Key Takeaways
- $100 Articles of Incorporation filing fee (Form Corp-2 (online at wdfi.org)) paid to the Wisconsin Department of Financial Institutions
- Minimum 1 director required (Wis. Stat. § 180.0803)
- Annual Report (Online (wdfi.org)) due within by the end of the calendar quarter in which the corporation was incorporated, the year after formation, $25 online ($40 by paper) fee; delinquency and eventual administrative dissolution late penalty
- Flat 7.9% corporate franchise/income tax on apportioned net income (Wis. Stat. § 71.23) — no minimum tax and nothing tied to authorized shares; the economic development surcharge (3%, $25 min, $9,800 cap) kicks in only at $4M+ gross receipts
- Registered Agent with a physical Wisconsin street address required
- No publication requirement
- S-Corp election available via IRS Form 2553 within 75 days of formation; Wisconsin recognizes the federal S-Corp election automatically
- Same-day filing available through LLC Attorney at no markup on state fees
Incorporating in Wisconsin means filing Articles of Incorporation (Form Corp-2) with the Department of Financial Institutions at wdfi.org, paying a flat $100 fee, appointing at least 1 director, and keeping up with the yearly Annual Report and the state's 7.9% corporate franchise tax. Wisconsin files entities through the DFI rather than a Secretary of State, and online filings clear in about a business day. This guide walks through every step and cost of forming a Wisconsin C-Corporation, with fast filing available through LLC Attorney starting at $49.
C-Corp vs LLC in Wisconsin
Most first-time business owners in Wisconsin reach for an LLC. A Wisconsin corporation earns its place in narrower situations — chiefly when you intend to raise outside equity, grant employee stock options, or eventually sell to or merge with a larger company, where the C-Corp share structure is expected rather than optional.
Choose a Wisconsin corporation when:
- You plan to raise venture capital or institutional investment. VC firms, angels, and most institutional investors require a C-Corp structure before they write a check. Preferred stock, convertible notes, SAFEs, and board governance by class are native to corporations, not LLCs.
- You want to issue stock options to employees (ISOs). Corporations issue stock; LLCs issue membership interests. ISO and NSO option plans are available to corporations but not to LLCs.
- You expect to eventually go public or sell to a public company. Public markets operate on corporate stock mechanics.
- You are in a regulated industry where corporate structure is required or expected by licensing boards, government contracts, or institutional counterparties.
Stick with an LLC when:
- You are a small business with one or a few owners who will not need institutional investment.
- Pass-through taxation without payroll complexity is the priority.
- You do not need stock option plans or institutional investment mechanics.
Why and when to incorporate in Delaware vs your home state
Delaware is the default for startups on a venture track. Institutional investors expect it, term sheets assume it, and the Court of Chancery resolves corporate disputes faster than any general trial court. If you are raising a priced round or structuring for QSBS eligibility, incorporate in Delaware.
If you are not raising outside capital, Wisconsin is usually the better choice. A Delaware corporation operating in Wisconsin still has to register as a foreign corporation there, pay Wisconsin fees, and file a Delaware franchise tax return each March 1. That is duplicate overhead with no benefit for a business that will not seek institutional investment.
What's Unique About Corporations in Wisconsin?
Wisconsin is unusual in that business entities file with the Department of Financial Institutions rather than a Secretary of State, and the DFI's online system at wdfi.org clears most corporate filings in about a business day. The state's biggest practical advantages for a C-Corp are cost discipline and predictability: the $100 Articles fee is flat regardless of share count, there is no minimum franchise tax, and the corporate tax is a single flat 7.9% rate rather than a bracketed schedule. The economic development surcharge only reaches corporations once they cross $4 million in gross receipts, so early-stage Wisconsin corporations keep their recurring state burden low.
