UK prime minister Boris Johnson and US president Donald Trump are expected to discuss the UK DST as well as options for a post-Brexit trade agreement between the UK and the US when they meet in Davos later this week.
Tax expert Catherine Robins of Pinsent Masons, the law firm behind Out-Law, said: "It will be disappointing if the UK insists on going ahead this year with its digital services tax".
"Affected businesses face a compliance nightmare and a high chance of incurring double taxation if each country imposes its own tax on something slightly different," she said. "With the OECD intending to come up with an agreed approach by the end of this year, it seems short-sighted for countries not to hold fire, at least for this year, to see what emerges from the OECD process."
The UK's planned DST will be charged at 2% on the UK-derived revenue of social media platforms, search engines and online marketplaces. It will be payable by businesses whose global revenue from in-scope business activities is greater than £500 million and where more than £25m of that revenue is derived from UK users.
The OECD began consulting on its proposals for reform of the international tax system in order to capture revenue from the digital economy last year.
Speaking in Davos, Gurría said the OECD's plans had the support of 137 countries.
"This is not about specific digital companies, this is an issue for finance ministers finding their income going down," he said. "We need to establish new rules to avoid hundreds of billions of dollars not being paid in tax."
"Are we on track? Yes. We have been working on this digital tax plan for 2-3 years. In the second half of 2020 we will go for implementation ... We believe it is possible to deliver this deal and gain the consensus we need," he said.