GST Invoice App for iPhone: An Australian Checklist

Quick answer: An Australian GST invoice created on iPhone needs the same details as one created on desktop: supplier identity and ABN, date, description, total, GST treatment and any buyer details required for the sale value. Only call it a tax invoice when the supplier is registered for GST.

Use the Australian invoice app, download InvoiceSonic from the App Store, or create the document in the Australian browser generator.

An Australian GST invoice app should do more than add 10% to a total. It should help you produce the correct document type, show your ABN, identify GST clearly and give the client enough information to process the invoice.

This checklist is for sole traders and small businesses creating invoices on an iPhone. It is general information, not tax advice; confirm unusual transactions with your registered tax adviser and the latest ATO guidance.

First question: are you registered for GST?

If you are registered for GST and the sale is taxable, you generally issue a tax invoice and account for GST. If you are not registered, do not charge GST and do not label the document “Tax Invoice”. Issue a standard invoice instead.

GST registration is generally required when GST turnover reaches A$75,000 for a business or A$150,000 for a non-profit, with special rules for some activities. Check the ATO’s current GST registration guidance rather than relying on an app to decide your status.

Australian tax invoice checklist

For taxable sales, the invoice should make the following clear:

That the document is intended to be a tax invoice
The seller’s identity and ABN
The invoice date
A brief description of each item, including quantity where relevant
The GST payable, or that the total includes GST
The extent to which each sale is taxable
The buyer’s identity or ABN when required for higher-value invoices

The ATO’s tax invoice requirements are the authoritative reference. Our plain-English guide to GST and ABN on invoices explains how the fields fit together.

How to create the GST invoice on an iPhone

Set your business country to Australia. This should expose Australian tax and bank fields.
Add your business name and ABN. Check all 11 digits rather than relying on memory.
Select “Tax Invoice” only when appropriate. Non-GST-registered businesses should use “Invoice”.
Add the buyer details. Use the legal billing entity and include the buyer information required for the value of the sale.
Describe each sale. Use enough detail for the buyer to identify the goods or services.
Apply GST to the correct items. Not every Australian sale has the same GST treatment.
Review subtotal, GST and total. Automatic calculation reduces arithmetic mistakes, but you still need to confirm the tax setting.
Add BSB and account details. Include the reference you want the client to use.
Preview the PDF. Check the “Tax Invoice” label, ABN, GST and total before sending.
Keep the final record. Store the PDF you sent and update the status when payment arrives.

A common GST display example

For a fully taxable service priced at A$1,100 including GST, the invoice can show a subtotal of A$1,000, GST of A$100 and total of A$1,100. Alternatively, the total may be shown with a clear statement of the GST included, provided the document meets the applicable ATO requirements.

Mixed, GST-free, input-taxed and cross-border sales need more care. The app can calculate what you select; it cannot determine the tax law for an unusual transaction.

Payment details Australian clients expect

Bank transfer remains common for Australian small-business invoices. Include:

Account name
BSB
Account number
The invoice number as the requested payment reference
PayID only if you actively accept it and the identifier is correct

See PayID, BPAY or bank transfer on Australian invoices for layout examples and security tips.

A localised iPhone option

Invoice Generator by Sonic on the App Store supports Australian ABN, GST, AUD, date formats and BSB/account fields. It calculates totals, shows a live preview, creates PDF invoices and tracks drafts, outstanding, overdue and paid invoices. The first invoices are free, with current Pro trial and subscription terms shown in the app.

If you only need one document and do not want to install an app, use the Australian invoice generator in your iPhone browser.

Final pre-send check

Correct document label
Correct seller name and ABN
Correct buyer details
Unique invoice number and date
Clear line items
Correct GST treatment and total
Explicit due date
Complete payment details
Readable PDF preview

Frequently asked questions

Can a sole trader create a tax invoice on an iPhone?

Yes. The device does not affect validity. The document must contain the required information and use the correct GST treatment.

Can I call it a tax invoice if I am not registered for GST?

No. A business that is not registered for GST should not charge GST or issue a document labelled “Tax Invoice”. Use a standard invoice.

Does an invoice app guarantee ATO compliance?

No. A good app supplies the correct fields and calculations, but the business remains responsible for its registration status, tax treatment and the accuracy of the information entered.