The FIFO Tax Deductions Most Likely to Trigger an ATO Audit This Year

Tax time rolls around every year and every year the same crew of blokes and blokes' mates reckon they know exactly what they can claim because "that's what my offsider claimed last year." Problem is, the ATO has been getting a lot smarter about FIFO returns, and a lot of the claims that used to slide through without a second look are now the exact ones getting flagged for review. If you're on a swing right now reading this on your phone in the donga, this is the stuff worth knowing before you lodge, not after you get a letter asking you to explain yourself.

Why FIFO workers get extra attention

The ATO isn't picking on FIFO workers for fun. It's because the industry has a specific pattern: high incomes, big work-related deduction claims, and a workforce that moves around a lot between employers, sites and rosters. That combination sits right in the sweet spot for their data-matching systems.

Here's the bit most people don't think about. The ATO cross-references your tax return against information it already has from other sources: your employer's payment summary, your award or enterprise agreement, industry benchmarks for your occupation, and in some cases your roster pattern reported by the mine site or contractor. If you claim $4,200 in laundry expenses but your award says the company supplies and launders your PPE, that's a mismatch a computer can pick up in about half a second. You don't need a human auditor sitting there suspicious of you. The system does the first pass automatically, and if your numbers sit outside the normal range for someone in your role, your return gets pulled aside for a closer look.

None of this means you shouldn't claim what you're entitled to. It means you need to claim it properly, with the right reasoning and the right paperwork, so that if it does get queried you can answer in about thirty seconds instead of spending your R&R on the phone to the tax office.

Travel claims: the biggest red flag on the list

This is the one that catches out more FIFO workers than anything else. The general rule the ATO applies is straightforward even if it feels unfair: travel between your home and your regular workplace is private travel, not work travel, even if your "regular workplace" happens to be a mine site 1,400 kilometres away and you fly there on a chartered plane.

Where people get into strife is claiming the cost of getting to and from the departure point, like the drive from home to the airport, parking at the airport for the length of the swing, or an Uber to a hotel the night before an early muster. In most cases none of that is deductible, because it's still classified as travel to your regular place of work, not travel undertaken in the course of your job.

There are exceptions, and they matter. If your employer requires you to travel between two different work sites in the same swing, that leg can be deductible. If you're required to attend a training site, a second operation, or head office for inductions as a separate trip outside your normal roster travel, that's different too. The distinction the ATO is looking for is whether the travel is genuinely part of performing your duties, or whether it's just you getting to work like everyone else who drives to an office.

The practical fix here is simple: don't guess. If your company already pays a travel allowance or flies you point to point, don't double dip by also claiming your own fuel, parking or flights on top unless you've got a very clear, separate reason tied to actual duties. Keep a log if you do have genuine multi-site travel, with dates, sites and purpose noted at the time, not reconstructed from memory in July.

Laundry claims that don't match your award

Laundry is the classic "safe" deduction that isn't safe anymore. The ATO allows a reasonable claim for washing, drying and ironing work clothing without needing receipts, up to a threshold, but "reasonable" is doing a lot of work in that sentence and the ATO's definition of reasonable is a lot narrower than most people assume.

Two things matter here. First, the clothing has to be genuinely occupation-specific or protective, like flame-retardant shirts, steel caps, hi-vis, or branded uniforms with a logo, not just "clothes I wear to work" like a plain black t-shirt and jeans. Second, and this is the part that trips people up, if your employer provides laundering as part of camp services, which a lot of sites do through the wet mess or a camp laundry service, you can't then also claim your own laundry costs for the same items. That's claiming for something you didn't actually pay for.

The ATO's data matching picks this up by comparing your claim against known camp conditions and enterprise agreements for your specific site and employer. If your EA says laundry is provided and you've claimed $600 for washing PPE, that's an obvious flag. If you genuinely do your own washing at camp or at home between swings, that's fine to claim, but keep a rough diary of loads and detergent costs so you can back it up if asked, rather than just claiming the maximum "safe harbour" amount out of habit.

Phone and internet without a scrap of evidence

This one's everywhere and it's an easy target. Claiming a flat $300 or $400 for phone and internet use with zero record of how that number was worked out is one of the most common triggers going around this year. The ATO doesn't require you to itemise every call, but it does expect you to have done some kind of reasonable calculation, like a four-week representative diary showing the split between work and personal use, applied across the year.

If you're FIFO and you use your phone to check rosters, communicate with your supervisor, log timesheets through an app, or coordinate with your crew before a swing, that's legitimate work use and it's claimable. What's not going to hold up is a round number with no method behind it, especially if it's identical to the claim your mate down the camp lodged, because they've both just used the same "safe" figure they heard about from someone else.

Work out the actual percentage. If you use your phone two hours a day and maybe twenty minutes of that is genuinely work-related, that's roughly 15 to 20 percent of your monthly bill, not a flat figure pulled out of the air. Apply that percentage, keep your phone bill, and you've got a claim that survives scrutiny.

What the ATO is actually checking your claims against

It helps to understand the mechanics here rather than just being told "don't do it." The ATO's data-matching program pulls in information from a few different places:

• Your employer's single touch payroll data, which shows your income, any allowances paid, and often flags whether travel, meals or accommodation were provided as part of your employment.
• Industry benchmarks for your specific occupation code, which set a rough expected range for deductions. Claims sitting well above the average for your job and income bracket get looked at more closely.
• Enterprise agreements and awards specific to mining, resources and construction, which the ATO has increasingly used to check whether claimed expenses (laundry, travel, meals) were actually already provided or reimbursed by the employer.
• Prior year returns, so a sudden jump in your deductions from one year to the next without a clear change in circumstances (new role, new site, new roster) will stand out.

None of this is secret or unfair. It's just automated comparison at scale. The takeaway is that your deductions need to make sense in the context of your actual employment conditions, not in the context of what maximises your refund.

The safest deduction is one you can explain in a single sentence to someone who's never worked a day on site, backed by a receipt or a log you kept at the time.

How to actually get it right this year

Start by pulling your enterprise agreement or award and reading the section on allowances and provided items. Know exactly what your employer already covers, because anything covered by them can't be claimed again by you. Then, for anything you genuinely pay for yourself, keep the receipt or a contemporaneous note, not a reconstruction done in a panic in June.

If you're claiming travel, be specific about which legs are work-related and which are just getting to your regular job. If you're claiming laundry, separate what's genuinely occupation-specific from what's just clothes. If you're claiming phone and internet, do the maths on actual usage rather than reaching for a round number.

None of this is about claiming less than you're owed. Plenty of FIFO workers are still under-claiming legitimate expenses like tools, licences, medical checks required for the job, and genuine multi-site travel. The point is accuracy, not caution for its own sake. A correctly documented claim of $2,800 will sail through review a lot faster than a vague, rounded claim of $4,500 that looks like a guess, because to the ATO's systems, it probably is one.

If your return does get flagged, it's usually not the end of the world. You'll be asked to substantiate specific items, and if you've kept decent records you simply provide them and move on. Where people get into real trouble is when they can't produce anything beyond "that's what everyone claims," because at that point the ATO isn't just disallowing the deduction, it's asking whether the rest of your return can be trusted either.

Get a tax agent who actually understands FIFO rosters and site conditions if your situation is at all complicated, particularly if you've moved between sites, changed rosters, or worked for labour hire and direct-hire employers in the same year. The fee is deductible, and it's cheap insurance against a much longer conversation with the ATO down the track.