Key Wisconsin-specific requirements:
- Articles of Incorporation (not "Articles of Organization" — that is the LLC filing document)
- Minimum of 1 director, who must be a natural person (Wis. Stat. § 180.0803); no Wisconsin residency requirement
- Flat 7.9% corporate franchise/income tax on apportioned net income (Wis. Stat. § 71.23) — no minimum tax and nothing tied to authorized shares; the economic development surcharge (3%, $25 min, $9,800 cap) kicks in only at $4M+ gross receipts
- Annual Report due by the end of your incorporation quarter (March 31, June 30, September 30, or December 31), not a fixed calendar date
- Filed and maintained through the DFI at wdfi.org — Wisconsin's filing authority for corporations, distinct from a Secretary of State office
Selecting a Name for Your Wisconsin Corporation
Your corporation's name must comply with Wisconsin naming requirements:
- Must include "Corporation," "Incorporated," "Inc.," "Corp.," or another Wisconsin-approved designator (Wis. Stat. § 180.0401)
- Must be distinguishable from all existing Wisconsin entities in the DFI Corporate Records search
- Wisconsin corporate names must contain Corporation, Incorporated, Company, Limited, or an abbreviation of one of these, and the name cannot imply a purpose the corporation is not authorized to pursue
- Names implying government affiliation or banking activity are restricted
Search the DFI Corporate Records search at wdfi.org before filing. Your name search is not a reservation — the name can be registered by another filer while you prepare your Articles of Incorporation.
Name reservation: file a name reservation with the Wisconsin Department of Financial Institutions, $15 fee, holding the name for 120 days. Recommended if your paperwork takes more than a few days to prepare.
Directors, Officers, and Shareholders in a Wisconsin Corporation
A Wisconsin corporation has three distinct roles:
Shareholders own the corporation. They hold stock and vote on major decisions — electing directors, approving mergers, authorizing major asset sales. Shareholders do not manage day-to-day operations.
Directors govern the corporation through a Board of Directors. They set strategic direction, authorize major transactions, and oversee management. Wisconsin's director requirements: Wisconsin requires a board of at least 1 director (Wis. Stat. § 180.0803), and directors must be natural persons. There is no Wisconsin residency or U.S. citizenship requirement, and the exact number is fixed in the Articles of Incorporation or the bylaws. The Articles do not have to name the initial directors when the incorporator appoints them in the organizational consent.
Officers (CEO, CFO, Secretary, etc.) manage day-to-day operations. Officers are appointed by the Board of Directors. Wisconsin requires the officers described in the bylaws, and the same individual may simultaneously hold the offices of president and secretary. One person can be the sole director and hold every officer role at once, which is the ordinary setup for a closely held Wisconsin corporation.
Designating a Registered Agent
Every Wisconsin corporation must designate a Registered Agent — a person or entity with a physical Wisconsin street address who receives legal notices, lawsuits, and official state correspondence on behalf of your corporation.
Every Wisconsin corporation must continuously maintain a registered agent with a physical Wisconsin street address (Wis. Stat. § 180.0501); a P.O. box alone does not satisfy the requirement. The agent must be available during normal business hours to accept service of process and forward DFI correspondence. A natural-person agent must reside in Wisconsin, or you may appoint a corporation or registered-agent service authorized to do business in the state.
If the Wisconsin Department of Financial Institutions cannot deliver legal notices to your Registered Agent, Wisconsin can administratively administratively dissolve your corporation. LLC Attorney's Wisconsin Registered Agent service is $125/year.
Wisconsin Corporation Costs and Compliance
How to Form a Corporation in Wisconsin
If You Do It Yourself
Step 1 — Choose a corporate name that complies with Wisconsin's requirements.
Your corporate name must be distinguishable from all existing Wisconsin entities and include an approved corporate designator ("Inc.," "Corp.," "Corporation," "Incorporated," or as specified in Wis. Stat. § 180.0401). Search the DFI Corporate Records search at wdfi.org before preparing any documents. Wisconsin's name check at wdfi.org confirms availability against the DFI database but not trademark rights — clear the name against the USPTO register separately if you intend to build a brand on it.
Step 2 — Reserve your corporate name (recommended).
File a name reservation with the Wisconsin Department of Financial Institutions, $15 fee, good for 120 days. If you are not filing immediately, this prevents another entity from taking your name while you prepare documents.
Step 3 — Decide your director structure before opening the formation form.
Wisconsin requires 1 director at formation. A single founder can be the entire board. Set the board size in the bylaws so you can add directors later by board or shareholder action rather than amending the Articles. If you plan to bring on investors or a partner, decide now whether to write the bylaws around a fixed number or a permissible range of directors. Write down your director names and Wisconsin addresses before you open the form — most state portals cannot save a partially completed filing.
