According to the BBC KC and PW have released details of the tax they paid in the 2024-2025 Tax Year.
https://www.bbc.co.uk/news/articles/c8x2151y8q4o
Apparently KC is in the Top 100 tax payers - The Sunday Times Rich List for 2025 placed him at 238.
I think it’s good they have done this and believe they are entitled to use the same legal tax avoidance measures everyone else can use. I don’t think we have a right to know every detail of their personal wealth but this is balanced against transparency regarding the Sovereign Grant and Duchies.