Plumber Permits & Licenses in Honolulu, HI

Required for all LLCs; annual report filing also required ($15 fee, due by end of anniversary month)

Ongoing requirement for active LLCs

C-37 classification specifically for plumbing contracting; requires qualifying officer with 4 years journey-level experience or equivalent

LLC must designate at least one responsible managing employee/officer with 4 years plumbing experience (3 years journey-level + 1 supervisory); exam required unless waived by experience

Required for ALL businesses with nexus in Hawaii; 4% tax rate statewide (4.5% in Honolulu County); monthly/quarterly/annual filing based on revenue

Must publish in newspaper for 3 consecutive issues in county of principal place of business

Required for all contractor licenses; workers' comp also required if employees hired

Employees performing plumbing work must hold J-P license; 4 years experience + exam required

All businesses in Hawaii, including plumbers operating as LLCs, must register for General Excise Tax (GET), which functions similarly to a sales tax but applies to most business activities. Plumbers charge GET on labor and materials. Rates vary by county: 4% on Oahu, 4.5% elsewhere. Registration is done via Form BB-1.

Required for any LLC that hires employees. Employers must register using Form HW-1 and withhold state income tax from employee wages. Filing frequency depends on liability: monthly or quarterly.

Employers must register with DLIR’s Unemployment Insurance Division. New employers pay 2.7% on first $650 of each employee’s wages annually (rate subject to experience rating). Registration can be completed via Form U-7.

Hawaii LLCs are generally pass-through entities; income flows to members who report on personal returns. However, the LLC must still register with the Department of Taxation if it earns taxable income in Hawaii. No separate entity-level income tax unless electing corporate taxation.

Plumbers operating in Honolulu must obtain a County Business License and pay an annual conveyance fee based on gross income. Other counties (e.g., Maui, Kauai, Hawaii County) may have similar requirements. Check local county websites for specifics.

Businesses in Hawaii County must file a Business Privilege Tax return annually. Plumbers are categorized under 'Contractors'. Fees are based on gross income brackets. Registration required even if no tax is due.

Maui County imposes a business tax on all persons conducting business. Plumbers must register and file annually. Returns due by January 20 each year for prior calendar year.

Kauai requires all businesses to obtain a biennial tax license. Plumbers fall under 'Contractors'. Application available online or in person.

Hawaii does not impose a traditional franchise tax. Instead, the General Excise Tax (GET) is levied on all business activities, including plumbing services. GET is collected on gross income and remitted via Form G-45. Filing frequency determined by Department of Taxation based on revenue.

Required for all LLCs with employees or multiple members. Single-member LLCs without employees may use owner’s SSN, but EIN is recommended for banking and contracting. Apply online via IRS website.

All plumbers must be licensed by the State of Hawaii. Licenses are issued by DCCA and must be renewed every two years. Requires proof of experience, exams, and insurance. Separate from tax registrations.

Required for all businesses operating in Hawaii County. Renews annually by Dec 31. Plumbers classified under NAICS 238220.

Required for all businesses in Honolulu. Annual renewal due January 1. Plumbing businesses must specify trade.

While not all single-member LLCs without employees need an EIN immediately, it is strongly recommended for banking, licensing, and contractor purposes. Plumbers often need EINs to comply with state contractor licensing and 1099 reporting.

A single-member LLC is treated as a disregarded entity unless it elects corporate taxation. Profits are reported on Schedule C (Form 1040) and subject to self-employment tax. Multi-member LLCs file as partnership (Form 1065). Plumbing income is subject to normal federal income tax rules.

Applies to all employers with employees. Plumbers may face hazards such as confined spaces, electrical risks, and chemical exposure. Required to provide hazard communication training, maintain Material Safety Data Sheets (MSDS), and report fatalities or hospitalizations within 8 hours (if employee-related). No specific federal plumbing standard, but general industry standards apply.

While most plumbing businesses operate at customer sites, if the LLC maintains an office open to clients or runs a retail counter, it must comply with ADA Title III. Website accessibility may also be required if services are booked online. Applies to all businesses serving the public regardless of size.

All businesses require this. Fees tiered: $50 (<$100k receipts), up to $500 (>$1M).

Applies countywide. Plumbing contractors must list C-37 license.

Most counties restrict home occupations: no client visits, limited signage/traffic. Honolulu requires DPP approval; similar in other counties.

Plumbing business location must comply with zoning (e.g., B-2/B-3 commercial zones). Contact county planning for verification.

Required for office/shop buildout. Plumbing work on own premises needs separate trade permit.

Size, lighting, setback restrictions per zoning district.

Plumbing shops storing flammables may require hazardous materials permit.

Verifies code compliance before business occupancy.

Annual inspection required. Required per IBC/IFC.

Mandatory for all employers with one or more employees, including part-time and family members. Sole proprietors without employees are exempt but may elect coverage. Administered under Hawaii Revised Statutes Chapter 386.

