Janesville and Beloit Business Licenses: Rock County Rules and the Illinois Line

If you plan to run a business in Janesville or Beloit, start by understanding that Wisconsin does not issue a general business license. The state licenses specific activities, not businesses as a whole. Your core paperwork is short: an entity filing with the Department of Financial Institutions (DFI), a seller's permit from the Department of Revenue (DOR), and whatever license your particular activity triggers, which may come from the state, Rock County or the city. Many businesses in this area also sell or work across the state line in South Beloit, Illinois, so this guide covers both sides.

This is informational content, not legal or tax advice. It explains how the process generally works in Wisconsin and Illinois as of October 2026. Fees and rules change, so confirm every figure with the named agency before you file or pay. For a multi-state company, a food business, or any entity with employees, talk with a qualified attorney or CPA.

Materials and Information to Gather First

Have these ready before you open any government site. Most delays come from missing information, not from the filings themselves.

• Your proposed business name. An LLC name must include limited liability company, limited company, LLC or LC, and it must be distinguishable from names already on DFI records.
• Your entity type decision. A limited liability company is the most common choice for small firms. A business corporation filing fee is $100.
• A Wisconsin registered agent with a physical street address in Wisconsin. A P.O. box, mailbox service or answering service does not qualify, and the agent needs an email address on file.
• Your business address, mailing address, and the address of every location where you sell, store goods or work.
• A written list of your activities, including any food service, alcohol, door-to-door sales, contracting or other regulated work. Each one can trigger a separate license.
• A federal Employer Identification Number (EIN) from the IRS, which is free to obtain. Tax registrations often ask for it.
• A payment method for state fees and a calendar reminder for your annual report.

Step 1: Check Your Name and File the Entity With DFI

1. Search the name. Run a check in the DFI corporate records database at https://apps.dfi.wi.gov/apps/corpsearch/Search.aspx. A preliminary check helps, but the name is not final until DFI examines and files your document. If you need time, you can reserve a name for 120 days for $15 using Form CORP1 at https://dfi.wi.gov/Documents/BusinessServices/BusinessEntities/Forms/CORP1.pdf.

2. File the Articles of Organization. For an LLC, the formation document is Form 502, and the filing fee is $130 online or $170 on paper. File online through DFI's Business Entity File Online portal at https://dfi.wi.gov/Pages/BusinessServices/BusinessEntities/FileOnline.aspx. Online filings are in most cases accepted on receipt. DFI's statutory limit for processing new business filings is 5 business days. Paper filings go to the Milwaukee lockbox and take longer.

3. Name the registered agent. Every LLC must keep a registered agent with a Wisconsin registered office. The office address must match the agent's business office. The company cannot act as its own registered agent. DFI sends annual report forms and official notices to the agent's email, so use an address you check.

4. Calendar the annual report. The LLC annual report (Form 5) costs $25 online, or $40 on paper because of the $15 surcharge. It is due during the calendar quarter that contains your anniversary of organization:

   Organized between	Annual report due
   January 1 to March 31	March 31
   April 1 to June 30	June 30
   July 1 to September 30	September 30
   October 1 to December 31	December 31

Expedited DFI service is available for an added $100. Confirm current expedite options on the DFI page before you pay for them.

Step 2: Register for a Seller's Permit With DOR

Any seller of taxable products or services in Wisconsin must hold a seller's permit. The permit comes through the Department of Revenue's Business Tax Registration. It costs $20 for the initial two-year period and $10 to renew each two years after that. Apply at https://tap.revenue.wi.gov/BTR/, or register through the Wisconsin One Stop Business Portal at https://onestop.wi.gov, which can handle DFI, DOR and Workforce Development registration in one pass. If you are unsure whether your products or services are taxable, ask DOR before you assume you can skip the permit. DOR's new business guidance is at https://www.revenue.wi.gov/Pages/Businesses/New-Business-home.aspx.

Step 3: Set Up Sales Tax for Janesville and Beloit

Wisconsin's state sales tax rate is 5%. The combined rate listed for both Janesville and Beloit is 5.5%. Searches for janesville sales tax, janesville wi sales tax and beloit wi sales tax all lead to the same answer: charge the local rate for the sale's location, and confirm it on DOR's website before you configure your register or invoicing software. Rates can change, and the rate that applies depends on where the sale is delivered or taken.

Taxability is the more common mistake. Not every service is taxable in Wisconsin, and the rules for products, digital goods and labor differ. Check the category of each item you sell before you set a default tax rate.

Step 4: Janesville Licenses and the Rock County Health Department

Janesville has no general business license. What you may need is a specific license for a specific activity.

