|>>|| No. 89602
>'I won't take a raise because I'll pay more in tax'.
It's rare, but it's certainly possible to lose out on a raise. When the UEL and the HR threshold have been in different places, it's been possible to find yourself in a position where you pay less tax if you get a bigger raise.
I once lost out on a raise twice in the same year. Working in the NHS, I hit my anniversary and gained a point, but it took me over a pension threshold and so I ended up taking home less. A couple of months later, we got the annual 1% raise, but at the same time lost the contracting-out discount for NI. As a result, my gross salary was around £2k higher, but my take-home was around £50 a month less.