Short Answer
You must explicitly declare all global interest earnings that surpass the flat one-thousand-euro individual allowance on your annual financial returns. While the baseline capital sitting in your foreign bank accounts is left untouched, the interest generated is fully subject to domestic investment taxes.
What Most Expats Don't Realize
You left a substantial emergency cash reserve sitting in a high-yield savings account back in your home country after relocating to Frankfurt. You didn't know that the tax-free allowance (Sparer-Pauschbetrag) is strictly capped and that any extra global interest must be disclosed to the local state. The automated financial tracking systems flagged your foreign interest yields, resulting in a retroactive tax adjustment order that drained 420 € directly out of your domestic bank account.
What To Do
- Download the annual interest statements from every international savings and checking account you hold.
- Open the "Anlage KAP" attachment inside your tax preparation platform to itemize your worldwide interest profits.
- "Ich erkläre meine weltweiten Zinserträge, die den Sparer-Pauschbetrag übersteigen." (I am declaring my worldwide interest earnings that exceed the saver's flat-rate allowance.) — input this specific phrase in your tax summary statement.
The Truth
In many cultures, personal savings are treated as private matters. In Germany, the state views your global interest yields as part of your statutory obligation to fund the local social system.