So, you’ve started making money on the side. Could be detailing cars on weekends, flipping furniture, or picking up gigs on Airtasker. Either way, if there’s money coming in, Uncle Sam (or in our case, the ATO) is going to want a slice of it. Doesn’t matter if it’s fifty bucks or five grand — if it’s income, it counts.
This post is about keeping yourself out of hot water with the tax office. It’s not about loopholes or shady tricks. Just real, simple ways to keep your side hustle money sorted without ending up with a nasty surprise come tax time.
Why You’ve Gotta Take Side Hustle Tax Seriously
Look, I get it. It’s easy to think, “It’s just a few bucks here and there, who’s gonna notice?” But the ATO has sharp eyes, especially with bank transactions and online platforms now automatically reporting your income. Even PayPal and Uber send them info these days.
If you’re making money outside your regular job — selling stuff, offering a service, freelancing — you’ve got to treat it like a business, even if it’s casual. That means tracking your income, keeping records, and knowing what to put on your tax return.
1. Track Every Dollar You Make
Use a simple system.
You don’t need fancy software or an accountant on speed dial. A spreadsheet can do the job, or an app like:
- Wave (free, good for beginners)
- QuickBooks Self-Employed
- Hnry (popular in Australia — they handle tax and super for contractors)
- Xero (a bit overkill unless you’ve got lots of clients)
Every time money comes in, jot down:
- Date
- Amount
- What it was for (e.g., “dog walking – Saturday morning”)
- Who paid you
Even if it’s cash, track it. Don’t assume the ATO won’t see it — they’re not stupid.
2. Keep Work Expenses Separate
This one’s simple: don’t mix your side hustle spending with your personal stuff. If you’re buying cleaning products for your weekend jobs, or tools for gigs, keep that separate from groceries and fuel for your own car.
Best way? Open a second bank account.
Doesn’t need to be a business account. Just a free savings or transaction account. Use it for all side hustle income and expenses. Makes life 10x easier come tax time.
Bonus tip: If you’re doing gigs that involve driving, like deliveries or mobile car wash stuff, track your mileage. You can claim that.
3. Know What You Can Claim
This is where you can save some tax, legally. If you’re spending money to earn money, chances are you can claim it.
Common deductible expenses:
- Equipment (cleaning gear, tools, tech)
- Marketing (business cards, FB ads, flyers)
- Work-related fuel or mileage
- Home office use (portion of power/internet)
- Website costs (hosting, domain names)
But don’t push your luck. If you try to claim your whole rent or your new couch as a business expense, expect a knock on the door.
Keep your receipts, invoices, or at least a digital record. The ATO won’t just take your word for it.
4. Put Money Aside for Tax
This one trips up heaps of new side hustlers. You get paid, spend the money, and then tax time comes… and boom — you’re short a few thousand bucks.
So here’s the trick: stash away 20–30% of everything you earn.
Chuck it into a high-interest savings account. Don’t touch it. That’s your tax buffer. If you end up owing less, great — you’ve got extra savings. If you owe more, at least you’re not scrambling.
5. Register for an ABN (If You Need One)
Not every side hustle needs an ABN. But if you’re invoicing people, selling services, or running it like a proper business — you probably do.
Getting one’s free. Just head to the ABR website and register. It only takes 5–10 minutes.
Also: if you’re making over $75,000 a year from your side hustle (before costs), you have to register for GST. Most folks starting out won’t hit that — but it’s something to keep in mind if you’re scaling up.
6. Use Invoicing to Stay Professional (and Organized)
Even if you’re just mowing lawns for cash, using an invoice makes things clear. It shows you’re taking it seriously. Plus, it gives you and your client a record in case anything’s questioned later.
There are free invoice templates online, or apps like Wave, Invoice Simple, or Canva (yes, really) can spit one out in minutes.
Include:
- Your name + ABN (if you’ve got one)
- Client name
- What the job was
- Amount charged
- Payment method and due date
It’ll also make tax time way smoother, trust me.
7. Use an Accountant (or at Least Ask One)
If your side hustle’s starting to earn real money — say, over $10k a year — then get professional help. Even just a once-a-year meeting to make sure you’re on track.
A good accountant will:
- Help you claim the right things
- Keep you compliant
- Spot ways to save tax
- Give advice on super, GST, and business structure
It’ll probably cost $200–$400, but they might save you more than that in one go.
8. Declare It — Don’t Risk It
Look, if you’re making under the tax-free threshold (currently $18,200), you probably won’t owe anything anyway — but you still need to declare your income.
Fail to do that, and if the ATO finds out later (which they often do), you could be up for:
- Fines
- Interest
- Backdated tax
It’s not worth the risk. Be honest, play it straight, and use the system to your advantage instead of dodging it.
Quick Recap: What You Should Do
✅ Track every cent you earn
✅ Keep business stuff separate
✅ Save 20–30% of income for tax
✅ Claim legit expenses
✅ Use an ABN if needed
✅ Invoice properly
✅ Get advice if you’re unsure
✅ Always declare your income
Final Thoughts
Side hustle money can be bloody great. A bit of extra cash for bills, holidays, tools, or just breathing room. But it’s still income. Treat it properly, and it won’t bite you in the backside later.
Think of it like looking after a ute — you service it, keep it clean, fix what needs fixing. Same goes for your side hustle finances. Bit of effort now saves you drama down the track.
Keep things tidy, stash some tax money, and you’ll stay ahead of the game.
Got a question about claiming something or worried you’re not doing it right? Drop it in the comments or flick me a message on SideHustleQuest.com — happy to help where I can.
Cheers,
Kim
No fluff. No BS. Just honest side hustle advice.
