If you are working towards British citizenship, or you have recently been naturalised, one of the first questions that often comes up is whether you can keep your existing nationality at the same time.
The UK generally allows dual citizenship, also known as dual nationality. However, the full picture is more nuanced than that. Your other country’s rules matter just as much as the UK’s, and there are practical issues around travel, tax, military service, consular protection and family rights that are worth thinking through before you make any decisions.
This article covers what dual citizenship means in the UK context, who it applies to, and the risks and considerations you should be aware of. If you would like to talk through your specific situation, the team at Hedgley Immigration offers trusted immigration advice london for individuals navigating exactly these kinds of questions.
Does the UK Allow Dual Citizenship?
Yes. The UK allows dual and multiple nationality. This means you can be a British citizen and also a citizen of another country, provided the other country’s laws allow it.
If you become a British citizen through naturalisation, registration or descent, the UK does not generally require you to give up your existing citizenship or passport. You do not need to apply separately for “dual citizenship” in the UK. You simply become British while continuing to hold any other nationality that remains valid under the law of that country.
This is one of the reasons why many people who settle in the UK choose to pursue British citizenship even when they already hold a passport from another country. You can read more about the specifics in our dedicated blog on dual citizenship in the UK.
The Critical Point: Your Other Country’s Rules
While the UK allows dual citizenship, not every country takes the same approach. Before you naturalise as a British citizen, you need to find out whether your current country of nationality allows its citizens to hold another nationality.
Some countries do not allow dual nationality at all. Some allow it only in limited circumstances. Others may require you to apply for permission to retain your original nationality before you become British. Some countries also treat citizenship differently depending on whether the second nationality was acquired by birth, marriage, descent, registration or naturalisation.
Common examples of countries that have historically restricted or prohibited dual citizenship include China, India, Japan and Singapore, although the exact rules are detailed and can change. Some countries also have different rules for minors, people born abroad, spouses, former citizens or people with overseas citizenship-type status.
If your country of origin does not permit dual citizenship and you proceed with British naturalisation without understanding the consequences, you could lose your original nationality. For some people this may be acceptable, or even desirable. For others, it could affect family rights, property ownership, inheritance, business interests, voting rights or the ability to live and work in their country of origin.
This is one area where taking proper immigration advice london before you naturalise is genuinely important. You may need advice not only on UK immigration law, but also on the nationality law of your other country.
Tax Considerations
Holding dual citizenship does not automatically create a UK tax liability. In the UK, your tax position is usually based on your residence status and the type of income or gains involved, rather than citizenship alone.
If you are UK tax resident, you are generally taxed in the UK on your UK income and may also be taxed on foreign income and gains, depending on your circumstances and any reliefs that apply. If you are not UK tax resident, you are usually taxed only on UK-source income and certain UK assets.
The rules are particularly important for internationally mobile people. From 6 April 2025, the UK moved away from the old non-domicile remittance basis and introduced a residence-based approach to foreign income and gains. If you have overseas income, assets, trusts, companies or property, it is sensible to take specialist tax advice before and after becoming British.
The United States is a notable exception in global terms. US citizens and resident aliens can have US tax filing obligations even when living abroad. A UK-based person who holds both British and American citizenship may therefore need to consider UK and US tax rules at the same time.
This is not something to handle through immigration advice alone. If you have income or assets in more than one country, speak to a qualified tax adviser who understands both jurisdictions.
Military Service and Civic Obligations
Some countries require citizens to complete military service, national service or other civic obligations. Acquiring British citizenship does not necessarily remove those duties under your other country’s law.
If your country of origin has compulsory military service, you may still be treated as a national for those purposes, especially if that country does not recognise dual nationality. This can become a practical issue if you travel back, renew a passport, register a child, inherit property, or deal with official authorities there.
Some countries also have mobilisation rules, exit restrictions or special obligations in times of conflict or national emergency. These rules can vary depending on age, gender, residence history, family circumstances and whether the person has formally retained or lost nationality.
Before you naturalise, check your position with your other country’s embassy, consulate or a lawyer qualified in that jurisdiction.
Using the Right Passport
Passport use is now an especially important issue for British dual nationals.
As a British citizen, you should normally travel to the UK using a valid British passport. If you hold Irish citizenship, you can travel using a valid Irish passport. If you want to travel to the UK using another passport, you may need a Certificate of Entitlement to the Right of Abode placed in that passport, unless a specific exception applies.
This matters because British and Irish citizens cannot get an Electronic Travel Authorisation to travel to the UK. Instead, you are expected to prove your right to enter using a British passport, an Irish passport, or another valid passport containing a Certificate of Entitlement to the Right of Abode.
There are limited situations where a British dual citizen may be able to travel using another passport or national identity card, such as where they became British after settling under the EU Settlement Scheme and their UKVI account is properly updated. However, you should not assume this applies without checking the current travel rules before you book.
When travelling to your other country of nationality, that country may require you to use its passport. This is particularly common where the country does not recognise dual nationality and treats you only as its own citizen.
The safest approach is to plan passport renewals early and check the entry and exit rules for both countries before travelling.
Benefits of Holding Dual British Citizenship
Despite the considerations above, holding British citizenship alongside another nationality can offer significant benefits.
- Easier international travel – A British passport allows visa-free or visa-on-arrival access to many countries, although entry rules always depend on the destination and can change.
- The right to live and work in the UK permanently – British citizens can live and work in the UK free from immigration control.
- No visa renewal process – Once you become British, you no longer need to extend a visa or maintain Indefinite Leave to Remain.
