Comedian Dave Hughes was so shocked by the difference in pay between him and his long-time radio co-host Kate Langbroek that he took a pay cut to ensure she would get parity, it's been revealed.

The high profile radio duo chatted candidly about their contracts on their show on KIIS FM on Tuesday afternoon, after they replayed a clip from their show on International Womens Day in which Langbroek revealed a massive disparity in their earnings.

"You don't know about this," Langbroek said on air at the time. "I found out last year that you get paid 40 per cent more than I do for doing this show."

Hughes was audibly stunned.