Top Up TV was a pay TV service in the United Kingdom that was launched in March 2004, operating on the digital terrestrial television platform. The service aimed to "top up" Freeview customers by providing additional content and services through encrypted TV channels unavailable to other viewers.

Freeview is the United Kingdom's sole digital terrestrial television platform. It is operated by Everyone TV and DTV Services Ltd, a joint venture between the BBC, ITV, Channel 4, Channel 5 and Sky. It was launched on 30 October 2002, taking over the licence from ITV Digital which collapsed that year. The service provides consumer access via an aerial to the seven DTT multiplexes covering the United Kingdom. As of July 2020, it has 85 TV channels, 26 digital radio channels, 10 HD channels, six text services, 11 streamed channels, and one interactive channel.