- Voting rights – British citizens can vote in UK general elections and other elections where they meet the relevant registration and residence rules.
- Access to a British passport – This can make travel, identity checks and proof of status much simpler.
- Consular assistance abroad – You may be able to request British consular help overseas, although this is usually limited if you are in a country where you are also considered a national.
- Stronger security of status – British citizenship is more secure than a visa or ILR, although it can still be removed in limited and serious circumstances, such as cases involving fraud, false representation, concealment of material facts, or deprivation on public good grounds.
How Do You Get There? Routes to British Citizenship
There is not one single path to British citizenship. Several immigration routes can lead you there, provided you meet the requirements along the way.
The most common include:
- Naturalisation – After 5 years of lawful residence in the UK, you may be eligible to apply for naturalisation london, usually after holding ILR or settled status for at least 12 months. If you are married to or in a civil partnership with a British citizen, you may be able to apply after 3 years of residence once you have ILR or settled status. Our blog on british citizenship by naturalisation covers the requirements in detail.
- Registration – Some people have an entitlement or discretionary route to register as a British citizen rather than naturalise. This is common for children and can also apply to some adults with a British parent or historic nationality connection. A naturalisation and registration consultant london can clarify which route applies to you.
- Ancestry – Commonwealth citizens with a UK-born grandparent may be eligible for the UK Ancestry visa, which can lead to settlement after 5 years and, later, British citizenship. An ancestry visa consultant london can assess your eligibility.
- Long residence – If you have been in the UK continuously and lawfully for 10 years across various visa types, the long residence visa consultant london route may be available to you, leading first to ILR and then citizenship.
- Spouse or partner route – Those in the UK on a partner visa london may be able to qualify for ILR after the relevant period. If you are married to or in a civil partnership with a British citizen, you may then be able to use the 3-year residence route for naturalisation.
- Self-sponsorship – Entrepreneurs and business owners who have used the uk self sponsorship visa london route usually follow the Skilled Worker settlement path. Our article on the self-sponsorship visa UK explained explains how this works.
Regardless of which route you take, most adult applicants need to reach ILR, settled status or another form of permanent permission before applying for citizenship. Our ilr consultant london service can help you with that stage before you move on to citizenship.
It is also worth considering whether the right of abode advice london route might be relevant to you, particularly for certain Commonwealth nationals who may already have an entitlement they have not yet formalised.
Frequently Asked Questions
Will the UK make me give up my current passport when I naturalise?
No. The UK does not generally require you to surrender or renounce your existing nationality as a condition of becoming British.
However, your other country’s rules are separate. Some countries do not allow dual citizenship, or only allow it in limited circumstances. You should check your other country’s nationality law before applying.
Can I pass British citizenship on to my children?
In many cases, yes, but the rules depend on how you became British and where your child is born.
A child born in the UK to a British citizen parent is generally British from birth. A child born overseas to a British citizen parent may be British by descent, but this depends on whether the British parent is British otherwise than by descent or British by descent.
This distinction matters because a British citizen by descent does not usually pass British citizenship automatically to a child born outside the UK. Registration may still be possible in some cases.
If you are planning a family, or your children were born before you became British, it is worth getting advice on their position.
I already hold ILR — can I apply for citizenship now?
Possibly. If you are applying under the standard 5-year route, you usually need to have held ILR or settled status for at least 12 months before applying.
If you are married to or in a civil partnership with a British citizen, you may be able to apply as soon as ILR or settled status is granted, provided you meet the 3-year residence requirement and all other naturalisation rules.
Your absence record, lawful residence, English language, Life in the UK test and good character position will also be assessed.
What if my home country does not allow dual citizenship — can I still naturalise as British?
Yes. The UK may still allow you to naturalise as British if you meet the UK requirements.
However, your other country may treat your British naturalisation as a loss of your original citizenship. That could affect property rights, inheritance, travel, family rights, pensions, business ownership or your ability to live there in the future.
This is a personal decision and one where proper advice is invaluable.
Does dual citizenship affect my right to work in the UK?
No. As a British citizen, your right to live and work in the UK is not conditional on a visa, employer sponsorship or immigration permission.
Your other nationality does not reduce your right to work in the UK as a British citizen.
Can dual citizens apply for British government jobs?
Many public sector roles are open to British citizens who also hold another nationality. However, some roles, especially those involving national security, defence, intelligence or sensitive government work, may have nationality, residency or security clearance requirements.
The rules vary by employer and role, so you should check the specific job criteria before applying.
What is citizenship by naturalisation london and is it the same as registration?
Naturalisation and registration are 2 distinct legal processes for acquiring British citizenship.
Naturalisation usually applies to adult migrants who have lived in the UK for a qualifying period and hold ILR, settled status or another form of permanent permission.
Registration is a different process and often applies to children, people with a British parent, or those with a specific British nationality connection. A consultant can advise on which route applies to your situation.
Ready to Take the Next Step?
Whether you are still years away from being eligible or you are almost ready to apply, understanding the dual citizenship landscape early gives you the best chance of making informed decisions about your UK immigration journey and your wider life planning.
At Hedgley Immigration, Sean and Lydia Hedgley help individuals understand their options clearly and take the right steps at the right time. If you have questions about dual citizenship, naturalisation, or any stage of the UK immigration process, get in touch today.
- Call Sean: 07704 909490
- Call Lydia: 07587145994
- Email: sean@hedgleyimmigration.co.uk
Honest, practical advice — so you can move forward with confidence and clarity.