5 Shed Tax Mistakes Aussie Side-Hustlers Make (and How to Avoid Them)
Plenty of Australian side hustles live in the shed. Weekend fabrication jobs, an Etsy store’s worth of woodwork, small engine repairs, reselling, 3D printing. The money starts as beer money, then one day it’s real income, and real income comes with tax rules that most shed operators learn the hard way. Here are the five mistakes that come up again and again, and how to stay on the right side of each one.
1. Trying to write off the shed itself
The big one. You put up a $15,000 shed for the business, someone at a barbecue mentions the instant asset write-off, and you pencil in a $15,000 deduction. Unfortunately, that’s not how it works. A shed is a structural improvement, which puts it under the capital works rules: deducted at 2.5 per cent a year over 40 years, and only for the business-use portion. The instant asset write-off applies to depreciating assets, not buildings, and the threshold changes from year to year anyway, so always check what’s current before you count on it.
The good news is that the fit-out is a different story. Benches, shelving, tools, machinery, a compressor, security, a decent heater: these are depreciating assets and are treated far more generously. Getting the split right between the building and what’s inside it is the difference between a clean claim and an ATO please-explain.
2. Claiming a share of the mortgage without knowing the catch
If the shed is genuinely your place of business, you may be able to claim a slice of occupancy costs like mortgage interest, rent, rates and insurance. Sounds great. Here’s the catch nobody mentions: once you claim occupancy costs on part of your home, that part can lose its main residence exemption, which means a portion of the profit when you eventually sell the house may be taxed.
Running expenses are the safer everyday claim: the power for the welder, lighting, internet, cleaning, and depreciation on the gear. Claiming running costs alone doesn’t create the capital gains problem. The ATO’s guide to home-based business expenses explains the two categories. Read it before you claim the mortgage, not after.
3. Calling it a hobby when the ATO would call it a business
The line between hobby and business isn’t about size. It’s about how you operate: regular activity, an intention to make a profit, repeat customers, business-like records. Sell a restored mower once a year and it’s a hobby. Take orders, buy materials to fill them, and post your work every weekend, and you’re probably running a business whether you meant to or not.
The mistake cuts both ways. Treat a genuine business as a hobby and you’re leaving income off your return, which the ATO’s data-matching is increasingly good at spotting, especially through marketplace platforms. Call a hobby a business and claim its losses, and you’ll find hobby losses aren’t deductible, while business losses have their own tests to pass. Be honest about which one you’re running.
4. Drifting past $75,000 without registering for GST
GST registration becomes compulsory when your turnover hits $75,000, and it’s measured on a rolling basis, not just at tax time. Side hustles cross the line quietly. A few good months, one big custom order, and the shed is suddenly over the threshold while you’re busy sanding.
The sting: if you should have registered and didn’t, the ATO can treat your prices as having included GST all along, which means handing over one-eleventh of your sales out of your own pocket, plus interest. Keep an eye on the rolling number, and register within 21 days once you cross or can see you will.
5. Running it on a shoebox and the family bank account
Business income through the personal account, receipts in a drawer, no system. It works until it doesn’t. You need to keep business records for five years, and come tax time, untangling twelve months of mixed transactions costs more in accountant hours than doing it right would have cost all year.
The fix is cheap and boring: a separate bank account from the first sale, and cloud accounting software so the records build themselves. You’re kitting out the shed properly anyway, proper lighting and all, so give the paperwork the same treatment. And once the hustle grows into something with real turnover, hand the books over. Firms like Hopkan Partners provide Xero bookkeeping services to small businesses right across Australia, remotely, which suits a business run from a shed in the backyard just fine.
