Plumber Software for Quoting, Jobs & GST Invoicing

Plumbing businesses in Australia have a paperwork problem that's been getting worse, not better. You're writing quotes on the back of invoices, texting photos of burst pipes to customers, and then spending your evenings trying to match Xero invoices against bank deposits. Many plumbers pay $35/month for Xero, $49/month for ServiceM8 or Fergus, and still end up with a shoebox of receipts from Reece and Tradelink that never get logged properly. The result? You don't actually know how profitable each job was until your accountant tells you three months later — if they can even untangle it.

OneBookPlus gives you one app for your entire plumbing business. Build itemised quotes on your phone with labour, materials, callout fees, and GST calculated automatically. When the customer accepts via the quote link, the job drops straight into your calendar. Complete the work, snap photos, attach compliance certificates, and convert the quote to a GST-compliant invoice with one tap — all before you leave the property. Log materials from Reece, Tradelink, or Bunnings against the job with receipt photos so you can see your true margin on every single job. No more guessing, no more double-entry, no more Saturday mornings doing data entry.

Your Daily Workflow

It's 6:45am and your phone buzzes — a burst pipe callout through your OneBookPlus booking page. You flag it as emergency, check the customer's property history (you fixed their hot water system last year), and head out. On-site, you diagnose the issue and build a quote: $480 labour including emergency rate, $95 for copper fittings and a new section of pipe, GST included. The customer accepts immediately. Pipe fixed by 8:30am. You snap a before-and-after photo, attach it to the job, and convert the quote to an invoice — sent before you're back in the van. Your week view shows a hot water install at 10am and a drainage inspection after lunch. Your apprentice has two maintenance jobs assigned. At the end of the day you check your dashboard: four jobs completed, $2,400 invoiced, materials logged with receipt photos, and service reminders queued for three customers due for annual backflow testing.

Bank Feeds & Accounting

Connect your business bank account via CDR Open Banking and OneBookPlus pulls in transactions daily. When the burst-pipe customer pays via the invoice link, the payment is automatically matched against the outstanding invoice — no manual reconciliation needed. Materials purchases from Reece and Tradelink are categorised as job expenses. Fuel, van insurance, and tool purchases are classified into the right categories by our AI engine, which learns your spending patterns over time. Come BAS time, your GST summary is already prepared: total GST collected on invoices, total GST credits on purchases, and the net amount owing. Export it in one click or share it with your accountant. The days of sorting through a glovebox full of receipts are over.

Getting Started

Sign up free — no credit card, no lock-in contract. Select “Plumber” as your business type and OneBookPlus pre-configures your account with plumbing service categories, typical job types (emergency callout, hot water install, drainage, maintenance), and invoice templates that include your plumbing licence number. Import your customer list via CSV from ServiceM8, Fergus, or a spreadsheet. Connect your bank account through the secure Open Banking flow. Most plumbers send their first quote within 20 minutes of signing up and have their bank feed running by the end of the day. Switching from ServiceM8 plus Xero typically takes a single evening — and you'll wonder why you didn't do it sooner.