Mobile Car Wash Permit Requirements in Madison, WI

1. EIN (Employer Identification Number)

   Required if you have employees or operate as an LLC or corporation. Free from the IRS, obtained instantly online.

   Official government source

   Free·Immediate (online application)

   Free

   Immediate (online application)

2. EPA Stormwater Compliance — Clean Water Act Section 402

   Mobile car wash operations that discharge wash water are subject to the federal Clean Water Act. The EPA's National Pollutant Discharge Elimination System (NPDES) prohibits discharge of polluted wash water to storm drains or waterways without a permit. Most mobile operators achieve compliance by using containment systems and disposing of water via sanitary sewer. Larger operations (e.g., fleet washing facilities) may require an NPDES permit.

   Official government source

   Free (containment equipment: $200–$1,500)·Before first wash

   Free (containment equipment: $200–$1,500)

   Before first wash

1. Wisconsin Business Registration

   Mobile car wash and auto detailing businesses operating in Wisconsin as an LLC, corporation, or partnership register with the Wisconsin Department of Financial Institutions (DFI); Wisconsin has no Secretary of State business-filing role. Wisconsin's DBA (fictitious name) filing under Wis. Stat. 134.17 is narrow: it applies only when a name purporting to be a corporate name is used with intent to obtain credit, and it is recorded with the county Register of Deeds - not a general requirement for all trade names. An LLC is worth considering to protect personal assets, since mobile operations working at customers' properties carry inherent liability.

   Official government source

   DFI filing fees: limited liability company $130 online / $170 by paper; business corporation $100; limited partnership $70; nonstock corporation $35. Annual report thereafter $25 online ($40 by paper) for an LLC or business corporation.·DFI does not publish a guaranteed standard turnaround; paid expedited service is available at $100 (next business day), $250 (four hours, in person) or $500 (one hour, in person).

   DFI filing fees: limited liability company $130 online / $170 by paper; business corporation $100; limited partnership $70; nonstock corporation $35. Annual report thereafter $25 online ($40 by paper) for an LLC or business corporation.

   DFI does not publish a guaranteed standard turnaround; paid expedited service is available at $100 (next business day), $250 (four hours, in person) or $500 (one hour, in person).

2. Wisconsin Environmental / Stormwater Compliance

   Mobile car wash operations generate wastewater containing detergents, surfactants, oils and road grime. Wisconsin rules, consistent with federal Clean Water Act requirements, prohibit discharging this wash water to storm drains, street gutters or waterways. Operators must use a wastewater containment mat and recovery system (wet/dry vacuum or pump), or ensure wash water goes to a sanitary sewer inlet. The state agency is the Wisconsin Department of Natural Resources (DNR) - Wisconsin has no 'Department of Environmental Quality.' Operators using hazardous cleaning solvents or degreasers should check DNR hazardous waste requirements.

   Official government source

   No permit fee for ordinary mobile operations - this is a discharge prohibition and an ongoing compliance obligation, not a permit you apply for. A WPDES permit fee would apply only if DNR determines a specific discharge requires a permit.·Ongoing compliance - there is no application step for ordinary operations.

   No permit fee for ordinary mobile operations - this is a discharge prohibition and an ongoing compliance obligation, not a permit you apply for. A WPDES permit fee would apply only if DNR determines a specific discharge requires a permit.

   Ongoing compliance - there is no application step for ordinary operations.

3. Wisconsin Sales Tax Registration

   Car washing and auto detailing labor are generally NOT subject to Wisconsin sales tax - Wisconsin taxes only an enumerated list of services and car wash and detailing are not on it (WI DOR Publication 201). If you separately sell taxable tangible products such as waxes, air fresheners or merchandise, register with the Wisconsin Department of Revenue for a seller's permit and collect and remit state and county sales tax on those sales.

   Official government source

   No tax applies to car wash or detailing labor. If you make taxable product sales, the seller's permit costs $20 for the initial two-year Business Tax Registration and $10 to renew every two years (Wisconsin DOR).·Register online and the permit number arrives by email in one to two business days; the paper permit is sent seven to ten business days after the application (Wisconsin DOR).

