Yep.
http://www.itv.com/news/2013-07-25/how-much-will-the-royal-baby-boost-the-economy/
And they do pay tax.
In 1992, The Queen volunteered to pay income tax and capital gains tax, and since 1993 her personal income has been taxable as for any other taxpayer.
The Queen has always been subject to Value Added Tax and pays local rates on a voluntary basis. "
www.royal.gov.uk/TheRoyalHousehold/Royalfinances/Taxation.aspx
So, that would be "volunteered" as opposed to "was forced to," then. Also, it seems HRHPC has been paying tax voluntarily since 1969.
