TFN vs ABN: The Key Difference
A Tax File Number (TFN) is issued to individuals for personal income tax purposes. An Australian Business Number (ABN) is a 11-digit identifier for businesses and sole traders. If you’re an employee, you need only a TFN. If you’re self-employed or run a business, you typically need an ABN—though some sole traders operate under their TFN alone.
When You Need a TFN
You need a TFN if you earn salary, wages, or any personal income in Australia. It’s required before your first day of work; employers cannot pay you without one. TFN is also used for superannuation, government benefits (if eligible), bank accounts, and tax returns. All individuals—employees, contractors, and self-employed people—must have a TFN.
When You Need an ABN
You need an ABN if you operate a business, work as a sole trader, or provide services to multiple clients as a contractor. ABN registration is mandatory if your annual turnover exceeds AUD 75,000. Even if turnover is below this threshold, registering for ABN is optional but often recommended—it signals legitimacy to clients and enables GST registration, which allows input tax credits on business expenses.
ABN Registration Process
Apply for an ABN online through the Australian Business Register (ABR). The process takes 5 minutes. You’ll need your TFN, identity documents, and business details (business name, structure, address, expected turnover). ABN is issued immediately upon application. There’s no fee.
GST and ABN: Connected but Different
GST (Goods and Services Tax) is a 10% tax on supplies of goods and services. ABN registration doesn’t automatically make you GST-registered—that’s a separate step. Once you’re registered for GST, you collect 10% from clients and remit it to the ATO. GST registration is mandatory if turnover exceeds AUD 75,000 and optional below.
Tax Filing with ABN
As an ABN holder, you file a Business Activity Statement (BAS) quarterly with the ATO, reporting GST (if registered) and other activity-based taxes. Annual tax returns also apply. Sole traders file income tax returns showing business profit/loss. Sole traders don’t need a separate entity; their business income flows to their personal tax return.
FAQ
Q: Can I have both TFN and ABN? A: Yes, most self-employed people have both. TFN is personal; ABN covers business activities.
Q: Do I need an ABN if I freelance part-time? A: Not mandatory if turnover stays below AUD 75,000, but it’s recommended to show clients you’re legitimate.
Q: Can employees register for an ABN? A: Yes, if you do side business/freelance work. Your employment income uses TFN; business income uses ABN.
Q: What’s the cost of an ABN? A: Registration is free. No annual fees.
Q: Can I cancel my ABN later? A: Yes, but there are rules. Contact the ABR if you cease business.
Sources
- ATO: Tax File Numbers
- Australian Business Register: ABN Lookup
- ATO: GST Registration
- ATO: Sole Traders
This article is informational only and not financial advice.