The announcement comes ahead of the series' return to China, after a four year absence due to the COVID-19 pandemic, with two races in Shanghai this weekend.
Porsche have now committed for seasons 13 to 16 and the next generation of GEN4 cars to be introduced from 2026-27. Rivals Nissan and Jaguar have already confirmed their long-term involvement in Formula E.
"Right from the outset, we regarded our Formula E commitment as long-term. The evolution of racing vehicles shows how much development potential there is in e-mobility," said Porsche board member Michael Steiner.
"We want to glean even more knowledge from Formula E that we can transfer to our road sports cars."