A gross of £145,000 sits above
the Additional Rate threshold of £125,140.
Your Personal Allowance is fully extinguished by the £100,000 → £125,140 taper, so every
pound of gross is taxable from the first one.
Earnings between £50,270 and £125,140 attract the 40% Higher
Rate; anything above £125,140 is taxed at the 45% Additional Rate. Combined with 2%
Class 1 NI above the UEL, the marginal rate on the next pound
is 47%.
Once income clears the £125,140 mark the 60%
taper trap is behind you — but pension sacrifice still earns the
headline 45% Additional Rate relief, which is the
most aggressive marginal-relief band the UK system offers.