[dijksterhuis]

> When you make more and go into "the higher income band", you're not taxed more on ALL your income, just the portion that is in the new band (at least in the US).

applies in the UK too where GP is (source: my own repeat self assessments).

[SiliconSplash]

Yes I know. But often it is not worth going into the upper band at all unless you towards the top of that band. I am equating my own time, stress etc into this calculation and not just monetary amount.