Free Invoicing & Accounting Software for Australia

BusinessOS is a free invoicing and accounting platform for Australian freelancers, sole traders, and small businesses. 10% GST built in, ABN fields, AUD currency, and encrypted data storage. Free during limited early access.

Australian tax compliance features

• 10% GST rate applied automatically
• ABN (Australian Business Number) field for buyer and seller
• AUD currency and formatting
• Tax invoice format meeting ATO requirements
• Structure ready for BAS (Business Activity Statement) preparation
• Sole trader and Pty Ltd support
• CSV export for Xero, MYOB, or QuickBooks Australia

Cities and regions served

BusinessOS works everywhere with an internet connection to sign up — and fully offline after that. Currency, tax, and language settings adapt to your location. Popular cities:

• Sydney, NSW
• Melbourne, VIC
• Brisbane, QLD
• Perth, WA
• Adelaide, SA
• Gold Coast, QLD
• Newcastle, NSW
• Canberra, ACT
• Sunshine Coast, QLD
• Wollongong, NSW
• Geelong, VIC
• Hobart, TAS
• Darwin, NT
• Cairns, QLD
• Townsville, QLD

Built for these businesses

• Freelance developers, designers, and creatives
• Sole traders and Pty Ltd directors
• Marketing agencies and creative studios
• E-commerce merchants
• Cafes, restaurants, and hospitality
• Retail and boutique shops
• Tradespeople and contractors
• Real estate agents
• Coaches, consultants, and allied health
• Solo legal and medical practitioners

Complete feature set

• Unlimited invoices and quotations
• One-click quote-to-invoice conversion
• Expense tracking with receipts
• Customer CRM with pipeline and trust scoring
• Product and inventory management
• Cash flow forecasting and tax set-aside
• P&L, balance sheet, and tax reports
• Multi-currency with automatic conversion
• Voice invoicing (English + Arabic)
• One-tap WhatsApp send on every invoice
• PDF export with your branding
• Zero-knowledge encryption
• Works fully offline
• Installs as a native app on any device

Privacy first

BusinessOS stores your data with zero-knowledge encryption. Everything is encrypted on your device with AES-GCM using a key derived from your password. If our servers are ever breached, an attacker only gets encrypted noise — not your revenue figures, customer list, or bank details.