Buckingham Palace filings show King Charles III paid £12.9M in tax for 2024-25 and £11.7M the prior year, about £30M in voluntary payments since he became king in September 2022.The documents list Duchy of Lancaster receipts near £25M, Duchy of Cornwall revenue for Prince William at roughly £21.6M–£22.9M, and a Crown Estate net profit of £487M for the year ending March, down from £1.1B.The Palace says the disclosures aim to increase transparency as the Sovereign Grant rises to £137.9M to finish Buckingham Palace renovations, but critics including Republic say they still do not reveal the full scale of royal assets and contrasted the move with Donald Trump's tax opacity.