Shiner
Those are figures for 05-06. You dont add your personal allowance to it, you pay 40% above £33300.
It was indeed last years numbers I linked to. Sorry about that. However, I think that I may be right about the other bit if you take a look though. Maybe I've read it wrongly.
Take a look at
http://www.hmrc.gov.uk/rates/it.htmThe personal allowance is £5,225.
If you scroll down the page you will see another table.
It shows that the 10% tax rate applies from £0 - £2,150 and 22% at
£2,151 - £33,300. It looks to me that the £33,301 mentioned is the first £33,301 of
taxable income i.e. £33,301 over and above the £5,225 personal allowance. After all, no-one is taxed until they have earned £5,225 yet the 10% rate is shown as applying from £0. The way I read it is that the 40% would not kick in until your profit margin hits £38,526 (£33,301 + £5,225).
Notice also that the table refers to "Taxable Bands Allowances" (my emphasis on "taxable"). I need to check this with my accountant. It won't make a difference this year but if my plans work out, it may make a difference next year.