Facebook Marketplace Tax Australia: What Sellers Need to Know for FY 2025-26

Selling on Facebook Marketplace has become increasingly popular among Australians looking to declutter their homes or start a side hustle. Whether you are selling pre-loved items, handmade crafts, or running a full-scale reselling business, understanding your tax obligations is crucial. Many sellers are surprised to learn that the Australian Taxation Office (ATO) has been increasing its scrutiny of online marketplace transactions, making it more important than ever to stay compliant.

In this comprehensive guide, we will walk you through everything you need to know about Facebook Marketplace tax in Australia for the 2025-26 financial year. From determining whether you need to declare your earnings to understanding income tax, superannuation, and GST obligations, we have got you covered with practical advice tailored for Australian sellers.

Do You Need to Pay Tax on Facebook Marketplace Sales?

The answer to this question depends on the nature of your selling activity. Not every Facebook Marketplace sale is taxable, and the ATO distinguishes between personal transactions and business activities. Understanding this distinction is the first step toward meeting your tax obligations correctly.

If you are simply selling personal items that you have used, such as old furniture, clothing, or electronics, these transactions are generally not taxable. This is because you are selling the items for less than or close to what you originally paid for them. However, if you are buying items with the intention of reselling them for a profit, or if you are creating goods to sell, the ATO may classify this as a business activity, and your profits will be subject to income tax.

The ATO considers several factors when determining whether your selling activity constitutes a business: the frequency and volume of your sales, whether you have a business plan, if you advertise your products, whether you maintain business records, and if your primary intention is to make a profit. If several of these factors apply to you, it is likely that the ATO will view your activities as a business for tax purposes.

Understanding Your Tax Obligations as a Marketplace Seller

Once you are classified as running a business on Facebook Marketplace, several tax obligations kick in. The most significant is income tax on your net profit. Your net profit is calculated by subtracting your business expenses from your total sales revenue. You will need to report this income in your annual tax return, and the amount of tax you pay will depend on your total taxable income, including any other employment income you may have.

For the 2025-26 financial year, Australia operates under a progressive tax system with the following income tax rates for Australian residents:

In addition to income tax, you may also be liable for the Medicare levy, which is currently set at 2% of your taxable income. If your business income pushes your total earnings above certain thresholds, you might also need to consider HECS-HELP repayment obligations if you have an outstanding study debt.

You should also be aware that if your Facebook Marketplace business is particularly profitable, you may need to make Pay As You Go (PAYG) instalments throughout the year rather than paying a lump sum at tax time. This system helps spread your tax liability across the financial year and can prevent a large tax bill from accumulating.

When Do You Need to Register for GST?

Goods and Services Tax (GST) registration becomes mandatory when your business has an annual turnover of $75,000 or more. For non-profit organisations, this threshold is $150,000. If you are selling on Facebook Marketplace and expect to reach these thresholds, you must register for GST within 21 days of hitting the threshold.

Once registered for GST, you will need to charge 10% GST on your sales and lodge Business Activity Statements (BAS) regularly, either monthly, quarterly, or annually depending on your registration details. You can also claim GST credits for the GST included in the price of business purchases and expenses. This includes things like shipping materials, business equipment, and any other goods or services you buy for your business.

Even if you are below the GST threshold, you can choose to register voluntarily. This might be beneficial if you have significant business expenses where you want to claim GST credits, or if you want to present a more professional image to customers. However, voluntary registration also means additional compliance obligations, so it is worth weighing the pros and cons carefully.

If you are unsure whether GST applies to your specific situation, consider consulting with a tax professional. They can help you understand your obligations and ensure you are meeting all compliance requirements without paying more tax than necessary.

Tax Deductions You Can Claim as a Facebook Marketplace Seller

One of the advantages of running a business is that you can claim tax deductions for expenses incurred in earning that income. As a Facebook Marketplace seller, there are numerous deductions you may be able to claim, provided they are directly related to your business activities and you have proper records to substantiate them.

Common deductible expenses include the cost of goods sold (what you paid for inventory), packaging materials, shipping and postage costs, bank fees for your business account, home office expenses if you run your business from home, internet and phone costs used for business, and fees charged by payment processors. You can also claim vehicle expenses if you travel to purchase inventory or deliver items to customers.

It is important to keep accurate records of all your business expenses throughout the financial year. The ATO requires you to keep records for at least five years, and these records should include receipts, invoices, bank statements, and any other documents that prove your expenses. Good record-keeping not only ensures you can claim all the deductions you are entitled to but also protects you in the event of an ATO audit.

If you have a regular job as well as your Facebook Marketplace business, you might also want to explore salary sacrifice arrangements with your employer to boost your superannuation contributions and potentially reduce your overall tax liability. This strategy can be particularly effective if your combined income from employment and your business pushes you into a higher tax bracket.

Record-Keeping and ATO Data Matching

The ATO has significantly increased its data-matching capabilities in recent years, and this includes monitoring transactions on platforms like Facebook Marketplace. The ATO receives data from digital platforms and payment processors, allowing them to cross-check the income you report in your tax return against the transactions recorded by these platforms.

This means that if you fail to report your Facebook Marketplace income, there is a good chance the ATO will detect the discrepancy. Penalties for failing to report income can be substantial, ranging from interest charges on the unpaid tax to penalties that can be up to 75% of the tax shortfall in cases of intentional disregard for the law. The best approach is always to be transparent and report all your income accurately.

To stay compliant, implement a robust record-keeping system from day one. This could be as simple as a spreadsheet tracking your sales and expenses, or you might choose to use accounting software designed for small businesses. Many accounting packages can integrate with online selling platforms and automatically track your transactions, making tax time much less stressful.

You should also set aside money for tax as you earn it. A good rule of thumb is to put aside at least 25-30% of your net profit into a separate savings account. This ensures you have the funds available when tax is due and helps you understand your true take-home pay from your business activities.

Conclusion

Navigating the tax landscape as a Facebook Marketplace seller in Australia does not have to be overwhelming. The key is to understand whether your selling activities constitute a business, keep accurate records of all your transactions, and meet your compliance obligations including income tax, GST registration (if applicable), and Medicare levy obligations.

By claiming all legitimate deductions, setting aside money for tax throughout the year, and staying informed about your obligations, you can run a profitable and compliant business on Facebook Marketplace. Remember that tax laws can be complex, and while this guide provides a solid overview, seeking professional advice tailored to your specific circumstances is always a wise investment.

Whether you are selling casually to clear out your garage or building a serious side income, understanding your tax responsibilities will help you avoid surprises and focus on growing your business. Stay organised, keep good records, and do not hesitate to seek help from a registered tax agent if you need it. The peace of mind that comes from knowing your tax affairs are in order is well worth the effort.