly.
• Keep business and personal finances separate. Commingling funds can pierce your liability shield and muddies the bank statements funders review.
• State and local taxes. File Illinois returns and remit sales tax if applicable; stay current with the Department of Revenue.
• Keep clean bank statements. Beyond compliance, tidy, predictable deposits are literally the document a revenue-based funder underwrites. Good bookkeeping is a funding asset.