US Treasury proposes global minimum corporate tax of at least 15% during OECD negotiations

The rate is significantly below the Treasury Department's proposed 21 per cent minimum for US multinational firms. PHOTO: AFP

WASHINGTON (REUTERS) - The United States Treasury Department on Thursday (May 20) offered to accept a global minimum corporate tax of at least 15 per cent during international negotiations, a rate significantly below its proposed 21 per cent minimum for US multinational firms.

The department said the proposal was made during an Organisation for Economic Cooperation and Development (OECD) tax steering group meeting on base erosion and profit shifting.

The group is aiming to reach broad agreement this summer to rework rules for taxing multinational corporations and big technology companies, such as Alphabet and Facebook.

"Treasury proposed to the steering group that the global minimum tax rate should be at least 15 per cent," the department said in a statement.

"Treasury underscored that 15 per cent is a floor and that discussions should continue to be ambitious and push that rate higher."

US Treasury Secretary Janet Yellen first proposed a 21 per cent US corporate minimum tax last month as part of President Joe Biden's US$2.2 trillion (S$2.9 trillion) infrastructure spending proposal, which would be financed largely by increasing the US corporate tax rate to 28 per cent.

The Trump administration and congressional Republicans in 2017 cut the corporate tax rate to 21 per cent from 35 per cent. At the same time, the Treasury Department launched a US minimum tax, of 10.5 per cent, known as the Global Intangible Low-Taxed Income tax (GILTI) to capture revenue shifted by companies to tax-haven countries.

The Biden administration's proposed 21 per cent GILTI rate was widely viewed as a starting point for renewed OECD talks on a global minimum tax.

While France and Germany backed the 21 per cent, other countries have pushed for a lower rate, as previous OECD discussions on the subject had centered around 12.5 per cent, the same rate charged by Ireland.

French Finance Minister Bruno Le Maire said that the latest US proposal "could be a good compromise" while his German counterpart Olaf Scholz welcomed it as "big progress".

They both insisted, however, that talks should be wrapped up as planned by a July meeting of G20 finance ministers, amid suggestions from the OECD that it could take until October to finalise a deal.

A US Treasury official said the Biden administration will continue to advocate for the highest rate possible above 15 per cent, adding that the offer does not alter the 21 per cent proposed US minimum tax.

The official said that even at 15 per cent, the spread between US and global minimum rates would narrow considerably, because there currently is no global minimum tax.

"The 15 per cent rate is certainly more realistic given where other countries are," said Ms Manal Corwin, head of KPMG's Washington national tax practice and a former Treasury official.

"Importantly, this is signalling that the US is willing to accept a global minimum tax that is well below the rate they are proposing for GILTI," she added.

"I suspect it was important for reaching agreement at the OECD that the US is willing to agree to something well below 21 per cent."

The Treasury Department said officials from its Office of Tax Policy were "heartened by the positive reception to its proposals and the unprecedented progress being made towards establishing a global minimum tax".

It proposed the global minimum tax as a way to minimise the impact of a higher US tax rate on the competitiveness of American companies and deter them from shifting operations or profits to lower-tax jurisdictions.

Dr Yellen had said she wanted to stop a "30-year race to the bottom on corporate tax rates" at a time when governments have spent trillions of dollars on Covid-19 relief measures.

The Treasury Department said it made clear at the OECD meeting that a global minimum tax rate "would ensure the global economy thrives based on a more level playing field".

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