Routes to British Citizenship: Birth, Descent or Application

Maybe you were born in the UK to parents on visas, or your mother is British but you grew up in Lagos, or you've simply lived in Manchester long enough to want a British passport. Each of those situations leads to a different route to British citizenship, with different rules and fees.

This guide maps every main route so you can work out which one is yours. It's an overview. If you already know you'll be applying as an adult after settlement, our detailed walkthrough of how to become a British citizen covers the naturalisation application step by step.

Everything below reflects GOV.UK as of September 2026. Nationality law has many exceptions, so check the official page for your situation before you pay a fee.

The four ways people become British

British nationality law is set out mainly in the British Nationality Act 1981, which took effect on 1 January 1983. Almost every route falls into one of four groups:

1. Automatically at birth in the UK, if a parent was British or settled.
2. Automatically by descent, if you were born abroad to a British parent who could pass it on.
3. Registration, an application route mostly used by children and people with a family connection.
4. Naturalisation, the application route for adults who have lived in the UK and hold settled status.

The first two happen by law. You don't apply. You just prove it, usually by applying for a passport. The last two are applications the Home Office decides.

The routes are well used. Home Office statistics show 245,520 grants of British citizenship in the year ending June 2026, of which 171,435 were naturalisations and 74,085 were registrations. Indian and Pakistani nationals were the two largest groups.

Route 1: Citizenship by birth in the UK

Many people assume that being born on British soil makes you British. That stopped being true on 1 January 1983.

Born before 1 January 1983

GOV.UK says you're usually British automatically if you were born in the UK before this date. There are narrow exceptions, such as a father who was a foreign diplomat.

Born on or after 1 January 1983

You're automatically British only if, at the time of your birth, at least one parent was:

• a British citizen, or
• "settled" in the UK, which includes indefinite leave to remain (ILR), settled status under the EU Settlement Scheme and the right of abode.

Some extra rules apply to children of EU and EEA citizens, depending on the exact birth date. Before 1 July 2006, a British or settled father usually had to be married to the mother to pass on citizenship.

Route 2: Citizenship by descent for children born abroad

GOV.UK puts the core rule simply: British citizenship normally passes down one generation to children born outside the UK.

If you were born abroad on or after 1 July 2006, you're usually British automatically if a parent was a British citizen when you were born and that parent could pass it on. A parent can usually pass it on if they were:

• born or adopted in the UK
• British by their own application, such as naturalisation, rather than by descent
• working abroad as a Crown servant, for example in the armed forces or diplomatic service, when you were born

If your parent is only British "by descent" themselves, because they were also born abroad, you usually won't be British automatically. That's the one-generation limit in action.

What about grandparents?

The original version of this article suggested that grandparents or great-grandparents can pass on citizenship. For most people that's wrong. A British grandparent doesn't normally make you British.

There are two related options worth checking:

• Registration of a child, if your British parent lived in the UK for at least 3 years before you were born and meets the other conditions on GOV.UK.
• The UK Ancestry visa, for Commonwealth citizens aged 17 or over with a grandparent born in the UK, the Channel Islands or the Isle of Man. It costs £726 as of September 2026, lasts 5 years and can lead to settlement. It's a visa, not citizenship, but it can start you on the path to naturalisation later.

Route 3: Registration, mainly for children

Registration is an application route for people with an existing entitlement or strong connection. It's used most by children.

Common registration situations include:

• A child born in the UK when neither parent was British or settled, where a parent later became British or got ILR.
• A child who lived in the UK from birth until age 10, without spending more than 90 days abroad in each of those first 10 years.
• A child born abroad to a British-by-descent parent who meets the residence conditions.
• A child whose parents naturalised, who can be registered separately.

As of September 2026, GOV.UK lists the fee to register a child as £1,000. A fee waiver may be available for children under 18 who can't afford it. If the child turns 18 during the process, a £130 ceremony fee is added.

Adults who registered because they lived in the UK until 10 pay £1,670 (£1,540 plus the £130 ceremony fee).

Other registration routes

GOV.UK also lists routes for people with other types of British nationality (such as British overseas citizens), stateless people, people who renounced British citizenship and want it back, and Chagossian descendants. The Windrush scheme covers some Commonwealth citizens who settled before 1973 and their children, and it has no fee.

