Sole Trader Structure Explained: Definition, Tax, Pros & Cons

Around 61% of all small businesses in Australia operate as sole traders — making it by far the most common way people go out on their own. The appeal is obvious: it’s free to set up, fast to start, and simple to run.

But simple doesn’t mean risk-free. The same structure that lets you begin trading tomorrow also means there is no legal shield between you and your business. If something goes wrong, your personal assets are on the line.

Before you commit, here’s exactly what the sole trader structure means in Australia, what it costs, and when it stops being the right fit.

Sole Trader Definition: What It Actually Means

A sole trader is a business structure in which the individual and the business are the same legal entity. According to the ATO, a sole trader is “the simplest and cheapest way to run a business” — but it also means you are legally responsible for all aspects of the business, including any debts and losses.

There is no separation between your personal finances and your business finances. You own all the assets, take all the profits, and carry all the liabilities personally. To operate as a sole trader in Australia, you need an Australian Business Number (ABN). That’s the only registration requirement. No ASIC involvement, no company constitution, no shareholders or directors to appoint.

Business income is declared on your individual tax return each financial year under your own Tax File Number (TFN). If your business makes $200,000 in revenue and has $80,000 in expenses, the $120,000 net profit gets added to any other income you earn and taxed at your personal marginal rate.

The term ‘sole proprietor’ or ‘sole proprietorship’ means the same thing and is more common in the United States. In Australia, ‘sole trader’ is the correct and official term used by the ATO and ASIC.

Is a Sole Trader a Company? Clearing Up the Confusion

No — a sole trader is not a company, and this is one of the most common points of confusion for new business owners.

A company is a separate legal entity registered with ASIC. It has its own Australian Company Number (ACN), lodges its own tax return at the corporate tax rate, and can be held legally liable independently of its directors and shareholders. A sole trader has none of these features — you and your business are legally the same person.

This distinction matters enormously for tax treatment, liability exposure, and how you are perceived by banks, suppliers, and larger clients. Registering a business name (for example, trading as ‘Smith Electrical Services’ rather than your own name) does not make you a company — you remain a sole trader. The business name is just a trading name, not a separate legal entity.

For a full overview of the different company types available in Australia, see our guide on types of companies in Australia.

How to Register as a Sole Trader in Australia

Registering as a sole trader involves two steps — one mandatory, one optional depending on how you trade:

• Register for an ABN through the Australian Business Register (ABR) at abr.gov.au. This is free and typically takes 15–20 minutes online. Your ABN is what identifies your business to clients, suppliers, and the ATO for invoicing and tax purposes.
• Register a business name with ASIC if you want to trade under a name other than your own legal name. For example, if your name is James Chen and you want to trade as ‘JC Plumbing Services’, you’ll need to register that name. If you simply trade under your own full name, no business name registration is required. See our guide on business name registration in Australia for the full process and current ASIC fees.

You may also need to register for GST once your annual business turnover reaches or is expected to reach $75,000. At that point, registration becomes mandatory — not optional.

Once registered, you’ll charge 10% GST on taxable sales and claim GST credits on eligible business purchases, with your obligations reported through a Business Activity Statement (BAS) lodged monthly or quarterly.

Sole Trader Tax Obligations in Australia (2025–26)

As a sole trader, your business income is treated as your personal income. It is added to all other income you earn — wages, rental income, dividends — and taxed at your personal marginal rate. There is no separate business tax return. Everything is declared in your individual return, using the business and professional items schedule.

For the 2025–26 financial year, Australian resident tax rates are:

• $0 – $18,200: Nil (tax-free threshold)
• $18,201 – $45,000: 16%
• $45,001 – $135,000: 30%
• $135,001 – $190,000: 37%
• $190,001+: 45%

The Medicare Levy of 2% applies on top of these rates for most taxpayers. Note that these rates apply to your total taxable income — not just your business profit — which means a part-time sole trader also earning wages from employment will have that combined figure taxed accordingly.

Key tax obligations for sole traders include:

• Lodging an individual tax return by 31 October each year (or later if using a registered tax agent)
• Registering for and paying GST if turnover is $75,000 or more, and lodging BAS returns regularly
• Paying quarterly PAYG instalments if the ATO determines your tax liability warrants it — typically triggered once business or investment income reaches $4,000 or more in your last tax return
• Meeting PAYG withholding obligations if you have employees
• Keeping records for at least five years for all income, expenses, and business transactions

Sole traders can claim deductions for legitimate business expenses — vehicle use, home office costs (at 67 cents per hour using the ATO’s fixed rate method for 2025–26), equipment, professional development, accounting fees, and more. These deductions reduce the taxable profit figure and are one of the primary ways a registered tax agent adds value at tax time.

