What Is a Registered Agent for an Illinois Corporation?
A registered agent is the person or organization that an Illinois corporation formally appoints to accept service of process, government filings, and official legal correspondence directed to the entity. Under 805 ILCS 5/5.05, every domestic corporation formed under the Business Corporation Act and every foreign corporation authorized to transact business in the state must designate and continuously maintain a registered agent and a registered office in Illinois. The registered agent’s function is narrowly defined by statute: it serves as the corporation’s designated recipient for any process, notice, or demand required or permitted by law to be served upon the entity. This role is distinct from the operational responsibilities of the corporation’s officers, directors, and shareholders.
The registered agent does not manage the corporation’s daily operations, hold a corporate office, or act as a general representative for commercial purposes. Its statutory duty is limited to accepting legal and governmental documents and ensuring that the corporation receives them promptly. The registered office is the physical street address in Illinois at which the agent maintains a business office and at which the agent may be personally served during normal business hours. Every corporation type recognized in Illinois — domestic for-profit, domestic nonprofit, domestic professional service corporation, and foreign corporation — is subject to the same registered agent eligibility framework established in Article 5 of the Business Corporation Act and Article 105 of the General Not For Profit Corporation Act.
Is a Registered Agent Required for an Illinois Corporation?
Yes — a registered agent is a mandatory legal requirement for every corporation that exists or operates under Illinois law. Under 805 ILCS 5/5.05, “each domestic corporation and each foreign corporation having authority to transact business in this State shall have and continuously maintain” both a registered office and a registered agent in Illinois. The word “continuously” means the corporation must have a qualified, available agent and a compliant office at all times from the date of incorporation or registration through dissolution, withdrawal, or termination. Failing to satisfy this obligation is an independent ground for administrative dissolution of a domestic corporation or revocation of a foreign corporation’s authority to transact business.
The requirement applies uniformly to the following corporation types:
- Domestic for-profit corporations — formed using Form BCA 2.10, Articles of Incorporation
- Domestic nonprofit corporations — formed using Form NFP 102.10, Articles of Incorporation for a Not-For-Profit Corporation
- Domestic professional service corporations — formed using Form BCA 2.10 (PSCA), Articles of Incorporation under the Professional Service Corporation Act
- Foreign corporations — registered using Form BCA 13.15, Application for Authority to Transact Business in Illinois
Failure to appoint and maintain a registered agent triggers the administrative dissolution process under 805 ILCS 5/12.35(e) for domestic corporations and revocation of authority under 805 ILCS 5/13.55 for foreign corporations, regardless of the corporation’s purpose or type.
Who May Serve as a Registered Agent for an Illinois Corporation?
The registered agent must be either a qualified individual or an authorized business entity — but it may never be the corporation itself. Under 805 ILCS 5/5.05, the agent must be “an individual, resident in this State, whose business office is identical with such registered office, or a domestic or foreign corporation, limited liability company, limited partnership, or limited liability partnership authorized to transact business in this State that is authorized by its statement of purpose to act as such agent, having a business office identical with such registered office.” These eligibility rules apply identically to domestic for-profit, nonprofit, professional service, and foreign corporations.
Option A — An Individual — Any natural person who resides in Illinois may serve as a registered agent, provided the individual maintains a business office at the registered office address. The individual must be available at that address during normal business hours to receive service of process and other legal documents. There is no minimum-age requirement specific to the registered agent role, though an incorporator must be at least eighteen years of age.
Option B — An Organization — A domestic corporation, LLC, limited partnership, or limited liability partnership, or a foreign entity of any of those types that holds authority to do business in Illinois, may serve as registered agent. The organization’s business office must be identical with the registered office address, and its statement of purpose must authorize it to act as a registered agent. A corporation cannot serve as its own registered agent.
The following table summarizes the registered office requirements that apply to both individual and organizational agents:
| Requirement | Permissible | Not Permissible |
| Address type | Physical street address in Illinois | P.O. Box alone |
| Service accessibility | Personal service during normal business hours | Solely a mailbox or answering service |
| Commercial address use | Permitted if the commercial enterprise is the agent | Solely a telephone answering service |
| Location | Anywhere in Illinois | Outside Illinois |
Note: The Illinois Secretary of State’s not-for-profit incorporation instructions confirm that the registered office must have “a street or road address or a rural route and box number” and that “P.O. Box alone is unacceptable.” The same standard applies to all corporate types.
