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Tax News & Views International Weekly: Retreat on Carbon Tax?

By Alex M. Parker
October 22, 2025
International flags

Key Takeaways

  • The U.N. has delayed a vote on a potential carbon tax system for global shipping.
  • The U.S. had strongly opposed the plan, threatening retaliation against countries which supported it.
  • Despite the setback, the global push to reduce carbon emissions through new taxes or fines is likely to continue.
  • U.N. soon to complete digital tax rules.
  • Businesses challenge constitutionality of Trump tariffs.

In another apparent foreign policy victory for the Trump administration, the United Nations International Marine Organization delayed a vote last week on a proposed carbon emissions taxation system for global shipping—strongly opposed by the U.S. and other oil-rich nations—for at least the next 12 months.

The system, called the Net-Zero Framework, would set limits for greenhouse gas emissions for cargo ships, and those above the limit would be required to purchase “remedial units” which could also be saved for the future or transferred to other ships. The trading system bears some resemblance to the European Union’s emissions trading system, which has been in place since 2005. The fines would be administered under the 1973 International Convention for the Prevention of Pollution from Ships, which the U.S. and 158 other countries have signed. Funds raised through the penalties would be used to reward shipping companies with vessels that stay under the limit, although the details of this have yet to be drawn out.

Aside from leaving the discussions, the U.S. has threatened to retaliate against countries supporting the proposal—including higher port fees, blocking vessels entirely, increased visa restrictions and even “sanctions” against government officials who’ve pushed the plan. 

The shipping industry comprises a significant portion of overall greenhouse gas emissions—according to some estimates, as much as 3%. But the proposal is probably even more important as a precedent, as potentially the first major global carbon tax put into place. (Although many countries have enacted carbon taxes at the national level.)

But while this vote could be seen as a victory for carbon tax opponents, it’s not likely to reverse the overall global interest in enacting new taxes on carbon emissions. The EU is moving ahead on its carbon border adjustment mechanism, a tariff on selected products in carbon-intensive industries, based on the estimated emissions embedded into the import. The CBAM is set to take full effect next year, despite threats from the Trump administration to enact retaliatory tariffs.

And while the U.N.’s proposed carbon tax on shipping has been delayed, it hasn’t been completely rescinded—and the global picture may change within the coming months.

 

Noteworthy Items This Week 

How Trump Pressured Nations to Delay a Carbon Tax on Shipping – Jennifer A. Dlouhy, Jack Wittels and Eric Martin, Bloomberg News ($):
On Friday, nations at a meeting of the UN’s International Maritime Organization voted to delay by one year a decision on the landmark measure that would force large vessels to curb emissions or potentially incur fees of $380 per ton.

The outcome was in part the culmination of a months-long campaign by US officials — including diplomats and cabinet members as well as the president himself — to fight the fee they decried as an untenable global carbon tax.

“President Trump saved America from the outrageous climate scam that was killing our country, and he has long warned others to abandon this destructive agenda before it is too late,” White House spokeswoman Taylor Rogers said by email. “Stopping this disastrous vote is a massive win for the American people and countries around the world that cannot afford to bend the knee to bogus climate demands any longer.”

 

French Digital Tax Ruling Puts Spotlight On Trade Tensions – Natalie Olivo, Law360 Tax Authority ($):

Although the U.S. government's global tariffs are not directly related to DSTs, some countries — including Canada and India — have agreed to scrap digital measures as part of ongoing trade negotiations. Accordingly, even though a French court last month validated the country's DST under reasoning that has parallels to EU law, the ruling may do little to move the needle in tariff talks with President Donald Trump, who has long criticized foreign digital measures.

The legality of digital levies, whether in France or elsewhere in Europe, is of little consequence to Trump, who has been after DSTs since his first administration, according to Daniel Cannistra, a partner in Crowell & Moring LLP's Washington, D.C., office.

"Europe doesn't have much to offer Trump because their tariffs are already pretty low," he said. "So this is going to become one of those things that they could offer."

 

UN Panel Aims to Set Model Rules for Taxing Virtual Business – James Munson, Bloomberg Tax ($):

A strong majority of the UN’s 25-member committee of tax experts favored coming up with more alternatives to traditional nexus, or rules for establishing a right to tax global businesses.

The committee, meeting this week in Geneva to develop its agenda for the next four years, will work on the new rules by updating sections of the UN’s model tax convention. Developing countries use the model convention as a template to draft legislation and negotiate tax treaties.

A new subcommittee will focus on updates to the convention, including the new nexus rules, and act as a coordinating body to delegate topics best left to other subcommittees, said committee Chair Mathew Gbonjubola.

 

Trump’s Tariffs Are Unconstitutional, Challengers Tell SCOTUS – Caitlin Mullaney, Tax Notes ($):

“If IEEPA were interpreted to convey such boundless authority to tax the American people, it would constitute the most plainly unconstitutional delegation of legislative power in a century,” V.O.S. Selections Inc. wrote in its October 20 response brief in V.O.S. Selections Inc. v. United States.

In its October 20 response brief in Learning Resources Inc. v. Trump, Learning Resources Inc. contended that IEEPA’S authorization for the president to regulate importation doesn't give Trump the authority to impose the tariffs that he has used to “rewrite U.S. trade laws and reshape the national economy.”

 

Rationalizing the Post-OBBBA International Tax Rules – Mindy Herzfeld, Tax Notes ($):
The first in a series, this article considers additional changes to the international tax rules that could rationalize pre-2017 law with the TCJA, and suggests modifications needed to clean up the deadwood of a pre-GILTI system. Eight years after a new regime based on (an almost) worldwide inclusion of CFC earnings was enacted, the law is settled enough to highlight areas where pre-TCJA rules no longer make sense and to propose additional improvements to TCJA provisions. Working with an administration focused on reducing undue regulatory burdens, Congress could take this opportunity to go beyond paying lip service to tax simplification and reduce the complexity of the U.S. international tax rules that impose significant compliance costs on U.S. taxpayers.

 

Public Domain Superhero of the Week

Every week, a new character from the Golden Age of Comics, who’s fallen out of use.

This week’s entry: The Black Bull

Black Bull

Debut Year: 1948

Debut Publication: Prize Comics Western #71

Origin Story: The Black Bull is the alter-ego of a wealthy cattle baron's son, who secretly fights scoundrels in the tradition of Zorro, the Lone Ranger, and other masked heroes of the frontier.

Superpowers: No superpowers, but he's a great shot with a loyal horse.

 

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About the Author(s)

Alex Parker

Alex Parker

Tax Legislative Affairs Director
Alex provides on-the-ground coverage and analysis of tax developments in our nation's capital, ensuring that Eide Bailly clients are well-informed about legal or regulatory changes that could affect them. He also closely follows the fast-changing and complex international tax sphere, including new projects at the United Nations, the G-20, and the Organization for Economic Cooperation and Development.

Any opinions expressed or implied are those of the author and not necessarily those of Eide Bailly. Opinions found in linked items are those of the authors of the linked item, not of your bloggers or of Eide Bailly. “$” means link may be behind a paywall. Items here do not constitute tax advice.