How to apply for British citizenship

Before paying anything, check whether you are already a British citizen or entitled to register as one. The rules turn on where and when you were born, your parents' status and marital position at the time, and whether a territory was a British colony at the relevant date.

People born in the UK before 1 January 1983 are generally British citizens regardless of their parents' status, because the law changed on that date. People born in the UK on or after that date are British citizens only if a parent was a British citizen or settled here at the time — which is why children born in the UK to parents on visas are not automatically British.

A child born in the UK who is not a citizen at birth can register as one if a parent later becomes settled or British while the child is under 18, and there is a separate entitlement for a child who lives in the UK for the first ten years of their life. Both are registration routes rather than naturalisation, with different fees and different requirements. They are frequently missed.

Descent from a British parent can confer citizenship automatically, though citizenship by descent generally cannot be passed on again to a child born outside the UK. There are also specific routes for people with a British parent, people born to British Overseas Territories citizens, people of Chagossian descent, stateless people, and Irish citizens, each with its own conditions.

Being a British national of another category — British Overseas Territories citizen, British Overseas citizen, British National (Overseas), British subject or British protected person — is not the same as being a British citizen, and several of those categories have their own registration routes into citizenship.

GOV.UK has a checker that walks through the main possibilities, and there is a separate service to confirm whether you already hold citizenship. If your history is complicated, an immigration adviser regulated by the Immigration Advice Authority or a solicitor is worth the fee — the application fee at stake is far larger, and it is not refunded if you apply on the wrong basis.

You must be 18 or over, of sound mind, and intend to continue living in the UK or to work for the Crown or a British-established body abroad.

Residence: on the standard route you must have been in the UK lawfully for at least five years before the application, and have held indefinite leave to remain, settled status under the EU Settlement Scheme, or an equivalent form of settlement for at least the twelve months immediately before you apply. On the spouse or civil partner route, where your partner is a British citizen, the residence period is three years and you can apply as soon as you hold settlement, without the extra twelve months.

You must have been physically in the UK on the day exactly five years — or three on the spouse route — before the Home Office receives your application. This is a precise date and an application submitted a day early on this test fails.

Absences: there are limits on total days spent outside the UK during the qualifying period, and a tighter limit on the final twelve months. Count every trip, including short ones and same-week returns, and use passport stamps, boarding passes, bank records and travel emails to reconstruct the list — the form asks for dates and destinations. Where you exceed a limit, the Home Office may still exercise discretion, and the factors it considers include whether the excess was small, whether the absences were for work, illness or family reasons, and whether your ties to the UK are clearly established. Do not assume discretion will be exercised, and do not conceal absences, which turns a discretionary problem into a good character problem.

You must not have breached immigration law during the qualifying period. Periods of overstaying, working in breach of conditions, or being in the UK without leave are treated seriously and can restart the relevant clock rather than merely counting against you.

You must meet the knowledge of language and life requirements, and the good character requirement, both covered below. And you need two referees who meet defined conditions — one must be a professional person and one a British citizen aged over 25, neither related to you, neither your solicitor or agent, and neither with an unspent conviction. Choosing an ineligible referee is a common and entirely avoidable reason for delay.

Fees are substantial and include a separate ceremony fee. They are not refunded if the application is refused. The fee schedule is published by the Home Office and changes, so take the current figures from GOV.UK before budgeting.

Book and pass the Life in the UK Test. It is a computer-based multiple-choice test taken at an approved centre, based on the official handbook covering British history, government, law, culture and customs. You must book in advance with a set minimum notice, take approved identification matching the booking exactly, and attend the centre you booked — a mismatch between the name or address on your booking and your identification is the most common reason people are turned away and lose the fee.

You get the result the same day and a unique reference number that the citizenship application requires. There is no limit on retakes but each attempt costs the fee again, so use the official handbook rather than unofficial question banks, which are frequently out of date.

Meet the English language requirement. You can do this with an approved secure English language test at the required level in speaking and listening, with a degree taught or researched in English, or by being a national of a country the Home Office accepts as majority English-speaking. Exemptions apply if you are over a certain age, or have a long-term physical or mental condition preventing you from meeting it, supported by medical evidence.

If you already met the requirement for your settlement application, you generally do not need to meet it again — but check, because the level required and the accepted evidence have changed over time and an old certificate may have expired.

