You’ve got the idea. You’ve probably even got your first client or sale lined up. But before any of that becomes official, one question stops almost every new business owner in their tracks: should you register as a sole trader, or set up a company?
It sounds like paperwork. It actually isn’t. This one decision shapes how much tax you pay, how protected your personal assets are, and how easily you can grow later. If you get that wrong, you could be paying more tax than you need to, or worse, putting your house on the line for a business debt.
This guide breaks down the sole trader vs company in Australia debate in simple terms, compares the numbers, and shows you exactly when it’s time to move from one structure to the other.
Sole Trader: The Simple Starting Point
A sole trader structure means you are the business. There’s no legal separation between you and your enterprise. You trade under your own Australian Business Number (ABN), report business income on your personal tax return, and keep every dollar of profit after tax.
Why most Australians start here:
- Setup takes a day, sometimes less, and costs next to nothing
- No company tax return, no separate financial statements
- You control everything, no directors, no shareholders, no board approvals
The catch: there’s no legal wall between you and your business. If the business owes money or gets sued, your personal assets, your car, your savings, even your home, aren’t automatically protected. And as your income grows, so does your personal tax rate, all the way up to 45% plus the Medicare levy for high earners, according to the Australian Taxation Office.
Banks and investors often hesitate to fund sole traders because they lack formal business records and official company status. Plus, expanding is difficult when one person must do all the work.
Company Structure: Built for Growth and Protection
A company is a separate legal entity. It can own assets, sign contracts, and be sued, all independently of you. Directors and shareholders sit behind that legal shield, which is precisely why companies are the default choice once a business starts scaling.
What makes a company attractive:
- A flat company tax rate of 25% for base rate entities (turnover under $50 million), well below the top personal rate, as confirmed by the ATO’s company tax rates page
- Limited liability, your personal assets generally stay separate from business debts
- Easier to bring in investors, partners, or sell the business down the track
The trade-off: companies come with more admin. You’ll need to lodge an annual company tax return, keep separate financial records, register with ASIC, and pay ASIC’s annual review fee. Profits you draw out as wages or dividends may also attract additional tax at your personal rate.
Business Structure Australia: A Side-by-Side Comparison
Feature | Sole Trader | Company |
Setup cost | Low (ABN registration, free) | Moderate ($500–$600+ ASIC fee) |
Tax rate | Personal marginal rates (up to 45%) | Flat 25% (base rate entity) |
Liability | Unlimited, personal assets at risk | Limited, entity is legally separate |
Admin & compliance | Minimal | Annual return, ASIC fees, formal records |
Best for | Freelancers, contractors, early-stage side hustles | Growing businesses, higher income, multiple owners |
Profit access | Immediate, all yours | Via wages or dividends |
Tax Comparison: Where the Real Difference Shows Up
Here’s the number that changes most people’s minds. Once your business profit crosses roughly $45,000–$50,000 a year, the flat 25% company tax rate starts working out cheaper than your rising personal tax bracket. Below that threshold, the tax-free threshold and lower personal rates usually make staying a sole trader more efficient.
It isn’t only about the rate, though. A company lets you retain profits inside the business at 25%, instead of withdrawing everything and paying tax on it personally straight away, useful if you’re reinvesting in stock, equipment, or hiring. This is exactly where small business owners in Melbourne tend to come unstuck without guidance, something our team at Smart Digits helps map out before, not after, tax time.
Trust vs Company: Where Does a Trust Fit In?
You’ll often hear “trust vs company” mentioned in the same breath as sole trader vs company, and for good reason. A discretionary trust is another common Australian structure, particularly for family businesses and asset protection.
- Trusts let you distribute income to beneficiaries (like family members) in lower tax brackets, which can reduce overall tax paid, but they don’t have their own flat tax rate and involve more complex compliance, including trust deeds and annual distribution resolutions.
- Companies offer a flat rate and stronger structure for retaining profits or bringing in investors, but income can’t be distributed as flexibly as with a trust.
Many growing businesses actually use a combination, a company acting as trustee for a trust, to capture benefits from both. This is where professional advice genuinely pays for itself, since the right setup depends on your income, family situation, and long-term goals. Bentleys’ guide to choosing a business structure and Webb Financial’s structure comparison are solid starting points, though nothing beats an accountant who actually knows your numbers.
When Should You Switch from Sole Trader to Company?
There’s no single rulebook, but these are the signals accountants watch for:
- Your profit is consistently above $50,000 and personal tax is eating into your margins
- You’re taking on risk, signing bigger contracts, hiring staff, or holding stock
- You want to bring in a business partner or investor
- You’re planning to sell the business eventually, buyers prefer clean company structures
- You want to separate personal and business finances for good, not just for tax, but for peace of mind
If two or more of these sound familiar, it’s worth getting your numbers reviewed properly rather than guessing.
Getting the Structure Right the First Time
There’s no universally “best” structure, only the one that fits your income, risk, and goals right now, and can grow with you. What works for a freelance graphic designer rarely works for a business hiring five staff and holding inventory.
This is where a proper conversation with an accountant, not a generic online calculator, makes the difference. At Smart Digits, we help Melbourne business owners choose, set up, and restructure between sole trader, company, and trust arrangements, so the paperwork works for your growth instead of against it. If cash flow planning is also on your mind as you scale, our piece on bookkeeping for better cash flow is a useful next read.
Frequently Asked Questions (FAQs):
Is it cheaper to be a sole trader or a company in Australia?
It depends on profit level. Below roughly $45,000–$50,000 profit, sole trader is usually cheaper due to the tax-free threshold. Above that, a company’s flat 25% rate often works out better.
Can I change from a sole trader to a company later?
Yes, and many businesses do exactly this. You’ll need a new ABN and ACN for the company, and your accountant can help transfer contracts, assets, and clients smoothly.
Do I need a company to protect my personal assets?
A company or trust structure generally offers stronger asset protection than operating as a sole trader, since the entity is legally separate from you.
Is a trust better than a company for tax purposes?
Not necessarily better, just different. Trusts offer flexible income distribution to beneficiaries, while companies offer a flat, predictable tax rate. The right choice depends on your family and business situation.
How much does it cost to set up a company in Australia?
Company registration through ASIC currently costs a few hundred dollars, plus ongoing annual review fees, compared to the near-zero cost of registering as a sole trader.
Choosing between sole trader, company, or trust isn’t a decision to make alone with a Google search. Talk to the team at Smart Digits for advice tailored to your business, your income, and where you want to be in five years.
