The IRFU is set to pocket just over €100,000 from the Netflix documentary Six Nations - a fee that could rise to almost €140,000 if a second season is commissioned.
It is believed that the Six Nations unions and CVC, the investment capital company that has taken a 14.3% stake in the championship, are to share £700,000 for providing access for the first season of the series that aims to bring the tournament to a global audience - although it won't be broadcast until next year.
That fee will rise to £850,000 in total if there is a second season of the sport's equivalent of Formula One's 'Drive To Survive'.
However some of the unions, including the IRFU, are uneasy about the lack of input that they had into the terms and conditions for the documentary - and there are concerns over the levels of access that the documentary makers are demanding.
The Ireland squad is currently training in Quinta do Lago in Portugal ahead of their championship kick-off against Wales in Cardiff on Saturday.
Warren Gatland named his team yesterday for the Principality Stadium clash, with an emphasis on the old guard that earned Wales success under the Kiwi towards the end of his first stint in the hot-seat.
Andy Farrell will name his Ireland line-up in Portugal at lunchtime tomorrow.
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