Got a side hustle? Don’t forget your tax

Kelii Leahy • March 4, 2026

With the ongoing cost-of-living squeeze, record numbers of Aussies are supplementing their income with side hustles.

But before you dive into a new gig, it’s important to understand some of the tax essentials that come with running a small business.


Whether you’re monetising online content creations, running bootcamp sessions alongside your 9-to-5 job or regularly selling handmade goods at markets, the ATO may consider that you’re running a business and expect you meet your tax obligations.


Are you running a business?


Under the current tax rules, if you earn money through continuous and repeated activities to make a profit, it’s likely you are considered to be carrying on a business.i

Income from genuine hobbies is non-assessable, but income from a business must be declared in your tax return.ii


Business operators face a range of obligations including applying for an Australian Business Number (ABN) and registering for pay as you go (PAYG) withholding if you hire any employees.iii


There is no legislative definition of "carrying on a business” but the ATO provides information and questions to help you decide:


Step 1: Identify relevant, related activities, including:


  • keeping records
  • obtaining and maintaining licences and permits
  • renting out premises or goods
  • providing goods or services.


Step 2: Are the activities a business?


The more “yes” answers, the more likely your activities in business:


  • Do you intend to be in business?
  • Do you intend to make a profit and is there a realistic chance of doing so?
  • Is the size or scale of your activity enough to make a profit?
  • Are the activities repeated and continuous?
  • Are your activities planned, organised and carried out in a business-like manner? For example, do you:
  • keep business records and use a separate business bank account?
  • advertise and sell your goods and services to the public?
  • operate from business premises?
  • maintain required licences or qualifications?
  • have a formal business plan or budget?
  • have a business name or an ABN?


Accurate recordkeeping from the start


It’s important to set up a recordkeeping system from day one to track your income and expenses accurately.


You’re legally required to keep records of all transactions relating to your tax, superannuation and registration obligations when you start, run, sell, change or close a business.iv


In most cases, these records need to be kept for five years, and you must be able to show the ATO your records if required.


Claiming genuine business-related expenses


If your side hustle is a business, all income must be declared, regardless of the amount.


The good news is you can claim tax deductions for business expenses, provided you keep receipts and the expenses directly relate to earning side hustle income (including the cost of managing your tax affairs).


If your annual turnover exceeds $75,000, you must register for Goods and Services Tax (GST) and pay all the GST collected on your taxable sales to the ATO every quarter.v


Managing cashflow


Good recordkeeping also helps you monitor the financial health of your business and know whether your business is running at a profit or loss.


It’s crucial for managing cashflow. One of the most common reasons small businesses fail, is losing control of their cash position and unable to pay their bills on time.


ATO data matching


If you are only earning small amounts, it might be tempting to assume the ATO won’t notice if you don’t report your side hustle income. But side hustles are now an important ATO surveillance target.vi


More than 600 million transactions are reported to the tax office each year. The ATO receives and matches data from banks, payment systems, government agencies, share registries, cryptocurrency service providers and building and construction payments. It can also gather industry-specific data under its “special purpose acquisition data programs”.


Impact on government benefits


Extra income from your side hustle can also affect your eligibility for government benefits. It may reduce or even eliminate payments such as the Family Tax Benefit or Child Care Subsidy. It may also affect how much Medicare Levy surcharge you pay and when you are required to start repaying a HECS/HELP debt.


Are you in business?


If you need help getting your side hustle onto a solid business footing, contact our office today. 


Case study: Hayley’s four-wheel business


Hayley works in hospitality at night and spends most days fishing or four-wheel driving. She begins creating ‘how-to’ YouTube videos during her outings.


As her online following grows, she starts earning money from her content and cuts back on her hospitality work.


Hayley sets up a schedule outlining the type of content she will produce on a weekly basis, buys equipment to improve her production quality, completes an online video editing course and records all the expenses from her content creation activity.


In deciding whether her side hustle is a business, she looks at all her activities together. Hayley determines she is running a business because she:

  • intends to make a profit to supplement her salary and wage income
  • set up a regular schedule for these activities
  • operates in a business-like way (she has a plan and system for making a profit).


Source: ATO

Are you in business? | Australian Taxation Office

ii What to include in your business's assessable income | Australian Taxation Office

iii PAYG withholding | Australian Taxation Office

iv Overview of record-keeping rules for business | Australian Taxation Office

GST - Goods and Services Tax | Australian Taxation Office

vi Side hustles are front of mind this tax season | Australian Taxation Office

By BMO June 30, 2026
After an incredible career dedicated to supporting regional businesses, farming families and rural communities, BMO Business Centre Partner Adrian Rasmussen will officially retire from the partnership effective 30 June 2026. For many across the Western Downs and beyond, Adrian has been far more than an accountant or advisor. Over decades in business, he has built trusted relationships grounded in honesty, loyalty and a genuine understanding of regional life and the people who live it. Adrian’s connection to the country and agriculture has always been at the heart of who he is. He has worked alongside generations of farming families and business owners through seasons of growth, challenge and change, becoming a steady and respected presence for clients, colleagues and the wider community alike. Reflecting on his time at BMO, Adrian said the relationships formed throughout his career have been among the most rewarding parts of the journey. “It has been a privilege to work with so many wonderful people over the years; not only clients, but colleagues and communities who have become lifelong friends,” Adrian said. “Regional communities are built on relationships, trust and supporting one another, and I’m incredibly grateful to have been part of that throughout my career.” BMO Business Centre Managing Partners Kelvin Tyler and Michelle McVeigh said Adrian’s contribution to both the business and the region would leave a lasting legacy. “Adrian has played an incredibly important role in shaping BMO into the business it is today,” they said. “His care for clients, commitment to regional communities and calm, practical approach have earned enormous respect across our industry and the communities we serve. While we will certainly miss having him in the office, we are excited for Adrian and his family as they enter this next chapter.” While stepping away from the partnership, Adrian is looking forward to spending more time with family, on the farm and enjoying a well-earned change of pace after many years dedicated to supporting others. Everyone at BMO Business Centre extends their sincere thanks to Adrian for his years of service, friendship and leadership, and wishes Adrian and his family all the very best for the future.
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