Tax on earnings with a pension too!

stagey_2

Hi all - I am 65 in March 2010 and the company has just commenced the 'retirement' procedure - we're a small team and I will be working on 'indefinitely' as agreed with the company. I've been taking my pittance of a govenment pension £69 pr wk since I was 60 but am well aware that I am paying tax over the odds as my salary + pension is more than the £22900 income limit. As I am now in my 65th year (from March 2009) my tax allowance is £9400 (ish - forget the actual allowance figure) I am trying to work how much to reduce my salary by pa so that I can still have the same net income (more or less) but reduce my hours of working - is there some sort of formulae I could use - thanks. L