UK naturalisation has two common adult residence routes: a five-year route for most applicants and a three-year route for people married to, or in a civil partnership with, a British citizen. Both have separate qualifying-period, physical-presence, absence, immigration-status and application conditions. A partner visa income result, an ILR grant or a settled-status record does not by itself establish that every naturalisation requirement has been met. Rules below were checked on 28 October 2026.
If you are in the UK on an Ancestry visa, settlement is a separate step before naturalisation. The UK Ancestry visa guide explains the ancestry evidence, work and maintenance conditions and the route-specific five-year ILR stage; this guide covers the later citizenship application.
Two residence routes
Absences have separate limits
Check the exact first day
Which naturalisation route fits?
The two common adult routes are set out in section 6 of the British Nationality Act 1981. The relationship route is for a person who is married to or in a civil partnership with a British citizen on the application date; being in a long-term or unmarried partnership is not enough for this particular three-year route. Other eligibility requirements still apply.
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| Route | Residence period | Immigration-status timing | Standard total absence limit |
|---|---|---|---|
| Section 6(1): most adult applicants | Five years before application | Free from immigration time restrictions on the application date and normally throughout the 12 months before it | 450 days over five years |
| Section 6(2): spouse or civil partner of a British citizen | Three years before application | Free from immigration time restrictions on the application date; there is no additional 12-month wait | 270 days over three years |
Both routes normally also use a 90-day absence limit during the final 12 months. The three-year route does not simply shorten every five-year requirement: its relationship condition, period, absence total and evidence must be checked on their own terms. See the current GOV.UK eligibility page and Form AN guidance before selecting a route.
This guide covers those standard adult routes. A child under 18 usually applies for registration rather than adult naturalisation; see our British citizenship for children guide for automatic-status checks and child registration routes. Crown or designated service, armed-forces cases, stateless people and some other circumstances can have different rules. Use the official guidance that matches the applicant rather than forcing a special case into the standard table.
Check ILR, settled status and the waiting period
For the five-year route, you generally need to hold indefinite leave to enter or remain (ILR/ILE) or another status that makes you free from immigration time restrictions at application, and usually for the preceding 12 months. Settled status under the EU Settlement Scheme is a form of indefinite leave for this purpose. If a person reaches the five-year residence point and only then receives settlement, that person will usually need to wait a further 12 months before using section 6(1). This is why the qualifying residence period and settlement date should be tracked separately. If your settlement route is sponsored work, see our UK Skilled Worker ILR guide for the earlier application stage.
If you apply as the spouse or civil partner of a British citizen, you do not normally have to hold settlement for 12 months first, but you must be free from immigration time restrictions on the date of application and still meet the three-year route. The British spouse or civil partner must be British on that date and you must provide the requested relationship evidence.
The Home Office says that, in most cases, a grant of ILR or settled status will normally satisfy the lawful-residence requirement for the qualifying period. It does not erase every other question: you still need to check your physical presence on the first day, absences, good character and all the remaining requirements. If you rely on an automatically acquired Withdrawal Agreement permanent right, or on pre-settled status, follow the specific current Form AN instructions; those routes require more precise facts than simply holding a card with a status name.
Irish citizens can generally live in the UK under the Common Travel Area without immigration permission. Home Office guidance treats Irish citizens as free from immigration time restrictions from arrival for naturalisation purposes. That does not waive the relevant three- or five-year residence period, the first-day presence rule, absences, good-character assessment or the other requirements.
Get the qualifying date right
You normally must have been physically present in the UK on the day exactly five years before the Home Office receives a section 6(1) application, or exactly three years before it receives a section 6(2) application. The Home Office may refuse an application if that first-day condition is not met, although the guidance describes limited discretion for special circumstances.
The application-received date matters. GOV.UK says an online application is received on the day it is submitted; postal applications take longer to arrive. Do not choose a date using only an anniversary on a calendar or the date you began preparing the form. Check the exact date using the route and actual submission method, then confirm that you were physically present in the required territory on the corresponding first day.
Form AN describes the relevant places as the UK and, for the spouse/civil-partner route, also lists the Isle of Man and Channel Islands for the first-day presence requirement. Read the current form instructions for how the rule applies to your route and location. Do not assume that residence in a different territory or an exceptional circumstance automatically meets the requirement.
Count absences from the UK
The normal published limits are 450 whole days outside the UK over the five-year period for section 6(1), or 270 whole days over the three-year period for section 6(2), and 90 whole days outside the UK in the final 12 months for either route. The Home Office does not count the departure date or return date as days absent. For example, if you leave on one date and return the next day, that trip contributes zero whole days outside the UK under the Form AN guidance.
These are the standard limits, not a promise that an application within them will succeed. The Home Office may exercise discretion where the limits are exceeded, with different expectations depending on the total, final-year absences, ties to the UK and reasons for travel. The guidance gives examples involving Crown service, work requiring frequent travel and compelling occupational or compassionate reasons. Discretion is fact-specific; do not plan around a presumed extra allowance.
