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Register Your Indiana LLC in Illinois

Step-by-step foreign qualification requirements, fees, and filing instructions for Indiana LLCs expanding into Illinois.

Cost Summary

Illinois filing fee: $150
Indiana Certificate of Existence: $27
Annual obligation in Illinois: $75/year
Estimated year 1 total: $252

Note: Year 1 total includes the $150 filing fee in Illinois, the $27 Certificate of Existence fee from Indiana, and $75 in first-year Illinois state charges. Registered agent fees (typically $100-$200/year) are not included.

Indiana data last reviewed Aug 25, 2026 · in.gov

Illinois data last reviewed Aug 22, 2026 · ilsos.gov

How to register your Indiana LLC in Illinois

Check name availability in Illinois

Before filing, verify that your LLC name (or a distinguishable variation) is available in Illinois. If your exact name is already taken, you may need to register under a fictitious or assumed name.

Search Illinois business names ↗

Get a Certificate of Existence from Indiana

Illinois requires a Certificate of Existence from Indiana to prove your LLC is in good standing. The fee is $27. Available to order online. No expiration printed; foreign-state applications typically require dating within 30-90 days.

Order from Indiana ↗

File the Application for Admission to Transact Business (Form LLC-45.5) in Illinois

Submit your application along with the Certificate of Existence and the $150 filing fee. Processing time is 10-45 days by mail; same-day if filed in person with the $100 expedite. Expedited processing available for $100 on an application for admission to transact business, on top of the $150 filing fee. Illinois prices expedite by document rather than by speed, so this is the rate for the admission filing itself and other Illinois filings carry their own. Expedited requests must be made in person at the Springfield or Chicago office and cannot be posted..

Illinois filing portal ↗

Appoint a registered agent in Illinois

You must designate a registered agent with a physical address in Illinois to accept legal documents on behalf of your LLC. This is required as part of the foreign qualification application.

Ongoing compliance in Illinois

Annual report: $75/year
Report due: Before the first day of the anniversary month
Processing time: 10-45 days by mail; same-day if filed in person with the $100 expedite
Expedite: $100 on an application for admission to transact business, on top of the $150 filing fee. Illinois prices expedite by document rather than by speed, so this is the rate for the admission filing itself and other Illinois filings carry their own. Expedited requests must be made in person at the Springfield or Chicago office and cannot be posted.

Important to know about Illinois

Operating unregistered costs $100 for each month or fraction of a month, so the penalty compounds faster than in most states.

Registering after you already started doing business in Illinois? See the Illinois late-registration penalties for the back fees and fines that can apply.

Activities that do NOT require registration in Illinois

Maintaining, defending, or settling a lawsuit or other proceeding
Holding meetings of members or managers, or carrying on internal company affairs
Maintaining bank accounts
Maintaining an office or agent to transfer, exchange, or register the company's own securities, or keeping a trustee or depositary for them
Selling through independent contractors
Soliciting or obtaining orders, by mail or through employees or agents, if orders require acceptance outside the state before becoming contracts
Owning real or personal property, and nothing more
Conducting an isolated transaction completed within 120 days that is not part of repeated similar transactions
Having a member or manager who is a resident of Illinois

Under 805 ILCS 180/45-47, all 9 statutory items. Illinois diverges from the uniform act three ways: the isolated-transaction window is 120 days rather than 30; there is a unique safe harbor for having a member or manager who is an Illinois resident; and the list omits indebtedness, debt collection and interstate commerce entirely. Subsection (b) disclaims service of process only, with no taxation clause.

Need a registered agent in Illinois?

A registered agent is required for foreign qualification. These services operate in all 50 states.

Get Northwest Registered Agent ↗

Recommended · $125/year · Privacy included

Registered Agents Inc

$200/year · Report filing included, state fees extra

Visit site ↗

Harbor Compliance

$99 first year, then $149/year · Full-service compliance option

Visit site ↗

Not sure which service fits? Our full Northwest Registered Agent review and Harbor Compliance review cover pricing, renewal terms, and where each one fits.

Need a business address in Illinois?

A virtual mailbox gives your LLC a professional address in Illinois for mail forwarding, public filings, and banking, without leasing office space.

Northwest Mail Forwarding $20/mo

Unique suite number + unlimited digital mail scanning

Learn more ↗

Registered Agents Inc $50/year

10 mail scans/year + unique suite number

Learn more ↗

Independent mailbox providers

iPostal1

Largest address network in the US. Best budget option for a registered business address.

From $14.99/mo Visit site ↗

Alliance Virtual Offices

Real commercial address inside a staffed office center, with an Address Certification Letter for banking and registration.

From $49/mo Visit site ↗

Bizee

Commercial street address with unlimited mail scanning, cheapest bundled with Bizee formation.

$29/mo Visit site ↗

Check your full compliance

Use our free tool to check if you need to register in additional states.

Start free compliance check ↗

Sources

https://www.ilsos.gov/departments/business_services/home.html

This page provides general information based on publicly available state requirements. It is not legal advice. Verify all fees and requirements with the Illinois Secretary of State before filing.