Birmingham have sold out of their allocation of 31,500 tickets for Sunday's Carling Cup final with Arsenal at Wembley.
The huge demand for tickets from season ticket holders means no tickets will be on sale to the general public.
A Blues spokesman said: "The club put in place a system that rewarded its most loyal supporters, including its season ticket holders, first and foremost and huge demand means tickets will not be available for general sale.
"We understand that many more people would have liked to have followed the club to the home of English football on Sunday to cheer on Blues against Arsenal.
"But the allocation of 31,453 was always subject to availability."