Can a non-US founder open a Mercury account with a Illinois LLC?

Yes. Mercury explicitly supports foreign founders with a US LLC. You need the Illinois formation document (the Articles of Organization), the IRS EIN letter, a non-US passport for identity, and a US business address. No US SSN or residency is required.

Does forming in Illinois affect Mercury eligibility?

No. Mercury accepts LLCs from all US states and territories. The formation document name varies by state, and Illinois issues Articles of Organization; Mercury accepts it the same as any other state's.

I do not live in Illinois. Can I still use a Illinois LLC on Mercury?

Mercury does not check where you live, only that the Illinois entity is validly registered and that the details you enter match Illinois's record. The catch is not Mercury, it is the state you actually operate from: states require an out-of-state LLC to register as a foreign LLC before it transacts business there, which is a second filing and a second fee on top of Illinois's $150. Forming in Illinois while working somewhere else usually means paying both states, not one.

Do I need a Illinois sales-tax permit before my first sale through Mercury?

Probably yes. Illinois charges a 6.25% state rate, and payments taken through Mercury are not covered by marketplace-facilitator laws, so you collect and remit yourself. Register before your first taxable sale if you have physical presence in Illinois, or once you cross its remote-seller threshold of $100,000 in sales in the previous 12-month period (no transaction-count threshold).

Marketplace Verification

How to pass Mercury verification with an Illinois LLC

What Mercury asks for at signup, and which Illinois LLC documents satisfy each requirement.

By Edmond Hui · Last updated: August 4, 2026

Edmond Hui · Founder, MyStateLLC

Edmond Hui is a software engineer and serial entrepreneur based in New York who has founded multiple online businesses across e-commerce, media, and information publishing. Before transitioning into tech, he spent years as a commercial real estate professional closing deals totaling over 100,000 square feet, giving him firsthand experience with business formation and entity structuring. He built MyStateLLC to provide the free, state-specific LLC guidance he wished existed when forming his own companies.

A Illinois LLC is generally eligible for Mercury verification — you will need to provide your Articles of Organization, EIN, beneficial-owner ID, and a valid US business address. Nothing about forming in Illinois blocks approval, and nothing about it guarantees approval either: the final call is Mercury's.

Mercury is a fintech banking platform whose deposits are held at FDIC-member partner banks (currently Choice Financial Group and Column N.A., Members FDIC), making it popular with startups and small businesses including those with non-US founders. To open a Mercury account for a Illinois LLC, you must provide the company's formation document (in Illinois, the Articles of Organization), an IRS-issued EIN confirmation, a government ID for the beneficial owner(s), and a physical US address. Mercury supports all US-state LLC types and is commonly used by foreign founders who have formed a US LLC, since it does not require founders to be US citizens or residents.

In Illinois the entity behind that check is an LLC created by filing Articles of Organization, which costs $150. Illinois does not publish a processing time for LLC filings, so treat state approval as the open-ended step in your timeline rather than the Mercury review. Because Illinois names a member or manager on a routine public filing, the owner name Mercury asks you to confirm is already a matter of public record.

Not legal advice: Verification requirements change, and so do Illinois's filing fees and forms. Confirm current platform rules with Mercury, and current filing rules with the Illinois filing office, before you file. Mercury's requirements were last reviewed 2026-07-21, and Illinois's figures on this page come from its own published schedule.

What Mercury requires, and how a Illinois LLC meets each

Requirement	How your Illinois LLC satisfies it
LLC formation documents	Upload the Articles of Organization Illinois returned to you, stamped and approved.
IRS EIN confirmation letter	Provide your federal EIN (free from the IRS; non-US founders without an SSN must apply via Form SS-4 by fax or phone rather than the online tool) — independent of Illinois.
Government-issued ID for owner(s)	Provide a government ID for each beneficial owner named in your Illinois filings. Illinois names a member or manager on a routine public filing, so at least one name already matches state records.
US business address	Use a US street address registered to the LLC in Illinois (your Illinois registered-agent or virtual business address), since a PO box is usually rejected.

Illinois-specific things to watch

Illinois names a member or manager on a routine public filing, so Mercury's beneficial-owner check will line up with public state records — you still upload a government ID for each owner. (Illinois does not permit anonymous LLC formation; management is disclosed on public filings.)

Illinois sales tax & nexus rules for Mercury sellers

Illinois charges a 6.25% state sales-tax rate. Payments through Mercury are not covered by marketplace-facilitator laws — you collect and remit yourself. Registration is required before your first taxable sale if you have physical presence in Illinois (an in-state location, inventory, or employees), or once you cross Illinois's remote-seller economic-nexus threshold of $100,000 in sales in the previous 12-month period (no transaction-count threshold).

Illinois is one of the more complex states for sales tax. It uses both 'origin-based' and 'destination-based' sourcing depending on whether you have physical presence, which can change your effective rate. Home-rule cities like Chicago add additional taxes. SaaS and digital subscriptions are taxable in Illinois. Chicago also imposes its own separate city tax on certain transactions. Note: Illinois repealed its 200-transaction economic-nexus trigger (effective 2026); only the $100,000 sales threshold now applies.

How to verify your Illinois LLC on Mercury

LLC formation documents. Upload the Articles of Organization Illinois returned to you, stamped and approved.
IRS EIN confirmation letter. Provide your federal EIN (free from the IRS; non-US founders without an SSN must apply via Form SS-4 by fax or phone rather than the online tool) — independent of Illinois.
Government-issued ID for owner(s). Provide a government ID for each beneficial owner named in your Illinois filings. Illinois names a member or manager on a routine public filing, so at least one name already matches state records.
US business address. Use a US street address registered to the LLC in Illinois (your Illinois registered-agent or virtual business address), since a PO box is usually rejected.

Non-US founders with Illinois LLCs

Mercury explicitly supports non-US founders who have formed a US LLC, Illinois included. A non-US passport is accepted for identity verification. The entity must be formed and registered in the United States, and a US business address is required, which a Illinois registered agent address satisfies. No US Social Security Number is needed from the founder.

Frequently Asked Questions

: Yes. Mercury explicitly supports foreign founders with a US LLC. You need the Illinois formation document (the Articles of Organization), the IRS EIN letter, a non-US passport for identity, and a US business address. No US SSN or residency is required.
: No. Mercury accepts LLCs from all US states and territories. The formation document name varies by state, and Illinois issues Articles of Organization; Mercury accepts it the same as any other state's.
: Illinois charges $150 to file Articles of Organization, and that is the state's fee to create the LLC. Illinois does not publish a processing time for LLC filings, so treat state approval as the open-ended step in your timeline rather than the Mercury review. Mercury charges nothing for verification itself, so the $150 filing fee and Illinois's ongoing obligations are the real cost of getting verified as a Illinois entity.
: Mercury does not check where you live, only that the Illinois entity is validly registered and that the details you enter match Illinois's record. The catch is not Mercury, it is the state you actually operate from: states require an out-of-state LLC to register as a foreign LLC before it transacts business there, which is a second filing and a second fee on top of Illinois's $150. Forming in Illinois while working somewhere else usually means paying both states, not one.
: Probably yes. Illinois charges a 6.25% state rate, and payments taken through Mercury are not covered by marketplace-facilitator laws, so you collect and remit yourself. Register before your first taxable sale if you have physical presence in Illinois, or once you cross its remote-seller threshold of $100,000 in sales in the previous 12-month period (no transaction-count threshold).