How to Start an LLC in Wisconsin (Step-by-Step Guide)

Forming an LLC in Wisconsin requires filing Articles of Organization with the Wisconsin Department of Financial Institutions (DFI) and paying a $130 filing fee (online) or $170 (mail). Online filings are typically processed within a few business days.

Wisconsin offers a straightforward LLC formation process with moderate costs. Follow these steps to start your Wisconsin LLC in 2026.

How to Start an LLC in Wisconsin (6 Steps)

Step 1: Name Your Wisconsin LLC

Your LLC name must be distinguishable from other business names registered with the Wisconsin DFI. The name must include “Limited Liability Company,” “LLC,” or “L.L.C.”

Search the Wisconsin Department of Financial Institutions business name database to check availability. You can reserve a name for 120 days by filing an Application for Reservation ($15 fee).

Wisconsin naming rules:

• Must be distinguishable from any existing business entity registered with the DFI
• Cannot include words implying the LLC is a bank, insurance company, or government agency without proper authorization
• Must contain an LLC designator (“Limited Liability Company,” “LLC,” or “L.L.C.”)
• Cannot use restricted words without meeting additional licensing requirements

Step 2: Choose a Registered Agent

Wisconsin requires every LLC to have a registered agent with a physical street address in Wisconsin. The registered agent receives legal documents, service of process, and official state correspondence on behalf of your LLC.

You can serve as your own registered agent (if you have a Wisconsin address), or hire a professional service. Our top recommendation is Northwest Registered Agent ($39/year), which also handles LLC formation for $39 + the $130 state fee.

Step 3: File Your Articles of Organization

File your Articles of Organization with the Wisconsin Department of Financial Institutions. You can file online through the DFI online filing system or by mail.

Filing details:

• Filing fee: $130 (online), $170 (mail)
• Online filing: Wisconsin DFI online portal (recommended — lower fee and faster processing)
• Processing time: 2-5 business days (standard)
• Expedited processing: Available for an additional $25

Information required:

• LLC name
• Registered agent name and address
• Principal office address
• Organizer name and address
• Whether the LLC is member-managed or manager-managed
• Effective date (can be the filing date or a future date)

Step 4: Create an Operating Agreement

Wisconsin doesn’t legally require an operating agreement, but having one is strongly recommended. An operating agreement defines ownership percentages, management responsibilities, profit distribution, and procedures for resolving disputes or changing membership.

Without an operating agreement, Wisconsin’s default LLC rules will govern your business. Most banks also require an operating agreement to open a business bank account.

Step 5: Get an EIN

Apply for an Employer Identification Number (EIN) through the IRS website. It’s free and takes about 15 minutes online. You need an EIN to open a business bank account, hire employees, and file taxes.

All multi-member LLCs need an EIN. Single-member LLCs can use the owner’s SSN but obtaining a separate EIN is recommended for privacy and separation of personal and business finances.

Step 6: Register for Wisconsin Taxes

After forming your LLC, register with the Wisconsin Department of Revenue for applicable state taxes. Wisconsin imposes an income tax on LLC members’ share of profits.

Tax registration details:

• State income tax: Progressive rates from 3.5% to 7.65% (passed through to members’ personal returns)
• Sales tax registration: Required if you sell taxable goods or services in Wisconsin
• Employer registration: Required if you have employees

Register online through the Wisconsin Department of Revenue website.

Wisconsin LLC Costs

Total first-year cost: $130-$429 (depending on registered agent service and optional fees). Wisconsin’s ongoing costs are modest, with only a $25 annual report fee. See our complete guide to LLC costs by state.

Wisconsin LLC Taxes

Wisconsin imposes a progressive income tax on LLC members’ share of profits, which passes through to their personal returns.

• State income tax: Progressive rates from 3.5% to 7.65% (LLC profits pass through to members’ personal returns)
• Corporate income tax: 7.9% flat rate (if LLC elects corporate taxation)
• Franchise tax: None for standard LLCs
• Sales tax: 5% state rate, plus up to 0.6% county tax (combined rates range from 5% to 5.6%)
• Federal taxes: Standard pass-through taxation — profits pass to members’ personal federal returns

Annual Requirements for Wisconsin LLCs

• Annual report: Due by the end of the calendar quarter in which your LLC was formed. Fee is $25. For example, if your LLC was formed in July, your annual report is due by September 30 each year.
• State income tax: File a Wisconsin individual income tax return reporting your share of LLC profits. Partnership and S corporation returns are due by March 15 for calendar-year filers.
• Maintain a registered agent: Must have a registered agent with a physical Wisconsin address at all times.
• Sales tax filing: If applicable, collect and remit Wisconsin sales tax according to your assigned filing frequency.

Frequently Asked Questions

How long does it take to form an LLC in Wisconsin?

Online filings through the Wisconsin DFI are typically processed within 2-5 business days. Expedited processing is available for an additional $25. Filing online is recommended because it’s both faster and $40 cheaper than mail filing ($130 vs. $170).

Why does mail filing cost more than online filing in Wisconsin?

Wisconsin charges $130 for online filing and $170 for mail filing of Articles of Organization. The lower online fee encourages electronic filing, which is more efficient for the Department of Financial Institutions to process.

Can I form a Wisconsin LLC if I live in another state?

Yes. You can form a Wisconsin LLC regardless of where you live. You’ll need a registered agent with a physical address in Wisconsin. If you primarily do business in another state, you’ll likely need to register as a foreign LLC there. See our how to start an LLC guide for more information.

When is the Wisconsin LLC annual report due?

The annual report is due by the end of the calendar quarter of your LLC’s formation anniversary month. The four possible due dates are March 31, June 30, September 30, or December 31. The filing fee is $25.

Does Wisconsin require an operating agreement?

No, Wisconsin does not legally require an operating agreement. However, creating one is strongly recommended. It defines ownership and management structure, strengthens your liability protection, and is typically required by banks to open a business account.

Start an LLC in Another State

Click your state below for a step-by-step formation guide with filing fees, requirements, and timelines.