Step 4 — Designate your Registered Agent.
Every Wisconsin corporation must have a Registered Agent with a physical Wisconsin street address. P.O. boxes are not accepted. Many Wisconsin corporations use a commercial registered agent to keep an owner's home address out of the public DFI database. LLC Attorney can serve as your Wisconsin Registered Agent and forward all state and legal mail to your client portal.
Step 5 — Complete the Articles of Incorporation (Form Corp-2 (online at wdfi.org)).
Go to wdfi.org and use the current version of the Articles of Incorporation. Always file directly through the Wisconsin Department of Financial Institutions — outdated forms are rejected without refund. Complete it with:
- Your exact corporate name including designator
- Your Registered Agent — full legal name and physical Wisconsin street address
- Your authorized share structure — state a share count that fits your cap table — Wisconsin charges a flat $100 regardless of how many shares you authorize, so there is no fee penalty for authorizing a generous block up front
- Director names and addresses
- Incorporator signature (the person submitting the form; need not be a director or shareholder)
- The number of shares the corporation is authorized to issue (Wisconsin requires this in the Articles but attaches no fee to the amount)
Step 6 — File the Articles of Incorporation and pay the $100 fee.
File online at wdfi.org or by mail to the Wisconsin Department of Financial Institutions in Madison. Online processing is same day to 1 business day for online filings under normal volume.
- 24-hour service: $100 additional (total: $200)
- In-person 4-hour service: $250 additional (total: $350)
- Because Wisconsin online filings already clear in about one business day, the expedite tiers are rarely worth paying for unless you are filing on paper or need a same-hour turnaround at the Madison counter.
Step 7 — Wait for your approved Articles of Incorporation.
Your corporation does not legally exist during the review period. You cannot open bank accounts, sign contracts as the corporation, or issue stock until the Wisconsin Department of Financial Institutions approves your filing. Standard processing is same day to 1 business day for online filings; 1 to 2 weeks for mailed paper filings during peak filing season. Keep your approved Articles of Incorporation — every bank, licensing board, and counterparty will request it.
Step 8 — Hold your organizational meeting and adopt bylaws.
After approval, your Board of Directors must hold an organizational meeting (or sign a written consent in lieu of meeting) to adopt bylaws, elect officers, authorize the bank account, authorize stock issuance, and set the fiscal year. Wisconsin does not require bylaws to be filed with the Department of Financial Institutions (DFI) — keep them with your corporate records. Wisconsin bylaws are adopted by the incorporator or initial board under Wis. Stat. § 180.0206 and govern board meetings, officer duties, and share transfers — draft them to match how the company will actually operate rather than filing the Articles and skipping this step. A generic template may omit Wisconsin-specific provisions and may not align with your share structure.
Step 9 — Issue stock to founders.
Authorize and issue shares to founders immediately after your organizational meeting. Document the issuance in your stock ledger and issue stock certificates (or maintain uncertificated share records). Each founder's share count and issuance price must be documented. Wisconsin does not tie any tax or filing fee to your authorized share count, unlike Delaware. Authorize enough shares to cover founder stock, an option pool, and a future raise so you do not have to amend the Articles ($40) before issuing equity, but there is no cost reason to inflate the number into the millions.
Step 10 — File your initial Annual Report (Online (wdfi.org)) within by the end of the calendar quarter in which the corporation was incorporated, the year after formation.
After your Articles of Incorporation is approved, you have by the end of the calendar quarter in which the corporation was incorporated, the year after formation to file Online (wdfi.org) with the Wisconsin Department of Financial Institutions. This filing confirms your Registered Agent address, principal office address, and director and officer contact information. Filing fee: $25 online ($40 by paper). Missing the deadline triggers a delinquency and eventual administrative dissolution penalty.
Step 11 — Apply for your federal EIN.
Your corporation needs an EIN to open a bank account, hire employees, and handle tax filings. Apply at irs.gov/ein. Free, no government filing fee. Available Monday through Friday, 7 a.m. to 10 p.m. Eastern. 15-minute inactivity timeout — have all information ready before starting. International incorporators without a U.S. SSN or ITIN must apply by phone (IRS Form SS-4, 267-941-1099).
Step 12 — Open a corporate bank account.
