Example
Take-home pay on GBP 120,000
A worked example showing take-home pay deep inside the personal allowance taper zone, where effective tax rates are among the highest in the UK system.
Scenario
A salary of GBP 120,000 sits deep inside the personal allowance taper zone. At this level, a significant portion of the personal allowance has already been lost, and the effective marginal tax rate on income between GBP 100,000 and GBP 125,140 is approximately 62 percent.
What to notice
At GBP 120,000, the personal allowance has been reduced from GBP 12,570 to roughly GBP 2,570. That means most of the tax-free band that lower earners benefit from has been clawed back. Each additional pound earned between here and GBP 125,140 faces the 60 percent effective rate.
A raise from GBP 120,000 to GBP 126,000 would eliminate the personal allowance entirely, but the marginal rate on the portion above GBP 125,140 drops back to the standard 42 percent higher rate. This creates the counterintuitive result where marginal rates fall after crossing GBP 125,140.
The salary sacrifice opportunity
Salary sacrifice at GBP 120,000 is one of the most tax-efficient decisions available in the UK. Each pound sacrificed to pension in the taper zone saves approximately 62p in tax and NI, compared to roughly 42p at lower income levels. A GBP 20,000 sacrifice to pension from GBP 120,000 would bring adjusted income to GBP 100,000, fully restoring the personal allowance and dramatically reducing the effective tax bill.
Practical use
Run the take-home pay calculator to see the baseline at GBP 120,000. Then use the salary sacrifice calculator to model how much pension contribution it would take to restore the personal allowance. The difference in take-home cost versus pension value gained is often striking at this income level.
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Worked examples
Worked example
Take-home pay on GBP 100,000
A worked example of take-home pay at GBP 100,000, the threshold where the personal allowance taper begins and the effective marginal tax rate can exceed 60 percent.
2 min read
Worked example
Salary sacrifice on £100,000
A worked example focused on personal allowance taper territory and why modelling this threshold matters.
2 min read
Worked example
Take-home pay on GBP 80,000
A worked example of take-home pay at GBP 80,000, approaching the personal allowance taper zone where salary sacrifice and pension planning become critical.
2 min read
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