The £3.85bn total was recorded from 1 April to 26 September 2020.
The National Lottery operator recovered in recent months, having suffered an 18% sales hit at the beginning of the COVID-19 pandemic.
The initial decline meant retail sales fell overall by £522m, but that was soon stabilised as Camelot urged players to go online at the height of the pandemic.
A total of 1.3 million new registrations then helped digital sales increase by £455.2m.
“Like most other businesses, we’ve faced a lot of upheaval and challenges this year,” said Camelot CEO Nigel Railton.
“At the start of April, we found ourselves in an unprecedented situation – with a sharp decline in sales, retail uncertainty and our EuroMillions game in jeopardy, as some of our partner countries were under strict lockdowns.
“To add to this, we had to move overnight to the vast majority of our employees working from home – so we’re enormously proud of this set of results.”
Over the six-month period, the company awarded £2.24bn in prize money to players, creating 203 new millionaires.
Camelot holds the licence to operate the National Lottery until 2023.