Required documents: your approved Articles of Incorporation, your EIN confirmation letter (IRS Form CP 575 or SS-4 approval), your adopted bylaws, a board resolution authorizing the account, and personal ID of authorized signers. Call ahead — bank requirements for corporations are more involved than for LLCs.
Step 13 — Register for Wisconsin state taxes.
Your federal EIN does not automatically register you with Wisconsin state agencies. Depending on your business type:
- Wisconsin sales and use tax (Wisconsin Department of Revenue, if you sell taxable goods or services) — revenue.wi.gov
- Wisconsin employer payroll taxes (Wisconsin Department of Workforce Development, if hiring Wisconsin employees) — dwd.wisconsin.gov
- Wisconsin sales and use tax permit (Department of Revenue) — required before selling taxable goods or services; the state rate is 5% with most counties adding 0.5%
Step 14 — Pay your Wisconsin annual tax.
Wisconsin calls its corporate tax a franchise tax, but it is assessed on net income at a flat 7.9% rate rather than on capital or share count. File Form 4 with the Wisconsin Department of Revenue by the 15th day of the fourth month after your fiscal year closes (April 15 for calendar-year filers). If your total tax and surcharge will reach $500 or more, you must pay quarterly estimates during the year. Corporations with gross receipts of $4 million or more add the economic development surcharge — 3% of the tax, with a $25 floor and a $9,800 ceiling. There is no Delaware-style minimum franchise tax to pay simply for existing.
Step 15 — Decide whether to elect S-Corp tax treatment.
C-Corporation income is taxed twice: once at the corporate level (federal rate currently 21%), and again when distributed to shareholders as dividends. An S-Corp election converts the corporation to pass-through taxation. S-Corp election is available for Wisconsin corporations that meet IRS eligibility: 100 or fewer shareholders, all U.S. citizens or residents, only one class of stock, and no institutional or foreign shareholders. File IRS Form 2553 within 75 days of formation. The election is made with the IRS — it does not require any Wisconsin filing. Wisconsin automatically recognizes a valid federal S-Corp election for state purposes, so a tax-option (S) corporation generally does not pay the 7.9% corporate franchise tax at the entity level — income flows through to shareholders, who report it on their Wisconsin returns at the individual rates (up to 7.65%). Wisconsin also offers an elective pass-through entity tax that lets the corporation pay tax at the entity level to work around the federal SALT cap. An S-Corp can opt out of Wisconsin treatment, and the economic development surcharge still applies to electing S-Corps at 0.2% of Wisconsin net income (minimum $25), so model the trade-offs before electing.
Step 16 — Set annual compliance reminders.
Wisconsin corporations must file and pay on a recurring basis:
- Annual Report (Online (wdfi.org)): Annually, by the end of the anniversary quarter, $25 online ($40 by paper) fee — delinquency and eventual administrative dissolution if missed
- Corporate franchise tax: 7.9% of net income apportioned to Wisconsin, filed on Form 4 by the 15th day of the fourth month after year-end — no minimum tax, but add the 3% economic development surcharge if gross receipts reach $4 million
- Economic development surcharge — corporations with $4 million or more in gross receipts file and pay the surcharge with Form 4 (3% of tax, $25 minimum, $9,800 maximum)
Missing these filings puts your corporation in bad standing with the Wisconsin Department of Financial Institutions and Wisconsin Department of Revenue. Suspension means you cannot file documents, defend lawsuits, or do business in Wisconsin. If you would rather not manage this process, the service handles Wisconsin corporation formation starting at $49.
If LLC Attorney Does It for You
- Submit your information at llcattorney.com — corporate name, director structure, authorized shares, Registered Agent preference, fiscal year, and target formation date. No forms to find or download.
- LLC Attorney files your Articles of Incorporation with the Wisconsin Department of Financial Institutions, drafts your bylaws, handles your organizational meeting consent, issues your stock ledger documentation, applies for your EIN, and covers same-day filing if needed. Your Registered Agent designation and initial Annual Report are included.
- Receive your approved Articles of Incorporation, bylaws, organizational consent, stock documentation, and EIN confirmation through your LLC Attorney client portal. Annual compliance reminders are included so you never miss a Online (wdfi.org) deadline or annual tax payment.