The good character requirement is the least well understood and the most common reason for refusal. It is not limited to criminal convictions. It covers criminal history including cautions and out-of-court disposals, and sentencing thresholds affect how long a conviction blocks an application. It covers immigration history — illegal entry, overstaying, working in breach, deception in a previous application, and assisting others to breach immigration law. It covers financial matters including bankruptcy, unpaid debts, deliberate non-payment of tax or National Insurance and failure to file returns. It covers deception and dishonesty in any dealings with government, notoriety, and involvement in war crimes, terrorism or serious organised crime.

Declare everything, including motoring offences, fixed penalties, cautions and anything you consider trivial or spent. The Home Office has access to police and tax records, and the risk of non-disclosure is not that the underlying matter blocks the application but that concealing it is treated as deception — which is itself a good character failure and far harder to recover from than the original issue.

Where there is a driving conviction, an old caution, an unpaid tax matter or a period of overstaying, get advice before applying rather than after a refusal. The fee is not refundable and a refusal on good character grounds is a poor foundation for reapplying.

Apply online through GOV.UK using the route that matches your basis — indefinite leave or settled status, spouse of a British citizen, British parent, born in the UK, and so on. Applying on the wrong route is a common and expensive error, which is why establishing your basis first matters.

Complete the form with your full residence and travel history, your referees' details, your Life in the UK Test reference and your English language evidence. Take time over the absence dates, and keep a copy of everything you submit.

Pay the application fee and the separate ceremony fee. Some fees are payable at different stages depending on the route, and none is refunded if the application fails.

Provide biometrics — fingerprints and a photograph — at an appointment, unless you can use the identity verification app for your route. You will also need to prove your identity and, in most cases, provide your biometric residence permit or share your eVisa details. If you hold physical documents, follow the current instructions on what to send, as the Home Office has moved to digital immigration status and the requirements have changed.

Then wait. Processing times vary considerably and the Home Office publishes indicative periods rather than guarantees. You can travel while the application is pending, but tell the Home Office if you will be abroad for an extended period, and be aware that your immigration status continues to apply — naturalisation does not change your status until it completes.

If the application is approved you receive an invitation to a citizenship ceremony, which you must attend within a set period, normally three months. Councils run the ceremonies and you book through your local authority. In Northern Ireland and Scotland ceremonies are also run locally, with the same legal effect.

You are not a British citizen until the ceremony. At it you make an oath or affirmation of allegiance and a pledge, and receive your certificate of naturalisation. Only then can you apply for a British passport, and only then does your previous immigration status become irrelevant.

If the application is refused, there is generally no right of appeal, but you can apply for reconsideration within a time limit where you believe the decision was wrong, and judicial review is available on public law grounds. Reapplying after addressing the reason for refusal is often the more realistic route, and taking regulated advice at that point is sensible.

Apply for a British passport once you have the certificate. The certificate of naturalisation is not a travel document, and you will need the passport to travel as a British citizen. Keep the certificate permanently and securely — replacements are possible but slow, and it is the document that proves your status for the rest of your life and for your children's claims.

Update your records. Tell HMRC, your employer, your bank, the DVLA and the electoral registration office. Becoming a British citizen changes your voting entitlement: British citizens can vote in all UK elections, whereas many people held only partial voting rights beforehand depending on nationality.

The UK permits dual nationality, so becoming British does not require you to renounce your existing citizenship as far as UK law is concerned. Your other country may take a different view, and some countries automatically remove citizenship on naturalisation elsewhere. Check the rules of your other nationality before the ceremony, because the consequences fall outside UK control.

Children are not included automatically. A child under 18 does not become British because a parent naturalises; a separate application to register them is needed, with its own fee, though a child born in the UK after a parent becomes British or settled is generally British at birth. Applications for children can often be made at the same time as the parent's.

Citizenship by naturalisation can be passed on, but citizenship acquired by descent generally cannot be passed to a child born outside the UK. This distinction matters for families who move abroad afterwards and is one of the more consequential technicalities in British nationality law.

Citizenship acquired by naturalisation can in principle be deprived where it was obtained by fraud or false representation, or on conduct grounds in narrow circumstances. This is another reason full disclosure at the application stage matters — the risk of an omission does not end when the certificate is issued.

Immigration and nationality law is reserved to the UK Parliament, so the requirements are identical in England, Scotland, Wales and Northern Ireland. What differs locally is the practical layer: ceremonies are arranged by councils in Great Britain and by local registration arrangements in Northern Ireland, and the surrounding services — English classes, advice organisations and library access to the Life in the UK handbook — are delivered through devolved systems and vary in availability.