Last updated: February 25, 2026
Wisconsin combines a business-friendly regulatory environment with affordable startup costs, making it an attractive state for new entrepreneurs. LLC formation through the Department of Financial Institutions (DFI) costs just $130 online, and the annual report is only $25 – among the lowest in the country. The state’s 5% sales tax rate is straightforward, though most counties add 0.5% and Milwaukee has additional local taxes pushing the combined rate up to 7.9%.
Wisconsin has a four-bracket income tax system with rates from 3.50% to 7.65%, no franchise tax on LLCs, and a workers’ compensation threshold that kicks in at 3 employees (or when wages exceed $500 in a quarter). The state also stands out for having no mandatory DBA registration requirement – a rarity among states. This guide walks you through every step of starting your Wisconsin business using official state government sources.
How to Start a Business in Wisconsin (Step by Step)
Step 1: Choose Your Business Structure
Your business structure determines your personal liability, tax treatment, and ongoing paperwork. The most common options in Wisconsin:
- Sole Proprietorship – Simplest to start. No state filing required with DFI. You’re personally liable for all business debts.
- LLC (Limited Liability Company) – Most popular choice for small businesses. Protects personal assets, offers flexible tax treatment, and is straightforward to form in Wisconsin.
- Corporation (S-Corp or C-Corp) – More formal structure with shareholders, directors, and officers. Better for businesses seeking investors or planning to go public.
- Partnership – For businesses with two or more owners. Options include general partnership (GP), limited partnership (LP), or limited liability partnership (LLP).
For most small businesses, an LLC is the right choice. Wisconsin’s $130 online filing fee and $25 annual report make it one of the more affordable states for LLC formation and maintenance.
Step 2: Register Your Business with the State
LLC Formation via DFI
Wisconsin business entities are registered through the Department of Financial Institutions (DFI) at dfi.wi.gov. Online filings are handled through the DFI online filing portal, and the state also offers the Wisconsin One Stop Business Portal which can register you with multiple agencies simultaneously.
| Item | Cost |
|---|---|
| Articles of Organization – Online | $130 |
| Articles of Organization – Paper (Form CORP 502) | $170 |
| Next business day expedited processing | +$25 |
| In-person expedited – 4 hours | +$250 |
| In-person expedited – 1 hour | +$500 |
| Annual Report (online) | $25/year |
| Annual Report (paper) | $40/year |
| Trademark/Trade Name registration (optional) | $15 |
How to file:
- Go to the DFI online filing portal and select “Limited Liability Company” to file Articles of Organization
- Choose a business name that includes “LLC,” “L.L.C.,” or “Limited Liability Company” – check name availability through the DFI corporate records search
- Designate a registered agent with a physical Wisconsin address – this can be yourself, another Wisconsin resident, or a registered agent service
- Pay the $130 filing fee by Visa, MasterCard, Discover, or American Express
- Online filings are typically accepted upon receipt with immediate confirmation
Annual Report
Wisconsin LLCs must file an Annual Report with DFI each year. The filing fee is $25 online ($40 paper), due during the calendar quarter in which your LLC’s organization anniversary date falls. For example, if you formed your LLC on August 15, your annual report is due anytime between July 1 and September 30 each year.
Your first annual report is due the year after your LLC was organized. Late reports incur a $25 penalty per delinquent year. File online at onestop.wi.gov/DFIannualreports.
Operating Agreement
Wisconsin law does not require an LLC operating agreement, but having one is strongly recommended. It outlines member rights, profit/loss sharing, management structure, and what happens if a member leaves. Keep it with your business records – it does not need to be filed with DFI.
Trade Name (DBA)
Wisconsin is unusual in that DBA registration is not required by statute. The state recognizes common law trade names, meaning the first business to use a name owns it whether registered or not. However, you can voluntarily register a trade name (trademark) with DFI for $15 to establish public record of your name usage. You can also file a “Registration of Firm Name” with your county’s Register of Deeds – this is required for sole proprietorships or partnerships that want to obtain credit under a DBA name.
Federal EIN (Employer Identification Number)
After forming your LLC, apply for a free EIN from the IRS at IRS.gov. You’ll receive it immediately when applying online. You need an EIN to open a business bank account, hire employees, and file taxes.
