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 the costs.
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.