The best plumbing software for an Australian plumber covers four jobs in one place: quote on-site, raise a GST-compliant tax invoice, take payment, and track the job — so you're not re-keying the same details into three apps.
ServiceM8 charges by job volume (free up to 30 jobs/month, then ~A$29–$349/month, AUD GST-inclusive) with unlimited users; Tradify charges per user per month (roughly A$48–$62 ex GST); simPRO is quote-based enterprise pricing with a setup fee.
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OneBookPlus is an all-in-one for AU plumbers — quoting, invoicing, bookings, jobs, payments, CRM and BAS-ready tax in one app, with a free plan ($0/month) and paid tiers from $29/month (GST inclusive).
Plumbing is licensed work in every Australian state and territory, each with its own regulator (e.g. Building Commission NSW, QBCC in QLD, the VBA in VIC) — software doesn't replace your licence or compliance certificates.
If you're registered for GST, every tax invoice over $82.50 must show your ABN, the words 'Tax invoice', the GST amount and your details — good software builds a valid tax invoice automatically.
Pick software by the workflow you do 20 times a day, not the longest feature list — for most solo and small plumbing crews, on-site quoting plus fast invoicing and card payment matters more than enterprise scheduling.
If you run a plumbing business in Australia, your software has one job: get you off the laptop and back on the tools. Between callouts, hot-water replacements, blocked drains and bathroom renos, the admin stacks up fast — quotes that need to go out tonight, invoices chasing themselves, and a diary that lives in your head and three group chats.
The right plumbing software pulls all of that into one place. This guide walks through what actually matters for an Australian plumber in 2026, compares the main players on price and fit, and shows where an all-in-one like OneBookPlus earns its keep.
Plumbing software is a catch-all term, but for a small Australian crew it really comes down to one connected workflow you repeat every single day:
Quote on-site — measure up, price the job, and send a professional quote before you've left the driveway.
Win the job — turn that accepted quote into a scheduled job without re-typing anything.
Invoice and get paid — raise a GST-compliant tax invoice and let the customer pay by card or bank transfer.
Track the work — see what's booked, what's in progress, and what's still owed.
Anything that breaks this chain — a quoting tool that doesn't talk to your invoicing, or job management that lives separately from your accounts — means re-keying the same customer details two or three times. That's where the hours quietly disappear.
On-site quoting. Build a quote with labour and materials, apply your margin, and send it from your phone. Faster quotes win more jobs — the first plumber to respond often gets the work.
GST tax invoices. If you're registered for GST, your invoice has to meet ATO rules. A valid tax invoice for a sale over $82.50 must include the words "Tax invoice", your identity and ABN, the date, a description of what was supplied, and the GST amount (or a statement that the total includes GST). Good invoicing software for tradies builds this automatically so you never send a non-compliant invoice.
Payments. Card payments, Apple Pay and bank transfer reduce the "I'll fix you up next week" problem. Getting paid on the day beats chasing debtors a fortnight later.
Scheduling and a job board. A shared diary so you (and any apprentices or subbies) know what's on, and a job board so nothing falls through the cracks.
A customer record. A simple CRM that remembers the property, the last job, the warranty, and the photos — so when they call back about that same hot-water unit, you have the history.
BAS-ready books. Categorised income and expenses so how to lodge a BAS each quarter is a five-minute job, not a shoebox-of-receipts nightmare.
You don't need every feature on day one. You need the four-step chain above to work without friction.
Before the software talk: no app makes you compliant. Plumbing is licensed work in every Australian state and territory, and each has its own regulator — for example the Building Commission NSW, the Queensland Building and Construction Commission (QBCC), the Victorian Building Authority (VBA), and the Plumbers Licensing Board in WA. Licence classes, endorsements and compliance-certificate rules differ by jurisdiction, so always check your state regulator's requirements.
Software helps you run the business — quotes, invoices, scheduling and records — but your licence, your Certificate of Compliance, and your insurance are on you. Keep copies of your compliance certificates attached to each job record so they're easy to find if a customer or regulator ever asks.
There's no single "best" — it depends on whether you're a solo plumber, a 2–4 person crew, or a larger commercial outfit. Here's how the popular options stack up on the thing tradies ask about first: price.
Software
Best for
Pricing model
Indicative AU price
OneBookPlus
Solo & small crews wanting one all-in-one app
Flat monthly, unlimited invoices on paid plans
Free $0, then from $29/mo (GST incl.)
ServiceM8
Crews that want job-card workflow, billed by volume
Per job records created/month, unlimited users
Free up to 30 jobs, then ~$29–$349/mo (AUD, GST incl.)