Step 3: Get Required Licenses & Permits
Wisconsin does not have a single statewide general business license. Licensing requirements depend on your industry, location, and business activities.
Local Business Licenses
Requirements vary by municipality. Some cities like Milwaukee require a general business license from the City Clerk’s License Division, while others like Madison only license specific regulated businesses (restaurants, hotels, etc.). Contact your local clerk’s office to determine what’s required in your area.
Industry-Specific Licenses
Many industries require state-level licenses from specific agencies. The Department of Safety and Professional Services (DSPS) handles cosmetology, HVAC, and private investigator licenses. The Department of Agriculture, Trade and Consumer Protection (DATCP) regulates food service and pesticide applicators. The Department of Children and Families (DCF) licenses daycare providers. See our industry-specific guides below for detailed requirements.
Seller’s Permit
If your business sells taxable goods or services, you need a Seller’s Permit from the Department of Revenue. The registration fee is $20 (covers all locations) with a $10 renewal every two years. Register through the Wisconsin One Stop Business Portal.
Step 4: Register for State Taxes
Wisconsin State Income Tax
Wisconsin has a graduated income tax with four brackets. These rates apply to LLC owners through pass-through taxation:
| Taxable Income (Single Filers) | Rate |
|---|---|
| $0 – $14,680 | 3.50% |
| $14,681 – $50,480 | 4.40% |
| $50,481 – $323,290 | 5.30% |
| Over $323,290 | 7.65% |
No franchise tax on LLCs. Wisconsin does not impose a franchise tax on LLCs taxed as partnerships or disregarded entities. The Economic Development Surcharge only applies to entities filing as corporations or S-corps with $4M+ in gross receipts.
No local income tax. Unlike states such as Maryland or Ohio, Wisconsin counties and cities do not levy their own income taxes.
Wisconsin Sales Tax
If your business sells taxable goods or services, register for a Seller’s Permit with the Wisconsin Department of Revenue.
- State sales tax rate: 5%
- County tax (most counties): 0.5% (70 of 72 counties)
- Counties without county tax: Waukesha County, Winnebago County
- Milwaukee County: 0.9% county tax + 2% City of Milwaukee tax = up to 7.9% combined
- Typical combined rate: 5.5% (5% state + 0.5% county)
- Registration fee: $20 (via BTR-101 form); $10 renewal every 2 years
Employer Taxes (If Hiring Employees)
Register for employer taxes through the Wisconsin One Stop Business Portal, which registers you with both the Department of Revenue (withholding) and the Department of Workforce Development (unemployment insurance) simultaneously.
- Unemployment Insurance (UI) Tax: New non-construction employers pay 3.05% on the first $14,000 of each employee’s wages (2026 Schedule D rate). Experience-rated range: 0.00%-12.00%.
- Withholding Tax: Register with the Department of Revenue to withhold state income taxes from employee paychecks. Registration fee: $20 (covers 2-year period; $10 renewal).
Report new hires to the Wisconsin New Hire Reporting Center within 20 days of the hire date.
Step 5: Get Business Insurance
Workers’ Compensation Insurance
Wisconsin requires workers’ compensation insurance when any of these conditions are met:
| Trigger | Threshold |
|---|---|
| Employee count | 3 or more employees (full-time or part-time) – must have insurance the day the 3rd employee is hired |
| Wage threshold | 1+ employees and $500+ gross combined wages in any calendar quarter – must obtain insurance by the 10th of the next quarter’s first month |
| Farmers | 6+ employees on the same day for 20 days in a calendar year |
Sole proprietors, partners, and LLC members are exempt but may voluntarily elect coverage. Domestic servants are also exempt.
Penalties for non-compliance: 2x the unpaid premium or $750 (whichever is greater), plus up to $100/day for 7 days. DWD can order suspension of all business operations until insurance is obtained. Uninsured employers are personally liable for all injury claims.
General Liability Insurance
While not always legally mandated, general liability insurance is practically essential for most businesses. Many clients, landlords, and government contracts require proof of coverage. Industry standard: $1 million per occurrence / $2 million aggregate.
