Quick answer: In Australia, there is no tax-free side-hustle threshold. From the first dollar your activity counts as a business, the profit is added to your salary and taxed at your marginal rate — and the ATO probably already knows about it, because the platform you earn through reports your income directly. What most side hustlers get wrong is not the declaring part. It is the five traps around it: the hobby-vs-business line, the GST trigger, the second-job withholding debt, the loss you cannot use, and the personal services income rules that quietly cancel your deductions.
Meet Maya. She teaches full-time in Brisbane on $78,000 a year and sells handmade ceramics on Etsy on weekends. In 2026-27 her little shop turns over $22,000 and, after clay, kiln hire, postage and platform fees of $6,400, nets $15,600. This guide follows her numbers — and three other real scenarios — through every rule that actually applies.
Step 1: Is it a hobby or a business?
This is the question everything else hangs on. The ATO does not care what you call it. It weighs the indicators in Taxation Ruling TR 97/11: whether the activity has a significant commercial purpose, whether you have more than just an intention to engage in business, whether there is a purpose of profit and a prospect of profit, repetition and regularity, whether it is run the same way an ordinary business in that line is run, whether it is planned and organised in a business-like manner, and its size, scale and permanency.
| Signal | Looks like a hobby | Looks like a business |
|---|---|---|
| Why you do it | Fun, recreation, covering costs | To make a profit, with a plan |
| How often | Occasional, when you feel like it | Regular, scheduled, repeated sales |
| How it is run | No records, no marketing, no separate money | Records, pricing, marketing, separate bank account |
| Scale | A few sales a year to friends | Volume, repeat customers, growing turnover |
| Money | Losses absorbed happily | Losses tracked, pricing adjusted to fix them |
Maya sells every weekend, prices with a margin, keeps a spreadsheet, and bought a second kiln to meet demand. That is a business, even though it started as a hobby and her day job pays more. The transition matters: once an activity crosses into business territory, its income becomes assessable and its expenses deductible. Before that line the reverse applies — hobby income is generally not assessable, and hobby expenses are never deductible. A one-off clear-out of your own stuff on Facebook Marketplace is a private sale, not a business; listing fifty near-identical imported phone cases is.
The ATO already knows: platform reporting
Under the Sharing Economy Reporting Regime, digital platforms report your earnings straight to the ATO. Ride-sourcing and short-term accommodation platforms have reported since 1 July 2023; every other platform — marketplaces, food delivery, task apps, content platforms — since 1 July 2024. The ATO matches that data against your tax return.
This is why “the ATO won’t notice $8,000 from Airtasker” is a fantasy. They get the gross figure, not your profit — which is exactly why declaring it properly, with your legitimate deductions, is in your interest. If your return shows nothing, the platform’s $22,000 still shows up on their side.
Worked example: what Maya actually owes
Maya’s total taxable income is her salary plus her side-hustle net profit: $78,000 + $15,600 = $93,600. Using the 2026-27 resident rates:
| Step | Calculation | Amount |
|---|---|---|
| Tax on $93,600 | $4,020 + 30% × ($93,600 − $45,000) | $18,600 |
| Medicare levy (2%) | 2% × $93,600 | $1,872 |
| Total liability | $18,600 + $1,872 | $20,472 |
| Already withheld from salary* | Tax $13,920 + Medicare $1,560 | $15,480 |
| Extra tax on the side hustle | $20,472 − $15,480 | $4,992 |
*Her employer withheld tax on the $78,000 salary only, at the standard rates, with the tax-free threshold claimed once.
Notice the pattern: $4,992 is exactly 32% of her $15,600 profit — 30% marginal rate plus the 2% Medicare levy. That is the shortcut worth memorising: every extra dollar of side-hustle profit is taxed at your marginal rate plus 2%. On a $140,000 salary the same profit costs 39 cents in the dollar; on $200,000, 47 cents. Before you price a weekend job, work out which bracket you are already in. The profit also counts towards HECS-HELP repayment income and can tip you over the Medicare levy surcharge thresholds. Side income never lives in a neat separate box.
Do you need an ABN?
If your activity is a business, yes — and applying is free. Two practical reasons beyond compliance. First, without an ABN, businesses paying you must withhold 47%: a company hiring your side business without an ABN on file must withhold at the top rate. You get it back at tax time if you overpaid, but your cash flow is wrecked for months. Second, you need an ABN before you can register for GST. If you are genuinely an employee of the platform paying you — not a contractor — you are not entitled to an ABN for that work, and GST does not apply. The label on the contract does not decide this; the substance of the relationship does.
GST: the $75,000 trigger is forward-looking
Most side hustles must register for GST once GST turnover reaches $75,000. Three things people miss:
- Turnover means gross business income, not profit. Maya’s turnover is $22,000, not $15,600. If your costs are high, you can be over the threshold while barely making money.
