But campaigning by dozens of parties is already under way. Bangkok's pavements are disappearing behind a blizzard of party posters making all kinds of promises to the voters.
In the end, though, this election is really about one thing: can Pheu Thai win by a sufficiently large margin to ensure it takes power again? Nearly every poll is predicting that it will once again be the largest party, as it has been in every election for the past 22 years, relying on strong loyalty to Mr Thaksin in the north and north-east.
Some think it may even win an outright majority of seats in the lower house. But that may not be enough, given the enduring animosity towards him and his allies from conservative royalists and the military.
In the past, judicial rulings or military coups have prevented three Thaksin-backed governments, including one led by his sister Yingluck, from completing their term.