The idea of a minimum global corporate tax rate is becoming reality. 

A group of 136 countries, including New Zealand, has agreed to a landmark deal, which will see large multinationals taxed at a minimum 15 percent. 

The treaty requires companies to pay taxes in the countries where they do business. 

PricewaterhouseCoopers Tax Partner Geof Nightingale told Mike Hosking 15 percent makes things pretty tight for multinationals. 

"The 15 percent's being criticised as a low rate, but I think it's a benchmark baseline that will change a lot of behaviour." 

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