Booking & invoicing software
Take online bookings, turn each one into a GST-compliant tax invoice in a single click, and get paid — all from one Australian app. Stop paying for a scheduler and an accounting tool that don't talk to each other.
Free plan available · No credit card · Built for Australian GST
One database, two jobs
Most businesses run a calendar tool and an accounting tool side by side, then re-type customers from one into the other. OneBookPlus keeps both on one record — so a confirmed booking already knows everything the invoice needs.
How we compare
Calendly, Acuity, and Square Appointments schedule. Xero and QuickBooks invoice. Running both means two databases, two subscriptions, and a sync problem. Here's how OneBookPlus does both in one app.
| Feature | OneBookPlus | Calendly + Xero | Acuity Scheduling | Square Appointments |
|---|---|---|---|---|
| Online booking page | Yes | Yes | Yes | Yes |
| Booking deposits & SMS reminders | Yes | Yes | Yes | Yes |
| ABN-compliant GST tax invoices | Yes | Yes | No | No |
| One-click booking → invoice | Yes | No | No | No |
| Shared customer database | Yes | No | No | No |
| No connector / Zapier needed | Yes | No | No | No |
| Australian GST & AUD built in | Yes | Yes | No | No |
| Price | From $0/mo | ~$50–90/mo | ~$20–61/mo | ~$0–50/mo |
Real-world scenario
How a single job flows through OneBookPlus from the booking page to a reconciled payment
9:14am — A new customer finds your booking page and reserves a Thursday 2pm slot. They pay a deposit through the page, and the booking lands on your calendar with their name, contact details, and the service already attached. No email tag, no double-entry.
Thursday 2pm — You do the work. From the booking, you tap "Create invoice". The customer, the service, and the price are pre-filled; 10% GST is added automatically and the document is a compliant ABN tax invoice. You adjust the line items if the job grew, then send.
Thursday 2:41pm — The invoice goes out with a Stripe payment link. The customer pays from their phone. The payment reconciles against the invoice, the contact's history updates, and the amount flows into your BAS-ready totals — all without you opening a second app or exporting a single CSV.
Who it's for
Any Australian business that books work and bills for it — these are the ones that get the most out of having both in one app.
Plumbers, electricians, and handypeople: customers book a job slot online, you complete the work, then raise the GST invoice from the booking on the spot — no quoting twice.
Clients self-book appointments with a deposit, get an SMS reminder to cut no-shows, and the sale flows straight into an invoice and the day's takings.
Take session bookings against your real availability, then invoice per session or per package — GST handled, payment link attached, follow-up automatic.
Recurring bookings for regular clients turn into recurring invoices, so the calendar and the billing never drift apart across the month.
Stop overpaying
Most small businesses stitch together 4-6 tools that don't talk to each other. Here's what that typically costs.
Built in Melbourne, AU
ATO-ready from day one
256-bit encryption
No credit card needed
Start free. Take your first booking and send your first GST invoice today — no credit card required.
For your industry: OneBookPlus for tradies · OneBookPlus for salons
Last reviewed and updated: by Bishal Shrestha
FAQ
Booking and invoicing software is one app that handles two jobs most small businesses pay for separately: taking customer bookings (an online calendar, availability rules, deposits, and reminders) and billing for the work (quotes, GST tax invoices, payment links, and reminders). Doing both in one place means a confirmed booking can become an invoice without re-typing the customer's details into a second system. OneBookPlus combines an online booking page with ABN-compliant, 10% GST invoicing under one login.
Yes. It's built in Melbourne for Australian small businesses: 10% GST is applied automatically, invoices are ABN-compliant tax invoices, payments settle in AUD via Stripe, dates and times default to Australian formats and timezones, and the copy is in Australian English. You aren't bending a US scheduling tool to fit the ATO's rules.
Yes — that's the point of having both in one app. When a booking is completed you can raise an invoice for it in one click, with the customer, service, and price already filled in. The customer record, the booking, and the invoice all reference the same contact, so nothing is copied between tools and nothing drifts out of sync.
Calendly (or Acuity / Square Appointments) handles the calendar; Xero (or QuickBooks / MYOB) handles the books — but they're separate databases. A booking made in Calendly doesn't create a customer or a draft invoice in Xero, so you either re-enter the details, export a CSV, or pay for a Zapier connector. OneBookPlus is one database: the booking, the contact, and the invoice are the same records, so the handoff is automatic and free.
No. Customers book through a public booking page in their browser and pay through a hosted Stripe payment link on the invoice. There's no app for them to download and no account for them to create. You run the business from the OneBookPlus dashboard or the iOS app.
A separate booking tool (around $15–$45/month) plus an accounting tool (Xero from ~$35/month) usually lands between $50 and $90/month before any connector to sync them. OneBookPlus includes both bookings and invoicing on the Free plan, with paid tiers from $29/month lifting volume limits. See the pricing page for the current per-tier limits.
Yes. If you only invoice, ignore the booking page — it doesn't get in the way. If you only take bookings today, the invoicing is there the day you need to bill. Because both share one customer database, switching on the second module later requires no migration.
About the author
Founder & CEO, OneBookPlus
Bishal has over a decade of experience in digital marketing, web development, and small business consulting across Australia. OneBookPlus combines online bookings and ABN-compliant GST invoicing in one Australian app — built in Melbourne so a confirmed booking can become a paid tax invoice without re-typing the customer into a second tool. This page targets the broad 'booking and invoicing software' need; the linked feature pages cover each module in depth.