Note: This article provides general information only. It is not tax advice. Australian tax obligations depend on individual circumstances. Consult a registered tax agent or the ATO directly for advice specific to your situation.

The ABN question is one Australian self-published authors encounter quickly once royalties start arriving. The answer is not a simple yes or no. It depends on your intentions, your income level and how the ATO classifies your publishing activity.

ABN: What It Is and When You Need One

An Australian Business Number is an 11-digit identifier for businesses operating in Australia. It is issued by the Australian Business Register and is free to apply for. Having an ABN identifies you as conducting a business enterprise and is required for several activities: invoicing other businesses without having tax withheld at the top marginal rate, registering for GST and claiming business-related tax deductions.

Do self-published authors need an ABN?

If you are publishing with a genuine intention to make a profit and are conducting the activity in a business-like manner (keeping records, tracking expenses, treating it as income-generating work rather than a hobby), then the ATO considers this a business activity. An ABN is appropriate and advisable. If you are publishing as a one-off personal project with no expectation of ongoing income, the ATO may classify it as a hobby rather than a business — in which case an ABN is not required but royalties are still assessable income.

What happens if you don't have an ABN?

If an Australian business pays you without you providing an ABN, they are required under withholding rules to withhold 47% of the payment and remit it to the ATO. This does not apply to royalties paid by overseas platforms (KDP, IngramSpark) but can apply to payments from Australian publishers, distributors or event organisers. Having an ABN avoids this.

GST: When It Applies to Authors

GST registration is mandatory when your business income exceeds AUD $75,000 per year. Below this threshold, registration is voluntary. Most debut self-published authors do not reach this threshold from book royalties alone, but it is worth understanding what GST applies to and what it does not.

Print books and GST

Printed books are GST-free supplies under Australian tax law. This means you do not charge GST on the sale price of a print book, and you cannot claim a GST credit on the GST-free component of your sales. However, the services you purchase to produce the book (editing, design, printing) may include GST if the supplier is Australian GST-registered. If you are GST-registered, you can claim these input tax credits.

Ebooks and GST

Ebooks are classified as digital products and are subject to GST. When you sell an ebook to an Australian customer, GST applies at 10%. Platforms like Amazon handle GST collection and remittance for Australian sales on their behalf. As an author receiving royalties, you are generally not collecting GST directly from customers; the platform handles this. However, if you sell ebooks directly through your own website to Australian customers and your turnover exceeds $75,000, you must register for GST and remit it.

Royalties and Income Tax

Royalties from self-publishing platforms are assessable income in Australia regardless of where the platform is based. KDP royalties paid to Australian authors (in AUD) and IngramSpark royalties (paid in USD via Payoneer) both need to be declared in your Australian tax return.

US withholding tax and the W-8BEN form

IngramSpark, KDP and most US-based royalty payers are required to withhold US tax from payments to non-US persons unless the recipient claims treaty benefits. Australia has a tax treaty with the United States. Under this treaty, the withholding rate on royalties for Australian residents is 5%, compared to the default 30% rate that applies if no form is submitted.

To claim the reduced 5% withholding rate, you must complete IRS Form W-8BEN within your account settings on each platform (KDP, IngramSpark and others that pay royalties). If you have not done this, you may be having 30% withheld from your US royalty payments. The form can be submitted retrospectively for future payments but you cannot generally reclaim excess tax already withheld without filing a US tax return.

Declaring foreign royalties

Foreign royalties must be converted to AUD at the exchange rate applicable at the time of payment and declared as income in your Australian tax return. The ATO publishes average monthly exchange rates that can be used for this purpose. IngramSpark pays in USD; you declare the AUD equivalent.

Deductible Expenses for Self-Published Authors

If your publishing activity is classified as a business (not a hobby), expenses incurred in earning that income are generally deductible. Deductible expenses for self-published authors typically include editing costs, cover design, formatting software, ISBN fees, author website costs, platform subscription fees, proof copy printing costs, postage for copies sent for review and a portion of home office expenses if you work from home.

Hobby vs. business distinction: The ATO applies a multi-factor test. Factors that support a business classification include: publishing with the intent to make a profit, maintaining records, having an established system for marketing and distribution and treating the activity as ongoing work. A single self-published book with minimal marketing effort is more likely to be classified as a hobby activity. This distinction affects whether you can offset publishing losses against other income.

Practical Steps

Apply for an ABN through the Australian Business Register (business.gov.au) if you intend to publish as a business activity. It is free and takes approximately 10 minutes online.
Complete IRS Form W-8BEN on each US platform (KDP and IngramSpark) to claim the 5% treaty withholding rate rather than 30%.
Keep records of all income and expenses from publishing activity in a simple spreadsheet or accounting tool.
Declare all royalty income (domestic and foreign) in your Australian tax return.
Consult a registered tax agent if your publishing income is growing or if you are unsure about the business vs. hobby classification.

Before you worry about tax, make sure the manuscript is ready to publish.

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Do Australian Self-Published Authors Need an ABN? Tax, GST and Royalties Explained