The Brazilian winger had travelled to London on the Eurostar en route to the Spurs training ground.
Moura discussed personal terms and underwent tests with the Tottenham medical staff at their Enfield base.
The 25-year-old was desperate to quit PSG having been frozen out by boss Unai Emery.
He had issued various come and get me pleas and despite rumoured interest from Manchester United, Spurs’ £25m bid was accepted.
Moura failed to start a single game for PSG this season and has only appeared off the bench on six occasions.
But Spurs fans will be encouraged by his impressive tally of 16 goals and seven assists from the previous campaign.