No trade sinks more of its own money into gear than a mechanic. A roll cab packed with Snap-on, Kincrome or Sidchrome, a scan tool that earns its keep on one stubborn fault, the specialty pullers bought once and leaned on for a decade: you funded it, usually on a tool-truck plan that follows you between workshops. While you're on wages, all of it is deductible. What throws mechanics is not whether a tool qualifies, but the mechanics of claiming it, and that comes down to one figure and one habit you keep all year.
The $300 line
The cost of a tool decides how you claim it, and this one line underpins the whole page.
The whole cost comes off in the year of purchase. One spanner, a replacement socket, a budget code reader, a pry bar you snapped: each under $300 lands on this year's return.
You draw the decline in value across its effective life. Pick prime cost, an even amount each year, or diminishing value, heavier up front, and hold to it for that tool.
Two adjustments apply: private use, and part-year ownership. Run a multimeter or a trolley jack across your own cars at home and only the work-use portion is yours to claim; buy a tool mid-year and only the days you held it count. Mechanics tend to trip in opposite directions here, writing off a pricey scan tool all at once when it belongs spread across the years, or leaving a $600 torque wrench off entirely because it can't come off in one hit. It is claimable, just gradually.
The set trap on a kit
This is the rule that stings a mechanic hardest, because it kills the obvious dodge. You can't slide a costly kit under the $300 line by pointing to the small price on each piece inside it.
A $480 socket set is over $300 as a set, so no instant write-off, even though not one socket in the tray cost anywhere near that alone.
When a set, or a batch of identical or near-identical items you begin holding in the same year, adds up past $300, the whole lot is depreciated regardless of how cheap each piece is. That's the ATO's position, and it bites right when a mechanic does the natural thing and grabs a big kit in one go off the truck. A later one-off replacement is another matter: swap a single worn socket down the track and it belongs to no set purchased that year, so the whole cost comes off the year you buy it.
Depreciation keeps going
A tool over $300 is not a one-year event on your return. Its decline in value keeps handing you a slice every year until nothing of its value is left, and this is the piece mechanics let slip once a purchase is a couple of returns old. The engine crane you bought three years back still has value left to draw this year, so it belongs on this return too, not only the one where you paid. Across a kit built over a career, those overlooked slices add up to real money left sitting with the ATO. Each year's amount comes from what value the tool has left and how long its effective life runs, and the ATO's own depreciation calculator works it out for you.
The tool truck and its interest
Hardly any mechanic pays cash for a full kit. It goes on a tool-truck account or a finance deal, a fortnightly hit against the roll cab and the sets stacked inside it. That finance isn't only a payment method: part of it is a deduction in its own right.
Diagnostics, repairs, insurance, the cabinet
The $300 line is about buying a tool. It has nothing to say about the gear you diagnose with, the cost of keeping a tool alive, insuring it, or the box it sits in, and each of those is a deduction on its own.
The write-off that isn't yours
Every run-of-the-mill trade tax article pushes the instant asset write-off hard, and for a wage-paid mechanic it's a trap. It isn't your rule, and dropping it on a wage return is a quick way to have one picked apart.
The instant asset write-off, that twenty-thousand-dollar number quoted everywhere, lets a qualifying small business deduct assets outright up to a ceiling the ATO fixes. It's turnover-tested and it belongs to businesses on an ABN, not to employees. On wages, your line is the one on this page and nothing more: $300 or less immediate, over $300 decline in value. The write-off cap in those articles never touches your return. If you honestly can't tell whether you're an employee or working on an ABN, that reshapes what deductible means across the board, and the employee-versus-owner chapter is where to sort it.
The tool allowance catch
A tool allowance on the payslip looks like it wraps up your tool claim. It does the opposite: the allowance is income in its own right, and your deduction is a separate figure settled on its own footing.
The schedule behind a tool claim
Every tool above rests on the invoice behind it, and a kit built across years is exactly where the paper trail springs a leak. A depreciation schedule is what runs a mechanic's tool claim, and once you keep one the return more or less fills itself in.
- An invoice for every tool, showing date, supplier, item and cost, held for five years.
- A depreciation schedule for anything over $300: date first used, cost, effective life and written-down value, carried into each year.
- Tool-finance statements that show the interest inside each payment.
- Your tool-insurance policy, plus a note of the work-use split on anything you also use at home.
The bottom line
Sort each tool by cost. At $300 or under it comes off entirely this year, above $300 it spreads over its life, and a kit bought as a set is weighed as one no matter how cheap each piece looks. Keep drawing on last year's tools until they're written off, claim the interest on the truck plan, fold in the diagnostics, the repairs, the specific insurance and the cabinet, and hand the instant asset write-off back to the businesses it was designed for. Report a tool allowance as income and set your genuine spend against it. Do all that with a depreciation schedule beneath it, and the trade's biggest cost lands on your return where it should.
Work out what your kit, finance interest and insurance are worth against your income.
General information only, not tax advice. Check the ATO or a registered tax agent for your situation.