Explain why income tax in the UK is an example of progressive taxation?

Progressive taxation refers to a tax becoming progressively more substantial as an individuals income rises. This means as a person earns more income they are taxed more on the increase in income that they have earned. Within the UK, the income tax system is considered progressive as there are a number of different taxation brackets that individuals income can fall into which requires an increase in the average rate of taxation the more you earn. Therefore UK taxation can be considered a progressive system.