British Citizenship by Descent

Key Takeaways

• British citizenship by descent lets a person born outside the UK inherit citizenship from a British parent, and in some cases from a grandparent (double descent).
• Eligibility depends on your date of birth, which parent or grandparent was British, and that relative’s status at the time of your birth.
• “By descent” status carries one limit: a citizen by descent cannot automatically pass citizenship to a child born outside the UK, although that child may often be registered later.
• Some historic-discrimination routes (forms UKM and UKF) charge no application fee — only the £130 citizenship ceremony fee.
• Standard adult registration as a British citizen costs £1,540 plus the £130 ceremony fee, totalling £1,670 (as of June 2026).
• Where descent does not apply, the UK Ancestry visa is a five-year route for Commonwealth nationals with a UK-born grandparent.

Acquiring British citizenship can open doors to various rights and opportunities, including the ability to live and work in the UK without restrictions and to hold a British passport. One route available to people born outside the UK is British citizenship by descent — a pathway that allows certain individuals to inherit citizenship from a parent or, in some cases, a grandparent.

This page explains what citizenship by descent means, who qualifies, the rules for double and triple descent, the current fees, and how to apply. It also covers the rights of new British nationals and the alternative immigration options available to those who do not qualify.

Table of contents

• What Is British Citizenship by Descent?
• Automatic British Citizenship by Origin
• Register for British Citizenship by Descent
• What Is UK Citizenship by Double Descent?
• How to Apply for British Citizenship by Descent?
• How Much Does British Citizenship by Descent Cost?
• What Happens After You Get British Citizenship by Descent?
• Is There an Alternative to British Citizenship by Descent?
• How Can We Help?
• Frequently Asked Questions

What Is British Citizenship by Descent?

British citizenship by descent means inheriting citizenship from a British parent or grandparent rather than acquiring it through your own birth, naturalisation, or adoption in the UK. It is available to people born outside the UK who meet specific conditions.

Under the British Nationality Act, citizenship is granted in two broad ways. The first relates to the individuals themselves — birth, naturalisation, or adoption. The second is by descent, meaning a foreign national can become a British citizen because a close relative holds British nationality. Whether you qualify, and through which relative, depends on when you were born and on that relative’s status at the time.

Automatic British Citizenship by Origin

British citizenship is acquired automatically by a child born to one or two British citizens, regardless of the country of birth — provided the British parent is a citizen “otherwise than by descent” (that is, by birth, adoption, naturalisation, or Crown service in the UK, rather than themselves by descent).

Eligibility for automatic citizenship also depends on when you were born and your parents’ status at the time:

• Born on or after 1 July 2006: you automatically acquire citizenship if your mother or father is a British citizen otherwise than by descent.
• Born between 1983 and 2006: your parents generally had to be married at the time of your birth if only your father was British.
• Born before 1983: you can normally claim citizenship automatically only if your father was British and held a passport of the United Kingdom or one of the dependent territories.

If you do not acquire citizenship automatically, you may still be able to register for it — see the section below.

Register for British Citizenship by Descent

If you are not eligible for automatic citizenship, you can apply to register as a British citizen by descent. The requirements differ for those born after 1 July 2006, between 1983 and June 2006, and before 1983.

Born on or after 1 July 2006

You may apply for citizenship if you meet any of these conditions:

• You lived in the UK with your parents.
• Your British parent resided in the UK before your birth.
• You were adopted abroad by a British citizen.
• Your father was British when you were born, even if your mother was married to someone else.
• You were born in the UK and your father had indefinite leave to remain while your mother was married to someone else.

Born Between 1983 and June 2006

You may be eligible if your father was a British citizen when you were born and meets one of these conditions:

• He was born or adopted in the UK.
• He became a British citizen through naturalisation or registration.
• He was serving as a Crown servant (for example, in the diplomatic service) at the time of your birth.

Born Before 1983

Eligibility may apply if:

• Your parents were unmarried.
• Your mother was British, even if your father was not. In this case the application is usually made on form UKM, which carries no application fee.

What Is UK Citizenship by Double Descent?

UK citizenship by double descent is a route for people whose claim runs through a British grandparent rather than a parent. It applies where citizenship was not passed down in the parent’s generation but can still be claimed in the second generation, subject to strict conditions.

As with citizenship by descent, the rules depend on your date of birth and your grandparents’ status at the time. If you were born on or after 1 January 1983, one of the following must hold:

• A UK-born grandfather was in Crown service when your parent was born.
• You or your parent was born in a former colony.
• Your grandmother was UK-born and obtained citizenship by registration between 2 February and 31 December 1982.

For applicants born between 1949 and 1983, at least one of the following must hold:

• You or your parent was born in a former colony or obtained citizenship by registration.
• A parent was in Crown service when their children were born.
• Your parents married before 1949 and the father was UK-born.
• Your mother’s father was UK-born.

For those born before 1949, citizenship through a grandparent may be claimed if one of the following holds:

• You or your parent was born before 1915 or in a former British territory.
• Your mother or grandmother was married to a UK-born husband before 1949.