Advantages of Being a Sole Trader

The sole trader structure has real strengths, especially in the early stages of a business:

• Free to set up — an ABN costs nothing to register, and there are no ASIC fees or ongoing government registration costs
• Fast to start — you can be trading within 24–48 hours of registering your ABN
• Simple compliance — one individual tax return per year, no separate company return, no ASIC annual review obligations
• Full control — every decision is yours; no board, no co-owners, no approvals required
• Tax-free threshold access — the first $18,200 of your total income is tax-free
• Small business income tax offset — sole traders with turnover under $5 million may be eligible for an offset of up to $1,000 per year
• Easy to close — no formal deregistration process; simply cancel your ABN if you stop trading

For tradies, freelancers, consultants, and anyone testing a business idea — particularly across WA’s trade and services sector — these advantages are genuinely meaningful. The structure lets you focus on building the business rather than managing compliance.

Disadvantages of Being a Sole Trader

The simplicity comes with trade-offs that catch many business owners off guard as they grow:

• Unlimited personal liability — your home, savings, and personal assets are fully exposed to business debts, legal claims, and contract disputes
• Higher tax at scale — once net profit exceeds $45,000, you’re paying 30% on every additional dollar, climbing to 37% above $135,000 and 45% above $190,000 — compared to a company’s flat 25%
• No sick leave or annual leave — if you stop working, the income stops
• Superannuation is your responsibility — there are no employer super guarantee contributions; you must manage your own retirement savings
• Harder to raise investment — you cannot issue shares or bring in equity investors without changing the structure
• Perceived as less established — some larger corporate clients and government contracts favour dealing with a company entity
• Business ceases if you do — a sole trader structure does not have perpetual succession; if you die or are incapacitated, the business does not automatically continue

None of these are dealbreakers at the right stage. But as your revenue grows and your risk exposure increases, they become more significant — and more expensive to ignore.

When a Sole Trader Structure Stops Making Sense

The sole trader structure works well when you’re starting out, but specific signals suggest it’s time to reconsider:

• Your net profit is consistently above $80,000–$100,000 and the tax rate difference versus a company is material
• You’re taking on contracts, employees, or clients that create meaningful financial or legal risk
• You want to bring in a business partner or outside investment
• You’re building a brand or business with long-term sale or growth plans
• You want to retain profits in the business at a lower tax rate for future reinvestment

The transition from sole trader to company is straightforward with the right guidance. Our guide on sole trader vs company covers the full tax comparison, liability differences, setup costs, and how to know when incorporating makes financial sense for your situation.

Considering a Business Partner? That Changes Everything

If you’re thinking about going into business with someone else, a sole trader structure is off the table by definition — it’s a single-owner entity.

The next simplest option is a partnership, which carries its own distinct tax and liability implications. Our sole trader vs partnership guide covers the comparison in full, including the often-underestimated risk of joint and several liability that comes with a general partnership.

Practical Tips for Running a Sole Trader Business Cleanly

The most common problems we see with sole trader businesses are administrative, not structural. These habits make a meaningful difference:

• Open a dedicated business bank account from day one — mixing personal and business transactions creates significant problems at tax time and signals poor record-keeping to the ATO
• Keep receipts and records for every business expense — the ATO requires records to be kept for at least five years
• Set aside tax regularly — a common rule of thumb is 25–30% of net profit, held in a separate account, to cover income tax and GST obligations when they fall due
• Register for GST before you hit the threshold — it’s easier to manage from the start than to backdate and reconcile months of GST you should have been charging
• Engage a registered tax agent — the cost of professional tax advice is itself a tax-deductible expense, and the savings typically exceed the fee by a significant margin

Frequently Asked Questions

What is the difference between a sole trader and being self-employed?

‘Self-employed’ is a broad term describing anyone who works for themselves rather than as an employee. It is not a legal structure. A sole trader is a specific legal and tax structure in Australia. You can be self-employed as a sole trader, as a company director paying yourself a salary, or as a partner in a business partnership. In everyday use the terms are often interchangeable, but for tax and legal purposes, the structure matters.

Do sole traders pay tax in Australia?

Yes. Sole traders pay income tax on their net business profit at their personal marginal rate — the same progressive rate schedule that applies to salary and wages. For 2025–26, those rates range from 16% on income between $18,201 and $45,000, up to 45% on income above $190,000, plus the 2% Medicare Levy. Legitimate business expenses are deductible and reduce the taxable profit figure before tax is calculated.

Can a sole trader have employees in Australia?

Yes. Being a sole trader doesn’t mean working alone. You can hire staff — you’ll need to register for PAYG withholding, run payroll, meet superannuation guarantee obligations for employees (currently 11.5% of ordinary time earnings in 2024–25), and comply with Fair Work Act requirements. The distinction is that you, the owner, remain a sole trader. Your employees are a separate matter and do not change your business structure.