Tottenham's majority shareholders ENIC Sports Inc have announced they will be putting an extra £150m into the club.
The announcement came two days after Spurs secured Champions League football for next season by beating Norwich 5-0 to finish fourth in the Premier League.
Boss Antonio Conte has previously asked for his squad to be strengthened.
"Additional capital from ENIC will enable further investment in the club at an important time," said Spurs chairman Daniel Levy.
The money can be spent on transfers and player wages if needed.
A Tottenham statement said the "investment represents permanent capital, with no ongoing interest cost to the club" and provides the club "with greater financial flexibility and the ability to further invest on and off the pitch".