It cost $2 million to film and promote last year's eight-hour Super Saturday vaxathon.
The telethon ran on October 16, alongside a day-long, nationwide push to get people vaccinated against Covid, particularly Māori who had lower rates at the time.
The Ministry of Health has released a list of thecosts.
It cost about $960,000 to film and broadcast the telethon out of Avalon studios in Wellington, with Auckland company Pango contracted to do the work.
The ministry spent a further $1.074m to promote Super Saturday through advertising and marketing on television, radio and social media
The biggest single advertising item, nearly a quarter of a million dollars, was a television campaign in the week leading up to Super Saturday to try to encourage competition between regions.
About 130,000 people were vaccinated on the day, boosting those with a first dose two percentage points to 85 per cent of the eligible population, and those with a second dose three points to 63 per cent.
About 20,000 Māori were vaccinated, with that number roughly equal between first and second doses.
