How to Write a Plumbing Invoice (with Examples)

TL;DR — What Every Plumbing Invoice Needs

• The words "Tax Invoice" (if registered for GST)
• Your business name and ABN
• Your contact details
• Customer name and address
• Unique invoice number
• Invoice date and payment due date
• Description of work performed
• Line items with quantities and rates
• Subtotal, GST amount and total
• Payment details (BSB and account number)

Step-by-Step: How to Write a Plumbing Invoice

1. Add your business details: Business name, ABN, address, phone and email at the top of the invoice.
2. Add the customer details: Customer name, address and contact details. For commercial clients, include the company name and billing address.
3. Add an invoice number: Use a sequential number (e.g. INV-001). This is required for accounting and makes it easy to track payments.
4. Add the date: The date the invoice is issued. Also add a payment due date (e.g. "Due: 14 days from invoice date").
5. Describe the work: List each line item clearly. Include the call-out fee, labour hours and rate, and materials. Be specific — vague descriptions lead to disputes.
6. Calculate GST: If you are registered for GST, add a GST line item showing 10% of the subtotal. The total must clearly show the amount including GST.
7. Add payment details: Include your BSB and account number for bank transfer. Consider adding a note: "Payment by EFT preferred."

What to Include on a Plumbing Invoice — Detailed Checklist

• The words "Tax Invoice" prominently displayed
• Your business name (and trading name if different)
• Your ABN
• Your address, phone number and email
• Your business logo (optional but professional)
• Customer name and address
• Invoice number (unique, sequential)
• Invoice date
• Payment due date
• Call-out fee (if applicable)
• Labour: hours × hourly rate
• Materials: itemised list with quantities and prices
• After-hours surcharge (if applicable)
• Subtotal (excluding GST)
• GST amount (10%)
• Total (including GST)
• BSB and account number
• Payment terms (e.g. "Due within 14 days")
• Late payment terms (optional)

Wording Examples for Common Plumbing Jobs

See our full plumbing invoice wording guide for copy-paste examples. Common line items include:

• Service call — first hour: $120.00
• Additional labour @ $100/hr × 1.5 hrs: $150.00
• Materials — see itemised list: $85.00
• After-hours surcharge (1.5×): $60.00

Common Mistakes on Plumbing Invoices

• Forgetting to include the ABN
• Not showing GST as a separate line item
• Using vague descriptions like "plumbing work" instead of specific line items
• Not including a payment due date
• Forgetting to include bank details
• Not numbering invoices sequentially

Get the Free Template

Download our free plumbing invoice template in PDF, Word or Excel — all fields pre-labelled and ready to fill in.