How to Designate a Registered Agent on Your Illinois Certificate of Formation
The registered agent and registered office are designated directly on the corporation’s articles of incorporation filed with the Illinois Secretary of State. Under 805 ILCS 5/2.10(a)(3), the articles must set forth “the address of the corporation’s initial registered office and the name of its initial registered agent at that office.” For foreign corporations, the agent is designated in the Application for Authority under 805 ILCS 5/13.15(a)(4). The designated agent must have consented to serve before the formation document is signed and submitted. Illinois does not require a separate consent form to be filed with the Secretary of State, but the corporation should retain evidence of the agent’s consent in its records.
Follow these steps to designate a registered agent during formation:
- Obtain written consent from the proposed registered agent before completing the articles of incorporation.
- Complete the registered agent and registered office section of the applicable formation form — provide the agent’s full legal name and the physical Illinois street address of the registered office.
- Confirm that the registered office address is a physical street address where the agent may be personally served during normal business hours.
- Submit the completed form to the Illinois Secretary of State. Filing is available online through the Department of Business Services, by mail to 213 State Capitol, Springfield, IL 62756, or in person at the Springfield or Chicago offices (115 S. LaSalle St., Suite 300, Chicago, IL 60603).
- Pay the filing fee by credit card (Visa, MasterCard, Discover, or American Express). A payment processor fee is assessed for all credit card transactions.
The formation filing fee varies by corporation type, as shown below:
| Corporation Type | Form | Filing Fee | Expedited Fee (Additional) |
| Domestic for-profit corporation | Form BCA 2.10 | $150 | $100 |
| Domestic professional service corporation | Form BCA 2.10 (PSCA) | $150 | $100 |
| Domestic nonprofit corporation | Form NFP 102.10 | $50 | $25 |
| Foreign corporation | Form BCA 13.15 | $150 | $100 |
Standard processing takes approximately ten business days. Expedited service provides a response within twenty-four hours, excluding weekends and holidays. All fees and form numbers are published on the Domestic and Foreign Corporations Publications and Forms page.
Note: A foreign corporation’s Application for Authority must also include a copy of its articles of incorporation, duly authenticated by the proper officer of its state of incorporation, as required by 805 ILCS 5/13.15(a). The filing must be submitted in duplicate.
Registered Agent Requirements for Professional Corporations in Illinois
A professional service corporation formed under the Professional Service Corporation Act (805 ILCS 10) is subject to the same registered agent requirements as a standard for-profit corporation. The distinctions between a professional service corporation and a general business corporation concern ownership eligibility, licensure, and the scope of permissible services — not the designation or qualification of the registered agent. Under 805 ILCS 10/6, one or more individuals licensed to perform the same professional service in Illinois may organize a professional corporation by filing articles of incorporation with the Secretary of State, and those articles “shall meet the requirements of the Business Corporation Act of 1983” — including the registered agent and registered office provisions of Article 5.
The registered agent of a professional service corporation need not be a licensed professional. Under 805 ILCS 10/3.4, all shareholders, directors, officers, agents, and employees of the corporation (except those providing ancillary services) must be duly licensed professionals. However, the statute explicitly distinguishes the registered agent role from the shareholder, director, officer, and employee roles. The registered agent need not hold a professional license unless the agent also serves in one of those other capacities.
| Requirement | Standard For-Profit Corporation | Professional Service Corporation |
| Registered agent eligibility | 805 ILCS 5/5.05 | 805 ILCS 5/5.05 (identical) |
| Consent required | Yes | Yes |
| Registered office requirements | Physical Illinois address | Physical Illinois address (identical) |
| A corporation cannot be its own agent | Yes | Yes |
| Governing person eligibility | No professional license required | Must be licensed in the same profession (805 ILCS 10/3.4) |
| Formation form | Form BCA 2.10 | Form BCA 2.10 (PSCA) |
| Formation filing fee | $150 | $150 |
A professional service corporation may be organized “only for the purpose of rendering one specific type of professional service and services ancillary thereto,” though the statute permits related professional services to be rendered under the same entity. A foreign professional service corporation may secure authority to transact business in Illinois under 805 ILCS 5/13.05, provided it demonstrates compliance with the act regulating its professional service and meets the ownership and control requirements of the Professional Service Corporation Act. The same registered agent rules apply to a foreign professional service corporation once it obtains authority to do business in the state.
