GST billing software that keeps your books in step

Invoices that satisfy Rule 46 without you checking

A GST tax invoice has to carry specific things: your GSTIN and the customer's, place of supply, HSN or SAC codes, the correct split of CGST/SGST or IGST, and a serial number that is consecutive and unique for the financial year.

SagacityBooks fills those in from your masters and checks them as you type. Invoice numbering is validated against Rule 46(b) — the series has to be unique, in date order and free of gaps, so a back-dated invoice that would break the sequence is refused rather than quietly accepted.

• Intra-state and inter-state tax worked out from place of supply
• HSN/SAC held on the item, so it is never left blank
• Reverse charge, exports, SEZ and composition handled as their own cases
• Five invoice themes and six accent colours, set once per business

Bill from wherever the sale happens

Most billing software assumes a desk. A shop bills at a counter, a distributor bills from a van, and a consultant bills from a phone between meetings.

• Quick Bill — a one-screen billing form for a phone, which opens automatically instead of the full grid on a narrow screen
• Counter till — scan with a USB scanner or the phone camera, take payment, print a 58 mm thermal receipt
• Offline — invoice numbers are reserved in advance, so billing carries on through a dead connection and the series still has no gaps
• Price lists — retail, wholesale and distributor rates that apply themselves to the right customer

Getting paid, not just billing

Every invoice can be shared as a private link the customer opens without an account — the bill, a UPI QR code, and a PDF to keep. The QR encodes the amount still outstanding rather than the face value, so re-sending a part-paid invoice asks for the right number.

Ageing shows who owes what and for how long, with the date each customer was last chased, and reminders can go out in bulk.

Common questions

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