Free Invoicing & Accounting Software for India

BusinessOS is free billing software India freelancers, MSMEs, and small businesses use every day. Full GST invoice software with configurable GST rates (5%, 12%, 18%, 28%), CGST/SGST/IGST split, GSTIN fields, HSN and SAC codes, and INR currency. Encrypted on-device storage. Free during limited early access with no card required.

Whether you need a free GST invoice generator, billing software for freelancers, or accounting software for an Indian MSME, BusinessOS gives you a complete tool without a monthly fee.

Indian tax compliance features

• Configurable GST rates (5%, 12%, 18%, 28%)
• CGST, SGST, and IGST split support
• GSTIN field for buyer and seller
• HSN/SAC code fields on line items
• INR (₹) currency formatting
• Tax invoice format meeting Indian requirements
• CSV export for accountants using Tally, Zoho Books, or Vyapar

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:

• Mumbai, MH
• Delhi (NCR)
• Bangalore, KA
• Hyderabad, TS
• Chennai, TN
• Kolkata, WB
• Pune, MH
• Ahmedabad, GJ
• Jaipur, RJ
• Surat, GJ
• Lucknow, UP
• Kochi, KL
• Chandigarh, PB
• Indore, MP
• Nagpur, MH
• Bhopal, MP

Built for these businesses

• IT freelancers and software consultants
• Digital marketing and design agencies
• MSME manufacturers and traders
• E-commerce sellers (Amazon India, Flipkart, Meesho)
• Retail shops and kirana stores
• Restaurants and food businesses
• Coaching centers and educators
• Coaches, consultants, and therapists
• Real estate agents
• Solo CA, legal, and medical practices

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.