The Australian Labor Get together simply gained an election victory for the ages. Now, it could be pressured to stroll again one of many key achievements of its first time period.
Right here’s why: United States President Donald Trump is about to declare an revenue tax battle on a lot of the world – and we Australians usually are not on the identical facet.
Over within the US, the “One Big Beautiful Bill act” – a tax and spending bundle price trillions of {dollars} – has been passed by the Home of Representatives. It’s now earlier than the Senate for consideration.
Inside it lies a brand new and extremely controversial provision: Section 899. This will increase numerous US tax charges payable by taxpayers from any nation the US claims is sustaining an “unfair international tax” by 5 share factors annually, as much as an extra 20% loading.
Having been an integral a part of a global effort to create a world 15% minimal tax, Australia now finds itself within the firing line of Trump’s “revenge tax” warfare – and it’s a combat we’re unlikely to win.
A worldwide minimal tax charge
The origins of the looming revenue tax battle started in 2013, when the Organisation for Financial Co-operation and Improvement (OECD) launched its plan to stamp out “base erosion and revenue shifting”.
This refers to a spread of methods typically utilized by multinational corporations to minimise the tax they pay, exploiting variations and gaps within the tax guidelines of various international locations.
The OECD’s first try and sort out the issue was a group of disparate measures directed not solely at company tax avoidance, but in addition controlling tax poaching by nationwide governments and “sweetheart deals” negotiated by tax officers.
Beneath each Labor and the Coalition, Australia was initially an enthusiastic backer of those makes an attempt.
Nonetheless, the undertaking was not a widespread success. Many international locations endorsed the ultimate reviews however, in contrast to Australia, few international locations acted on them.
After the failure of this primary undertaking, the OECD tried once more in 2019. This advanced to embody two “pillars” to alter the worldwide tax guidelines.
Pillar one would give extra tax to international locations the place an organization’s prospects are situated. Pillar two is a minimal tax of 15% on (a model of) the accounting earnings of the biggest multinationals earned in every nation the place the multinational operates.
Labor picked up this undertaking for the 2022 election, promising to assist each pillars – and so they honoured that promise.
The Washington Post/Getty
Combined success
Around the globe, the 2 pillar undertaking had blended success. Pillar one was dead-on-arrival: most international locations did nothing. However Australia and a number of other different international locations, principally in Europe, carried out pillar two – the worldwide minimal tax.
The OECD has all the time maintained the bottom erosion and revenue shifting (BEPS) undertaking was a coalition of the prepared, meant to rebalance the way in which revenue tax is allotted between producer and shopper international locations, and rid the world of tax havens.
Within the US, Republicans did not share that view. For them, BEPS was merely one other try by international international locations to get extra tax from US corporations.
This Republican dissatisfaction with the OECD is now on full show. On the primary day of his second time period, Trump issued an executive order, formally repudiating any OECD commitments the Biden administration may need given.
He additionally directed his officers to report on choices for retaliatory measures the US may take towards any international international locations with revenue tax guidelines which might be “extraterritorial” or “disproportionately have an effect on American corporations”.
Why Australia is so uncovered
Australia may discover itself within the firing line of Trump’s tax warfare on many fronts. And the US doesn’t lack firepower. Part 899 provides to quite a lot of retaliatory tax provisions the US already had at its disposal.
The elevated tax charges would have an effect on Australian tremendous funds and different buyers incomes dividends, lease, curiosity, royalties and different revenue from US corporations.
Australian tremendous funds particularly are closely invested in US markets, which have outperformed native shares lately.
It might additionally have an effect on Australian managed funds proudly owning land and infrastructure property within the US, in addition to Australian entities resembling banks that stick with it enterprise within the US.
And there are different measures that will expose US subsidiaries of Australian corporations to US larger tax.
The invoice would even take away the doctrine of sovereign immunity for the governments of “offending” international locations. Sovereign immunity refers to a tax exemption on returns that often applies to governments. This implies the Australian authorities itself may must pay tax to the US.
There are concerns on Wall Street this can dampen demand for US authorities bonds from international governments, that are large patrons of US Treasuries. The argument might sway some within the Senate – however what number of stays to be seen.

Francois Mori/AP
What Australia might have to do subsequent
We could also be incredulous that anybody would take into account our tax system combative, however enacting the OECD pillar two was all the time identified to be dangerous.
There are different, homegrown Australian tax measures which have drawn American ire.
In 2015, Australia enacted an revenue tax measure (generally referred to as the “Google tax”) particularly directed at US tech corporations. In 2017, we adopted this up with a diverted profits tax. Trump’s invoice particularly targets each measures.
Tying ourselves to the OECD’s world minimal tax undertaking may need appeared like a good suggestion in 2019. In 2025, it appears to be like decidedly unappealing, and never simply due to Trump.
First, there may be not really any critical income in pillar two for Australia. Treasury’s revenue estimate totalled solely $360 million after 4 years, simply barely greater than a rounding error within the federal funds.
Second, we’re more and more alone and susceptible on this battle. It would really feel emotionally satisfying to face as much as the US. If there was a sizeable coalition alongside us, there is perhaps some level.
If Trump’s One Huge Lovely Invoice act does cross by the US Senate, the Australian authorities and enterprise will probably be left uncovered to a lot larger prices.
Since abandoning the US market isn’t actually an choice, it is perhaps time to give up quietly and gracefully – by reversing, on the very least, the contentious bits of pillar two.