It comes as the Crown Estate, which owns property on behalf of the Queen,returned record profits of £285m to the taxpayer last year - up 6.7%.
Public funding of the Queen is expected to rise by £2m next year - to £42.8m.
Historic high
Meanwhile, a spokesman for the Scottish government has denied reports it could cut its contribution to the monarchy by between £1m and £1.5m when further powers are devolved.
The monarch is paid 15% of the Crown Estate's profits by the UK government - including from the Crown Estate in Scotland - under the Sovereign Grant formula launched in 2011.
Last year, the Queen received £37.9m from the grant - of which she spent £35.7m. That figure will increase to £40.05m this year, and is expected to rise to £42.8m next year.
It comes as the Crown Estate's annual results show its capital value is at a historic high of £11.5 billion - up 16.1%.