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EXPLAINER: Curbing tax avoidance by multinational companies

FILE - In this file photo dated Wednesday, June 7, 2017, The Organisation for Economic Co-operation and Development (OECD) headquarters in Paris, France. The Biden administration is pushing for agreement on a global minimum tax. The proposal from President Biden and Treasury Secretary Janet Yellen calls for at least a 15 percent rate to deter companies from using legal and accounting techniques to shift profits to low-tax countries. The proposal has given new energy to international talks being held in Paris and raised hopes of a deal by July. (AP Photo/Francois Mori, File)
FILE - In this file photo dated Wednesday, June 7, 2017, The Organisation for Economic Co-operation and Development (OECD) headquarters in Paris, France. The Biden administration is pushing for agreement on a global minimum tax. The proposal from President Biden and Treasury Secretary Janet Yellen calls for at least a 15 percent rate to deter companies from using legal and accounting techniques to shift profits to low-tax countries. The proposal has given new energy to international talks being held in Paris and raised hopes of a deal by July. (AP Photo/Francois Mori, File) FILE - In this file photo dated Wednesday, June 7, 2017, The Organisation for Economic Co-operation and Development (OECD) headquarters in Paris, France. The Biden administration is pushing for agreement on a global minimum tax. The proposal from President Biden and Treasury Secretary Janet Yellen calls for at least a 15 percent rate to deter companies from using legal and accounting techniques to shift profits to low-tax countries. The proposal has given new energy to international talks being held in Paris and raised hopes of a deal by July. (AP Photo/Francois Mori, File)

How can governments keep multinational companies from avoiding taxes by shifting profits to subsidiaries in low-tax countries?

Years of international discussion over the issue gathered momentum after U.S. President Joe Biden proposed a global minimum corporate tax rate of at least 15% and possibly higher. The Biden proposal has found support among the Group of Seven wealthy democracies, raising the prospect that a new approach to international taxation might be reached this year.

That, at least, is the goal set by the Organization for Economic Cooperation and Development in Paris, which is overseeing talks among more than 135 countries.

Here are some key questions:

What is a global minimum corporate tax? Countries would change their tax laws so that if their companies’ profits go untaxed or lightly taxed offshore, the company would face an additional, top-up tax back home to bring its rate up to the minimum.