Do I have to file a German tax return if I am a US citizen living in Germany?

Yes, in many cases you do. If you are a US citizen living in Germany and you are considered a tax resident there, you generally need to file a German tax return, even if you also file a US tax return each year. For many Americans in Germany, this is one of the first big tax surprises, because filing in the US does not replace your German filing obligations.

You are usually treated as tax resident in Germany if you have a place of residence there or if you spend more than 183 days in Germany during the year. A place of residence can be broader than many people expect. It can mean a flat or house that you rent or own, but it can also mean a place you can access at any time, for example if you have your own key and the arrangement is not just a short holiday visit.

Once you are tax resident in Germany, the basic rule is that Germany taxes your worldwide income. That can include:

• ‍Salary from a German employer
• Salary earned abroad after you became German tax resident
• US rental income
• Dividends, interest and capital gains from US accounts
• Other foreign income, depending on the facts

That does not always mean Germany gets final taxing rights over every type of income. The US‑Germany tax treaty can change which country taxes certain income first, and it can also help prevent double taxation through exemptions or foreign tax credits. But even when income is not fully taxed in Germany, it may still need to be reported on your German tax return.

This is where many Americans in Germany get caught out. Some assume they do not need to file because their employer already withholds German wage tax from payroll. In some simple cases, for example if you worked the full year for one employer, had no other income, and were in the standard tax class, there may be no filing obligation. But many US expats do not fit that simple pattern, especially if they have US investments, rental income, a mid‑year move, freelance income, or a spouse with a different tax position.

A mid‑year move can be especially tricky. If you move to Germany partway through the year, Germany may tax only the income you earned after the move, but it can still use your earlier worldwide income to determine the tax rate on your German income. This is often called the progression rule, and it can lead to a higher German tax bill than many new arrivals expect.

Key Takeaways

The key takeaway is simple: if you are an American living in Germany, do not assume your German employer or your US tax preparer has fully covered your German filing duties. If you are tax resident in Germany, there is a strong chance you need a German tax return, and the return may also need to include information about your US income and assets.

A few common signs that you may need to file a German tax return:

• You moved to Germany during the year
• You have a rental property in the US
• You have a US brokerage account
• You freelance or run a side business
• You are married and your spouse’s situation affects your filing
• You received mail or notices from the German tax office

For Americans abroad, the safest approach is usually to coordinate both sides properly: a German tax advisor for the German return and a US expat tax specialist for the US return. That helps you stay compliant in both countries and reduces the risk of missed reporting, double taxation issues or avoidable penalties.