If you think a salary increase above £100,000 will automatically boost your take-home pay—think again. A little-known UK tax rule creates one of the steepest tax cliffs in the world, causing high earners to lose a shocking 60% of each additional pound they earn between £100,000 and £125,140.
This article breaks down why earning just £1 over the six-figure threshold can cost you thousands, how the tax system punishes rising income, and what employees and HR teams mu