Plumber Permits & Licenses in Louisville, KY

Applies to contractors including plumbers; separate from city licenses

Plumbing business may qualify if no on-site client visits/storage of materials; review zoning district rules

Contractor businesses often require special review in commercial zones; see Zoning Ordinance Article 19

Required for interior build-out, plumbing rough-ins; plumbers must be KY Master Plumber licensed for work

Freestanding signs for plumbing business require zoning compliance first

Plumbing shops with customer areas require annual fire inspections

Required for business locations with security systems

Plumbing businesses with vehicle storage must meet parking ratios per LMCO 111.513

Required for all employers with one or more employees in Kentucky, including LLC members if they receive wages. Sole proprietors with no employees are exempt. Coverage must be obtained through private insurers or the Kentucky Assigned Risk Pool.

Not legally required by the state of Kentucky, but strongly recommended for risk management. Often required by commercial landlords or general contractors when working on projects.

Required for all LLCs formed in Kentucky. Annual report required separately (see below).

Required for all active LLCs.

Required for any business engaging in plumbing contracting. Must be issued to a Responsible Master Plumber employed by the LLC. Prerequisites: 2 years practical experience or approved education; pass exam (ICC exam accepted). Continuing education: 8 hours per cycle.

Business-level registration linking the LLC to its Responsible Master Plumber. Renews with Master license.

File with KY SOS and each county clerk where business operates. Not required if using exact LLC name.

Most plumber businesses need this for materials sold to customers. 6% sales tax rate.

Plumbers in Kentucky are generally required to collect sales tax on parts and fixtures used in service. Labor for repairs is typically not taxed unless combined with taxable materials. Registration is done via the Kentucky Business One Stop Portal: https://onestop.ky.gov/Pages/default.aspx

Required for all employers in Kentucky. Employers must withhold state income tax from employee wages. Registration is completed through the Kentucky Business One Stop Portal. Form 50A101 is used for registration: https://revenue.ky.gov/TaxForms/50A101.pdf

All employers with employees in Kentucky must register for unemployment insurance tax. Registration is done via the Kentucky Career Center Employer Portal: https://kycareers.ky.gov/employer-services/Pages/employer-login.aspx

All LLCs in Kentucky must pay the Limited Liability Entity Tax (LLET) annually, regardless of income or activity. This is not a franchise tax but a gross receipts tax. Form 770A must be filed yearly. More info: https://revenue.ky.gov/TaxForms/770A101.pdf

Kentucky does not impose a corporate income tax on LLCs. Instead, profits pass through to owners who report on personal returns (Form 740). Owners must file and pay Kentucky individual income tax if they are residents or earn income in-state. Non-residents with KY-source income must also file.

Many Kentucky cities (e.g., Louisville, Lexington) require a local business license or privilege tax. For example, Louisville Metro requires a Business Occupation License: https://louisvilleky.gov/business/business-licenses. Fees and requirements vary. Contact local clerk for specifics.

Required for all businesses; plumbers classify under contractor services. See fee schedule at https://louisvilleky.gov/sites/default/files/revenuecommission/Business_License_Fee_Schedule.pdf

A $10,000 surety bond is required for all plumbing contractor licenses issued by the DHBC. This is a license bond to ensure compliance with Kentucky Plumbing Code and state laws. Not required for unlicensed plumbing work or for individuals working under a licensed contractor.

Kentucky law requires all motor vehicles operated on public roads to be covered by liability insurance. Commercial auto policies are required if vehicles are used for business (e.g., transporting tools, employees, or clients). Personal auto policies typically exclude business use.

Not mandated by Kentucky law for plumbers. However, it is strongly recommended to cover claims of negligence, faulty work, or design errors. May be required by clients or general contractors on larger projects.

Not mandated by Kentucky law unless the business manufactures or sells plumbing-related products. If products are sold, this coverage protects against claims of defects causing injury or damage. Typically bundled with general liability or commercial umbrella policies.

Not applicable to standard plumbing businesses. Only required if the business holds a liquor license or serves alcohol at events. Kentucky ABC regulations apply in such cases.

Even single-member LLCs without employees may need an EIN to open a business bank account or avoid backup withholding. IRS Form SS-4 is used to apply.

A single-member LLC is disregarded for federal tax purposes and reports income on Schedule C of the owner's Form 1040. Multi-member LLCs are treated as partnerships and must file Form 1065. Profits are subject to self-employment tax via Schedule SE.

