UK Citizenship — Time Away in 5 Years: the rule, how days are counted, examples

Summary

To become a British citizen by naturalisation you must not have been outside the UK for more than 450 days in the 5 years before you apply. You must also have been in the UK on the first day of those 5 years, and you must meet a second limit of 90 days in the last 12 months. If you are married to a British citizen, the period is 3 years and the limit is 270 days. The Home Office decides, and it can accept a small excess, but it does not have to.

Limit: 450 days outside the UK
Period: The 5 years that end on the day your application is received
A day counts when: You are outside the UK for the whole day. Travel days do not count
Married to a British citizen: 270 days in 3 years
Law: British Nationality Act 1981, Schedule 1, paragraph 1(2)(a)
Run by: The Home Office (UK Visas and Immigration)

Who it applies to

People with indefinite leave to remain who plan to apply for British citizenship.
EU, EEA and Swiss citizens with settled status who want a British passport.
People who spent long periods abroad for work or family during their years on a UK visa.
Partners of British citizens, who use a shorter period of 3 years with a limit of 270 days.

The rule

Naturalisation is the way an adult becomes a British citizen by applying. The residence requirements are in Schedule 1 of the British Nationality Act 1981. Paragraph 1(2)(a) has two parts. You must have been in the UK at the start of the 5 years that end on the date of your application. And the number of days on which you were absent from the UK in those 5 years must not be more than 450.

Paragraph 1(2)(b) adds a second limit of 90 days in the last 12 months. It has its own tracker, UK Citizenship - Time Away in the Last Year. Both limits must be met at the same time. Paragraph 1(2)(c) says that in those last 12 months you must not have been under any time limit on your stay, which normally means you held indefinite leave to remain or settled status for 12 months. Paragraph 1(2)(d) says you must not have broken immigration law in the 5 years.

If you are married to a British citizen or are their civil partner, section 6(2) and paragraph 3 apply. The period is 3 years, the limit is 270 days, and you must have been in the UK at the start of the 3 years. The 90-day limit for the last 12 months is the same.

The Home Secretary can treat you as meeting the requirement when you are over the limit (paragraph 2). The Home Office guidance says that total absences of up to 480 days on the 5-year route, or 300 days on the 3-year route, are normally accepted. Up to 900 days, or 540 on the 3-year route, can be accepted only when you have made your home, family and a large part of your property in the UK and meet other conditions. Above that, refusal is the normal result.

For this Act, the United Kingdom includes the Channel Islands and the Isle of Man (section 50(1)). Citizenship also needs good character, English, the Life in the UK Test and an intention to keep living in the UK. The decision is a discretion: the Home Office looks at the whole application.

Why it exists

Citizenship is the strongest status the UK gives. The state wants proof that a new citizen has lived in the country for years and not only held the right to live there. A limit of 450 days in 5 years means you were in the UK for three quarters of the time. The rule that you were present on the first day shows that your life in the UK had already started 5 years ago.

Counting the days

You count the whole days you were outside the UK in the 5 years that end on the day the Home Office receives your application. The day you leave and the day you return are not counted.

Choose the day your application will be received. Go back 5 years and add one day: this is the first day of your qualifying period.
Check that you were physically in the UK on that first day.
List every trip abroad in the period with the date you left and the date you came back.
For each trip, count only the days between the two dates. Leaving on 22 September and returning on 23 September is no absence at all.
Add all trips together. The total must be 450 or lower, or 270 on the 3-year route.
Then check the last 12 months alone against the 90-day limit.

How Countr counts it. Countr counts whole days outside the UK in the 60 months that end today and compares the total with 450. It measures as if you applied today, so the number changes each day as old trips leave the period. It warns you 60 days before the limit. The sister tracker checks 90 days in the last 12 months, and both must be met together. Days in Jersey, Guernsey and the Isle of Man count as days in the UK. Countr cannot check that you were in the UK on the exact day 5 years before your application is received. It does not model the 3-year route for partners of British citizens, so for them this tracker shows more room than they have. Only days the app can see count as days away. If your photos have big gaps, your real time away can be higher.

Track UK Citizenship — Time Away in 5 Years on your phone.

Countr finds your past trips in your photos and keeps counting from there.

