How to Become a German Citizen as an American: Every Path

An American can become a German citizen through three main routes: naturalization after five years of legal residence in Germany, a claim based on German ancestry, or restoration of citizenship as a descendant of someone persecuted by the Nazi regime. A 2024 overhaul of Germany’s Nationality Act shortened the standard residence period from eight years to five and dropped the old rule that forced new citizens to give up their previous passport. Americans who naturalize now keep their U.S. citizenship.¹

Which path fits you depends mostly on your family history. If you have a German parent (and in some cases a grandparent), you may already be a citizen and just need to document it. If your ancestors were stripped of citizenship between 1933 and 1945, a separate restoration process exists with no residency or language requirements. Everyone else has to move to Germany and naturalize.

Naturalization After Five Years of Residence

This is the standard path, and it starts with getting to Germany legally. U.S. passport holders can enter Germany without a visa and apply for a residence permit at the local immigration office within the first 90 days, an option most other nationalities don’t have. You still need a qualifying reason to stay, and you can’t start working until your permit authorizes employment.²

The residence categories Americans most often use are the EU Blue Card (for degree holders with a qualifying job offer), the skilled worker visa (degree or vocational training plus a German employer), the points-based Opportunity Card for job seekers, family reunion with a resident spouse or parent, and student visas for university or PhD enrollment. Register your address with local authorities within two weeks of moving in. That registration starts your documented residency clock.

You may see references online to a three-year fast-track for exceptionally integrated applicants. It briefly existed under the 2024 reform and was repealed by the Bundestag in October 2025. Everyone now falls under the five-year rule.

What You Have to Prove

Five years of continuous legal residence is the baseline. Beyond that, an applicant needs:

German language proficiency at B1 level or above, shown by a certificate from a recognized test provider. B1 covers everyday conversations, describing experiences, and explaining opinions.
A passing score on the naturalization test: 33 multiple-choice questions on German democracy, history, and society, plus three on the state where you live. At least 17 correct in 60 minutes.³
Financial self-sufficiency, meaning you cover living costs for yourself and your dependents without drawing on Bürgergeld or social assistance. Contribution-based unemployment insurance, child benefit, and housing benefit don’t count against you.⁴
An affirmation of the equality and dignity of all people. The 2024 reform added this explicit commitment. Expressions of racism, antisemitism, or contempt for human dignity disqualify an applicant, as do polygamous marriages.¹
A clean enough criminal record. Minor offenses resulting in fines up to 90 daily rates or suspended sentences up to three months generally don’t block an application. Anything heavier makes it much harder, and serious convictions disqualify you.

The naturalization fee is 255 euros per adult and 51 euros for minors naturalizing alongside a parent. Applications go to the naturalization authority (Einbürgerungsbehörde) in the city or district where you live. Processing runs from several months to over a year depending on the office. Once approved, you receive your certificate at a public ceremony and affirm your commitment to the Basic Law.³

The Shorter Route Through Marriage

Marriage to a German citizen collapses the residence clock. You qualify after three years of lawful residence in Germany and at least two years of marriage, with both periods overlapping. Language and naturalization test requirements still apply. Registered civil partnerships count the same as marriage.⁵

Claiming Citizenship by German Descent

German citizenship passes through bloodline, not birthplace. If at least one parent was a German citizen when you were born, you may already hold German citizenship without knowing it. This is common among Americans with a German-born parent or grandparent.⁶

The specific rules depend on when you were born and whether your parents were married at the time:

Born in wedlock after January 1, 1975: German citizenship if either parent was a German citizen at birth.
Born in wedlock before January 1, 1975: Citizenship passed only through the father under the law at the time. A separate declaration process now exists for people whose German mother’s citizenship didn’t pass automatically.
Born out of wedlock to a German mother after January 1, 1914: German citizenship acquired.
Born out of wedlock to a German father after July 1, 1993: German citizenship acquired if paternity was established under German law.

There is a generational limit worth checking carefully. If your German parent was themselves born abroad after December 31, 1999, their children born abroad do not automatically become German citizens. The workaround is registering the birth with German authorities within one year. An informal notification by email, fax, or mail meets the initial deadline, but a formal application must follow.⁷

You don’t need to live in Germany to claim citizenship by descent. Apply through the German embassy or the nearest consulate in the United States.⁸

Restoration for Descendants of Nazi Persecution Victims

A separate path exists for people whose ancestors lost German citizenship because of Nazi persecution between 1933 and 1945. Article 116(2) of Germany’s Basic Law guarantees naturalization rights to those stripped of citizenship on political, racial, or religious grounds and to their descendants. Section 15 of the Nationality Act extends this to people who lost citizenship in other ways connected to Nazi persecution or who were never able to acquire it.⁹

This route has no residency requirement, no language test, and no naturalization exam. You do have to document the persecution and establish your line of descent, which usually means historical records. For applicants living outside Germany, the Federal Office of Administration (Bundesverwaltungsamt) handles the process directly, and applications must be conducted in German.¹⁰

Documents You’ll Need to Gather

Every pathway involves substantial paperwork. The specific list varies by case, but expect to produce:

A valid U.S. passport
Your birth certificate
Marriage certificates or divorce decrees, where applicable
Proof of German residence, such as your registration certificate or rental agreement
Proof of income: employment contracts, pay stubs, tax assessments, or bank statements
A German language certificate at B1 or higher
A naturalization test certificate
An FBI Identity History Summary, which costs $18 and requires fingerprint submission¹¹

Any document not originally in German needs a certified translation, which typically runs $20 to $40 per page. Your FBI background check needs an apostille from the U.S. Department of State before German authorities will accept it. U.S. birth and marriage certificates usually need an apostille from the issuing state’s Secretary of State, with fees varying by state.