Plumbers may be exposed to hazards such as trenching, welding fumes, lead, and confined spaces. Employers must provide training, maintain OSHA Form 300 (if 10+ employees), and post OSHA's Job Safety and Health poster (Form 2206). Kentucky operates under federal OSHA jurisdiction (not a state plan).

Plumbers must ensure services are accessible to people with disabilities. This includes scheduling accessibility, service delivery (e.g., accessible service vehicles if feasible), and digital communications (e.g., websites). No physical modifications required unless the business owns or leases a fixed facility open to the public.

Under the Renovation, Repair, and Painting (RRP) Rule, plumbers who disturb painted surfaces (e.g., removing pipes, fixtures) must be certified and use lead-safe practices. Certification requires EPA-approved training. Kentucky does not have an EPA-authorized state program, so federal rules apply directly.

Plumbers must avoid deceptive or unsubstantiated claims (e.g., 'lowest prices guaranteed' without proof). Must disclose material connections and honor advertised prices. Applies to all advertising media including websites, social media, and door hangers.

All employers, including LLCs, must complete Form I-9 for each employee to verify identity and work authorization. E-Verify is not federally required unless contracting with federal agencies or in certain states, but may be used voluntarily.

Plumbers with employees must comply with federal minimum wage ($7.25/hour), overtime (1.5x regular rate after 40 hours/week), and recordkeeping requirements. Independent contractors are not covered. Some plumbing work may qualify for FLSA exemptions, but most field plumbers do not.

Covers unpaid, job-protected leave for qualifying medical and family reasons. Plumbers meeting the employee threshold must post the FMLA notice and provide eligible employees (worked 1,250 hours in past 12 months) with leave rights.

Most plumbing operations do not generate hazardous waste. If generated (e.g., from cleaning equipment with solvents), the business may need to register as a hazardous waste generator. Small Quantity Generators (100–1,000 kg/month) have reduced requirements.

Requires affirmative action plans for veterans, individuals with disabilities, and protected veterans. Not applicable to most small plumbing businesses unless bidding on federal projects.

All Kentucky LLCs must file an annual report with the Secretary of State by June 30. The report includes business name, principal address, registered agent, and management structure. This is a requirement for all LLCs, regardless of industry.

Plumbers operating as contractors in Kentucky must hold a license issued by DHBC. The license must be renewed every two years (odd-numbered years). This applies to individuals or businesses performing plumbing work exceeding $1,000 in value. Renewal requires proof of continuing education (see below).

Licensed plumbers must complete 6 hours of board-approved continuing education every two years, including at least one hour on Kentucky building codes. Courses must be from approved providers. Documentation must be retained for audit purposes.

If the LLC has employees, it must file Form 941 quarterly and Form 940 annually. If the business pays independent contractors $600 or more, Form 1099-NEC is due annually. These are federal tax reporting requirements applicable to all businesses with such obligations.

Plumbers who sell taxable goods (e.g., fixtures, water heaters) must collect and remit sales tax. Filing frequency is determined by the Department of Revenue based on sales volume. All registered sellers must file returns even if no sales occurred.

Employers must withhold state income tax from employee wages and file Form 941 with the Kentucky Department of Revenue. Frequency depends on the amount withheld.

All employers with employees must display the OSHA Job Safety and Health – It's the Law poster (OSHA 2203). Available in English and Spanish. Must be visible in a common area accessible to employees.

Employers in Kentucky must post required labor law notices, including minimum wage, workers' compensation, and unemployment insurance. These are available for free download from the Kentucky Labor Cabinet website.

All Kentucky employers with one or more employees must carry workers' compensation insurance. Plumbers with employees must ensure continuous coverage. Self-insurance is possible but requires board approval.

IRS recommends keeping employment tax records for at least 4 years. Business tax records should be kept for 3 years. Kentucky Department of Revenue follows similar guidelines. Plumbing permits and inspection records should be retained for at least 6 years per state building code recommendations.

Kentucky law requires licensed contractors to display their license number on all vehicles, advertisements, and contracts. The physical license should be available for inspection at the business location or job site upon request.

Self-employed individuals, including sole proprietors and LLC members, must make quarterly estimated tax payments if they expect to owe $1,000 or more. Payments include income and self-employment tax.

Kentucky requires individuals, including LLC owners, to make estimated tax payments if they expect to owe $500 or more in state income tax. Payments are due quarterly on the same schedule as federal estimates.

Permits required for all plumbing work exceeding $1,000 in value or involving new construction. Must be obtained from local jurisdiction or DHBC. Inspections may be required.

Many Kentucky cities require all businesses to obtain a local business license or pay an occupational tax. Check with your city finance or revenue office.