S-Corp Election for Wisconsin Corporations — What You Need to Know
An S-Corp election is not a separate entity — it is a federal tax election made by an existing corporation. Your Wisconsin corporation remains a Wisconsin corporation; you are only changing how the IRS taxes it.
The S-Corp tax advantage: a C-Corp pays 21% federal corporate income tax on net income, and shareholders pay income tax again on dividends. An S-Corp passes income directly to shareholders' personal returns, skipping the corporate-level tax. For owner-operated businesses with consistent profitability above roughly $40,000/year, the S-Corp election typically produces material tax savings.
S-Corp payroll requirement: if you elect S-Corp status and work in the business, you must pay yourself a "reasonable salary" subject to payroll taxes. The savings come from income above that salary, which passes through without payroll tax. Skip the salary and the IRS can reclassify your distributions as wages and assess back payroll taxes plus penalties.
Eligibility requirements:
- 100 or fewer shareholders
- All shareholders must be U.S. citizens or permanent residents
- Only one class of stock (identical distribution and liquidation rights)
- No institutional shareholders, partnerships, or non-resident alien shareholders
Wisconsin treatment of S-Corps: Wisconsin automatically recognizes a valid federal S-Corp election for state purposes, so a tax-option (S) corporation generally does not pay the 7.9% corporate franchise tax at the entity level — income flows through to shareholders, who report it on their Wisconsin returns at the individual rates (up to 7.65%). Wisconsin also offers an elective pass-through entity tax that lets the corporation pay tax at the entity level to work around the federal SALT cap. An S-Corp can opt out of Wisconsin treatment, and the economic development surcharge still applies to electing S-Corps at 0.2% of Wisconsin net income (minimum $25), so model the trade-offs before electing.
Filing deadline: IRS Form 2553 must be filed within 75 days of formation, or by March 15 of the tax year for which you want the election effective. Late elections are sometimes accepted with a written explanation of reasonable cause.
When Should You Consult an Attorney for Your Wisconsin Corporation?
LLC Attorney provides on-demand attorney consultations for a flat rate per 30-minute session — no retainer required. Corporation formation benefits from attorney guidance more than most entity types because of share structure, bylaw complexity, and S-Corp election timing. Common scenarios:
- Multiple founders or investors: share structure decisions made at formation (authorized shares, classes, par value) affect every future financing round and exit. A misstructured cap table is expensive to unwind.
- S-Corp election analysis: whether to elect depends on projected net income, payroll requirements, and state-level S-Corp recognition. The payroll requirement catches founders off guard.
- High-liability industry: regulated industries may have specific corporate structure requirements from licensing boards or insurance carriers.
- Raising capital: if you plan to raise institutional capital, your share structure, option pool, and Delaware vs. home-state decision should be reviewed before you file.
- Wisconsin-specific wrinkles: Wisconsin may have corporate law provisions a generic national template does not cover correctly.
What You Actually Get When You Incorporate in Wisconsin with LLC Attorney
A Wisconsin corporation that has only been filed with the DFI is not a finished corporation. The $100 filing brings the entity into existence; it does not give you the bylaws, board consents, or stock ledger that make the corporation operate and keep the liability shield intact. A "$0 filing" that skips those is not free — it is unfinished, and an unfinished C-Corp is precisely what fails review when an investor, lender, or buyer looks at your records.
Included with LLC Attorney corporation formation, starting at $100:
- Same-day or 24-hour Wisconsin filing at no markup on the state fee. Most services charge extra to expedite.
- Attorney-drafted bylaws, initial board consent, and organizational minutes — customized, not auto-generated templates.
- Initial stock issuance and cap-table setup, so your ownership is documented correctly from day one.
- Federal EIN, obtained for you.
- Wisconsin Registered Agent service at $125/year, included to keep you in good standing.
- S-Corp election guidance when pass-through tax treatment is the right call for your situation.
- Access to attorney-trained Business Success Advisors at no charge, plus optional flat-fee attorney consultations (no retainer).
Because Wisconsin keeps the filing cost low and the tax flat, the real value is in the governance documents — clean bylaws, a documented cap table, and correct organizational consents — which are exactly what is included here.
Starting Your Wisconsin Corporation with LLC Attorney
Wisconsin's corporate formation requirements are straightforward but have a few state-specific quirks — the DFI filing channel, the quarterly Annual Report deadline, and the flat 7.9% corporate franchise tax with its economic development surcharge threshold. Getting your directors, share structure, bylaws, and initial compliance filings right at formation prevents expensive corrections later.
