How to Send a GST Invoice From Your Phone

Invoice Biz: Expense Tracker is a free iPhone and Android app that lets you send fully compliant GST invoices directly from your phone — with automatic tax calculations, your GST registration number printed on every invoice, and a professional PDF generated in seconds. It also tracks your expenses and connects invoicing to Profit & Loss reports, all at no cost.

If your business is registered for GST — whether you're in India, Australia, Canada, or New Zealand — every invoice you send needs to meet specific requirements. The GST amount must be clearly itemized, your registration number must appear on the invoice, and the format needs to be professional enough to hold up for your customer's tax records.

Most small business owners either struggle with this in a spreadsheet or pay for software that does far more than they need. Here's a simpler way to do it directly from your phone.

What Does a GST-Compliant Invoice Need to Include?

While GST rules vary slightly by country, a compliant invoice typically requires:

• Your business name and GST registration number
• Customer's name and address
• Invoice number and date
• Clear description of goods or services
• Amount before GST, GST amount, and total amount payable
• Payment terms

Getting all of this right manually in a Word template is time-consuming and error-prone. A dedicated invoice app handles it automatically.

How Does Invoice Biz Handle GST Invoicing?

Invoice Biz is a free iPhone and Android app that lets you create fully GST-compliant invoices in seconds — with all required fields, automatic tax calculations, and professional PDF output ready to share instantly.

Step 1 — Set up your tax rate
In the app settings, enter your GST rate (10% for Australia, 18% for India standard rate, 5% for Canada, or whichever rate applies to your business). The app applies this automatically to every invoice going forward.

Step 2 — Add your GST registration number
Enter your GST/ABN/GSTIN number in your business profile. It appears automatically on every invoice you generate — no manual entry each time.

Step 3 — Create the invoice
Add your customer, line items, and any discounts. The app automatically calculates the pre-GST subtotal, the GST amount, and the total payable — all clearly itemized exactly as required for a compliant invoice.

Step 4 — Share as PDF instantly
Send the invoice as a professional PDF via email, WhatsApp, or any other channel. The format is clean, professional, and meets the documentation requirements for your customer's tax records.

Does the App Support Multiple GST Rates on a Single Invoice?

Some businesses deal with multiple GST rates across different products or services — for example in India where different goods attract different GST slabs (5%, 12%, 18%, 28%). The app supports custom tax fields per line item, so you can apply different rates within the same invoice.

How Can I Track GST Collected Across My Business?

Beyond individual invoices, Invoice Biz connects your invoicing data to your expense tracking and Profit & Loss reports. This means you can see your total GST collected across a period alongside your other financial data — useful for when it's time to file your GST return.

Which Countries With GST Does This App Support?

The app's flexible tax configuration makes it work for GST-registered businesses across India, Australia, Canada, New Zealand, Singapore, and anywhere else with a GST or similar consumption tax system. Multi-currency support means it handles cross-border invoicing natively as well.

Is Invoice Biz Free to Download?

Invoice Biz is free to download on iPhone and Android. No account creation, no sign-up required. The Pro upgrade unlocks additional features including editing past invoices, P&L reports, cloud backup, and WhatsApp payment reminders — available at $1.99/month, $9.99/year, or $15.99 lifetime.