Evidence-backed. Sourced from the ATO media centre, NSW Small Business, CPA Australia, Accountants Daily, Tax Falcon, Holding Redlich, Aspley Jandera, and Argent Advisory. General information only — not financial or tax advice. Your specific tax obligations depend on your individual circumstances. Consult a registered tax agent before lodging. Last updated: June 2026.
⚡ Key Takeaways
- The Sharing Economy Reporting Regime (SERR) requires electronic distribution platforms (eBay, Airbnb, Uber, Airtasker, Facebook Marketplace) and payment facilitators (PayPal, Square) to report transaction-level data directly to the ATO. Platforms report twice a year, giving the ATO near-current-year visibility of your earnings. [1][2][3]
- 2025–26 is the first full year under the complete SERR regime. Ride-sourcing and short-term accommodation platforms started reporting on 1 July 2023. All other reportable transactions (online sales, task platforms, marketplaces) came in on 1 July 2024. The ATO has data on virtually every significant platform from this financial year. [2][3][4][1]
- The ATO’s position is unambiguous: “when you provide your labour, skills or goods for a fee, you need to report this income in your tax return” — regardless of whether you use a digital platform, are paid in cash, or consider yourself a “casual seller.” There is no de-minimis hobby threshold in Australian tax law. [5][6][2]
- Side hustlers who under-report face the ATO reconstructing their income from platform data and assessing extra tax plus shortfall penalties (often 25–50% of the tax shortfall) plus general interest charge — compounding over multiple years if the under-reporting goes back before SERR launched. [10][3]
- Ride-sourcing (Uber, DiDi, Ola) is treated differently from other gig work: GST registration is compulsory from the first dollar earned, regardless of total turnover. For all other side hustles, GST applies once turnover reaches or is expected to reach $75,000 in a 12-month period. [8][6][2]
The New Side Hustle Tax Rules — The ATO Is Now Watching Online Marketplace Sales
By The Fine Print editorial team | Last updated: June 2026 | 12 min read | ⚠️ Not financial advice
A few years ago, income from eBay sales, Airbnb weekends, Uber trips and Airtasker jobs existed in a grey zone. Many Australians either didn’t know it was taxable or assumed the ATO wouldn’t find out about relatively small amounts. That grey zone is now closed. The Sharing Economy Reporting Regime went fully live in 2024, and 2025–26 is the first complete financial year where virtually every significant gig platform, marketplace and payment facilitator reports directly to the ATO — twice a year, at the transaction level. The ATO has your data before you lodge your return. This guide explains exactly what SERR covers, what your obligations are, what counts as a business versus a hobby, and what to do before you file.📋 What’s in This Guide
What SERR Is and Which Platforms Report
The Sharing Economy Reporting Regime is a legislative framework requiring electronic distribution platforms (EDPs) and payment facilitators to collect and report transaction data to the ATO. It’s not an audit program — it’s structural infrastructure. Platforms don’t decide whether to report; they’re legally required to. [1][2][3]Platforms covered by SERR (reporting to ATO from 2024–25 onwards):
- Ride-sourcing: Uber, DiDi, Ola, Bolt (reporting from 1 July 2023)
- Short-term accommodation: Airbnb, Stayz, Booking.com (from 1 July 2023)
- Task and gig platforms: Airtasker, ServiceSeeking, hipages (from 1 July 2024)
- Online marketplaces: eBay, Amazon AU, Etsy, Facebook Marketplace with payment processing (from 1 July 2024)
- Delivery platforms: Uber Eats, DoorDash, Menulog (from 1 July 2024)
- Payment facilitators: PayPal, Square, Stripe — merchant receipts (from 1 July 2024)
Reporting is twice a year. The ATO receives transaction-level data — individual payments, not just totals — giving it visibility of your earnings as they occur during the year, not just at year-end. [2][3][4][1]
Your Tax Obligations — Income, ABN, GST
The ATO treats most platform earners as sole traders, not employees. That has specific implications for how your income is taxed and what registrations you may need. [8][6][2]Income tax
All income from platforms is assessable — there is no de-minimis threshold, no hobby exemption in the dollar sense, and no rule that says small amounts don’t count. Every dollar you earn from gig work, marketplace sales with profit intent, or sharing economy activities is taxable at your marginal rate (after deductions). You declare it as business income in your tax return, not as salary or wages. [5][6][2]ABN
If you’re running a business (see hobby vs business below), you should have an Australian Business Number. An ABN is required for most platform registrations anyway, and not having one when you’re operating as a business can complicate invoicing, deductions and GST registration. Registering for an ABN is free at abr.gov.au. [8][6]GST
Two rules apply depending on the type of work: Ride-sourcing (Uber, DiDi, Ola) — you must register for GST from the first dollar of earnings, regardless of total annual turnover. This is a specific rule that has applied since 2015 and has not changed. All other gig and marketplace income — GST registration is required once your turnover reaches or is expected to reach $75,000 in any 12-month period. You must register within 21 days of reaching that threshold. Once registered, you charge 10% GST on taxable supplies and remit it to the ATO via BAS. [9][6][2][8]Hobby vs Business — The ATO’s Test
