It's supposed to be per TV, but most people just pay per household, BUT the tax pays for the ENTIRE BBC, which is the most amazing value you could imagine:

TV:
BBC1
BBC2
BBC3
BBC4
CBEEBIES
CBBC
BBCNEWS24

RADIO:
RADIO 1
RADIO 2
RADIO 3
RADIO 4
5 LIVE
BBC6
BBC7
WORLD SERVICE
+ local services all over the UK

I pay Mr Murdoch £396.00 just so I can watch around 20 games of rugby a year.