There are multiple definitions - click on the translation that matches your context.

Einkommensteuer

Substantiv

full

income tax

noun

Comparative law notes

The better translation would be "personal income tax", but in many cases, when the context makes it clear that the taxpayer is an individual (natural person), just income tax will be fine.

Definitions of income tax

money that you have to pay to the state as a percentage of the amount of money you make

The Mayor of London has called for Londoners to pay an extra 2p on income tax and to scrap local council tax.