Unlock stock picks and a broker-level newsfeed that powers Wall Street.

Global corporate tax plan gains momentum as nations seek post-pandemic windfall, but will poor countries lose out?

Economic crises often spur breakthroughs, and this may again prove to be the case as a long-delayed plan to overhaul global corporate taxes gains momentum.

Group of 20 (G20) finance ministers and central bank governors added impetus to the plan on Wednesday, stating that they are committed to reaching a deal on a global minimum corporate tax by midyear.

Further progress came on Thursday when the Financial Times reported the United States calling for multinational companies to pay taxes based on sales in each country, regardless of whether they have a physical presence there - including US tech companies - a concession demanded by some nations.

Do you have questions about the biggest topics and trends from around the world? Get the answers with SCMP Knowledge, our new platform of curated content with explainers, FAQs, analyses and infographics brought to you by our award-winning team.

With the US throwing its weight behind the plan this week, while Germany and France signalled their support, prospects for a deal look better than at any time in recent history.

"The political winds have shifted notably" in favour of a deal, said Frederic Neumann, co-head of Asian economic research at HSBC in Hong Kong.

"The pandemic has left a deep budgetary hole in many economies, straining public finances, [and] that may take years to fully repair."

Ireland's 12.5 per cent corporate tax rate has helped attract so much foreign direct investment from big US tech firms - including Google, Facebook and Twitter - that it has jokingly been called America's 51st state.

By imposing a minimum global tax rate, countries hope to stem the loss of tax revenues to other jurisdictions with lower rates. After the mounting costs of the pandemic, they need those funds more than ever.

For US President Joe Biden, a global minimum tax rate also aids his plan to raise domestic taxes to 28 per cent after deductions, from 21 per cent now, without being undercut by nations with lower rates.

But it is not only developed nations that stand to gain. Developing country members of the G20 have moderately high taxes and will also have greater protection for their revenue, according to David Dollar, a senior fellow at the Brookings Institution in Washington who was formerly head of the World Bank in China.

"These latest propositions are very well aligned with India's objectives," said Akshay Mathur, head of the Geoeconomics Studies Programme at the New Delhi-based Observer Research Foundation.

"A distinct feature of India at the G20 since [Prime Minister Narendra] Modi came to power has been to fight terror financing and tax havens."