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Illustrative figures based on 2025/26 UK tax bands (England, Wales & Northern Ireland). Not financial advice.
Between £100,000 and £125,140 of income, your personal allowance is tapered by £1 for every £2 earned. Combined with 40% income tax, this creates an effective 60% marginal rate on income in that band.
Common approaches include pension contributions and salary sacrifice, which reduce your adjusted net income. ClarityISA is educational only — speak to a qualified adviser for personal recommendations.
Scottish taxpayers face a similar trap, but the combined effective rate differs because Scottish income tax bands are different from the rest of the UK.