zlacker

I'm not familiar with the UK tax system but the usual solution is to have progressive (?) tax bands. Example:

On the part from 0 to 1000, no taxes

1001 to 10000, ten percent

10001 to 20000, twenty percent

20000 to 30000, thirty percent

30001 and more, forty percent

So if you were earning 29000 and get a raise to 31000 those 29000 are still taxed as they used to and the extra 2000 are split among the two bands around 30k.

>>pmontr+(OP)
Yes, except like many others have pointed out there are thresholds where you lose certain tax credits and benefits, so it's entirely possible to make £1 more but lose multiple thousand(for example if you're a parent and you go from making £99,999 a year to £100k a year)

>>gambit+Cs
You are right. Those are common in my country too.