The monarch doesn't own it. It's not well defined, but if anything, the state owns it, with some of the profits from the estate being used to fund the monarch.

The monarch doesn't own it. It's not well defined, but if anything, the state owns it, with some of the profits from the estate being used to fund the monarch. https://en.wikipedia.org/wiki/Crown_Estate https://en.wikipedia.org/wiki/Crown_Estate (And the monarch is still exempt from inheritance tax on their private property, e.g. Balmoral.)