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Side Hustles for Office Workers in Australia: What Actually Fits Around a 9-to-5

If you work office hours, the side hustles that tend to work best are the ones you control the schedule for: freelancing your professional skills, tutoring, bookkeeping, virtual assistance, and flexible platform work on evenings and weekends. Before you start, there are two things worth sorting out — what your employment contract says about outside work, and how the extra income will be taxed.

Check your employment contract first

There’s no general law in Australia stopping you from earning money outside your job. What can trip you up is your own employment contract. The Fair Work Ombudsman explains that employment contracts set out extra conditions beyond the legal minimums, and many professional contracts include clauses covering:

• Secondary employment — some contracts require you to disclose outside work or get written approval first.
• Conflict of interest — working for a competitor, or moonlighting in the same field you’re employed in, is where most real disputes arise.
• Intellectual property — work created using your employer’s time, equipment or confidential information may belong to them. Keep your side hustle on your own devices, on your own time.

A side hustle in an unrelated field — an accountant walking dogs, a project manager selling prints at a market — rarely causes a problem. If your hustle is close to your day job, read the contract carefully and consider getting approval in writing.

Side hustles that fit around office hours

These are the options office workers most commonly take up, with typical advertised rates in Australia. Treat the figures as a guide — actual earnings depend on your skills, niche and how consistently you can get clients.

A few notes on the table. Freelance platforms like Upwork and Fiverr connect you with global clients, but local work via word of mouth, Seek or LinkedIn usually pays better. Tutoring rates at the top of the range are typically for VCE/HSC specialist subjects and university-level maths and sciences. If you’re considering task platforms, our Airtasker safety guide covers how to protect yourself. And if you’re thinking about food delivery or rideshare on weekends, note that new minimum standards for gig work are rolling out — see our FWC gig pay explainer.

Surveys of Australian side hustlers consistently find modest, part-time income is the norm — commonly in the range of a few hundred to around $1,500 per month for 10–20 hours a week. Anyone promising more than that from day one is selling something.

How the tax works

How your side hustle is taxed depends on whether it’s a second job or your own enterprise.

If it’s a second job (you’re an employee): your new employer withholds tax like any other. The important step is the tax file number declaration — the ATO’s guidance on multiple jobs is to claim the tax-free threshold from one payer only, usually the one that pays you the most. Claim it from both and too little tax is withheld, which surfaces as a bill at tax time.

If it’s freelance or platform income (you’re running an enterprise): no one withholds tax for you. The income goes in your tax return and is taxed at your marginal rate on top of your salary. Whether you need an ABN depends on whether you’re carrying on a business — our guide on whether you need an ABN for a side hustle walks through it, and the second job vs ABN calculator shows the difference in take-home terms.

Two other things to keep on your radar. GST registration is only required once your business turnover reaches $75,000 a year — most office-worker side hustles are nowhere near it, but rideshare driving requires GST registration from the first dollar (ATO: registering for GST). And a rough rule of thumb many sole traders use is to set aside about a third of side hustle income for tax — more if your salary already puts you in a higher bracket. Our side hustle tax time guide covers deductions and record keeping in detail.

Being realistic about time and energy

The quiet failure mode for office workers isn’t tax or contracts — it’s burnout. A side hustle stacked on top of full-time work costs you evenings, weekends or both, and most people underestimate how much energy their day job already takes.

The hustles that survive contact with a full-time job share a few traits: they’re asynchronous (clients don’t need you at 2pm on a Tuesday), they have a short commute or none, and they either pay well per hour or build something that compounds — a client base, a product, an audience. Trading every Saturday for low, flat hourly pay rarely lasts beyond a few months.

A sensible way to start: pick one hustle, cap it at 5–10 hours a week for the first couple of months, and track what you actually earn per hour after costs. If the number is poor, change the hustle — not the number of hours.

This article is general information only, not tax, legal or financial advice. It doesn't consider your personal circumstances. For advice on your situation, speak to a registered tax agent or licensed adviser, and always check current requirements with the official source linked above.