So if your question is “Can I get a British passport if my grandfather was British?”, the answer is often yes — most commonly for candidates born in 1983 or later, though in some cases a maternal grandfather born in Great Britain is enough for older applicants.

British citizenship can also, more rarely, be claimed through triple descent — that is, through a British great-grandparent. These claims are difficult in practice because the supporting records are old and hard to obtain, so each case needs careful assessment.

How to Apply for British Citizenship by Descent?

To apply, you register as a British citizen using the correct form for your circumstances, submitted online on the UK Government’s website (a slower postal route is also available). The form depends on when you were born and which relative is British. You must give detailed information on your parents — and, for double descent, your grandparents — including their date of birth, place of birth, marital status, occupation, and residence.

The application normally follows these steps:

1. Confirm which route and form apply to your case.
2. Gather the supporting evidence (birth, marriage, and citizenship documents for the relevant relatives).
3. Complete and submit the application on GOV.UK and pay the fee.
4. Book and attend a biometric appointment to provide your photograph and fingerprints — there is no separate fee for this.
5. Upload or have your supporting documents scanned. Preparing electronic copies in advance speeds up the process.
6. Wait for the Home Office decision.
7. If you are approved and over 18, attend a citizenship ceremony.

How Much Does British Citizenship by Descent Cost?

The cost depends on which route applies. Most adult applicants pay a registration fee plus the £130 citizenship ceremony fee; some historic-discrimination routes charge only the ceremony fee. The figures below are current as of June 2026.

Biometric enrolment is free. A child’s ceremony fee of £130 is only charged if the applicant turns 18 while the application is being decided.

What Happens After You Get British Citizenship by Descent?

Once granted citizenship by descent, you receive a UK passport and hold the same rights and responsibilities as any other British national, including full access to public services and the right to vote in elections.

There is one practical difference. A British citizen by descent cannot automatically pass citizenship to a child born outside the UK. However, that child can often be registered as British after birth — for example where the parent had lived in the UK for a continuous three-year period before the birth, and the application is made before the child turns 18. This is why it is worth taking advice early if you plan to have children abroad.

Applicants over the age of 18 are required to attend a citizenship ceremony, for which the £130 fee applies.

Is There an Alternative to British Citizenship by Descent?

Yes. People with a British parent or grandparent who do not qualify by descent may instead consider the UK Ancestry visa, a five-year route for Commonwealth nationals living abroad who can show that a grandparent was born in the UK or one of the dependent territories. Ancestry can be claimed even in cases of adoption, or where the relatives were not married.

The Ancestry visa is granted for five years and can be extended. After a qualifying period of residence in the UK, holders can apply for British citizenship by naturalisation.

How Can We Help?

Sterling Law advises individuals worldwide on every form of British citizenship and nationality, from citizenship by descent and double descent to naturalisation and the Ancestry route. Claiming citizenship through descent is a detailed process in which a single missing document can hold up an application, so experienced guidance makes a real difference.

Our work can include:

• checking your eligibility and identifying the correct route and form;
• tracing and obtaining supporting records from the relevant archives and registries;
• assessing complex double and triple descent claims;
• preparing and completing your application accurately;
• reviewing your parents’ and grandparents’ documents and evidence;
• advising on the costs of British citizenship and the right fee for your case;
• guiding you through biometrics and the citizenship ceremony;
• advising on registering children born abroad;
• preparing an appeal or judicial review if an application is refused.

Contact our immigration solicitors for a pre-submission assessment of your British citizenship by descent claim.

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Frequently Asked Questions

Can I get British citizenship if my grandfather was British?

Often yes, through double descent. Whether you qualify depends on your date of birth and your grandfather’s status and place of birth at the relevant time; a UK-born maternal grandfather is enough in some cases.

What does “British citizen by descent” mean?

It means you became British by inheriting citizenship from a British parent or grandparent, rather than through your own birth, naturalisation, or adoption in the UK.

What is the difference between citizenship “by descent” and “otherwise than by descent”?

A citizen “otherwise than by descent” acquired citizenship through their own connection to the UK and can pass it on automatically to children born abroad. A citizen “by descent” inherited it and generally cannot pass it on automatically to a child born outside the UK.

Can I claim British citizenship by double descent through my grandmother?

Sometimes. Claims through a grandmother are possible in specific situations — for example where she was UK-born and registered as a citizen in 1982, or under the historic-discrimination route for those born before 1983 whose mother could not pass on citizenship at the time.

Is triple descent through a great-grandparent possible?

It is possible but rare. The main difficulty is obtaining old records to prove the chain of descent, so each claim needs individual assessment.

Can a British citizen by descent pass citizenship to a child born abroad?

Not automatically. The child can usually be registered as British after birth if the parent lived in the UK for a continuous three-year period before the birth and the application is made before the child turns 18.

How much does British citizenship by descent cost?

Standard adult registration is £1,540 plus a £130 ceremony fee (£1,670 in total). The UKM and UKF historic-discrimination routes charge only the £130 ceremony fee. Figures are current as of June 2026.

How long does the application take?

Processing times vary by route and individual circumstances, and the Home Office aims to decide most citizenship applications within about six months.

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