Tradify
Plumbers who want simple job management
Per user, per month
~$48–$62 per user/mo (ex GST)
simPRO
Larger commercial & maintenance contractors
Custom quote + setup fee
Quote-based (enterprise)
Prices are indicative as at 2026 and change — always confirm on each provider's site. ServiceM8 and OneBookPlus quote GST-inclusive AUD; Tradify lists ex-GST per-user pricing; simPRO doesn't publish prices and charges an onboarding/setup fee.
Pricing: flat Australian pricing — a $0 free plan, then $29/month — not per user.
What it does well: quoting, GST invoicing, job tracking, payments and the books in one app, so you're not paying for a job tool plus a separate accounting subscription. Compliance certificates and staged/progress invoicing suit plumbing work, and it's mobile-first for quoting on site.
The catch: it's a newer all-in-one rather than a decades-old enterprise field platform — if you need heavy project management, weigh simPRO as well.
Best for: solo plumbers and small teams who want quote-to-paid plus accounting in one flat-priced app. See OneBookPlus for plumbers.
ServiceM8 is a well-known choice for Australian trades, built around the job card. Its standout is the pricing model: you're billed by the number of jobs you create each month, not per head, so unlimited staff can log in. There's a free tier (up to 30 jobs/month), then paid plans roughly $29, $79, $149 and $349/month. That per-job model is great if you have a big team doing a moderate number of larger jobs, but it can sting if you run high volumes of small callouts.
Tradify is a clean, trade-focused job-management tool covering quotes, jobs, timesheets and invoices. It's priced per user, per month (roughly $48–$62 ex GST in Australia in 2026, with volume discounts at higher user counts). That's simple for a one- or two-person shop, but the per-seat model means costs climb as you add apprentices, and GST sits on top of the listed figure.
simPRO sits at the enterprise end — project management, asset maintenance, inventory and multi-stage commercial workflows. It doesn't publish pricing; you book a demo and get a custom quote, and there's typically a setup fee for onboarding, training and data migration. It's powerful for large commercial and maintenance contractors, but it's usually overkill (and over-budget) for a solo plumber or a small domestic crew.
OneBookPlus is built as an all-in-one for Australian small businesses — and for plumbers that means the whole four-step chain lives in one app, with no bolt-ons:
Quote on-site. Build and send a branded quote from your phone with labour and materials, then convert an accepted quote straight into a job and an invoice — no re-typing.
GST tax invoices, done right. Invoices are GST-aware and built to meet ATO tax-invoice rules, so every invoice you send a customer is compliant.
Get paid fast. Customers pay online by card or bank transfer from the invoice, so the money lands sooner.
Bookings and a job board. Let customers request a callout through online booking, and track every job from "booked" to "paid" on a shared board.
A real CRM. Every property, contact, past job and photo in one customer record — handy when a tenant calls about the same leak six months later.
BAS-ready accounting. Income and expenses are categorised as you go, so your quarterly how to lodge a BAS is fast and your books are tidy at tax time.
The commercial pitch is straightforward. OneBookPlus has a genuinely free plan ($0/month, with 10 invoices and 5 quotes a month — enough to test it on real jobs), and paid plans start at $29/month, GST inclusive, with unlimited invoices and quotes from the entry tier. Compared with per-user Tradify or per-job ServiceM8 pricing, a flat monthly fee is predictable as you grow — and because quoting, invoicing, jobs, payments and accounting are in the one subscription, you're not stitching together (and paying for) three separate tools.
If you're already weighing up software for tradies, the honest test is to run a week of real jobs through it: quote one on-site, convert it, invoice it, take the payment, and see how many taps it took.
Solo plumber doing lots of small callouts? A flat-fee all-in-one (OneBookPlus) usually beats per-job or per-user pricing — and the free plan lets you start at $0.
Small crew (2–4) wanting a job-card workflow with unlimited logins? ServiceM8's per-job model can suit, as long as your job volume isn't huge.
One or two users who just want clean job management? Tradify is simple — just remember it's per seat plus GST.
Large commercial or maintenance contractor with inventory and projects? simPRO is built for that scale (and priced accordingly).
Whatever you choose, decide on the workflow you do twenty times a day — quoting and invoicing — not the longest feature list. The fanciest scheduling engine is worthless if it takes ten minutes to get a quote out the door.
For most Australian plumbers — sole traders and small crews — the best plumbing software is the one that closes the loop from quote on-site → GST tax invoice → payment → job tracked without making you re-enter anything. ServiceM8, Tradify and simPRO each do parts of this well at different price points and team sizes. OneBookPlus brings the whole chain into one app, with transparent pricing and a free plan so you can prove it on your own jobs before you spend a cent.
Ready to get the admin off your plate? Start your free trial of OneBookPlus — quote, invoice and get paid from one app, free to start.
This article is general information, not licensing or tax advice. Confirm current pricing on each provider's website, and check your state plumbing regulator and the ATO for your specific obligations.
