How to Incorporate in Wisconsin
Learn how to incorporate in Wisconsin step by step. Covers Articles of Incorporation, state filing fees, registered agent requirements, and ongoing compliance with the Wisconsin DFI.
Bizee Editorial Staff
Editorial Team
Wisconsin corporation at a glance
Filing fee: $100 (online); $100 (mail) — paid to the Wisconsin DFI
Processing time: [PROCESSING_TIME] — check current times at dfi.wi.gov
State agency: Wisconsin Department of Financial Institutions (DFI), Division of Corporate and Consumer Services
Annual report due: By the last day of the calendar quarter in which your formation anniversary falls (e.g., March 31 if you formed between January 1 and March 31)
State tax rate: Wisconsin corporate income tax: 7.9% flat rate on net income
How to incorporate in Wisconsin
To incorporate in Wisconsin, you file Articles of Incorporation with the Wisconsin Department of Financial Institutions (DFI). The state filing fee is $100. You'll also need a unique business name, a registered agent with a Wisconsin street address, and an Employer Identification Number (EIN) from the IRS before you can open a bank account or hire employees.
Wisconsin is a straightforward state to incorporate in — there's no publication requirement, no minimum capital threshold, and the DFI accepts filings online or by mail. The steps below cover everything from naming your corporation to staying in good standing after formation.
Step 1: Choose and check your business name
Your corporation's name must be distinguishable from all existing entity names on file with the Wisconsin DFI. It also needs a corporate designator — words like "Corporation," "Incorporated," "Company," or an abbreviation like "Corp." or "Inc." are all acceptable under Wisconsin Statutes § 180.0401.
Use the DFI's Corporate Records Name Availability Search to check whether your proposed name is available before you file. Names that are the same as or confusingly similar to an existing entity will be rejected. If you plan to use the name as a trademark, run a separate search through the USPTO.
Step 2: Designate a registered agent
Every Wisconsin corporation must continuously maintain a registered agent — a person or business entity that receives official state communications and service of process on your behalf. Wisconsin law requires the registered agent to have a physical street address in Wisconsin; a P.O. box alone won't satisfy the requirement.
Your registered agent can be an individual Wisconsin resident or a business entity authorized to transact business in the state. Many founders use a professional registered agent service so they don't have to list a personal address on public state records.
Step 3: File your Articles of Incorporation
The Articles of Incorporation is the document that officially creates your Wisconsin corporation. You file it with the DFI — online through the DFI Business Entity File Online portal or by mailing the completed CORP2 form. The state filing fee is $100 either way.
The Articles must include your corporation's name, the number of shares authorized to issue, the registered agent's name and Wisconsin street address, and the incorporator's signature. If you authorize more than 1 class of shares, you'll also need to describe the preferences and rights of each class under Wisconsin Statutes § 180.0202.
Online filings are paid by credit card through the DFI portal. Mailed filings require a check or money order payable to the Wisconsin DFI. You can also file through the Wisconsin One Stop Business Portal, which routes you to the DFI filing interface and lets you register with multiple state agencies in one session.
Step 4: Get an EIN from the IRS
An Employer Identification Number (EIN) is your corporation's federal tax ID. You'll need it to open a business bank account, hire employees, and file federal and Wisconsin state tax returns. Apply for an EIN for free at irs.gov/ein — the IRS issues it immediately when you apply online.
Step 5: Write your corporate bylaws
Bylaws are the internal rules that govern how your corporation operates — how directors are elected, how meetings are called, how decisions get made, and how officers are appointed. Wisconsin doesn't require you to file bylaws with the DFI, but you do need to adopt them and keep them on file with your corporate records.
Bylaws matter most when there's a dispute between shareholders or directors. Having clear rules in place from the start is a lot easier than trying to reconstruct them after a disagreement. A legal professional can help you draft bylaws that fit your ownership structure.
Step 6: Register with the Wisconsin Department of Revenue
After your corporation is formed, you'll need to register with the Wisconsin Department of Revenue (DOR) if you'll have employees, make taxable sales in Wisconsin, or owe other state business taxes. The DOR's Business Tax Registration (BTR) system handles sales and use tax permits, employer withholding tax accounts, and other state tax registrations.