The service handles Wisconsin corporation formation starting at $49. Same-day filing is available at no markup on state fees. On-demand attorney consultations in 30-minute increments — no retainer — cover bylaws drafting, S-Corp election analysis, Wisconsin S-Corp election timing and the pass-through entity tax decision, and annual tax planning. See our full pricing for all service tiers.
Frequently Asked Questions
Wisconsin corporate filings submitted online at wdfi.org typically clear same day to next business day. Mailed paper filings take roughly 1 to 2 weeks. Wisconsin offers expedite tiers at the Madison counter — next business day for an extra $100, in-person 4-hour service for $250, and 1-hour service for $500 — but online filings are already fast enough that most incorporators never need them.
A C-Corp and an S-Corp are the same Wisconsin corporation — the difference is federal tax treatment only. A C-Corp pays corporate income tax at the entity level (21% federal rate), and shareholders pay personal income tax again on dividends. An S-Corp elects pass-through taxation — income flows to shareholders' personal returns without corporate-level tax. The election is made with the IRS via Form 2553 and has no impact on your Wisconsin formation documents. Wisconsin honors the federal S-Corp election automatically, but the eligibility limits (100 shareholders, one class of stock, only U.S.-individual owners) still control whether you qualify.
Yes. Wisconsin permits a single individual to incorporate and run the corporation alone — serving as the sole director and holding the president, secretary, and treasurer offices simultaneously (Wis. Stat. § 180.0840 allows one person to hold multiple offices). You still must keep corporate formalities intact: adopt bylaws, document an organizational consent, issue yourself stock, file the Annual Report, and keep corporate and personal finances separate to preserve the liability shield.
A Wisconsin C-Corporation pays the state corporate franchise tax at a flat 7.9% on net income apportioned to Wisconsin (Wis. Stat. § 71.23), reported on Form 4 by the 15th day of the fourth month after year-end. Wisconsin imposes no minimum franchise tax and ties no tax to authorized shares. Corporations with $4 million or more in gross receipts also pay the economic development surcharge: 3% of the tax, with a $25 minimum and a $9,800 maximum. At the federal level, a C-Corp pays the 21% corporate income tax unless it elects S-Corp treatment, which Wisconsin recognizes.
Wisconsin corporations file an Annual Report with the Department of Financial Institutions each year, due by the end of the calendar quarter in which the corporation was originally incorporated. The fee is $25 when filed online at wdfi.org or $40 by paper. Wisconsin uses a quarterly deadline (March 31, June 30, September 30, or December 31) rather than a fixed calendar date, so your due date depends on the quarter your formation falls in. Missing it leads to delinquent status and, if uncorrected, administrative dissolution.
Wisconsin does not require corporations to file bylaws with the Department of Financial Institutions (DFI). However, bylaws are a legal requirement for corporate governance — they define how your board operates, how shareholder meetings work, how officers are appointed, and how major decisions are made. A corporation without bylaws is technically non-compliant and lacks the foundational document that governs all major corporate decisions. Every bank, investor, and serious counterparty will request your bylaws.
Wisconsin's corporate franchise tax (Form 4) is due the 15th day of the fourth month after year-end. Filing or paying late triggers interest at 12% per year on the unpaid tax plus delinquency penalties; the Department of Revenue can also assess negligence penalties. Separately, failing to file the DFI Annual Report leads to delinquent status and eventual administrative dissolution, after which the corporation loses its capacity to sue, contract, or maintain good standing until it is reinstated and brought current.
Yes. Wisconsin allows a corporation to convert to an LLC by filing Articles of Conversion with the Department of Financial Institutions under Wis. Stat. Chapter 180. The conversion is generally a taxable event for federal purposes and can trigger gain recognition at both the corporate and shareholder level, so model the tax consequences with a CPA before converting — for some corporations a dissolution and re-formation is cleaner depending on assets and basis.
If Wisconsin is unable to deliver legal notices to your Registered Agent, the state can administratively administratively dissolve your corporation. This can happen without direct notice to you. A professional Registered Agent service ensures a qualified person is available during business hours at a physical Wisconsin address to receive any legal documents on your behalf.