The Registered Agent’s Role in Corporate Governance and Legal Proceedings
The registered agent occupies a distinct and statutorily defined position within the framework of Illinois corporate governance and legal proceedings. Its role is separate from, and should not be confused with, the roles of the corporation’s officers, directors, and shareholders. The agent exists to satisfy a specific compliance obligation: ensuring that the corporation has a reliable point of contact for all legal processes, government notices, and formal demands served under Illinois law. This function directly affects the corporation’s ability to respond to lawsuits, receive administrative correspondence, and maintain good standing with the Secretary of State.
Primary Role — Designated Agent for Service of Process — Under 805 ILCS 5/5.25(a), “any process, notice, or demand required or permitted by law to be served upon a domestic corporation or a foreign corporation having authority to transact business in this State may be served either upon the registered agent appointed by the corporation or upon the Secretary of State.” Proper service on the registered agent at the registered office constitutes valid service on the corporation itself. A lawsuit is legally initiated against the corporation when the summons and petition are delivered to the registered agent, triggering the corporation’s deadline to file a responsive pleading.
The Secretary of State as Substitute Agent — The Secretary of State is irrevocably appointed as a substitute agent for service of process under several circumstances defined by 805 ILCS 5/5.25(b). These include: the corporation fails to appoint or maintain a registered agent in Illinois, the registered agent “cannot with reasonable diligence be found at the registered office,” a domestic corporation has been dissolved, and a civil or criminal proceeding is filed within five years, or a foreign corporation’s authority has been revoked or withdrawn. When a process is served on the Secretary of State as a substitute agent, the serving party must also transmit copies to the corporation by registered or certified mail at the last registered office on file. The practical risk is substantial: the corporation may not receive timely notice of the action, creating a material risk of a default judgment.
Post-Dissolution and Post-Revocation Obligations — Under 805 ILCS 5/5.05, the registered agent and registered office on record at the date of dissolution remain as agents for service of process during the five-year post-dissolution winding-up period provided in Section 12.80, unless the agent resigns or the corporation files a proper change. The same rule applies when a foreign corporation’s authority is revoked. The registered agent’s obligations, therefore, do not automatically terminate when the corporation ceases active business.
Governance Implications — The board of directors bears responsibility for ensuring that a qualified, available registered agent is continuously maintained. Any change of the registered agent or registered office requires a board resolution and prompt filing of a Statement of Change with the Secretary of State. The corporation’s annual report also requires current registered agent information, and a discrepancy between the annual report data and the records on file may trigger the need for a corrective filing.
Registered Agent Information in Corporate Bylaws
Under 805 ILCS 5/2.25, the bylaws of a corporation “may contain any provisions for the regulation and management of the affairs of the corporation not inconsistent with law or the articles of incorporation.” Illinois does not require the corporate bylaws to identify the registered agent or registered office. The official designation of the registered agent is made in the articles of incorporation filed with the Secretary of State and is updated by filing the appropriate change form under 805 ILCS 5/5.10. Bylaws are internal governance documents maintained at the corporation’s principal office and are not filed with the Secretary of State.
Amending the bylaws to reflect a new registered agent does not constitute an official change — the only filing that has legal effect with the Secretary of State is the Statement of Change of Registered Agent and/or Registered Office. Nonetheless, a corporation may choose to reference its registered agent in its bylaws for several practical reasons: providing directors, officers, and shareholders with a centralized reference to current agent information; establishing an internal notification procedure when the registered agent or registered office changes; and documenting the process by which the board will appoint a replacement agent in the event of a resignation or vacancy.
What Happens to an Illinois Corporation Without a Registered Agent?
An Illinois corporation that fails to maintain a registered agent faces administrative dissolution, loss of its ability to conduct business, and exposure to substitute service of process that may result in default judgments. Under 805 ILCS 5/12.35(e), the Secretary of State may dissolve any corporation administratively if it “has failed to appoint and maintain a registered agent in this State.” For a foreign corporation, the equivalent consequence is revocation of its authority to transact business under 805 ILCS 5/13.55.