A $10,000 surety bond is required for all plumbing contractor licenses (Class A, B, or C) under Hawaii Administrative Rules Title 16, Chapter 81. Ensures compliance with state plumbing code and contract obligations.

While not mandated by general state law for all businesses, the DCCA requires proof of general liability insurance (minimum $300,000 per occurrence) as part of the plumbing contractor license application process. This is an industry-specific mandate for licensed plumbers.

Hawaii law (HRS § 287-23) requires all motor vehicles registered in the state to have liability insurance meeting minimum limits: $20,000 bodily injury per person, $40,000 per accident, and $10,000 for property damage. Applies to any vehicle used for business purposes, including plumbing service vans.

Required for any firm that disturbs paint in pre-1978 housing or child-occupied facilities (e.g., schools, daycares). Includes pipe replacement, fixture installation, or wall cutting. Requires firm certification, use of certified renovators, lead-safe work practices, and recordkeeping. Does not apply to emergency repairs or minor maintenance (less than 20 sq ft of painted surface).

Applies to all businesses advertising services. Plumbers must ensure online reviews, testimonials, or influencer endorsements are truthful and not misleading. Must disclose material connections (e.g., free service for review). Prohibits false claims about licensing, response time, or pricing.

All employers must verify identity and work authorization for every employee using Form I-9. E-Verify is not federally mandated for plumbers unless working on federal contracts. Applies regardless of business size.

Requires payment of federal minimum wage ($7.25/hour) and overtime (1.5x regular rate for hours over 40/week). Applies to plumbing employees such as apprentices or service technicians. Independent contractors must meet IRS common law test to avoid misclassification.

Requires eligible employers to provide up to 12 weeks of unpaid, job-protected leave per year for qualifying medical or family reasons. Most small plumbing LLCs in Hawaii will not meet the 50-employee threshold, but must track employee count annually.

Required if the plumbing LLC hires subcontractors (e.g., electricians, HVAC techs) and pays them $600+ in a year. Form 1099-NEC must be issued to each such contractor and filed with IRS. Applies regardless of business size.

All Hawaii LLCs must file a Biennial Statement of Information every two years. The due date is the last day of the month in which the LLC was formed. Example: If formed in March 2023, next filing due by March 31, 2025. Online filing available at https://hbrd.ehawaii.gov.

The qualifying individual (e.g., the licensed plumber) must renew their individual contractor license every two years. The business license is tied to this individual. Renewal is based on the birth month of the qualifier. Late fee of $50 applies after deadline.

Plumbing contractors must complete 12 hours of approved continuing education (CE) every two years for license renewal, including 6 hours of law and business practices and 6 hours of technical training. Courses must be pre-approved by DCCA.

Plumbers must register for a GET license and file returns. Frequency (monthly/quarterly) depends on annual tax liability. All businesses must file even if no tax is due. Neighbor counties (Hawaii, Maui, Kauai) have a 4.5% rate.

Employers must file Form 941 quarterly (due Jan 31, Apr 30, Jul 31, Oct 31). Form 940 (FUTA) due Jan 31 annually. Small employers may qualify for Form 944 (annual filing).

Employers must register with DLIR and file quarterly wage reports (Form QWR) and pay unemployment tax. New employers are assigned a standard rate until experience rating is established.

Required posters include: Federal Minimum Wage, EEO, OSHA Safety, Hawaii Workers’ Compensation, and Hawaii Paid Sick Leave. Must be visible to employees. Updated posters available at dol.gov and labor.hawaii.gov.

All employers in Hawaii must provide workers’ compensation coverage through a licensed insurer or self-insurance. Proof of coverage (Form WC-1) must be filed with DLIR.

Not mandated by Hawaii state law or DCCA for plumbing contractors. However, it is strongly recommended to protect against claims of faulty workmanship or design errors. Not a regulatory requirement; listed for informational completeness.

Not specifically required by Hawaii law. However, if a plumbing business sells and installs products, it may be considered a 'distributor' and subject to product liability under federal and common law. Insurance is not mandated but strongly recommended. Covered under general liability in many cases.

Only applicable if the plumbing business hosts events where alcohol is served or sold. Not relevant for standard plumbing operations. No requirement unless holding a liquor license under HRS Chapter 281.

Employers must file electronic wage reports (QWR) each quarter, reporting wages paid and unemployment tax due. Filed via Hawaii’s Online Tax System (OTS).

Licensed contractors must display their license number on all vehicles, websites, and advertising materials. Required for all plumbing businesses performing work over $1,000 including labor and materials.

Federal law requires businesses to keep tax records (income, expenses, employment) for at least 3 years. Hawaii Department of Taxation follows same standard. Recommended to keep for 7 years if claiming losses.

Businesses with 11+ employees must maintain OSHA Form 300 (Log of Injuries), Form 301 (Incident Report), and post Form 300A annually. Exempt if under 10 employees or low-risk industry, but plumbing may not qualify for exemption.