On May 13, Beijing time, the Celtics made great progress in the Eastern Conference semifinals, and G3 defeated the Cavaliers to regain the initiative in the series. At the moment, Celtic are also seen as the top favourites to win the title. As the star of the team, Tatum is very likely to complete an early contract extension this summer. According to salary expert Keith Smith, Tatum is eligible to sign a five-year, $314.8 million contract with the Celtics this summer. Considering that the Celtics have locked Brown for 5 years and 304 million last year, there is no reason why they should not renew Tatum's contract.
Tatum was named to the All-NBA team last season, which made him eligible for an early contract extension with a super cap salary. Jaylen Brown was also named to the All-NBA team last year, and then the Celtics threw him the highest five-year, $304 million contract in NBA history in the offseason. However, at that time, many people already realized that Tatum would break Brown's record next year. With the salary cap expected to rise again, Tatum is on the verge of breaking teammate Brown's all-time high-ever contract.
Tatum's contract was originally due to expire in 2026, but he had a player option for the 25-26 season, so if he signs a super-max contract, the contract will start in the 25-26 season. For the Celtics, there's no reason why they shouldn't give Tatum this max contract. Brown Jewel is in front, and if the Celtics don't give it to the absolute will lose Tatum. And as a current top-10 active player in the NBA, Tatum is at his peak, and with the salary cap rising, this contract will not be too surprising in five years.
Of course, the Celtics will run out of salary caps after the double-cap contract extensions for Tatum and Brown. Fortunately, the team has locked in Porzingis and Holiday and the team will be a strong title contender for the next few years, which will also allow them to attract a lot of quality players to invest in the base salary. From this point of view, the Celtics will also let Tatum record the most expensive contract in the NBA in 78 years anyway.