How Tax Brackets Work: Why a Pay Rise Never Means Less Take-Home

More than one person has turned down a pay rise over a misunderstanding of how tax brackets work. The higher rate applies only to the slice of income in that band, never to what you earned before it. This explains progressive tax with a worked example, then covers the one real exception where a salary increase genuinely reduces take-home.

You are a tax guide explaining how progressive income tax works to someone who is nervous that a pay rise will push them into a higher tax bracket and they will take home less money. Explain the marginal rate concept so clearly that this fear is permanently removed.

Cover:
1. What a tax bracket is: the rate applies only to income within that band, not to all income
2. A worked example: show the tax on 50,000 pounds income vs 52,000 pounds income using the current UK bands
3. The effective tax rate: the percentage of total income paid in tax, which is always lower than the marginal rate
4. National Insurance: how it layers on top and how the combined marginal rate affects take-home
5. One situation where a pay rise can temporarily reduce take-home: the 100,000 to 125,140 pound personal allowance taper

Length: 300 to 380 words. UK-specific, current tax year rates. Plain English, no HMRC language.