How to Declare Foreign Income and Foreign Accounts to German Tax Office

Imagine discovering a letter from the Finanzamt questioning your undeclared rental income from that holiday home in Spain or dividends from a US investment account. For many Germans with international ties, this scenario is all too real. Whether you're an expat earning abroad, a freelancer with global clients, or simply holding foreign bank accounts, understanding how to declare foreign income and foreign accounts to the German Tax Office is essential to stay compliant and avoid penalties in 2026.

Germany taxes its residents on worldwide income, but the rules differ for non-residents, and double taxation treaties often provide relief. This guide breaks down the process step-by-step, with practical tips tailored for us in Germany. We'll cover residency status, what to declare, the forms you'll need, and how to report those tricky foreign accounts. By the end, you'll know exactly what to do before the 31 July 2026 deadline for self-filed returns.

Understanding Your German Tax Residency Status

Your tax obligations hinge on whether Germany sees you as a resident or non-resident. Residents face tax on worldwide income, while non-residents are taxed only on German-sourced income.

What Makes You a Tax Resident?

• Wohnsitz (permanent home): If you have a home available to you in Germany that you use regularly.
• Gewöhnlicher Aufenthalt (habitual abode): Spending more than 183 days in Germany per year, or having your centre of vital interests here (family, economic ties).
• If ties are unclear, nationality or mutual agreement between tax authorities decides.

For example, if you're working remotely for a German employer from Portugal but keep your Berlin flat, you're likely still a resident. Expats moving abroad retain residency if they maintain a domicile or earn German-source income like rentals.

Residents vs Non-Residents: Key Differences

Aspect	Tax Residents	Non-Residents
Taxable Income	Worldwide	German-sourced only
Examples	Foreign salary, pensions, investments	German rentals, capital gains on German assets
Forms	ESt1 A + Anlagen	ESt1 C + specific Anlagen

Pro tip: Use the Finanzamt's online residency checker or consult ELSTER for your status before filing.

Types of Foreign Income You Must Declare

As a tax resident, all foreign income must be declared on your German return—no exceptions. Common categories include:

• Employment income: Salaries, bonuses from abroad jobs. Use Anlage N-AUS.
• Self-employment profits: Freelance earnings from international clients. Report via Anlage S or G.
• Pensions: Foreign retirement benefits, subject to allowances.
• Investment income: Interest, dividends, capital gains. Subject to 25% Abgeltungsteuer (plus 5.5% solidarity surcharge, totalling 26.375%). Investor allowance: €1,000 per person (€2,000 joint).
• Rental income: From overseas property, declared in Anlage V or AUS.
• Capital gains: Profits from selling foreign assets, especially if within 10 years for real estate.

Non-residents declare only if it's German-sourced or untaxed at source, like certain rentals. For 2026, note the basic tax allowance rise to €12,348 and child allowance to €9,756.

Avoiding Double Taxation

Germany has treaties with over 90 countries, including the US-Germany DTT, allowing credits for foreign taxes paid (Anlage AUS). For instance, if you pay 20% tax in Spain on rental income, claim a credit against German liability. Always attach foreign tax certificates.

"Nothing in the Convention shall be construed to prevent the Federal Republic of Germany from imposing its taxes on amounts included in the income of a resident."

Declaring Foreign Bank Accounts and Assets

Beyond income, Germany requires reporting foreign accounts to combat tax evasion. Since 2016, the Außensteuergesetz (AStG) mandates disclosure if:

• The account balance exceeds €50,000 at any point (for investment income).
• It's a Depotkonto (securities account) generating income.
• You control foreign entities (CFC rules apply for passive income over 50% thresholds).

How to Report Foreign Accounts

1. Anlage KAP: For capital income from foreign accounts/investments.
2. Anlage AUS: Detail foreign income and taxes; include account details (IBAN, bank name, country).
3. ELSTER or paper form: Submit with your Einkommensteuererklärung. For non-residents, ESt1 C.
4. Threshold: No need to report if total foreign financial assets under €801 (now €1,000 for 2026), but declare income anyway.

Example: Your French savings account earns €500 interest. Report it in Anlage KAP, claim the investor allowance, and note any French withholding tax in Anlage AUS.

Failure to report can trigger fines up to €25,000 per account, plus back taxes with 6% interest. Use the BZSt (Bundeszentralamt für Steuern) portal for automatic exchange info (AEOI/CRS).

Step-by-Step Guide to Filing Your Declaration

1. Gather Documents

• Foreign income statements (P60, 1099, etc.).
• Bank statements, tax returns from abroad.
• Double taxation certificates.

2. Choose Your Method

• ELSTER: Free online portal (mandatory for most since 2023).
• Steuerberater: For complex cases (€200-500 fee, tax-deductible).
• Deadline: 31 July 2026 (self-file); 28 Feb 2027 with advisor.

3. Complete the Forms

Form	Purpose	Who Needs It
ESt 1 A	Main return for residents	Tax residents
ESt 1 C	Main return for non-residents	Non-residents with German income
Anlage N-AUS	Foreign employment income	Expats with abroad salary
Anlage AUS	All other foreign income/taxes	Anyone with foreign income
Anlage V	Rentals (German or foreign)	Property owners

4. Submit and Pay

File via ELSTER, pay any balance by deadline. Expect a Bescheid (assessment) within 6-12 weeks.

Practical Tips for Compliance in 2026

• Track everything: Use apps like Taxfix or Sorted for ELSTER integration.
• Claim deductions: Foreign work expenses, moving costs if job-related.
• Watch CFC rules: If you own >50% of a foreign company with low-tax passive income, it may be attributed to you.
• Update your address: Notify Finanzamt and Rentenversicherung if abroad.
• Seek help early: Krankenkasse or Arbeitsagentur won't assist with taxes—use make-it-in-germany.com for expats.

For US citizens in Germany, note FATCA/CRS overlap but file separately.

Next Steps to Stay on Top

Download ELSTER software today, collect your 2025 foreign documents, and run a mock filing. If your situation involves multiple countries or high assets, book a Steuerberater via the Steuerberaterkammer. Remember the 2026 updates: higher allowances mean potential refunds—file early!

Disclaimer: This is general guidance based on 2026 rules. Tax laws change; always consult a qualified Steuerberater or Finanzamt for personalised advice.