Rank Requirements.

[Kaisuke (MitC)]

Shinigami Ranks

Captain Commander - level 500, Mastered Shunpo, Mastered Shikai, Mastered Bankai, Mastered All Kido and 40k base stats.

Captain - Level 300, Mastered Shunpo, Mastered Shikai, Mastered Bankai, Mastered All Kido and 20k base stats.
Lieutenant - Level 200, Mastered Shunpo, Mastered Shikai, Mastered 3 Kido and 7k base stats.

Arrancar Ranks

Espada Leader - Level 500, Mastered Sonido, Ressurecion and 40k base stats.

Espada - Level 300, Mastered Sonido, Ressurecion and 20k base stats.

(Note that by each number the stat requirements goes up with 1.5k)

Vaizard Ranks

Vaizard Leader - Level 500, Mastered Shunpo, Mastered Shikai, Mastered Bankai and 40k base stats.

Vaizard Knight - Level 300, Mastered Shunpo, Mastered Shikai, Mastered Bankai and 20k base stats.

(Note that by each number the stat requirements goes up with 1.5k)

[Takashi]

For those who need a more direct display of rank req's

Espada # Req's
#9 - 20,000 all stats.
#8 - 21,500 all stats.
#7 - 23,000 all stats.
#6 - 24,500 all stats.
#5 - 26,000 all stats.
#4 - 27,500 all stats.
#3 - 29,000 all stats.
#2 - 30,500 all stats.
#1 - 32,000 all stats.
#0 - 33,500 all stats.

Vaizard # Req's
#10- 20,000 all stats.
#9 - 21,500 all stats.
#8 - 23,000 all stats.
#7 - 24,500 all stats.
#6 - 26,000 all stats.
#5 - 27,500 all stats.
#4 - 29,000 all stats.
#3 - 30,500 all stats.
#2 - 32,000 all stats.
#1 - 33,500 all stats.