   No tax applies to car wash or detailing labor. If you make taxable product sales, the seller's permit costs $20 for the initial two-year Business Tax Registration and $10 to renew every two years (Wisconsin DOR).

   Register online and the permit number arrives by email in one to two business days; the paper permit is sent seven to ten business days after the application (Wisconsin DOR).

1. No General Business License in Madison

   The City of Madison does not have a general/generic business license. Per the city's own guidance: 'The City of Madison does not have a generic business license. Most licenses issued by the Clerk's Office are for things that need to be inspected' - restaurants, swimming pools, hotels and similar. Mobile car wash and auto detailing operators need no city business license for the business itself; stormwater discharge rules apply separately. If operating from home, confirm zoning allows the use.

   Official government source

   $0 - no such license exists.·Not applicable.

   $0 - no such license exists.

   Not applicable.

2. Madison Stormwater Discharge Compliance for Mobile Washing

   Madison's stormwater and surface water discharges are governed by Madison General Ordinances Chapter 37, administered by City Engineering's Stormwater Utility Section. That system - over 500 miles of pipes, ponds, greenways and rain gardens - drains untreated to the Yahara River, the Sugar River, Door Creek and other local waters, which is why wash water carrying detergents, oils and road grime must not enter it. Practically: contain runoff with a portable berm or mat, recover it with a wet/dry vacuum or pump, and dispose of it to a sanitary sewer access point or a licensed disposal facility. There is no city registration or self-certification step; confirm the limits that apply to your operation with the Stormwater Section ([email protected], 608-266-4751) before your first job.

   Official government source

   $0 - Madison charges no registration, permit or inspection fee for mobile vehicle washing. The financial exposure is enforcement under MGO Ch. 37, whose forfeitures Madison does not publish as a fixed schedule.·Nothing to file and no waiting period - set up containment and a disposal arrangement before you operate.

   $0 - Madison charges no registration, permit or inspection fee for mobile vehicle washing. The financial exposure is enforcement under MGO Ch. 37, whose forfeitures Madison does not publish as a fixed schedule.

   Nothing to file and no waiting period - set up containment and a disposal arrangement before you operate.

3. No Dane County Chemical-Use Registration for Mobile Detailing

   Neither Dane County nor the City of Madison registers mobile detailing businesses for chemical use - no such programme appears among Public Health Madison & Dane County's licensing categories or on the City Clerk's list of licensed activities. You still have to keep a Safety Data Sheet for every cleaning agent, engine degreaser and solvent you use, store and dispose of them under state and federal hazardous-materials rules, and keep wash water out of storm drains.

   Official government source

   $0 - no county chemical-use registration exists.·Not applicable - there is no registration to apply for.

   $0 - no county chemical-use registration exists.

   Not applicable - there is no registration to apply for.

4. Madison - Home Business Zoning Compliance (no separate home occupation permit)

   Madison does not issue a standalone 'Home Occupation Permit.' The City's own guidance for new businesses is: 'If you are looking at opening a home business, make sure Zoning allows it.' A mobile car wash operator storing a vehicle, equipment and supplies at a Madison residence should confirm with City Zoning staff that the use is allowed in that zoning district; storing cleaning chemicals may also trigger fire code review.

   Official government source

   No standalone home occupation permit fee is published because no such permit is issued. Zoning questions: (608) 266-4551 ext. 3 or [email protected].·Not applicable - no separate permit is issued; the Zoning Counter is open by appointment.

   No standalone home occupation permit fee is published because no such permit is issued. Zoning questions: (608) 266-4551 ext. 3 or [email protected].

   Not applicable - no separate permit is issued; the Zoning Counter is open by appointment.

Official Sources

• Madison Business Licensing
• Wisconsin Environmental Quality — Water Programs
• EPA NPDES — Stormwater Discharges
• IRS EIN Application

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