Wisconsin Business Guides by Industry
Every industry has different licensing, permit, and insurance requirements. Choose your business type for a detailed breakdown of everything you need in Wisconsin:
- How to Start a Cleaning Service in Wisconsin – Sales tax rules, bonding, insurance, and the routine vs. one-time cleaning tax distinction
- How to Start a Food Truck in Wisconsin – DATCP licensing, health permits, mobile vendor rules, and city-specific requirements
- How to Start a Daycare in Wisconsin – DCF licensing, background checks, staff ratios, YoungStar quality rating, and training requirements
- How to Start an HVAC Business in Wisconsin – DSPS credentials, EPA Section 608 certification, bonding, and insurance requirements
- How to Start a Hair Salon in Wisconsin – DSPS cosmetology license, establishment permits, sanitation rules, and exam requirements
- How to Start a Landscaping Business in Wisconsin – DATCP pesticide certification, DNR regulations, equipment requirements, and workers’ comp
- How to Start a Private Investigation Business in Wisconsin – DSPS private detective license, surety bond, experience requirements, and surveillance laws
Wisconsin Business Resources & Official Links
| Resource | What It’s For |
|---|---|
| Department of Financial Institutions (DFI) | LLC/Corp formation, entity search, annual reports |
| DFI Online Filing Portal | File Articles of Organization, amendments, and dissolutions online |
| Wisconsin One Stop Business Portal | Register with multiple state agencies in one place |
| Wisconsin Department of Revenue | Sales tax, income tax, withholding tax, seller’s permit |
| Department of Workforce Development (DWD) | Unemployment insurance, workers’ comp, new hire reporting |
| DWD Workers’ Compensation Division | Workers’ comp requirements and employer resources |
| DWD Unemployment Insurance (Employers) | UI tax registration and rate information |
| Wisconsin New Hire Reporting Center | Report new employees within 20 days |
| Department of Safety and Professional Services (DSPS) | Professional and occupational licensing |
| IRS EIN Application | Free federal tax ID number |
Frequently Asked Questions
How much does it cost to start an LLC in Wisconsin?
The filing fee for Articles of Organization with DFI is $130 online ($170 for paper filing). Next business day expedited processing is available for an additional $25. After formation, the annual report costs just $25/year online (due during the quarter of your LLC’s anniversary date). Combined with a free federal EIN and a $20 seller’s permit, your total first-year cost is around $175-$200 before insurance.
Does Wisconsin have a state income tax?
Yes. Wisconsin has a four-bracket graduated income tax with rates from 3.50% to 7.65%. For single filers, the top rate kicks in at $323,290. The good news: Wisconsin has no local income taxes – unlike states such as Maryland or Ohio where counties add their own tax on top. There’s also no franchise tax on LLCs taxed as partnerships or disregarded entities.
What is the sales tax rate in Wisconsin?
The state sales tax rate is 5%. Most counties (70 of 72) add 0.5%, bringing the typical combined rate to 5.5%. Waukesha County and Winnebago County have no county tax (5% total). Milwaukee is the outlier – with a 0.9% county tax plus a 2% city tax, the combined rate reaches 7.9%.
Is workers’ compensation required in Wisconsin?
Workers’ compensation is required when you have 3 or more employees (full-time or part-time). It’s also triggered with fewer employees if you pay $500 or more in gross wages in any calendar quarter. Sole proprietors, partners, and LLC members are exempt but can opt in voluntarily. Penalties for non-compliance include fines of 2x the unpaid premium (minimum $750), up to $100/day, and DWD can shut down your business until you’re insured.
What is the annual report fee for a Wisconsin LLC?
Wisconsin LLCs pay an annual report fee of $25 online ($40 paper) to DFI. Unlike many states with a fixed deadline, Wisconsin’s annual report is due during the calendar quarter in which your LLC’s organization anniversary date falls. For example, an LLC formed on March 10 would file between January 1 and March 31 each year. Late reports incur a $25 penalty per delinquent year.
Do I need a business license in Wisconsin?
Wisconsin does not have a statewide general business license. Requirements vary by municipality – some cities (like Milwaukee) require a general business license, while others only license specific regulated industries. Many industries also require state-level professional licenses through DSPS, DATCP, DCF, or other agencies. If you sell taxable goods or services, you’ll need a Seller’s Permit ($20) from the Department of Revenue.
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