Treasury

How to fix our irrational income tax system

Published on 25 January 2024

How are income taxes structured, how has this changed, where are there problems with the system and what should the next government be looking to fix?

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Income tax and National Insurance Contributions are our biggest taxes. Together they raise almost half of all tax revenues.

National Insurance Contributions were cut at the start of the year, but we’re in the middle of a multi-year freeze in tax thresholds that will amount to a tax rise of over £40 billion by the time it’s finished. And these are just the latest in a string of changes in how we tax personal incomes.

From cliff edges and personal allowances, to Scotland's 6-band income tax system and The Beatles' scheme to minimise their tax bill, we cover all things income tax.

In our latest episode, we're joined by Helen Miller, Deputy Director at IFS and head of our tax sector, and Dan Neidle, a tax lawyer and founder of Tax Policy Associates.

Zooming In: discussion questions

Every week, we share a set of questions designed for A Level economics students to discuss, written by teacher Will Haines.

1. National insurance is paid at 10% on earnings over £12,570 and income tax is paid at 20% on earnings over this same amount. How much tax revenue would the government gain from an individual earning £25,000 a year? 
 
2. With reference to the Laffer curve, explain why the 1p increase in income tax in Scotland only produced an additional £8m in tax revenue, rather than the £53m that was anticipated.
 
3. What changes would you make to UK income tax to make it more rational?