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Examples

Under the limit with a clear first day

Chen got indefinite leave to remain in August 2025. His application is received on 15 October 2026, so his 5 years start on 16 October 2021. He was at work in Leeds that day. His trips in the 5 years add up to 430 whole days, and 60 of them are in the last 12 months. He meets the 450-day limit, the 90-day limit and the first-day rule.

Twenty days over

Fatima worked on a project abroad in 2022 and 2023. Her whole days away in the 5 years before her application add up to 470. That is 20 days over the legal limit of 450. The Home Office guidance says an excess of up to 30 days is normally accepted when the rest of the application is in order. This is a discretion, not a right. She can also wait: each day she waits, the oldest days leave the 5-year period.

Abroad on the first day of the 5 years

Lucas wants his application to be received on 15 October 2026. Then his 5 years start on 16 October 2021. He was on holiday in Brazil from 10 to 20 October 2021, so he was not in the UK on that day and the requirement is not met. His total days away are only 200, which does not help. If his application is received on 20 October 2026, the period starts on 21 October 2021, when he was back in the UK.

Exceptions

The Home Office normally accepts total absences of up to 480 days on the 5-year route, and up to 300 days on the 3-year route.
Absences of up to 900 days (540 on the 3-year route) can be accepted when your home, family and property are in the UK and the absence was, for example, an unavoidable result of your job or you lived in the UK for years before the period.
Crown service abroad and service in the armed forces have special treatment, including for the rule about the first day.
The first-day rule can be set aside in exceptional cases, such as illness or travel restrictions that stopped you from returning. You need evidence.
People married to a British citizen use 3 years and 270 days, and they do not need 12 months without a time limit on their stay before they apply.
Days in the Channel Islands and the Isle of Man are not absences, because the Act treats them as part of the United Kingdom.

Common misconceptions

“I need 5 years with indefinite leave to remain before I can apply.”: You need 5 years of residence in the UK, on any lawful status. You need to be free of time limits on your stay only for the last 12 months. Many people apply 12 months after they get indefinite leave.
“The 450 days are counted from the day I got my first visa.”: The 5 years are counted back from the day your application is received. Trips before that period do not count, and each day you wait moves the period forward.
“If my total is under 450 days, the residence test is met.”: There are three checks: 450 days in 5 years, 90 days in the last 12 months, and presence in the UK on the first day of the 5 years. The first-day rule is separate, and people often miss it.
“Up to 480 days is the real limit.”: The limit in the law is 450. The guidance says the Home Office normally accepts up to 480, but that is a discretion and you cannot rely on it as a right.

Questions and answers

How many days can I be outside the UK before applying for British citizenship?

No more than 450 days in the 5 years before you apply, and no more than 90 days in the last 12 months. On the 3-year route for partners of British citizens the total limit is 270 days.

Do the days I travel count as days outside the UK?

No. The Home Office counts only whole days of absence. The day you leave and the day you come back are not counted.

What does it mean that I must be in the UK 5 years before I apply?

You must have been physically in the UK on the first day of your 5-year period. For an application received on 5 January 2022, the guidance gives 6 January 2017 as that day. If you were abroad on that day, the Home Office can use a later date, but it does not have to.

Do short trips of one or two days count?

A trip where you leave one day and return the next has no whole day abroad, so it counts as zero. A trip from Friday to Monday counts as 2 days, Saturday and Sunday.

Does the count start again if I leave the UK for a long time?

No. Nothing resets. The period is always the 5 years before your application, so a long trip stays in the total until it is more than 5 years old.

Do days in Ireland count as days in the UK for citizenship?

No. Ireland is a separate country, and days there are absences. Days in Northern Ireland, Jersey, Guernsey and the Isle of Man are days in the UK.

Sources

Other rules for United Kingdom

EU Settled Status — Keeping It 1,825 days away in one trip
UK Citizenship — Time Away in the Last Year 90 days away in any 12 months
UK Settlement (ILR) — Getting It Your 3, 5 or 10 qualifying years, with at most 180 days away in any 12 months. Shows the day you can apply.
UK Settlement (ILR) — Keeping It 729 days away in one trip
UK Tax Residence (SRT) 15, 45, 90, 120 or 182 midnights in each tax year from 6 April
UK Visitor Visa or Visa-Free Visit 184 days in one visit

See all trackers

This page explains the rule and how the days are counted. It is not legal or tax advice. The authority decides each case on its own facts.