Living With a German and a U.S. Passport

Germany began permitting multiple citizenships on June 27, 2024. Americans who naturalize no longer surrender their U.S. citizenship, and Germans who naturalize as Americans keep their German passport. The United States has always permitted dual citizenship on its side, so there is no conflict either way.¹²

If you received a letter from German authorities before June 27, 2024, asking you to choose between nationalities, you can disregard it. The option requirement was abolished.¹²

Carrying two passports comes with a practical rule. U.S. law requires American citizens to use their U.S. passport when entering and leaving the United States, and you may be expected to use your German passport when entering and leaving Germany. Travel to third countries on either passport raises no legal issue.¹³

You Still File U.S. Taxes Every Year

The United States taxes based on citizenship, not residence. Every American citizen, wherever they live, must file a U.S. federal income tax return reporting worldwide income. Becoming a German citizen doesn’t change this, and living in Germany means filing tax returns in both countries.¹⁴

The U.S.-Germany tax treaty prevents double taxation on the same income through foreign tax credits. In practice, German income tax rates are high enough that most dual citizens working in Germany owe little or nothing to the IRS on earned income. The filing obligation still stands.¹⁵

Two additional reporting requirements catch people out. If the combined value of your foreign bank and financial accounts exceeds $10,000 at any point in the year, you must file an FBAR (FinCEN Report 114). The threshold is cumulative across accounts.¹⁶ Americans with foreign financial assets above certain thresholds must also file Form 8938 with their tax return; the thresholds are higher for taxpayers living abroad.¹⁴ Penalties for missing either are steep, and the IRS does not treat unfamiliarity as an excuse.

Social Security Still Works Across Borders

The U.S.-Germany totalization agreement handles two things. It prevents double Social Security taxation: if you work in Germany, you and your employer pay into the German system only. If your U.S. employer sends you to Germany for five years or less, you stay in the U.S. system with a certificate of coverage exempting you from German contributions.¹⁷

It also lets you combine work credits from both countries to qualify for benefits you couldn’t otherwise reach. You need at least six U.S. credits (roughly 18 months of covered work) before German credits can be counted toward a U.S. benefit, and at least 18 months of German coverage before U.S. credits supplement a German pension. Credits stay on the record where they were earned; when foreign credits get you across the eligibility line, the initial benefit is scaled to reflect the share that came from domestic work.

If You Hold or Want a Security Clearance

Acquiring German citizenship affects U.S. security clearance eligibility, though not automatically. Adjudicators evaluate dual citizenship case by case under guidelines focused on foreign preference and divided loyalty. They weigh whether you’ve used a foreign passport, voted in foreign elections, accepted benefits from a foreign government, or served in a foreign military.¹⁸

Mitigating factors include dual citizenship that resulted solely from a parent’s nationality or birth abroad, and expressed willingness to renounce the foreign citizenship. The core standard is “unquestioned allegiance” to the United States; where doubt exists, the decision goes against granting the clearance. The same principles apply across federal agencies, not just the State Department. For military service, dual citizens have the same obligations as any other service member; complications tend to arise around deployments and classified access rather than eligibility to serve.

1
Federal Ministry of the Interior and Community. New Law on Nationality Takes Effect
2
Federal Foreign Office. Residence Visa / Long Stay Visa
3
Bundesamt für Migration und Flüchtlinge. Naturalisation in Germany
4
Federal Government Commissioner for Migration, Refugees and Integration. My Path to a German Passport – Key Facts on Naturalisation
5
Federal Foreign Office. I Am Married to a German National – Can I Apply for German Citizenship?
6
Federal Foreign Office. Obtaining German Citizenship
7
Federal Foreign Office. Law on Nationality
8
Federal Foreign Office. German Citizenship
9
Federal Office of Administration. Naturalizations on Grounds of Restoration of German Citizenship Pursuant to Article 116 (2) GG and Section 15 StAG
10
Federal Office of Administration. Citizenship
11
Federal Bureau of Investigation. Identity History Summary Checks Frequently Asked Questions
12
Federal Foreign Office. The New Nationality Law as of 27 June 2024 – FAQ
13
U.S. Department of State. Dual Nationality
14
Internal Revenue Service. U.S. Citizens and Residents Abroad – Filing Requirements
15
Internal Revenue Service. Convention Between the United States of America and the Federal Republic of Germany for the Avoidance of Double Taxation
16
Internal Revenue Service. Report of Foreign Bank and Financial Accounts (FBAR)
17
Social Security Administration. Agreement Between the United States and Germany
18
U.S. Department of State. Dual Citizenship – Security Clearance Implications