- It is measured two ways — and either one triggers it. Current turnover (this month plus the previous 11 months) or projected turnover (this month plus the next 11 months). If you can see a big contract coming that will push you over, you must register before you get there, not after you arrive.
- You have 21 days once you hit the threshold. Not “by tax time”. Twenty-one days.
Worked example — Dan. Dan does Airtasker jobs averaging $6,800 a month — projected turnover $81,600, over the threshold even though his bank balance this month is modest. He must register within 21 days of the point his projected turnover hit $75,000. Once registered he charges 10% GST, lodges BAS returns, and claims GST credits on business purchases — the credits are the upside everyone forgets. Voluntary registration below $75,000 can also pay off if your expenses carry a lot of GST.
The rideshare exception: ride-sourcing drivers must register for GST from the very first dollar. Food delivery is different: the $75,000 threshold applies.
The second-job trap: claiming the tax-free threshold twice
If your side hustle is a second job (employment, not business), the trap is different and very common. You can only claim the $18,200 tax-free threshold from one payer — usually the one who pays you the most. Claim it from both and both employers under-withhold.
Worked example. Job 1 pays $50,000 with the threshold claimed; Job 2 pays $30,000, also with the threshold claimed. Combined income is $80,000, on which tax plus Medicare comes to about $16,120. But the two employers together withheld only about $8,890 — each taxed you as though your first $18,200 was tax-free. The tax-time debt is roughly $7,200. Tell your second employer to withhold at the “no tax-free threshold” rate, or set the money aside yourself. If you have a HECS-HELP debt, tell every payer: repayments are calculated on total repayment income.
What you can claim — and the $1,000 standard deduction
Business deductions follow one rule: the expense must be incurred in gaining your business income, and if something is used for both business and private purposes, you claim only the business portion. That apportionment is where most over-claims happen.
| Common side-hustle expenses | What you can claim |
|---|---|
| Materials, stock, ingredients | Full cost of what you used for the business |
| Platform fees and commissions | Full amount |
| Car expenses | Business-use portion only — cents-per-km (91c/km in 2026-27) or logbook method |
| Home office | Fixed-rate method (70c per hour) or actual costs, business portion only |
| Phone and internet | Business-use portion only, supported by a usage diary |
| Tools and equipment | Depreciation or immediate write-off if eligible; business portion only |
| Training and courses | Only if it maintains or improves skills for your current business — not a new one |
The 2026-27 $1,000 standard deduction. From 2026-27, eligible taxpayers can claim a standard deduction of up to $1,000 for work-related expenses without receipts or itemising, reduced dollar-for-dollar by covered work deductions actually claimed. It applies to work-related expenses on your labour income — your salary. Your side-hustle business expenses are claimed separately as business deductions. The two systems sit side by side, but the same dollar can never be claimed twice: claiming the $1,000 standard deduction and the same home-office hours as a business expense is double-dipping. Keep records for five years — a photo of a receipt taken on the day beats a shoebox of faded paper in June.
The loss trap: your side-hustle loss may not save you a cent
This is the gap nobody warns side hustlers about. If your business makes a loss, you cannot automatically use it to cut the tax on your salary. The non-commercial loss rules (Division 35) defer the loss unless you pass the tests.
Worked example — Priya. Priya earns $90,000 as a nurse and runs a candle business that brings in $12,000 and costs $20,000 — a loss of $8,000. Her income is under the $250,000 income requirement, so she gets to the four tests. But her business assessable income ($12,000) is under the $20,000 threshold; the business has no profit history in three of the past five years; it uses no $500,000 real property; and it has no $100,000 of other assets. She fails all four tests. The $8,000 loss is deferred — carried forward to offset future profits of the same business. It does nothing for this year’s tax bill.
Change one fact and the answer flips: if Priya’s business income had been $22,000 with $30,000 of expenses (still an $8,000 loss), she passes the assessable income test and can offset the loss against her salary — saving about $2,560 at her 32% marginal rate. The difference between a usable loss and a deferred one can be a single invoice. If your business is in primary production or the professional arts and your other income is under $40,000, a separate exception may apply instead.
The PSI trap: freelancers, read this twice
If your side hustle income comes mainly from your personal skills or efforts — freelance writing, design, consulting, IT contracting — the personal services income (PSI) rules may apply. The headline trap is the 80% rule: if 80% or more of your PSI comes from one client and their associates, you cannot self-assess as a personal services business using the unrelated-clients, employment or business-premises tests. Your only self-assessment path is the results test (paid to produce a result, supplying your own tools, fixing your own mistakes — for at least 75% of your PSI), or an ATO determination.
Why it matters: if the PSI rules apply and you work through a company or trust, the income is attributed back to you personally — no splitting it with a spouse, no parking it in a company at a lower rate. And deductions are limited: no occupancy costs (rent, mortgage interest, rates, land tax for your home office), no payments to associates for non-principal work (paying your spouse for “admin” does not count), and restricted car expenses. Jake, a freelance designer with one agency client providing 85% of his income, discovers this when his company return is unwound and his $6,000 of home-office rent and $4,000 of spouse admin pay are both denied. If one client dominates your income, diversify, make sure you genuinely meet the results test on your contracts, or get advice before setting up a structure to split income.
