BHP Strike and Your HECS Debt: How Missing Pay Could Change What You Owe This Tax Time

BHP's enterprise agreement dispute has put a chunk of the workforce on reduced pay for weeks at a time, and depending on how your site's award action shakes out, that can mean thousands of dollars less landing in your account before June 30. Most of the coverage so far has been about the obvious stuff: rent, the mortgage, car repayments, keeping the lights on at home while you're not clocking overtime. Fair enough, that's the immediate pain.

But there's a second thing sitting quietly in the background that nobody's talking about, and it's going to show up the moment you lodge your tax return. If you've got a HECS or HELP debt, a lower income year from strike action doesn't just hurt your bank balance now. It changes what the ATO expects you to repay this financial year, and it does absolutely nothing to slow down what your debt grows by in the meantime. Those two things move independently of each other, and if you don't understand how, tax time is going to feel like a trap.

How Your HECS Repayment Actually Gets Calculated

Your employer withholds extra tax from every pay based on an estimate of your annual income, using a HECS repayment table the ATO publishes. That withheld amount isn't the real number though. The real number gets worked out when you lodge your return, based on your actual repayment income for the year, which includes your taxable income, any reportable fringe benefits, reportable super contributions, total net investment losses and a few other bits.

Here's the part that matters for anyone who's had weeks pulled off the roster: the compulsory repayment is calculated as a percentage of your total income for the whole financial year, not per pay cycle. So if you've had eight weeks of missed swings on top of your normal roster, your annual repayment income drops, and that can shift you down a bracket, sometimes down several, sometimes below the threshold entirely.

The Actual Thresholds and Rates for 2024-25

These are the repayment income bands the ATO uses for the 2024-25 financial year. If your repayment income sits in a bracket, that percentage is what gets applied to your entire repayment income, not just the portion over the threshold:

• Under $54,435: nil, no compulsory repayment
• $54,435 to $62,850: 1.0%
• $62,851 to $66,620: 2.0%
• $66,621 to $70,618: 2.5%
• $70,619 to $74,855: 3.0%
• $74,856 to $79,346: 3.5%
• $79,347 to $84,107: 4.0%
• $84,108 to $89,154: 4.5%
• $89,155 to $94,503: 5.0%
• $94,504 to $100,174: 5.5%
• $100,175 to $106,185: 6.0%
• $106,186 to $112,556: 6.5%
• $112,557 to $119,309: 7.0%
• $119,310 to $126,467: 7.5%
• $126,468 to $134,056: 8.0%
• $134,057 to $142,100: 8.5%
• $142,101 to $150,626: 9.0%
• $150,627 to $159,663: 9.5%
• $159,664 to $169,235: 10.0%

Above that, the top rate is 10 percent, which most trades and operators on decent site rates will already be sitting at or near in a normal year.

What This Looks Like With Real Numbers

Say you're an operator on $128,000 a year in a normal year, which puts you at 8.0 percent, meaning a compulsory repayment of $10,240 (that number, plus the small percentage above, gets applied to the full repayment income, that's how the brackets work). Now say strike action and stood-down weeks knock $18,000 off your taxable income for the year, bringing you down to $110,000. You've dropped into the 6.5 percent bracket. Your compulsory repayment falls to $7,150. That's $3,090 less coming out of your return this year purely because your income dropped, separate from the fact you've already lost $18,000 in wages. It doesn't undo the wage loss, but it does mean the tax office isn't taking as big a bite either.

Now flip it for someone closer to the middle brackets. A trades assistant normally on $76,000 sits in the 3.5 percent bracket, repayment of $2,660. If strike-affected weeks bring that down to $58,000, they drop to the 1.0 percent bracket, just $580. Some workers who normally sit just above the threshold might find themselves dropping below $54,435 entirely, meaning no compulsory repayment at all for the year.

This isn't a reason to be relaxed about missed pay. It's just the one part of the picture where a lower income year actually works in your favour at tax time, and it's worth knowing so you're not blindsided either way, whether that means a smaller refund hit than you expected or realising you overpaid through the year and there's money coming back.

The Debt Itself Doesn't Care About Any of This

Here's where people get caught out. The compulsory repayment calculation is about your income. Indexation is about the debt balance, and it runs on its own clock regardless of what you earned, whether you were on strike, stood down, injured, or on the beach for six months.

HECS and HELP debts are indexed once a year, applied on 1 June, based on movement in the Consumer Price Index (from the 2023 and 2024 indexation years onward, the rule was changed so it's whichever is lower between CPI and the Wage Price Index, backdated to reduce some of the damage from the 7.1 percent hit in 2023). Indexation for 2024 came in at 4.7 percent. Whatever the figure lands at this year, it applies to your outstanding balance on 1 June, before any compulsory repayment from your tax return gets subtracted.

That sequencing matters. If you've got a $42,000 HECS balance and indexation lands at, say, 3.5 percent this cycle, that's roughly $1,470 added to your debt on 1 June, calculated on the balance as it stands that day. Your compulsory repayment from your tax return doesn't get applied until after that, when the ATO processes your assessment. So a strike-reduced income doesn't shrink the debt faster. If anything, a smaller compulsory repayment this year means slightly more balance sitting there to cop next year's indexation too.

A lower income year can shrink what you owe this tax time, but it does nothing to slow down what you owe overall. Those are two separate systems ticking over independently, and only one of them cares that you've had a rough run of swings.

What Actually Changes on Your Tax Return

When you lodge, here's what plays out in practice. Your employer will have withheld PAYG tax through the year based on the income estimate at the time, which usually assumes a full roster of normal pay. If your actual income came in lower because of strike-affected weeks, two things happen together: your income tax liability drops, and your HECS compulsory repayment (calculated on that lower repayment income) also drops. Both of those reductions can mean the ATO owes you money back, sometimes a genuinely useful refund if you were withheld at a higher rate than your actual year turned out to require.

Worth flagging: if you're the kind of worker who does overtime, allowances, camp meal deductions, or claims travel between swings, none of that changes because of the strike. Keep your usual records. A messier income year is exactly the kind of year the ATO occasionally has a closer look at, so don't get sloppy with logbooks or receipts just because the pay's been irregular.

What You Can Actually Do About It

A few practical moves worth thinking about while this plays out:

• Get an updated income estimate. If you know roughly how many weeks you've lost to strike action or stand-downs, do a rough back-of-envelope calculation using the bracket table above so you're not guessing at tax time.
• Don't assume a lower repayment this year means you should stop budgeting for the debt. The balance keeps growing through indexation regardless, so treat any tax time relief as a cushion for the wage loss, not a reason to ignore the debt long-term.
• If you've got savings and you're weighing up a voluntary extra repayment before 1 June to reduce what gets indexed, do the maths properly first. Voluntary repayments reduce your balance before indexation applies, so timing one just before 1 June can save you real money if you've got the cash spare and no higher-priority debt (like a car loan at a worse rate) to clear first.
• If the dispute drags on and you're weighing up whether to ride it out or look at options elsewhere, most FIFO workers already know that swapping sites isn't a small decision. Rosters, camp standards and travel arrangements vary enormously between operations, so if you do end up exploring a move, do the homework on what a new site and roster actually looks like before signing on.
• Keep an eye on your myGov HELP balance through the year, not just at tax time. It's a five minute check and it tells you exactly where you stand before indexation lands.

None of this fixes the actual problem, which is missed pay from a dispute that's out of your hands. But knowing which parts of your financial picture move with your income and which parts don't means you're not caught flat-footed when your tax return lands, whether that's a pleasant surprise on the repayment side or a reminder that the debt itself hasn't slowed down at all.