Nairobi, May 27 -- The Kenyan government is set for a major windfall in tax revenue from the sale of Diageo Plc's 65 percent stake in East African Breweries Plc (EABL), underscoring the lucrative nature of mega corporate deals to the exchequer.

Diageo is selling its 65 percent stake in EABL to Asahi Group Holdings in a deal that will see the British multinational brewer pay an estimated Sh41.5 billion in capital gains tax (CGT) to the Kenya Revenue Authority (KRA), according to a source close to the transaction.

The KRA is set to receive 15 percent of the net gains that Diageo made on top of its initial investment of Sh30 billion in EABL over the past 26 years, from the Sh307 billion it will receive for the sale.

This leaves the Britis...