What opening business banking in Illinois actually involves.
Required documents for Illinois LLC banking
Stamped Illinois Articles of Organization (the state-acknowledged version). IRS EIN confirmation letter (CP 575) or equivalent. Operating Agreement (multi-member LLCs). Government photo ID for every owner with 25%+ membership interest. Some banks also request a banking resolution and proof of business address.
Traditional banks (Chase, BofA, Wells, US Bank, regional banks)
In-person account opening at most major banks. Account types include business checking, business savings, business credit cards, merchant services. Minimum opening deposits typically $25-$100. Monthly fees waived above balance thresholds.
Fintech / online banks (Mercury, Bluevine, Relay, Found)
Online-only account opening. Mercury is the typical pick for startups (no minimum balance, no monthly fees, API-friendly). Bluevine offers a business checking with interest. Relay is built for multi-account cash management. Found targets sole proprietors and small LLCs.
KYC and beneficial ownership
Every bank applies Bank Secrecy Act KYC and FinCEN Beneficial Ownership Rule procedures. Each member with 25%+ ownership must be individually identified (legal name, SSN/ITIN, DOB, government ID). Plus one "control person" (typically the managing member) regardless of percentage.
Maintain the corporate veil
After opening: NEVER deposit personal funds to the LLC account. NEVER use the LLC account for personal expenses. Every transfer between personal and LLC accounts should be documented as a capital contribution or member distribution. Sloppy accounting is the most common cause of veil-piercing.
Multi-account structure
Best practice for serious LLCs: separate accounts for operating funds, tax savings (set aside 25-30% of revenue), payroll (if applicable), and quarterly profit distribution. Relay and similar fintech make multi-account management trivial.
A clean handoff, in 7 steps.
Form the LLC + get EIN first
You cannot open the business account before you have the stamped Illinois Articles and the EIN. Most banks require both at opening.
Decide traditional bank vs fintech
Traditional bank: in-person, broader services, established merchant processing. Fintech (Mercury / Bluevine / Relay): online-only, faster to open, often better for startups and remote founders.
Gather documents
Stamped Illinois Articles, EIN CP 575, Operating Agreement, photo ID for every member with 25%+ ownership.
Apply (online for fintech, in-person for traditional banks)
Fintech typically approves in 1-3 days. Traditional banks typically same-day in-person or 3-7 days for online applications.
Set up cash management
Linked savings, ACH bill pay, vendor payment setup. Multi-account structure for tax / operating / payroll separation if scale supports it.
Enforce strict separation
NEVER personal expenses through the LLC. NEVER personal deposits to the LLC (record as capital contribution if necessary).
Add tools
QuickBooks / Xero / FreshBooks bookkeeping integration. Bill.com or Ramp for accounts payable. Stripe / Square for merchant processing.
Formation is free. Everything else is optional.
We do not charge a service fee to form your LLC or Corporation. State filing fees still apply and pass through at cost. Add the Compliance Bundle to handle the year-one filings everyone needs.
- LLC or Corporation formation (any state)
- EIN application with the IRS
- Articles of Organization or Incorporation drafted and filed
- Free BOS dashboard for ongoing visibility
- Filing receipts to your document vault
- Everything in Free Formation (no add-on fee)
- Registered Agent service in your state (1 entity)
- Annual Report AutoFile, filed every year on time
- Certificate of Good Standing (1 included per year)
- 1 Amendment included per year (address, member, name)
- Operating Agreement (LLC) or Bylaws (Corp)
- Deadline monitoring across all your filings
Common questions.
What do I need to open a business bank account?
Typically your filed formation documents, your EIN confirmation, an Operating Agreement, and personal ID for the owners, plus the business address and sometimes a business license. Banks verify the LLC is real and who controls it, and missing the EIN or Operating Agreement is the usual holdup. We make sure your Illinois LLC paperwork is complete so the account opens on the first try.
Can I open a business account online?
Often yes, especially with fintech providers and many traditional banks that now offer online business onboarding, though some banks still want an in-person visit for certain entity types or cash needs. Online is fast when your documents are in order. We set up the Illinois LLC and EIN so whichever route you pick, online or branch, has exactly what it needs.
Should I use Mercury or a traditional bank?
It depends on how you operate. Fintechs like Mercury are fast, online, and good for digital businesses and remote or non-US founders, while a traditional bank suits cash deposits, in-person service, and lending relationships. Many businesses use one of each. We help you match the choice to your Illinois business rather than defaulting to whatever branch is nearest.
How long does it take to open the account?
With documents ready, fintech accounts can open in a day or two, while traditional banks may take a few days to a couple of weeks, longer if they need an in-person visit. The delay is almost always missing paperwork, not the bank. We prepare the Illinois LLC package so the account is not stuck waiting on a document you did not know they needed.
Can I use a personal account for my LLC?
You can, but you should not: mixing personal and business money is the fastest way to weaken your liability shield, since a court can argue the LLC is not truly separate from you. It also makes bookkeeping and taxes a mess. A dedicated business account is a core protection, and we set the Illinois LLC up so you can open one right away.
Do I need an Operating Agreement to open the account?
Many banks ask for one, especially for multi-member LLCs, to see who is authorized to act for the company, and even single-member LLCs benefit from having it ready. Not having one is a common reason an application stalls. We prepare an Operating Agreement with your Illinois LLC so the bank has the document it wants on hand.
What about the FinCEN Beneficial Ownership requirement?
Separate from any federal BOI filing, banks have their own know-your-customer rules and will ask who beneficially owns and controls the LLC when you open the account. This is a bank requirement, not the FinCEN report, and applies even though most US-formed LLCs no longer file BOI federally as of 2026. We prepare your Illinois LLC so the bank's ownership questions are easy to answer.
Can a non-US founder open a Illinois LLC bank account?
Yes, though it is more involved: you need the LLC, an EIN, available without an SSN, and identification, and many fintechs and some banks serve non-US owners, sometimes remotely. It is a common path, and the EIN is usually the gating step. We obtain the EIN and structure the Illinois LLC so foreign founders can actually get banked.
Do I need separate accounts for each LLC?
Yes. Each LLC should have its own bank account, because sharing one across entities blurs the legal separation that makes multiple LLCs worth having in the first place, and it muddies each entity's books. If you run several Illinois LLCs or a holding structure, we help you set up an account per entity so the layers stay clean.
Where to next?
Every filing connects into your File.Business operating system. Pick where to go from here: we keep the rest tracked.