Austrian dual citizenship is one of the questions people ask first and the one they can least afford to guess. The general rule is to avoid it, there are important exceptions, and mistakes can be hard to reverse. This post sets out what the official pages and the courts say, in plain English, and what to check in your own situation before you take any step. It is general information, not advice on your case.
Not legal advice. This page gives general information about Austrian citizenship rules, drawn from official Austrian government pages and checked in October 2026. It cannot assess your case. Rules, dates and procedures change, so confirm them with the Austrian embassy or consulate, the responsible provincial authority (in Vienna, MA 35) or a qualified lawyer before you file anything.
The general principle
The Interior Ministry’s page on dual citizenship describes the principle of avoiding double or multiple citizenships in Austrian law. For people who become Austrian by naturalisation, the general conditions on the migration portal include, as a rule, the loss of the previous nationality. For Austrian citizens who want to acquire a foreign citizenship, the page says they must apply in writing for permission to retain Austrian citizenship before acquiring the foreign one. If permission is not obtained in advance, the loss of Austrian citizenship occurs automatically.
Three exceptions that matter for ancestry
- Citizenship at birth. If a child acquires another citizenship automatically at birth in addition to the Austrian one, the child keeps both. The official page gives the example of citizenship from the other parent or from birth in a country that grants citizenship by place of birth.
- The Section 58c declaration. The Interior Ministry page for persecuted persons and descendants says the rules allow them to acquire Austrian citizenship without giving up their previous nationality.
- Retention permission. An Austrian citizen can ask in advance for permission to retain Austrian citizenship when acquiring another, if the conditions are met.
The first two exceptions are what make dual citizenship possible for many families with Austrian ancestry. They are specific, and they do not turn into a general right to hold two passports.
The catch: your other country’s rules
The Interior Ministry page on the persecution route says that in some states citizenship is lost automatically when a person acquires a foreign one, and that anyone in doubt should ask the citizenship authority of their home state. The embassy page repeats the point. Because the page says acquisition of Austrian citizenship takes effect when the declaration reaches the authority, it advises clarifying this with your home authorities before filing, and not afterwards. This is the most important practical step in the whole process, and it is the one people skip.
| Situation | What the official pages say |
|---|---|
| A child acquires Austrian and another citizenship at birth | Both are kept; no choice is required at adulthood under Austrian law, though the other state may require one |
| A persecuted person or descendant files a Section 58c declaration | Austria does not require giving up the previous nationality; check your home state’s rules first |
| An Austrian citizen acquires a foreign citizenship | Permission to retain Austrian citizenship must be obtained before the foreign citizenship is acquired, otherwise loss occurs automatically |
| A foreign national applies for naturalisation | As a rule the previous nationality is lost |
How loss happens
Courts have explained how the loss rule works. The Administrative Court has held in several decisions that under section 27 of the Citizenship Act, a person who acquires a foreign citizenship on the basis of their own application, declaration or express consent loses Austrian citizenship, unless retention was permitted beforehand. The decisions say the loss happens by operation of law, whether or not the person intended it, and that a later permission cannot undo a loss that has already occurred. Those are court statements about specific cases, and they show why the timing of permission matters. You can read one example on the Jusline decision database.
The consequences can include the loss of residence rights and of European Union citizenship, which some court decisions address through a proportionality review. We cannot assess how that would apply to any individual, and a lawyer is the right adviser if the question is live.
What this means for a descendant
If you are a descendant considering a declaration, three checks come before everything else. First, read your home state’s rules on acquiring another citizenship, and ask its authority in writing if they are unclear. Second, check whether any ancestor in your line might have lost Austrian citizenship by acquiring another nationality, since that may affect the route that applies. Third, note that dual citizenship obtained in one country can interact with the rules of a third, for example if you plan to live or work elsewhere.
Invented example: Imagine an invented descendant, Sofia, who lives in a country whose law removes citizenship when a person voluntarily acquires another. She wants to file a Section 58c declaration. Before filing, she asks her home authority in writing whether acquiring Austrian citizenship would end her current one and whether any exception applies. The answer decides whether the declaration is worth making. Had she filed first and asked afterwards, the Austrian citizenship would already have taken effect on arrival of the declaration. This is a made-up case to show the order of steps.
Questions to put to your home authority
- Does acquiring a second citizenship by declaration affect my citizenship?
- Is there an exception for citizenship acquired by descent, or through restitution laws?
- Is there a retention or permission process, and when must I apply?
- Are there consequences for tax, military service or voting?
- Can I get the answer in writing?
Where to go next
Read the descent guide for the routes, the declaration process for the steps, and the birth rules for citizenship at birth. The citizenship guide gives the short overview.
Dual citizenship rules differ by country and change. Confirm your own position with the Austrian embassy, your home authority or a lawyer before acting.
