As part of a deal negotiated in 2011, the Sovereign Grant (essentially the Queen's funding as Head of State) is calculated as:
- 15% of the profits from The Crown Estate in the previous year, OR
- the Sovereign Grant for the previous year
, whichever is the greater. (i.e. the Sovereign Grant cannot decrease from one year to the next, even if The Crown Estate were to make a loss. Handy, eh?)
As a result of profits made by The Crown Estate in the last year the amount paid to the Queen will increase from £36.1m in 2013 to £37.89m 2014, a pay rise of 4.8% (approx £34k/week). The balance of the profits go to The Treasury.
I'm guessing it's not means-tested...
More here:
http://www.bbc.co.uk/news/business-23065599