Make a travel table before you apply:
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| Record for each trip | Why it helps |
|---|---|
| Departure and return dates | Lets you calculate whole days outside the UK using the Home Office convention |
| Destination and reason | Helps explain work, family or compassionate travel if the Home Office asks |
| Passport stamps, tickets, booking emails or employer records | Helps reconstruct dates and resolve gaps in memory |
| Whether the trip falls in the final 12 months | Lets you check the separate 90-day figure as well as the full-period total |
List every absence as accurately as you can on the form. The Home Office says it may check its own records and fill gaps or make corrections. Keep supporting evidence and explain uncertainty rather than silently omitting a trip. If your totals exceed a normal limit, read the current discretion tables and caseworker guidance before deciding whether to apply.
English, Life in the UK and other requirements
Most adult applicants need to meet both the language requirement and the Life in the UK requirement. Passing one does not satisfy the other. The Home Office’s current guidance lists exemptions, including applicants aged 65 or over and people with a long-term physical or mental condition that prevents them meeting the requirements. The length of time you have lived in the UK is not itself an exemption.
The language requirement concerns speaking and listening in English, Welsh or Scottish Gaelic. Depending on your circumstances, accepted evidence can include an approved B1-or-higher Secure English Language Test, an eligible degree taught in English, or nationality from a majority English-speaking country. A qualifying B1 test accepted for settlement may also satisfy the citizenship language requirement; check the exact current rule. Do not book a new test automatically, but do not assume an old certificate or any English-taught course is accepted either. Use the official approved English language test guidance.
You normally need to pass the Life in the UK test and provide its reference number. The Home Office says applicants granted EUSS settled status still need to meet the language and Life in the UK requirements before naturalising unless exempt. Check the official Life in the UK test guidance for current booking arrangements.
Other requirements include being at least 18, meeting the good-character requirement and, on the five-year route, intending to continue living in the UK (subject to the stated exceptions). The spouse/civil-partner route has its own statutory conditions. This guide does not assess criminality, immigration breaches, identity, referees or other individual evidence.
Application, cost and ceremony
Read the current Form AN instructions, complete the correct application and upload the requested evidence. The Home Office may ask about identity, status, residence dates, absences, referees and the basis of your application. Do not rely on a document list from a previous visa application without checking the current citizenship form.
As checked on 28 October 2026, GOV.UK lists the naturalisation application and ceremony cost as £1,839 (£1,709 application fee plus £130 ceremony fee) and says a decision usually takes six months, although some applications take longer. Fees and processing times can change; confirm the live figures before applying. If approved, an adult applicant must normally attend a citizenship ceremony and make the required pledge or oath. Approval notification is not the ceremony, and you become a British citizen at the ceremony. You can apply for a British passport after receiving your citizenship certificate.
There is no FinanceTool naturalisation eligibility calculator. A residence-day or absence counter could not assess settlement status, first-day presence, good character, discretion or all the application conditions. Use the Home Office application process and guidance for the decision. If your route is the partner Family visa, its financial test is a separate application-stage question; our UK partner visa financial requirement guide explains that test but does not establish citizenship eligibility.
People who do not yet have settlement may be considering a different permission route. The UK Private Life visa and settlement guide explains the age-specific immigration tests; meeting one does not establish the later naturalisation residence or presence requirements.
A preparation sequence
- 1Choose the route — Check whether section 6(1) or the British-citizen spouse/civil-partner route under section 6(2) matches your situation on the application date.
- 2Confirm settlement timing — Check when you became free from immigration time restrictions and whether a 12-month wait applies to your route.
- 3Verify the first-day date — Work back exactly five or three years from the expected Home Office receipt date and confirm your physical presence on that date.
- 4Reconcile the travel log — Count whole days outside the UK, separately total the final 12 months and review the current discretion guidance if a normal limit is exceeded.
- 5Prepare language, Life in the UK and application evidence — Check whether previous evidence still qualifies, confirm any exemption from both tests, and follow the current Form AN checklist.
Frequently asked questions
What is the difference between the five-year and three-year naturalisation routes?
Can an unmarried partner of a British citizen use the three-year route?
Do I need to wait 12 months after getting ILR or settled status?
Does settled status mean I have met every naturalisation residence rule?
What date must I have been in the UK?
How many days can I have been outside the UK?
Are the dates I leave and return counted as absence days?
Do I still need the English and Life in the UK requirements if I have settled status?
Do Irish citizens need ILR before applying?
Does meeting the residence and absence limits guarantee citizenship?
Does the Family visa financial requirement count toward naturalisation?
Official sources
- GOV.UK: Naturalisation eligibility and fees — route overview, settlement status, residence, absences, fee and decision-time information.
- Home Office: Form AN naturalisation guidance — route-specific legal conditions, exact-date presence, absence calculations and discretion, language and Life in the UK requirements, evidence and ceremony.
- GOV.UK: How to apply — application method and submission timing.
- GOV.UK: Approved English language tests — accepted English language evidence.
- GOV.UK: Life in the UK test — test process and current booking information.
Immigration and nationality rules, fees and forms can change. Check the live Form AN guidance and eligibility page immediately before applying. This guide was last checked on 28 October 2026.