Tax deductions and accounting for plumbers.
You can generally claim your tools, licence, work vehicle and specialist equipment like drain cameras against your plumbing income, as long as they relate to earning it and you can back it up with records. This guide covers the deductions plumbers claim most, how GST works on materials-heavy jobs, and how our fixed-fee Xero setup keeps your books current. We're Brisbane based and work with plumbing businesses across the country.
Updated July 2026 · Reviewed by the LINK Advisors team
What plumbers can claim.
The deductions that matter most in your trade, in rough order of value. Every one still has to pass the ATO's tests: you paid for it, it relates to earning your income, and you can show a record.
Work vehicle running costs
Your van or ute, fitted out to carry pipe, fittings and tools, is generally deductible for its business-use share under the logbook or cents-per-kilometre method. Shelving, racking and signage written on the vehicle usually count too.
Drain cameras and specialist inspection gear
CCTV drain cameras, locators and leak detection equipment are generally deductible, either claimed outright or depreciated depending on the cost and the instant asset write-off settings at the time - check the current threshold with us.
Plumbing licence and certification
Your plumbing licence, gasfitting or drainage certification renewals and any required registration fees are generally deductible.
Tools of trade
Pipe wrenches, welding and soldering equipment, power tools and hand tools bought for the job are generally deductible, split between immediate deduction and depreciation depending on cost.
Protective clothing and safety gear
Steel-cap boots, gloves and branded uniforms are generally deductible. Everyday clothes worn under overalls aren't, no matter how often you're on a wet or dirty site.
Public liability and trade insurance
Premiums for public liability, tool insurance and any professional indemnity cover tied to your plumbing work are generally deductible.
White card and safety training
Your white card, confined space or working at heights tickets and other safety training required for site work are generally deductible.
Mobile phone and data
The work-use portion of your phone and data for quoting, photos of jobs and invoicing on the go is generally deductible - track your business-use percentage.
Apprentice training costs
TAFE fees and training costs you cover for an apprentice are generally deductible as a cost of running your business.
Home admin space
If you do your quoting and invoicing from a space at home, a portion of running costs may be deductible under the ATO's fixed rate method - ask us what applies and what records to keep.
GST and BAS, without the headaches.
Plumbing work is a taxable supply, so registered plumbers charge GST on labour and materials and claim GST credits on pipe, fittings, fixtures and equipment bought to complete the job. When you mark up materials, GST applies to the full invoiced price, not just your margin on top.
Bigger jobs, especially bathroom renovations or new-build plumbing done in stages, often get billed as progress claims. Get the timing of GST on each claim right and your BAS lines up cleanly with your cashflow instead of you fronting GST on money you haven't been paid yet.
If you use subcontractors for overflow work or specialist jobs, you'll likely need to lodge a Taxable Payments Annual Report. We build this straight out of your Xero data so it's ready every August without you digging through invoices.
Sole trader, company or trust?
Plumbing carries real liability exposure, water damage, gas work and drainage issues can turn into expensive claims, so plenty of plumbers move to a company structure earlier than other trades once they're taking on regular work and building up equipment. Sole trader still suits plenty of solo operators just starting out or working mostly as a subcontractor. The right call depends on your job mix, how much equipment and cash you're building up, and your appetite for the extra reporting a company brings - worth a proper conversation as your business grows.
Run the jobs, we run the numbers.
Most plumbing businesses run their day-to-day out of a job management app like ServiceM8, Tradify or NextMinute, quoting and invoicing straight from the ute, with everything syncing into Xero. That gives you job costing you can actually trust, so you know which jobs make money and which ones are quietly costing you. We set the connection up once and keep the Xero side clean so your numbers are ready whenever you need them.
Frequently asked questions.
Can I claim my plumbing van?
Generally yes, for the portion used for work. A van fitted out with racking for pipe and fittings, used mainly for the business, will usually attract a strong deduction under the logbook or cents-per-kilometre method. We'll help you pick whichever method gets you the better, fully supportable outcome.
Can I claim my drain camera and other specialist gear?
Yes, equipment like drain cameras, locators and leak detection tools used for your plumbing work is generally deductible, either upfront or depreciated over time depending on the cost. Keep the purchase receipt and a note of what it's used for.
Do I charge GST on materials I supply for a job?
If you're GST registered, yes - GST applies to the full price you charge the client for materials, including any markup, not just your margin. You then claim GST credits on what you paid your supplier.
Should my plumbing business be a company instead of a sole trader?
It often makes sense earlier for plumbers than for some other trades, given the liability that comes with water and gas work. That said, plenty of solo operators and subcontractors do fine as sole traders early on. We look at your risk, income and growth plans before recommending a structure.
What do I need to keep for the tools and equipment I buy?
Hang onto the receipt, note what the item was for, and keep it for as long as the ATO requires. A habit of photographing receipts into an app like Dext as you buy things beats trying to reconstruct a year of purchases at tax time.
Talk to an accountant who knows plumber businesses.
Fixed monthly fees, unlimited access, 510+ five-star reviews. The first chat costs nothing.
Or call 07 3899 8311.