The most common confusion in the side hustle space is whether a particular activity is a “hobby” (generally not taxable) or a “business” (fully taxable). The ATO’s test is not about scale or regularity alone — it’s about intent to make a profit. [6][8][10]Indicators the ATO uses to assess business vs hobby:
- You intend to make a profit (even if you haven’t yet)
- You repeat the activity regularly
- You organise the activity in a business-like way (pricing, sourcing, marketing)
- The activity is similar to what others do commercially
- You have or expect scale — size and volume consistent with a business
⚠️ The “I’m just a hobby seller” risk: Claiming hobby status to avoid declaring income is the core of the SERR risk. With transaction-level data from eBay, Etsy, Facebook Marketplace and payment facilitators now flowing to the ATO, consistent profitable selling will be visible. The ATO can (and does) issue letters asking taxpayers to explain why platform income doesn’t appear in their return. At that point, “I thought it was just a hobby” is not a defence if the facts suggest intent to profit. [4][3][8]
What Happens If You Under-Report
The consequence structure for under-reported side hustle income is straightforward and can be painful. If the ATO identifies a discrepancy between your platform data and your return, it can: issue an amended assessment for the extra tax; apply a shortfall penalty (typically 25% of the tax shortfall for a careless omission; 50% for deliberate under-reporting); and charge the General Interest Charge, which compounds daily on the unpaid amount. [10][3][2]The compounding effect is significant for people who have been active on platforms since before SERR launched in 2023. If you’ve been earning gig income since 2021–22 without declaring it, and the ATO reconstructs that history from platform data, you’re looking at three or four years of back-tax plus interest plus penalties — on top of correcting the current year. Accountants Daily’s 2024 commentary described SERR as something that “will expose huge tax underpayments” in the gig economy precisely because this compounding risk applies to years of historical non-disclosure. [4][10][3]The right move if you have under-reported in prior years is to make a voluntary disclosure to the ATO before they contact you. A voluntary disclosure before any ATO contact typically reduces the shortfall penalty significantly and demonstrates good faith. [3][6][11]The Deductions You Might Be Missing
The tax risk of side hustle income runs in both directions. Failing to declare income is the obvious problem. But failing to claim legitimate deductions when you are running a business is an equally real cost — you overpay tax compared to someone with the same income who has structured their activity correctly. [11][2][6]💡 Common deductions side hustlers miss: Platform fees and commissions (eBay final value fees, Airbnb host fees, Uber commission, Airtasker platform fees); advertising and promotional costs; a work-related portion of home internet and phone; a portion of home-office costs using the WFH methods; vehicle expenses for gig work or delivery (logbook method or cents-per-km); packaging materials and postage for sellers; cost of goods purchased for resale; and subscriptions or software used for the business. These deductions reduce your taxable income from the platform activity, often materially. You can only claim them if you treat the activity as a business and keep records. [11][2][6]
✅ Three Actions Before You Lodge
Action 1: Download your platform data and compare it to what you plan to declare
From every app or marketplace you used in 2025–26 — eBay, Facebook Marketplace, Etsy, Airbnb, Uber, Airtasker, DoorDash, PayPal — download your annual earnings statement or transaction history. Add up the gross income across all platforms. Compare that total to what you’ve included (or plan to include) in your tax return as business income. If there’s a gap, close it before you lodge. The ATO already has this data from platform SERR reporting — your return just needs to match it. Don’t wait for a letter from the ATO prompting you to amend; that triggers the formal compliance pathway. [1][2][3]Action 2: Decide whether you’re running a business, not a hobby
Ask honestly: Do I buy stock to resell for profit? Do I list regularly on a platform with the intent to earn? Do I organise my selling in a business-like way? If the answer to any of those is yes, the ATO is likely to treat you as a sole trader — and that income is fully taxable. If your turnover from all platforms combined is approaching or above $75,000 in 2025–26, talk to a registered tax agent now about ABN and GST registration. Retrospective GST liabilities — where you should have registered earlier and didn’t — compound quickly and the 21-day registration window is strict. If you’re clearly a hobby seller (one-off personal items, no profit intent, irregular), document that position in case the ATO asks. [8][6][2]Action 3: Build a basic side-hustle bookkeeping record from 1 July
For future years (and to tidy up 2025–26), create a simple tracking system for each platform: gross income received; platform fees deducted; advertising or promotional costs; materials or inventory purchased; delivery, packaging or transaction fees. A spreadsheet with one row per transaction, or a bookkeeping app like Xero, MYOB or even a free Google Sheet template, is sufficient for most small side hustles. When SERR data arrives in your ATO pre-fill for future years, you can reconcile it instantly against your own records and identify all the legitimate deductions you’re entitled to claim — instead of guessing at tax time. [2][11][3]❓ Frequently Asked Questions
Does the ATO know about my eBay or Airbnb earnings?