Once the Secretary of State determines that grounds for dissolution exist, a Notice of Delinquency is sent by regular mail to the corporation’s registered office — or, if no office is maintained, to the president or other principal officer at the last known address. Under 805 ILCS 5/12.40, the corporation has 90 days to correct the default. If the default is not cured within that period, the Secretary of State issues a certificate of dissolution that terminates the corporation’s existence. A dissolved corporation may only take actions necessary to wind up and liquidate its affairs.
| Consequence | Authority |
| Administrative dissolution of a domestic corporation | 805 ILCS 5/12.35(e) |
| Revocation of a foreign corporation’s authority | 805 ILCS 5/13.55 |
| Secretary of State becomes substitute agent for service of process | 805 ILCS 5/5.25(b) |
| A corporation may not carry on business after dissolution | 805 ILCS 5/12.40(c) |
| Risk of default judgment without the corporation’s knowledge | 805 ILCS 5/5.25(b)–(c) |
| Registered agent on record remains liable for service during the five-year post-dissolution period | 805 ILCS 5/5.05 |
Reinstatement — A domestic corporation dissolved under Section 12.40 may apply for reinstatement using Form BCA 12.45/13.60. Under 805 ILCS 5/12.45, reinstatement requires filing the application, submitting all overdue reports, and paying all fees, franchise taxes, and penalties then due. The application must include the corporation’s name at dissolution, the dissolution date, and the registered office address and agent name upon reinstatement. The reinstatement filing fee is $200, with an additional $100 for expedited processing. Upon reinstatement, “the corporate existence for all purposes shall be deemed to have continued without interruption from the date of the issuance of the certificate of dissolution.” A foreign corporation whose authority was revoked may be reinstated under the same form and a parallel procedure set out in 805 ILCS 5/13.60. The Reinstatement Filing – Corporation page provides electronic filing instructions.
Note: Illinois imposes no express statutory deadline by which a dissolved domestic corporation must apply for reinstatement, but all overdue reports, franchise taxes, and penalties must be satisfied before the Secretary of State will process the application — and the accumulation of those obligations grows with each passing year.
How to Change a Registered Agent for an Illinois Corporation
Any registered Illinois corporation — domestic for-profit, nonprofit, professional service, or foreign — may change its registered agent, its registered office address, or both by filing a Statement of Change with the Secretary of State. The statutory authority for the change is 805 ILCS 5/5.10 for business corporations and 805 ILCS 105/105.10 for not-for-profit corporations. The filing must be authorized by a resolution duly adopted by the corporation’s board of directors. The change becomes effective upon filing by the Secretary of State.
Follow these steps to change the registered agent:
- Obtain consent from the new registered agent before completing the change form.
- Complete the applicable form — Form BCA 5.10/5.20 for business corporations (including professional service corporations and foreign corporations) or Form NFP 105.10/105.20 for not-for-profit corporations — with the corporation’s name, current registered office and agent, new registered office and/or agent, a confirmation that the registered office and agent’s business office addresses will be identical, and a statement that the change was authorized by board resolution.
- File the form with the Secretary of State. Online filing is available through the Corporation Registered Agent or Address Change portal. Paper filings may be submitted by mail in duplicate to 213 State Capitol, Springfield, IL 62756, or in person at the Springfield or Chicago offices.
- Pay the applicable filing fee by credit card.
The filing fee differs depending on the corporation type:
| Corporation Type | Filing Fee | Expedited Fee (Additional) |
| Domestic or foreign business corporation (including professional service corporations) | $25 | $50 |
| Domestic or foreign not-for-profit corporation | $5 | $25 |
Current fees are published on the Domestic and Foreign Corporations Publications and Forms page and the Not For Profit Corporations Publications and Forms page. Expedited service provides a twenty-four-hour turnaround, excluding weekends and holidays. Payment must be by credit card, and a payment processor fee applies to all transactions.
Illinois also provides a separate mechanism for an agent-initiated address change. Under 805 ILCS 5/5.20, the registered agent itself may change the address of the registered office to another address in Illinois by filing a statement executed by the agent. This is useful when a single agent represents multiple corporations and relocates to a new office — the agent files one statement per represented entity without requiring a board resolution from each corporation.
A registered agent may resign by filing a Notice of Resignation of Registered Agent (Form BCA 5.15) with the Secretary of State. Under 805 ILCS 5/5.15, the agent must mail a copy of the notice to the corporation at its principal office at least ten days before filing. The resignation becomes effective not less than thirty days after the date of filing. The filing fee for a resignation is $5. Once the resignation takes effect, the corporation must promptly appoint a new agent to avoid the grounds for administrative dissolution.
Illinois Corporation Registered Agent Frequently Asked Questions
Can an Illinois corporation serve as its own registered agent?
