Solidaritätszuschlag (Soli)

In English: Solidarity surcharge

A surcharge of 5.5% on top of the flat tax (not on your income). Unlike for income tax, it still applies to capital income for everyone.

Where it comes up

All terms in the glossary
These are estimates to help you plan – not financial, tax or legal advice. They use German tax rules for 2026, assume steady returns and interest rates, and simplify where the page says so. Check the figures with your bank or a tax adviser before you decide.