Route 4: Naturalisation for adults

Naturalisation is the main route for adults who came to the UK as migrants.

The standard route

As of September 2026, GOV.UK says you usually need to:

• be 18 or over
• have lived in the UK for at least 5 years
• have held ILR, settled status or indefinite leave to enter for 12 months
• have been physically in the UK exactly 5 years before the Home Office receives your application
• have spent no more than 450 days abroad in those 5 years, and no more than 90 days in the final 12 months
• pass the Life in the UK test and prove your English
• be of good character and intend to keep living in the UK

The spouse or civil partner route

If you're married to or in a civil partnership with a British citizen, you need 3 years' residence instead of 5. You still need ILR or settled status, but you don't have to wait 12 months after getting it. The absence limits are 270 days over the 3 years and 90 days in the last 12 months.

Marriage alone never makes you British. It only changes the timing.

EU citizens with pre-settled status

Some EU, Norwegian, Icelandic and Liechtenstein citizens with pre-settled status can apply after 5 years if they were working, studying or self-sufficient throughout. Check the GOV.UK page, as this is a narrower route than it sounds.

Which route fits you: a quick comparison

Figures come from GOV.UK. A British adult passport costs £102 if you apply online in the UK.

Documents, referees and costs to plan for

What you need depends on the route, but most applications ask for:

• your passport or travel document and birth certificate
• your parents' birth or naturalisation certificates, for birth, descent and child registration routes
• proof of ILR or settled status, usually through your eVisa
• evidence of residence, such as payslips, tax records or tenancy agreements
• Life in the UK test reference number and English evidence, for naturalisation

Naturalisation also needs two referees. The July 2026 Guide AN says one must be a professional person of any nationality, and the other must hold a British citizen passport and be a professional person or over 25. Both must have known you for at least 3 years and can't be related to you.

Costs beyond the application fee

• Life in the UK test: £50 per attempt
• An approved English test, if you're not exempt
• Your first British passport
• Optional priority service for citizenship: £500 extra for a decision usually within 30 working days
• Legal advice, if your case is complicated

Fees are not normally refunded if an application is refused. That's the strongest reason to confirm your route before paying.

Common myths and scams

A lot of what circulates online about British citizenship is outdated or plain wrong. Watch for these:

• "Born in the UK means British." Not since 1983, unless a parent was British or settled.
• "Your grandparent makes you British." Usually not. Check the ancestry visa instead.
• "Pay us and we'll fast-track your passport." Only the Home Office decides citizenship, and only HM Passport Office issues passports.
• "Marriage gives instant citizenship." It shortens the timeline but doesn't skip the requirements.

Step by step: working out your route

1. Start with your birth. Note where and when you were born, and your parents' nationality and immigration status on that date.
2. Check if you're already British. Use the GOV.UK "Check if you're a British citizen" tool. If you are, apply for a passport rather than citizenship.
3. If not, look at registration. Especially for children, and for people with a British or settled parent.
4. If you're an adult migrant, map the road to naturalisation. That usually means a work, family or ancestry visa, then ILR, then citizenship.
5. Check dual nationality rules in your other country before you apply.
6. Budget for the full cost, including tests, the passport and any advice.

Looking ahead: settlement rules may change

The government consulted on an "earned settlement" model between November 2025 and February 2026, which proposed a longer standard path to ILR. As of September 2026, no outcome had been published and the current rules still applied.

Separately, rules laid in March 2026 raise the English level for most settlement applications to B2 from 26 March 2027. That affects the ILR step, which comes before naturalisation for most migrants. If you're still on a work visa, our guide to UK work visas and what the terms mean explains the early stages.

Your next steps

• Check your status with the GOV.UK British citizenship checker.
• Gather your and your parents' birth and immigration documents.
• If you're registering a child, confirm the right form and the £1,000 fee.
• If you're naturalising, work out your earliest date from your ILR grant and your travel history.
• Confirm your other country's dual nationality rules.
• Keep copies of everything you submit.

Citizenship is the last step in a long journey for most people. Take the time to confirm your route, because the right application is far cheaper than a refused one.