No. Under 805 ILCS 5/5.05, the registered agent must be either an individual resident of Illinois or a separate business entity authorized to transact business in Illinois and authorized by its statement of purpose to act as an agent. A corporation cannot designate itself as its own registered agent. The agent must be a distinct person — whether a natural individual or another organization — capable of receiving service of process independently at the registered office address. This prohibition applies equally to for-profit, nonprofit, and professional service corporations.
Can a sole incorporator of a corporation serve as its registered agent?
Yes. Any individual who resides in Illinois and maintains a business office at the registered office address may serve as the corporation’s registered agent, including the sole incorporator. By signing the articles of incorporation under 805 ILCS 5/2.10, the incorporator affirms that the named registered agent has consented to serve. The incorporator’s personal address will appear in the corporation’s public filing history if it also serves as the registered office address. No separate consent form is required to be filed with the Secretary of State, but the corporation should retain written evidence of the agent’s consent.
Does a corporation need a registered agent separate from its officers and directors?
No. An officer, director, or employee of the corporation who meets the eligibility requirements — Illinois residency and a business office at the registered office address — may serve as the corporation’s registered agent. The only prohibition is that the corporation itself cannot serve as its own agent. Under 805 ILCS 5/5.05, the agent must be either a natural person or a separate entity, but there is no requirement that the agent be unrelated to the corporation’s management. A director, officer, or founder may serve in both capacities simultaneously.
Must a registered agent be designated before filing formation documents?
Yes. The articles of incorporation require the name and address of the initial registered agent and registered office as a mandatory field under 805 ILCS 5/2.10(a)(3). The formation document cannot be filed without this information. The designated agent must have already consented to serve before the articles are signed and submitted. For foreign corporations, the same requirement appears in the Application for Authority under 805 ILCS 5/13.15(a)(4).
Is the corporation’s registered agent required to be listed in the corporate bylaws?
No. Under 805 ILCS 5/2.25, the bylaws may contain any provisions for the regulation and management of the corporation’s affairs not inconsistent with law, but there is no mandate to include the registered agent or registered office. The official designation is made in the articles of incorporation and updated by filing a Statement of Change with the Department of Business Services. Bylaws are internal governance documents not filed with the Secretary of State.
Can I change my corporation’s registered agent online?
Yes. The Illinois Secretary of State accepts electronic filings for changes of registered agent through the Corporation Registered Agent or Address Change portal. The filing fee is $25 for business corporations (including professional service corporations and foreign corporations) and $5 for not-for-profit corporations. Payment is by credit card, and a payment processor fee applies. Expedited twenty-four-hour processing is available for an additional $50 (business corporations) or $25 (not-for-profit corporations).
Do Professional Corporations (PCs) have different registered agent requirements?
No. A professional service corporation formed under the Professional Service Corporation Act (805 ILCS 10) is subject to the same registered agent and registered office requirements as a standard for-profit corporation under 805 ILCS 5/5.05. The distinctions between professional service corporations and general business corporations relate exclusively to ownership eligibility, licensure of shareholders and directors, and the scope of professional services — not to the registered agent designation. The registered agent itself does not need to be a licensed professional.
Can the same individual or service act as registered agent for multiple Illinois corporations?
Yes. Illinois law does not limit the number of corporations for which a single individual or organization may serve as registered agent. This practice is standard among professional registered agent service companies. When the agent relocates within Illinois, 805 ILCS 5/5.20 allows the agent to file a change-of-address statement for each represented corporation, updating all records without requiring a separate board resolution from each entity.
What happens if my corporation’s registered agent moves out of Illinois?
The agent no longer satisfies the Illinois residency requirement under 805 ILCS 5/5.05. The corporation must promptly appoint a new, eligible registered agent by filing Form BCA 5.10/5.20 with the Secretary of State. If the corporation fails to maintain a registered agent in Illinois, the Secretary of State may initiate administrative dissolution proceedings under 805 ILCS 5/12.35(e). If the agent moves to a new address within Illinois, the agent may file an address change under 805 ILCS 5/5.20 without the corporation filing a separate statement.
Is there a different registered agent fee for nonprofit corporations changing their agent?
Yes. The filing fee for a change of registered agent is $5 for domestic or foreign not-for-profit corporations, compared to $25 for domestic or foreign business corporations. Expedited processing adds $25 for not-for-profit corporations and $50 for business corporations. Both fee schedules are published on the Domestic and Foreign Corporations Publications and Forms page. Payment must be made by credit card, and a payment processor fee applies to all transactions.