BHP Strike and Your Tax Return: What Time Off the Roster Does to This Year's Refund

If you've spent any part of this year standing on a picket line instead of swinging through the gate, you already know your bank balance looks different. What you might not have worked out yet is how it changes the shape of your tax return come July. A strike doesn't just cut your pay for a few weeks, it shifts your whole income profile for the year, and that has knock-on effects for deductions, offsets and PAYG withholding that most site workers never see coming until they're staring at a refund number that doesn't match last year's.

This isn't a political piece about the BHP dispute. It's a numbers piece. Whether you've lost two weeks, six weeks or more off the roster, here's what actually happens to your tax position, with real dollar figures so you can see it clearly instead of guessing.

Why a lower income year changes more than just your pay

Most FIFO workers are used to a fairly predictable pattern: big gross income, a chunk of it taxed at the higher marginal rates, PAYG withheld at a rate calculated for a full year of that income, and deductions that claw back a decent slice at tax time. Strike action breaks that pattern in the middle of the financial year, which means the maths behind your withholding and your deductions no longer lines up the way it usually does.

Employers calculate PAYG withholding based on what you'd earn if every pay period looked like the one they're processing. If you're normally on $180,000 a year and you have eight weeks of strike-affected pay with reduced or zero income, your employer's payroll system was still withholding tax at a rate set for a $180,000 earner during the weeks you were working. That means by the end of the year, you may have had too much withheld relative to your actual, lower total income. That's not a bad thing. It usually means a bigger refund than you'd expect, not a smaller one.

But it's not automatic, and it depends heavily on how the missing weeks were treated: unpaid leave, strike pay from the union, or nothing at all.

The two scenarios that matter

There are basically two situations, and they lead to very different outcomes.

Scenario one: unpaid weeks with no replacement income

Say you normally earn $170,000 a year on a standard FIFO package. You lost six weeks off the roster with zero income for that period, no strike pay, nothing coming in. Your annual income drops to roughly $150,600 (six weeks at an average weekly rate of about $3,230 based on that annual figure).

Here's where it gets interesting. Your employer withheld PAYG tax during the weeks you did work based on the assumption you'd earn $170,000 for the year. Because your actual income came in nearly $20,000 lower, you were almost certainly overtaxed throughout the year relative to your real tax bracket. At $170,000 you're deep into the 37% bracket for a chunk of your income. At $150,600, less of your income sits in that bracket. The tax office reconciles this at return time, and the practical effect is usually a noticeably larger refund than a normal year, sometimes an extra $2,000 to $4,000 depending on exactly where the brackets fall for your income level.

That sounds like a silver lining, and in cash flow terms it is. But don't confuse "bigger refund" with "better off." You're still down the six weeks of actual take-home pay, which for most site roles is $15,000 to $19,000 gross. The tax refund bump might claw back $2,000 to $4,000 of that. It softens the blow. It doesn't undo it.

Scenario two: strike pay or partial income replacement

If your union paid strike pay, or you picked up some other income during the stoppage, the picture changes again. Strike pay from a union is generally not taxed the same way as employment income, and depending on the source and structure, it may or may not need to be declared. This is genuinely one of those areas where the treatment varies and getting it wrong either way (declaring something that isn't assessable, or failing to declare something that is) causes problems later. If you received strike pay this year, get specific advice on how your union structured it before you lodge, because guessing here isn't worth the risk of an amendment or an audit flag down the track.

What happens to your deductions in a lower income year

This is the part most people miss entirely. Deductions don't have a fixed dollar value, they're worth whatever percentage your marginal tax rate is. In a normal high-income year, a $3,000 deduction claimed at the 37% bracket is worth $1,110 back in your pocket. Drop into a lower income year because of strike weeks, and that same $3,000 deduction might only be sitting at the 32.5% bracket (or lower, depending on your total taxable income), worth $975 instead. Still solid. But it's less than you'd have gotten in a normal year, and if you were counting on your usual deduction strategy to produce a familiar refund number, you'll notice the gap.

Practically, this means the following common FIFO deductions are still worth claiming, but the return you see from them will be smaller this year if your income has dropped meaningfully:

• Fly-in fly-out travel costs not reimbursed by your employer, including private vehicle use getting to and from the airport or muster point
• Self-education and licence renewals directly connected to your current role (tickets, HR tickets, first aid, working at heights)
• Protective clothing, boots and PPE not supplied by the company
• Union fees, including any portion that isn't strike-related levy (check with your union on how this is itemised)
• Tools and equipment you've bought for site use that weren't reimbursed
• Phone and internet costs apportioned for work use, particularly relevant if you were fielding roster updates or union communications during the dispute

Keep every receipt regardless of the strike. The ATO doesn't care why your income was lower this year, it still wants substantiation for every claim exactly as it would in a normal year.

A concrete side-by-side

To make this real, here's a simplified comparison for someone on a base FIFO package of $160,000 a year, working an 8-and-6 roster at a site like the ones you'd find across any of the operations on the Australian mine map when you're weighing up rosters and pay bands between sites.

Normal year: $160,000 gross income, PAYG withheld across the year at rates matching that income, $4,500 in work-related deductions claimed, refund of roughly $1,800 after reconciliation. Strike-affected year: six weeks unpaid, gross income drops to roughly $142,000, PAYG was still withheld at the higher $160,000 rate during working weeks, same $4,500 in deductions claimed but now worth slightly less per dollar due to the lower bracket, net effect is a refund of roughly $3,600 to $4,200 once the overwithholding is reconciled against actual liability.

So yes, the refund goes up. But remember the $17,000 to $18,000 gross you didn't get paid during those six weeks dwarfs the extra $2,000 or so sitting in that bigger refund. This is the number that matters when you're budgeting for R&R, mortgage repayments or anything else that assumed a full roster's income.

What to actually do before you lodge

A few practical steps make a real difference this year specifically:

• Pull your income statement from myGov or through your employer and check the actual gross figure against what you expected for a full roster year. Don't assume, check the number.
• If you received any strike pay or union hardship payments, get a written statement from your union on how that payment should be treated for tax purposes before you lodge.
• Don't skip deductions just because the dollar value feels smaller this year. A $975 return on a claim is still $975 you're leaving on the table if you don't claim it.
• If your income dropped enough to move you into a different bracket, check whether you're now eligible for offsets you weren't getting before, particularly the low income tax offset, which phases in as taxable income falls below certain thresholds.
• If you're unsure whether unpaid strike weeks affect anything else, like HECS repayment thresholds or child support assessments, flag it with your accountant specifically, because those calculations use your total taxable income for the year and a strike-affected year can genuinely shift you across a threshold you'd normally sit above.

A strike year isn't a normal year, and trying to force this year's return into last year's pattern is how people either miss a bigger refund they're entitled to, or lodge something that doesn't match their actual payment records. Take the extra twenty minutes to check the real numbers against what you expected. It's worth more than the guesswork.