Cash, barter and free stuff are still income
Three forms of income side hustlers routinely forget. Cash jobs are assessable exactly like bank transfers. Barter is assessable too: if you swap services, the market value of what you receive is income. And free products and gifts count: a creator sent $3,000 of skincare to review keeps $3,000 of assessable income at market value, even with no cash changing hands. Sponsorships, subscriptions, tips and gratuities are all assessable.
PAYG instalments: the quarterly surprise
Once your business or investment income is expected to generate a tax bill of $1,000 or more, the ATO generally enrols you in PAYG instalments — quarterly payments towards next year’s tax, based on your previous year’s income. Maya, with a ~$5,000 side-hustle tax bill, will almost certainly get an instalment notice after her first return. It is not a penalty; it stops you copping the whole bill at once next year. If your income drops you can vary an instalment down — but vary it too low and interest applies. Otherwise set aside your marginal rate plus 2% from every payment the day it lands: for Maya, 32 cents in every dollar into a separate account.
Common mistakes
- Treating $75,000 as a profit threshold. It is turnover — gross income. Check it monthly, on both the backward and forward measures.
- Claiming the tax-free threshold from two employers. One payer only, or a ~$7,200 surprise on $80,000 combined income.
- Assuming a loss offsets your salary. Non-commercial loss rules defer it unless you pass the income requirement and one of the four tests.
- Ignoring PSI. One dominant client plus a company structure plus spouse admin pay is the classic unwinding.
- Forgetting barter and freebies. Market value, assessable, declared. Claiming 100% of mixed-use expenses (phone, car, internet) instead of apportioning them.
- Spending the GST. Once registered, the 10% you collect is not yours. Separate it the day it arrives.
Set-up checklist for a new side hustle
- Decide honestly whether it is a business using the TR 97/11 indicators — and re-check every year.
- Apply for an ABN (free) and open a separate bank account for the business.
- Work out your marginal rate plus 2% and set that aside from every payment.
- Check your GST turnover monthly — backward and forward.
- Fix your TFN declarations: threshold from one payer only; tell every payer about your HECS-HELP debt. Start a logbook or diary for car and home-office use from day one.
- If one client is 80%+ of your income and you sell personal services, check the PSI rules before structuring anything.
- Keep every record for five years.
FAQ
How much can I earn from a side hustle before paying tax?
There is no separate side-hustle threshold. If the activity is a business, the first dollar of profit is assessable. The $18,200 tax-free threshold applies once, to your total taxable income from all sources.
Do I need an ABN for a side hustle?
If the activity is a business, yes — and it is free to apply. Without one, businesses paying you must withhold 47% from your payments, and you cannot register for GST. If you are genuinely an employee, you are not entitled to an ABN for that work.
When do I have to register for GST?
When your GST turnover — gross business income — reaches $75,000 on either the current (past 12 months) or projected (next 12 months) measure. You then have 21 days to register. Ride-sourcing drivers register from the first dollar.
Can my side-hustle loss reduce my salary tax?
Only if you pass the non-commercial loss rules: your income must be under $250,000, and you must pass one of four tests (assessable income of $20,000+, profit in 3 of 5 years, $500,000+ real property used, or $100,000+ other assets). Otherwise the loss is deferred against future profits of the same business.
Does the ATO know about my platform income?
Almost certainly, yes. Under the Sharing Economy Reporting Regime, platforms report your gross earnings to the ATO and the data is matched against your return. Declare the gross income and claim your legitimate deductions.
What if my side hustle is just freelance work for one client?
Then the personal services income rules are your biggest risk. If 80% or more of your PSI comes from one client, you can only self-assess as a personal services business through the results test or an ATO determination — and if the PSI rules apply, the income is attributed to you and several deductions are denied.
The bottom line
Maya’s ceramics shop is a business, and that is good news: her $6,400 of real costs are deductible, her GST position is simple at $22,000 turnover, and her $4,992 tax bill is predictable instead of a shock. The side hustlers who get hurt are the ones who treat the money as invisible — no ABN, no records, no set-aside, and a surprise debt in July. Run it like the small business it is: separate money, monthly GST check, marginal-rate-plus-2% set aside, and a hard look at losses and PSI before you assume they will save you tax. Use our income tax calculator to model your combined salary-plus-side-hustle tax, and the GST calculator to check where you sit against the $75,000 threshold.
Related reading: GST for Small Business, Sole Trader Tax: ABN vs ACN, Tax Deductions Checklist, and HECS-HELP Repayment 2026-27. Official sources: the ATO’s non-commercial loss rules, its personal services income appendix, and business.gov.au on tax registrations.
