GST billing and invoices for small shops

GCO Billing lets you create GST tax invoices — or a bill of supply if you aren't GST-registered — from the vendor app or billing.gocrazyoffers.com. Add catalog products or free-text items with per-line GST, and invoice numbers run automatically by financial year. Share a PDF or a link from your own phone for free.

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Updated 17 October 2026

Key facts

What you get

Tax invoice when GST is on and your GSTIN is valid; otherwise a bill of supply.
Prices are GST-inclusive; tax is split per line automatically.
Automatic numbering like PREFIX/26-27/0001, restarting every financial year.
Works on the phone app and on the web at billing.gocrazyoffers.com.
Customers view the invoice by link; PDF download included.
Enter the customer's mobile to see their points, stamps, membership and coupons at your shop before billing.
Creating and sharing invoices from your own phone is free.

Price

Creating invoices: free
Sharing from your own phone: free

1 credit = ₹1. Full price list →

FAQ

GST billing & invoices: common questions

Can I bill without a GST number?

Yes. Without a valid GSTIN, GCO issues a bill of supply instead of a tax invoice.

Can I use it on a laptop?

Yes, at billing.gocrazyoffers.com with the same login as the vendor app.

Popular with

Shops that use it most

🛒 Kirana & supermarkets 💊 Pharmacies & medical stores 📱 Mobile & electronics stores 👗 Clothing & fashion stores

Works well with

Related features

Product catalog

List your products with photos, prices and discounts; import from Excel; customers ask in chat.

Learn more →

Reward points & cashback

Give points on every bill, let customers redeem them, and share points with partner shops.

Learn more →

Bring your customers back, again and again.

One-time ₹1,499 + GST activation with 500 free credits. No recurring charges — after that you pay a few credits only when customers use your rewards.