1. Solicitor license. If your activity involves soliciting, the Janesville City Clerk issues a solicitor license for $130 per year. The license period runs July 1 to June 30. Your city accounts must be current before the clerk will issue it, so check for any open balance with the city first. Ask the clerk whether your activity falls under this requirement.

2. Food and facility licensing. People searching for a janesville health department or rock county health department are usually looking for the Rock County Public Health Department (Environmental Health). It licenses and inspects restaurants and other licensed facilities across the county. Contact it early, because inspections and approvals determine when you can open. Ask what it needs before you sign a lease or buy equipment, since layout and equipment can affect approval.

Step 5: Beloit Licenses

Beloit issues its own licenses separately from Janesville. Contact the Beloit City Clerk's office and ask which license your activity requires, such as a beloit business license tied to a specific trade, a permit for an alcohol sale, or a local activity license. Beloit's clerk, not a general city business license, is where the answer comes from. Rock County Public Health Department also covers licensed facilities across the county, so confirm with the county whether your food or facility activity applies to your Beloit location.

Beloit sits in the Madison-Janesville-Beloit combined area, not the Rockford market. If your customers are in that region, plan your research around Madison and Janesville references, not Rockford.

Step 6: The Illinois Side: South Beloit

South Beloit is directly across the state line. If you have an office, employees, inventory, equipment or regular customers there, you probably need to register in Illinois as well as Wisconsin.

• Illinois entity registration. A business entity formed in Wisconsin that transacts business in Illinois generally must register there. Start with the Illinois Secretary of State at https://www.ilsos.gov and confirm the fee and form on that site.
• Illinois sales tax. Illinois sales and use tax rules apply to sales made in or delivered to Illinois, even if your business is based in Wisconsin. Confirm your registration needs with the Illinois Department of Revenue at https://tax.illinois.gov.
• Wisconsin side for an out-of-state entity. If your LLC was formed in Illinois and does business in Wisconsin, register with DFI as a foreign LLC. The Wisconsin foreign LLC annual report is $65 online or $80 on paper, due March 31. Confirm the application fee on DFI's site before filing.

Where you work and store property often matters more than where your mailing address is. A CPA can help you decide when a presence in one state creates filing or tax obligations in the other.

Fee Summary

Item	Cost	Agency
LLC Articles of Organization (Form 502)	$130 online, $170 paper	DFI
Business corporation Articles (Form 2)	$100	DFI
Name reservation (120 days)	$15	DFI
LLC annual report (Form 5)	$25 online, $40 by mail	DFI
Trade name registration (optional)	$15	DFI
Seller's permit, initial two years	$20	DOR
Seller's permit renewal, each two years	$10	DOR
Janesville solicitor license (July 1 to June 30)	$130 per year	Janesville City Clerk
Foreign LLC annual report (Wisconsin)	$65 online, $80 paper, due March 31	DFI
Registered agent change statement	$10 online, $25 paper	DFI

Fees for Rock County health licenses and for Beloit's local licenses are not listed here. Confirm them directly with the Rock County Public Health Department and the Beloit City Clerk.

Common Mistakes to Avoid

• Waiting for a general business license. Wisconsin does not issue one, so look for the license tied to your activity instead.
• Using a P.O. box as the registered agent address. The registered office must be a physical street location in Wisconsin.
• Skipping the annual report. The fee is small, but a missed filing is an avoidable problem. Put the quarter-end due date on your calendar the day you file.
• Ignoring open city balances. A Janesville solicitor license requires current city accounts, so resolve any balance before you apply.
• Setting one sales tax rate for every product. Taxability varies by item and service, so check each category.
• Planning a food opening without county input. Rock County inspection timing can control your opening date, so contact the department before you commit to a date.
• Forgetting the Illinois side. Work or sales in South Beloit can require Illinois registration even when your office is in Wisconsin.
• Assuming the trade name is protected. Trade name registration is optional, and the $15 filing does not replace a check of existing business names.

What a Finished Setup Should Look Like

If you complete these steps, you should typically have a DFI filing confirmation for your entity, a DOR seller's permit if your sales are taxable, any Janesville or Beloit license your activity requires, written confirmation from Rock County for any food or facility work, and Illinois registrations if you operate there. Timelines vary. Online DFI filings are often accepted on receipt, while local approvals and inspections depend on agency schedules and can take longer. Build those into your launch date.

When your structure, tax position or multi-state footprint gets complicated, a qualified attorney or CPA is worth the cost. Use this guide to know what to ask, then confirm every figure with the agency that issues it.