Over 95% of Indian small businesses use WhatsApp for customer communication. Sending invoices via WhatsApp is fast, familiar, and legally valid — as long as the invoice itself meets GST requirements.
Is a WhatsApp Invoice Legally Valid?
Yes. Under GST law, an electronic invoice shared via WhatsApp (as a PDF or image) is fully valid, provided it contains all mandatory fields. The GST Act does not mandate physical paper invoices — electronic invoices are explicitly recognised. Note: if your annual turnover exceeds ₹5 crore, you are additionally required to generate an IRN (Invoice Reference Number) from the IRP portal before sharing the invoice.
WhatsApp Business vs Regular WhatsApp
WhatsApp Business offers catalog features, quick replies, and a professional business profile — making it the better choice for invoicing. It's free and available on Android and iOS. Set up your business name, GST number in the description, and business hours.
How to Send a GST Invoice via WhatsApp with Credwik
- Create invoice in Credwik (takes under 30 seconds)
- Tap "Share" → "WhatsApp"
- Customer is auto-selected if their number is saved
- Invoice sends as a formatted PDF
- Customer gets a payment link directly in the message
Best Practices
- Always send as PDF, not a photo (clearer and more professional)
- Include your UPI ID or payment QR in the invoice
- Set up WhatsApp Business quick replies for "payment received", "invoice pending"
- Keep a WhatsApp group or broadcast list for monthly statements to regular customers