Countries That Allow Dual Citizenship in 2026

Most countries allow dual citizenship in 2026, including the United Kingdom, the United States, Canada, Australia, Ireland, France, Italy, Portugal, Switzerland and almost all Caribbean states. A minority restrict or ban it, including China, India, Japan, Singapore, Saudi Arabia and, in most cases, the United Arab Emirates.

Key facts

United Kingdom: dual and multiple citizenship fully permitted, both for British citizens acquiring another nationality and for those naturalising as British.
United States: permitted, but US citizens keep worldwide tax filing obligations.
Canada, Australia, New Zealand, Ireland, France, Italy, Portugal, Cyprus, Malta, Switzerland, Sweden, Belgium and Greece: permitted.
Turkey and most Caribbean states permit it, including via citizenship by investment.
China does not recognise dual nationality; India offers the OCI card as a long-term status rather than citizenship.
Japan generally requires choosing one nationality by adulthood; Singapore does not allow it for adults.
Austria and the Netherlands restrict it with limited exceptions; Saudi Arabia generally requires government permission.
There is no citizenship by investment route to an EU passport in 2026; Europe is reached through residency by investment and naturalisation.

Frequently asked questions

Does the UK allow dual citizenship?

Yes. You can acquire another nationality without losing British citizenship, and naturalising as British does not require giving up your existing nationality.

Which countries do not allow dual citizenship?

China, India, Japan, Singapore, Saudi Arabia and, in most cases, the United Arab Emirates. Austria and the Netherlands restrict it with limited exceptions.

Can you hold dual citizenship through investment?

Yes, where your current country permits it. Caribbean programmes and Turkey do not require you to renounce your existing nationality.

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