You can register with the DOR through the Wisconsin One Stop Business Portal, which connects your DFI formation filing to the DOR registration in one workflow. Wisconsin's corporate income tax rate is 7.9% on net income. A tax professional can help you figure out which registrations apply to your business.
Step 7: File annual reports to stay in good standing
Wisconsin corporations must file an annual report with the DFI each year to stay in good standing. The due date depends on when your corporation was originally formed — Wisconsin uses an anniversary-quarter system, not a single statewide deadline.
Annual reports are filed with the DFI — not the Secretary of State. Foreign corporations registered to do business in Wisconsin generally file by March 31 each year. Missing your annual report deadline can put your corporation's good standing at risk, so mark the date as soon as you form.
C Corp vs. S Corp in Wisconsin
Wisconsin doesn't distinguish between C Corps and S Corps at the formation stage — you form the same entity with the DFI either way. The difference is a federal tax election you make with the IRS after your corporation exists.
A C Corporation is taxed as its own entity at the federal corporate rate. Profits distributed to shareholders are taxed again as dividends — what's often called double taxation. C Corps can have unlimited shareholders and multiple share classes, which makes them the standard choice for businesses planning to raise outside investment.
An S Corporation passes income and losses through to shareholders' personal tax returns, avoiding the double-taxation issue. But S Corps come with restrictions: no more than 100 shareholders, all of whom must be U.S. citizens or residents, and only 1 class of stock is allowed. To elect S Corp status, file IRS Form 2553 after your corporation is formed. A tax professional can help you figure out which structure fits your situation.
FAQ
The Wisconsin state filing fee for Articles of Incorporation is $100, paid to the Wisconsin Department of Financial Institutions. Online filings are paid by credit card; mailed filings require a check or money order. That $100 covers the formation filing itself — you'll also need to budget for your registered agent and any professional fees.
To incorporate in Wisconsin, choose a unique name with a corporate designator, designate a registered agent with a Wisconsin street address, and file Articles of Incorporation with the Wisconsin DFI — online or by mail — along with the $100 state fee. After formation, get an EIN from the IRS, adopt corporate bylaws, and register with the Wisconsin Department of Revenue if you'll have employees or make taxable sales.
You form a standard Wisconsin corporation with the DFI first — the formation process is the same as for a C Corp. After the state approves your Articles of Incorporation, you elect S Corp tax status by filing IRS Form 2553 with the IRS. The election must generally be filed within 75 days of formation to take effect for the current tax year. A tax professional can help you figure out the right timing.
Wisconsin taxes C Corporation net income at a flat rate of 7.9%. There is no separate minimum franchise tax for most Wisconsin corporations — the tax is based on net income, so a corporation with no net income generally owes no Wisconsin corporate income tax for that year. S Corps, which pass income through to shareholders, are not subject to the corporate income tax at the entity level. Talk to a tax professional to confirm how Wisconsin's rules apply to your specific situation.
Yes. Wisconsin law requires every corporation to continuously maintain a registered agent with a physical street address in Wisconsin — a P.O. box doesn't satisfy the requirement. The registered agent receives official state communications and service of process on your corporation's behalf. You can serve as your own registered agent if you have a Wisconsin street address, or you can use a professional registered agent service.
It depends on when your corporation was formed. Wisconsin uses an anniversary-quarter system: your annual report is due by the last day of the calendar quarter in which your formation anniversary falls. For example, if you incorporated on June 15, your annual report is due by June 30 each year. Annual reports are filed with the Wisconsin DFI, not the Secretary of State.
Yes. Wisconsin doesn't require an attorney to file Articles of Incorporation — you can file directly with the DFI online or by mail. That said, a legal professional can be useful for drafting bylaws, structuring share classes, or navigating a more complex ownership arrangement. For a straightforward single-founder corporation, many entrepreneurs handle the formation filing on their own or through a formation platform.
