Private Investigator Permits & Licenses in Madison, WI

Applicable to all private investigator licensees; includes case files, reports, and client communications.

MGO 28.165; wall signs limited to 1.5 sq ft for home occupations

Sole proprietors with no employees are exempt from the workers’ comp requirement, though they may elect coverage for themselves.

The required bond amount is $10,000. The bond can be obtained from any licensed surety provider.

While Wisconsin law does not mandate general liability insurance for private investigators, many clients and contracts require it. Recommended coverage: $1 million per occurrence/$2 million aggregate.

Required for all LLCs. Online filing recommended via SCF system.

Applies to agency owners/managers. Must designate a qualifying agent.

Individual license required for at least one qualifying agent per agency. Prerequisites: 3 years experience or equivalent, exam, background check.

Required if using trade name/DBA. Renew every 5 years? No, one-time with amendments.

Required to maintain good standing for all LLCs.

Professional liability insurance is strongly recommended for private investigators to protect against claims of negligence, errors, or omissions.

Standard personal auto policies do not satisfy the commercial use requirement.

Private investigators in Wisconsin do not sell physical products; therefore product liability insurance is not required.

Only required for businesses that manufacture, sell, or serve alcoholic beverages. Not relevant to a private investigation LLC.

All LLCs that have employees, more than one member, or elect to be taxed as a corporation must obtain an EIN.

If the LLC elects corporate taxation, it must file Form 1120; single‑member LLCs are disregarded entities and report on Schedule C of the owner’s Form 1040.

Even a single‑member LLC with no employees is not subject to employment taxes.

Private investigators typically do not need unless selling equipment/products.

Required for withholding state income taxes.

Private investigators generally provide non‑taxable services, so a permit is only required if they sell taxable goods (e.g., surveillance equipment).

Registers the LLC for Wisconsin corporate income tax (if taxed as a corporation) or partnership filing. Required for all Wisconsin‑registered entities.

LLC taxed as a corporation files Form 1; LLC taxed as a partnership files Form 3. Even a zero‑tax return must be filed.

Registration is done via the Wisconsin Business Registration portal; you receive a WI Withholding Account Number.

Electronic filing is encouraged via the WI DOR’s e‑services portal.

Registration provides a UI account number used for quarterly reporting.

Rates are employer‑specific and published annually by DWD.

The license must be displayed at the principal place of business.

Renewal can be completed online via the Madison Business Portal.

The license must be posted at the business location.

Required for most businesses including professional services; private investigators fall under general business category unless specified otherwise

Must verify property zoned for professional services (B-1, B-2 districts typically allowed)

Private investigation office allowed if no signage, traffic, or employees on premises

Complies with Milwaukee Code of Ordinances Chapter 295-201

Required for commercial occupancy; private investigator offices typically low hazard

Milwaukee Ordinance 303-71; registration required to avoid false alarm fines

Basic registration; no specific PI requirements

Private investigators with fewer than 10 employees are exempt from the record‑keeping rule but must still comply with general safety standards.

Private investigation firms that serve the public are considered places of public accommodation and must provide equal access.

Most private investigation firms do not handle hazardous waste; this requirement is listed for completeness.

Private investigators must avoid deceptive or unsubstantiated claims about services, success rates, or licensing.

Private investigators with only independent contractors are not covered, but any employee is subject to minimum wage and overtime rules.

Most small PI firms will be below the threshold, but the rule is listed for completeness.

Independent contractors are not subject to I‑9.

Most private investigators do not need an FFL unless they conduct firearms-related services.

Madison General Ordinance 28.030; professional offices allowed with restrictions

Required federal and state labor law posters include Minimum Wage, OSHA, Unemployment Insurance, etc.

Licensees must submit a summary of investigative activities performed during the preceding calendar year.

Most Wisconsin municipalities require an annual fire safety inspection for commercial premises. Verify with the city or county where the PI office is located.

All dates are calendar‑year based. Adjust deadlines that fall on weekends or state holidays to the next business day.

Most states, including Wisconsin, require a court order for such surveillance; federal law reinforces the need for proper authorization.

Even if the contractor is a fellow PI, the reporting requirement still applies.

Not applicable to most private investigators.

All Wisconsin LLCs must file an annual report with the DFI. The filing is due the last day of the calendar quarter (Q1‑Q4) that contains the anniversary of the entity’s formation date.

All private investigator licensees (including LLCs) must renew their license annually. Renewal can be completed online through the DSPS portal.

The CE requirement is 12 hours every two years. Hours may be earned through approved courses, conferences, or webinars.

The private investigator’s license number and expiration date must be visible to the public.

LLCs taxed as partnerships must file Wisconsin Form 3. If the LLC elects corporate taxation, the corporate return (Form 1) applies instead.

LLCs taxed as partnerships must file Form 1065. Extensions push the deadline to September 15.

Required if the LLC expects to owe $1,000 or more in tax for the year.

Required when the expected Wisconsin tax liability exceeds $500 for the year.

Employers must file UI-1 each quarter reporting wages and pay the employer’s UI contribution.

Employers must remit withheld state income tax and file WT‑2 each quarter.