Before You Incorporate That Side Hustle, Read the Fine Print on the Fees

There is a piece of advice that circulates through Australian small business circles with the certainty of folklore: the moment your side hustle earns its first serious dollar, you should register a Pty Ltd. It sounds prudent. It sounds professional. And in a meaningful number of cases, it is precisely the wrong move.

The problem is not that companies are bad. The problem is that incorporation carries fixed, unavoidable costs that do not care whether your business had a good year or a quiet one. For a side hustle turning over $15,000, those costs can quietly consume a fifth of revenue. For a business turning over $150,000, the same costs barely register. The break-even point between those two figures is where the real decision lives — and almost nobody calculates it before clicking 'register' on the ASIC website.

The Honest Arithmetic of a Pty Ltd

Start with what incorporation actually costs, not what the registration fee costs. Yes, the ASIC application fee is a known quantity, but it is the smallest line on the ledger. From there, the recurring obligations begin.

• Annual ASIC review fee. Every registered company pays this, every year, without exception. It is a fixed toll on the road, collected whether the company traded or sat dormant.
• Accounting and tax preparation. A company return is materially more complex than a sole trader return. Registered tax agents charge accordingly, and the gap between the two is typically several hundred dollars a year at the low end.
• Administrative overhead. A company needs a registered office, a record-keeping regime, director consent records, and a solvency resolution each year. None of this is onerous for an established business; all of it is friction for a hobby that got ambitious.
• Professional advice at the margins. Dividends, director's salary structures, franking credits — once you operate through a company, you have entered a system where getting it wrong has consequences.

Against this, place the benefits: a flat 25% corporate tax rate, which is attractive only if your profits exceed what you would personally pay in marginal tax; and limited liability, which protects personal assets only if you have not personally guaranteed everything, as most small operators do with suppliers, landlords and lenders.

Where the Break-Even Sits

Run a realistic scenario. A sole trader earning $30,000 in profit on top of a full-time salary pays marginal tax on that income — but at modest side-income levels, the difference between that and the 25% company rate is often a few thousand dollars. Layer on $1,500 to $2,500 in annual company administration and accounting costs, and the tax benefit is frequently erased entirely.

Now run the same scenario at $120,000 in profit. The gap between a 37% marginal rate and the 25% corporate rate widens considerably, and suddenly the fixed costs of incorporation are a rounding error against the deferral benefit. Somewhere between those two figures — usually in the $60,000 to $80,000 range of annual profit, depending on your other income — the maths tips decisively toward incorporating.

Liability considerations can justify incorporating earlier, but only where there is genuine, uninsurable risk: physical products, professional advice, contracting to large entities. A person selling candle-making kits online does not carry that risk profile, whatever a well-meaning forum suggests.

The Point at Which the Structure Should Change

None of this argues against the Pty Ltd. It argues for sequencing. Start as a sole trader, where the compliance burden is close to nil and the tax return is a single schedule. Keep clean records. Watch two numbers: annual profit and the emergence of real liability exposure. When either crosses your threshold, convert — and do it deliberately, with an accountant, rather than reactively after a scare.

A company is a tool for a business that has grown into one, not a costume for a business that hopes to. The founders who benefit most from incorporation are the ones who waited until the numbers demanded it — and who spent the intervening years with one less set of deadlines, one less fee, and one less reason to dread the annual review letter.

The side hustle does not need a company. It needs revenue. Incorporate when the revenue earns it.