Yes. SERR requires those platforms to report transaction-level data to the ATO twice a year. The ATO has your data before you lodge. [1][2][3]Is my side hustle income taxable?
Yes. There’s no hobby threshold in Australian tax law. Any income from labour, skills or goods for a fee must be declared. [5][6][2]When do I need to register for GST?
Ride-sourcing: immediately, from first dollar. All other side hustles: when turnover reaches or is expected to reach $75,000 in 12 months. You have 21 days to register. [9][6][2]What’s the difference between hobby and business?
Intent to profit. Regular, profit-driven selling or gig work = business, even if it’s a side activity. Selling personal possessions = generally not taxable. [6][8][10]What are the penalties for undeclared income?
Back tax + shortfall penalty (25–50% of unpaid tax) + General Interest Charge compounding daily. Voluntary disclosure before ATO contact reduces penalties. [10][3][6]⚖️ The Fine Print Verdict
SERR has changed the fundamental risk calculation for anyone earning money through a digital platform. The previous assumption — that small or irregular income wouldn’t be found — is simply no longer valid. Transaction-level data from eBay, Airbnb, Uber and every major payment processor flows to the ATO twice a year, and the ATO’s data-matching systems are designed to find the gap between what platforms report and what you declare. The response isn’t complicated: download your platform data, declare what you earned, claim the legitimate deductions you’re entitled to, and make sure your return reflects reality. If you’ve been under-reporting for prior years, a voluntary disclosure before the ATO contacts you is the lower-cost path. The people who get hurt are those who assume the old rules still apply, or who conflate “the ATO hasn’t contacted me yet” with “I’m fine.” In 2025–26, with the regime fully operational for the first time, the matching will become more systematic and the gaps will become harder to miss.
👉 Download your platform data. Declare what you earned. Claim your deductions. The ATO has the data already — your return just needs to match it.
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- NSW Small Business, “If you earn through an app or platform, the ATO will know — be tax ready,” smallbusiness.nsw.gov.au/news-podcasts/news/if-you-earn-through-an-app-or-platform-the-ato-will-know-be-tax-ready
- Tax Falcon, “Gig economy and side hustle tax guide 2026,” taxfalcon.com.au/post/gig-economy-side-hustle-tax-guide-2026
- WorldwideAdvisory, “Gig economy tax tips — how to stay ahead of the ATO’s data-matching activities,” worldwideadvisory.au/post/gig-economy-tax-tips-how-to-stay-ahead-of-the-ato-s-data-matching-activities
- Accountants Daily, “Gig economy reporting regime will expose huge tax underpayments,” accountantsdaily.com.au/business/18085-gig-economy-reporting-regime-will-expose-huge-tax-underpayments
- ATO media centre, “Side hustles are front of mind this tax season,” ato.gov.au/media-centre/side-hustles-are-front-of-mind-this-tax-season
- Aspley Jandera, “The side hustle survival guide,” aspleyjandera.com.au/blog/the-side-hustle-survival-guide
- Silver Young, “ATO cracks down on digital side hustles — new rules for gig economy income in 2025,” silveryoung.com.au/ato-cracks-down-on-digital-side-hustles-new-rules-for-gig-economy-income-in-2025/
- PRwire, “Selling on Facebook Marketplace — the ATO might be watching,” prwire.com.au/pr/120807/selling-on-facebook-marketplace-the-ato-might-be-watching
- TaxStore, “ATO compliance — the key focus for year-end 2025,” taxstore.com.au/news/ato-compliance-the-key-focus-for-year-end-2025
- Holding Redlich, “Tax in the gig economy,” holdingredlich.com/tax-in-the-gig-economy
- Argent Advisory, “ATO small business tax compliance,” argentadvisory.com.au/ato-small-business-tax-compliance/
- Quaderno, “Digital taxes — Australia’s GST,” quaderno.io/blog/digital-taxes-australias-gst/
- Parliamentary Budget Office, “Digital services tax — economic and fiscal analysis,” pbo.gov.au/sites/default/files/2025-06/PBO-ECR-2025-3704-Digital services tax.pdf
- Accountants for eCommerce, “Ecommerce tax updates,” accountantsforecommerce.com.au/accounting/ecommerce-tax-updates/
This article is general information only and does not constitute financial or tax advice. SERR obligations and tax treatment are based on ATO and government guidance current as at June 2026. Your specific obligations depend on your income type, turnover and individual circumstances. Consult a registered tax agent before lodging. The Fine Print 🇦🇺 is not affiliated with the ATO or any platform mentioned.