How to Start a Plumbing Business in Australia (2026 Complete Guide)
Summary (TL;DR)
Starting a plumbing business in Australia requires a QBCC licence (QLD), ABN, public liability insurance ($10–20M), professional indemnity insurance, a registered business name, and a plan for pricing, marketing, and compliance. This guide covers every step from apprenticeship completion to landing your first paying customers.
Step 1: Get Your Plumbing Licence
Before you can operate as a plumbing contractor in Queensland, you need a QBCC (Queensland Building and Construction Commission) licence. This is non-negotiable — performing plumbing work without a licence carries penalties of up to $46,575 for individuals.
QBCC Licence Classes for Plumbers
- Hydraulic Services — Class 1: Plumbing, drainage, gas fitting, water supply, sanitary plumbing, stormwater
- Mechanical Services — Class 2: Fire protection, air conditioning, medical gas
Requirements
- Completed apprenticeship (Certificate III in Plumbing)
- Minimum 4 years practical experience (including apprenticeship)
- Pass the QBCC technical exam
- Financial requirements (minimum net tangible assets based on turnover category)
- Current electrical safety awareness training
Step 2: Register Your Business
Once you have your QBCC licence, you need to set up the legal structure of your business:
- ABN (Australian Business Number): Free to register at abr.gov.au. Takes 5 minutes online.
- Business Name: Register with ASIC if trading under anything other than your personal name ($39/year).
- GST Registration: Mandatory once your turnover exceeds $75,000/year. Register voluntarily from day one if you expect to hit this quickly.
- Business Structure: Sole trader (simplest), partnership, company (Pty Ltd), or trust. Most plumbers start as sole traders and restructure later once revenue grows.
Step 3: Insurance (Non-Negotiable)
You cannot operate without insurance. Most builders and property managers won't engage you without proof of cover:
- Public Liability: Minimum $10 million (many commercial sites require $20M). Covers damage to property or injury to third parties. Expect $800–$2,000/year for a sole trader.
- Professional Indemnity: Covers you if your advice or design work causes a loss. Required for hydraulic design work.
- Workers Compensation: Mandatory if you employ anyone (even one apprentice). In QLD, get this through WorkCover Queensland.
- Tool & Equipment Insurance: Optional but recommended. Covers theft from your van.
- Income Protection: Covers you if you're injured and can't work. Critical for sole traders with no sick leave.
Step 4: Set Your Pricing
This is where most new plumbing businesses get it wrong. You need to charge enough to cover your desired salary, vehicle costs, tools, insurance, QBCC fees, software, superannuation, and non-billable time (typically 30–40% of your week).
Use our free hourly rate calculator to figure out your minimum charge-out rate. Most sole-trader plumbers in SEQ charge between $85–$130/hour (ex GST) in 2026.
Step 5: Essential Tools & Software
Beyond your physical tools, you need business software for job management, quoting, invoicing, compliance (Form 7, Form 9), and accounting. TradeDesk.now handles job management, quoting, invoicing, and compliance in one app with a Free plan, Pro from $79/month or $790/year, and Forms Only from $59/year — purpose-built for Australian plumbers.
Step 6: Get Your First Customers
- Tell everyone you know: Friends, family, former colleagues. Word of mouth is still #1 for trades.
- Google Business Profile: Set up immediately. Free. Shows up in local "plumber near me" searches.
- Facebook local groups: Join your suburb/area community groups. Answer questions. Be helpful.
- Subcontract initially: Work under larger plumbing companies while building your own client base.
- Real estate agents: Drop in to local agencies. They always need reliable plumbers for rental maintenance.
Step 7: Stay Compliant from Day One
Build good habits from the start: lodge Form 7 within 10 business days, lodge Form 9 after every backflow test, keep photo records of all rough-ins, maintain your QBCC CPD requirements, and renew your licence on time. TradeDesk.now automates most of this — it reminds you to lodge forms, generates compliance certificates, and keeps a digital record of every job.
Common Mistakes to Avoid
- Undercharging: Don't compete on price. Compete on reliability, quality, and communication.
- No written quotes: Always provide a written quote. Verbal agreements lead to disputes.
- Ignoring admin: Set aside 2 hours every Friday for invoicing, quoting, and compliance.
- No emergency fund: Keep 3 months of expenses in reserve. Quiet periods happen.
- Trying to do everything: Specialise. Maintenance, new builds, gas fitting — pick one to start.