How to Change Your Business Address in Illinois: Forms and Agencies

To change your business address in Illinois, corporations and LLCs file a Statement of Change with the Secretary of State, and every business — including sole proprietors — updates the IRS, the Illinois Department of Revenue, the U.S. Postal Service, and any local licensing offices. Which filings apply, and which form you use, depends on your entity type and which address is moving.

Figure Out Which Address Is Moving

Illinois tracks three separate addresses for a registered business, and mixing them up leads to filing the wrong form.

  • The registered office is the physical Illinois street address where your business can be served with legal documents. A P.O. Box will not do. Every corporation and LLC must keep one on file continuously.
  • The principal office is your main place of operations. It can sit outside Illinois and can differ from the registered office.
  • The mailing address is where general correspondence goes, and it can differ from both of the above.

Most relocations mean changing the registered office. If only your principal office is moving and that address appears in your organizing documents, you have a different filing on your hands — Articles of Amendment, covered further down.

File a Statement of Change With the Secretary of State

For a registered office or registered agent change, corporations and LLCs each have their own form:

Both forms ask for the same information: your legal business name, the file number assigned by the Secretary of State, the old registered office address, the new address, and the registered agent’s name at the new location. A corporate officer signs for a corporation; a member or manager signs for an LLC.

The filing fee is $25 for either entity type. Corporations can pay a $50 expedited fee on top of that, bringing the total to $75, for review within 24 business hours.3Illinois Secretary of State. Corporation Registered Agent or Address Change LLCs can file the change online through the Secretary of State’s business services portal. Mailed checks go to the Secretary of State.

If you have an annual report coming due, file the Statement of Change separately anyway rather than waiting to correct the address on your report.4Illinois Secretary of State. File an Annual Report The address on file needs to be current between report cycles, not just at report time.

When You Need Articles of Amendment Instead

If your principal office address appears in your Articles of Incorporation or Articles of Organization, moving that office means amending the organizing document itself. This is a heavier filing than a Statement of Change because you are rewriting a foundational corporate document, and you have to identify the specific article being changed and state the new language.

Update the IRS

The IRS uses its own address records, separate from anything Illinois maintains. File Form 8822-B, Change of Address or Responsible Party — Business, to report a new business mailing address or physical location.5Internal Revenue Service. About Form 8822-B, Change of Address or Responsible Party – Business If your responsible party has also changed, you have 60 days to report that update, and reporting it is mandatory.

Skipping this filing has a specific consequence: the IRS will not waive penalties on the grounds that you never got the notice. As the form itself warns, if you fail to provide a current mailing address, you may not receive a notice of deficiency or a demand for tax, but penalties and interest keep accruing.6Internal Revenue Service. Form 8822-B – Change of Address or Responsible Party – Business For employment tax returns, the IRS sends confirmation notices (148A and 148B) to both the old and new addresses after processing the change.7Internal Revenue Service. Address Changes

Update the Illinois Department of Revenue

The Illinois Department of Revenue keeps records separate from the Secretary of State, so both need updating. You can report the change through the MyTax Illinois portal, by calling 217-785-3707, by emailing REV.CRD@illinois.gov, or in person at a regional office.8Illinois Department of Revenue. Updating Your Business Information The online portal is fastest and handles both your legal address and mailing address.

Forward Your Mail Through USPS

Government filings update official records, but mail already moving through the system will keep going to the old address. Submit a business change of address at usps.com for a $1.25 identity verification fee.9USPS. Standard Forward Mail and Change of Address A permanent forwarding request runs 12 months and can be extended. If the move is temporary, choose the temporary option (15 days to a year). First-Class mail and periodicals forward at no additional charge.

If you file in person at a post office instead of online, whoever goes needs documentation showing authority to act for the business: a notarized letter, a power of attorney, or a letter on company letterhead signed by someone in a leadership role.

Local Licenses and Trademarks

Many Illinois cities and counties tie business licenses, permits, and zoning approvals to a specific address. There is no single statewide process — check with your city clerk or county licensing department to find out whether your move requires a local filing.

If your business holds federal trademark registrations, update your address with the U.S. Patent and Trademark Office using the TEAS Change of Address or Representation form. The USPTO keeps a domicile address (private) and a mailing address (public), so consider which one needs updating.10United States Patent and Trademark Office. Personal Information in Trademark Records Missing a maintenance deadline because a notice went to an old address can result in cancellation.

Sole Proprietorships and General Partnerships

Sole proprietors and general partnerships do not file with the Secretary of State, because these entities are not registered there. Updates are limited to the IRS (Form 8822-B), the Illinois Department of Revenue (MyTax Illinois), and any local agencies where you hold licenses or permits. The process is shorter, but the tax-authority stakes are the same: penalties and interest keep accumulating on notices you never see.

What Happens If You Don’t Update

Skipping the Secretary of State filing carries the sharpest consequence. Failing to maintain a registered agent and office in Illinois gives the Secretary of State grounds to administratively dissolve your LLC.11Illinois General Assembly. Illinois Compiled Statutes 805 ILCS 180 – Limited Liability Company Act The Secretary of State sends a delinquency notice to the registered office, or, if that address is invalid, to the last known principal office on file. Sixty days without correction, and the Secretary of State issues a certificate of dissolution.

Reinstatement requires filing all overdue annual reports (up to six years) and paying all outstanding fees.12Illinois Secretary of State. LLC Reinstatement During the dissolved period, you may lose the ability to enforce contracts, file lawsuits, or defend claims in the business’s name.

An outdated registered office also creates a service-of-process risk. If someone sues your business and the papers are served at the old address, a court may still treat you as properly notified, which opens the door to a default judgment.