Global efforts to impose a unified tax policy on Google, Facebook and other internet giants have cleared a major hurdle ahead of a G20 summit in Japan.

The Paris-based Organisation for Economic Cooperation and Development (OECD) said that 129 countries had signed off on a road-map to grab a fairer tax share of the companies’ booming sales.

OECD seeks to reach a unified long-term solution to the tax challenges posed by digitalisation of the economy by the end of 2020.

The OECD would seek the G20 finance ministers approval for the road-map when they meet in Fukuoka, Japan in June 8-9. This meeting is in preparation for a full G20 summit involving US President Donald Trump, Chinese President Xi Jinping and their peers in Osaka at the end of June.

The summit will be an important staging post on the way to the OECD’s goal of a new tax policy by the end of next year.

The research body has been tasked by the G20 to find a technical fix to the problem of Internet heavyweights taking advantage of low-tax jurisdictions such as Ireland to pay a pittance on their profits and revenues in other countries. The existing setup has cost governments up to $240 billion in lost tax revenues, the OECD estimated in 2015.

But rival proposals are in the mix to address the problem. The United States is notably pushing for a much wider approach which could ensnare European and Asian multinationals involved in other sectors beyond technology.