ATO Framework for Self-Employed Australians
ABN, TFN, GST registration, employee-vs-contractor classification, and the core registrations every Australian sole trader and self-employed person needs to understand before trading.
Every self-employed Australian needs an ABN and a TFN before issuing invoices, must register for GST once turnover hits $75,000, and faces 47% no-ABN withholding from payers if they fail to quote an ABN. Sole traders report business income through the individual tax return using a business schedule, with the standard lodgement deadline of 31 October for self-lodgers and staggered dates to March or May for tax agent clients. Misclassifying an employee as a contractor can trigger superannuation guarantee, PAYG withholding penalties, and Fair Work sham-contracting sanctions.
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Guidance, not advice. We explain the rules, we don't assess your situation. Always seek financial or tax advice from your accountant, or contact ATO. Read our editorial scope →
Core registrations: ABN, TFN, GST, and business name
Self-employed Australians need to assemble a set of ATO and government registrations before they can trade compliantly. The ABN is the starting point, required for issuing valid tax invoices, registering for GST or PAYG withholding, and avoiding the 47% no-ABN withholding trap. You apply online through the Australian Business Register. The TFN is the ATO's core income-tax identifier: sole traders use their individual TFN for both personal and business returns.
GST registration
Mandatory once your GST turnover reaches $75,000 in any rolling 12-month period ($150,000 for non-profits). Taxi, limousine, and ride-sourcing operators must register from the first dollar earned regardless of turnover. Voluntary registration below the threshold is permitted and gives access to input tax credits, but commits you to regular BAS lodgement. You must register within 21 days of reaching the threshold, and you need an ABN first.
ASIC business name registration
If you trade solely under your personal legal name, no separate business name is required. If you trade under any other name, you must register it with ASIC and link it to your ABN. This is separate from tax registration and has its own renewal obligations. State and territory licences (building, electrical, food, health, transport) are additional requirements that sit outside the ATO framework.
Tax year, returns, and lodgement deadlines
The Australian income year runs 1 July to 30 June. For 2025-26, that covers 1 July 2025 to 30 June 2026. Sole traders do not lodge a separate company return. Instead, they lodge an individual tax return and complete a business and professional items schedule for each sole-trader business. The schedule captures business income, cost of goods sold, expenses, private-use adjustments, and net profit or loss that flows into the main return.
Self-lodgement vs tax agent
Self-lodgers using the ATO's free myTax system (accessed via myGov) face a standard due date of 31 October following year-end. Tax agent clients on the ATO lodgement program get staggered deadlines, typically 31 March or 15 May, sometimes extending to 5 June with 'pay on lodgement' concessions. The extended deadlines depend on risk profile and prior-year lodgement history.
PAYG instalments entry
If your latest lodged return shows business or investment income above the entry threshold (instalment income at least $4,000, tax payable at least $1,000, and notional tax at least $500), the ATO will bring you into the PAYG instalment system. Quarterly instalment notices are usually aligned with BAS. You can also request voluntary entry via myGov, which is often a smart move for first-year sole traders wanting to smooth cash flow.
Individual income tax rates 2025-26
Sole trader profit is taxed at your personal marginal rates under the Stage 3 scale, which took effect 1 July 2024 and continues unchanged for 2025-26. The tax-free threshold is $18,200. Above that, rates step through 16%, 30%, 37%, and 45% across progressively wider brackets. Medicare levy of 2% applies on top. The Low Income Tax Offset (LITO) provides up to $700 for taxable incomes below $66,667, phasing out in two stages.
Employee vs contractor classification
Misclassification is one of the highest-penalty areas in Australian tax. Recent High Court decisions and updated ATO guidance make the written contract the starting point, provided it reflects the genuine substance of the relationship. The central question is whether the worker operates within the engager's business (employee) or provides services from their own independent enterprise (contractor).
Key classification indicators
Control: who decides how, when, and where the work is done. Delegation: can the worker subcontract and pay others directly. Results: is the engagement for a specific deliverable at a fixed price, or time-based labour. Tools: who provides and maintains significant equipment. Risk: who bears financial exposure for defects and holds their own public liability or professional indemnity cover. Goodwill: is the worker building their own brand and client base, or only the engager's.
Consequences of getting it wrong
Misclassifying an employee as a contractor can trigger superannuation guarantee obligations on ordinary time earnings (plus the Super Guarantee Charge for late or missing contributions), PAYG withholding failures with penalties and interest, workers' compensation and state payroll tax exposure, and fringe benefits tax where non-cash benefits are provided on an employee-like basis. The ATO's online Employee/Contractor decision tool generates a record you should keep as part of your documentation when classification is uncertain.
Personal Services Income (PSI) rules
PSI rules target income that is mainly a reward for your personal effort or skills rather than generated by a business structure or assets. If your income is classified as PSI and you do not satisfy at least one of four statutory tests, the income is attributed directly to you as an individual, limiting deductions and preventing income splitting.
The four gateway tests
Results test: you are engaged to produce a specific result, you provide the tools or equipment needed, and you are liable to rectify defective work at your own cost. Unrelated clients test: you earn income from two or more unrelated clients as a direct result of advertising or making your services available to the public. Employment test: no more than 80% of your PSI comes from one client. Business premises test: you maintain and use a business premises separate from your home and the client's premises, from which you earn at least 10% of income. Passing any one test is sufficient to escape PSI attribution.
Five mistakes that cost Australian sole traders money
These are the errors the ATO sees repeatedly across self-employed returns, and each one carries direct financial consequences.
Worked example: first-year sole trader, $45,000 taxable income
Ananya starts a freelance web design business in Sydney on 1 July 2025. She has no other income and no PAYG instalments in her first year. Her net business income for 2025-26 is $45,000.
Statute references
- Income Tax Assessment Act 1997 (individual tax rates, offsets, LITO)
- Taxation Administration Act 1953, Schedule 1 s 12-190 (no-ABN withholding at 47%)
- A New Tax System (Goods and Services Tax) Act 1999 s 23-15 (GST turnover threshold)
- Superannuation Guarantee (Administration) Act 1992 s 12(3) (contractor SG obligations)
- Fair Work Act 2009 (sham contracting provisions)
- TAA Sch 1 Part 2-5 (PAYG withholding) and Part 2-10 (PAYG instalments)
- TAA Sch 1 s 284-75 (statement penalties) and s 8AAD (GIC)
- TAA Sch 1 Part IVC (objection and review rights — 60 days from notice)
Frequently asked questions
Do I need an ABN and a TFN, or just one of them?+
What happens if I trade under a name other than my own?+
How does the ATO determine whether a worker is an employee or a contractor?+
What are the Personal Services Income (PSI) rules and when do they apply?+
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