Continuous residence is the single most common reason ILR applications are refused. The Home Office applies strict numerical limits to absences from the UK, and even applicants who have spent years working, paying tax, and raising families in Britain can find their ILR blocked by a long holiday, a family illness abroad, or a misunderstanding of how the rolling window is calculated. The rules differ between the 5-year and 10-year routes, and the exceptions are narrow. This article explains the exact arithmetic, the rolling window mechanics, and the kinds of evidence that will satisfy a caseworker reviewing your application.
The 5-year route: 180 days in any rolling 12 months
For applicants on the 5-year route — Skilled Worker, Global Talent, Innovator Founder, most family routes, and UK Ancestry — the rule is that absences from the UK must not exceed 180 days in any rolling 12-month period during the qualifying five years. The 180-day allowance is generous: it works out to roughly six months out of the UK per year, more than enough for normal holidays, business trips, and family visits. The allowance is per rolling window, not per calendar year, which is a critical distinction that catches many applicants off guard.
The 180-day count includes every full day the applicant is outside the UK. The day of departure and the day of return are generally counted as days in the UK if the applicant was present for any portion of those days, though Home Office guidance has shifted on this point over the years. Applicants should keep a contemporaneous travel log: a spreadsheet listing every departure date, return date, destination, and reason for travel, with supporting documentation attached. Trying to reconstruct five years of travel from memory and credit card statements is a recipe for error.
The 10-year route: 540 days and the 6-month cap
The 10-year long residence route under paragraph 276B of the Immigration Rules imposes two cumulative limits. First, total absences across the entire ten years must not exceed 540 days — an average of 54 days per year, much tighter than the 5-year route allowance. Second, no single absence may exceed six months (184 days). A single absence of more than six months breaks the chain of continuous residence, regardless of how the rest of the ten years looked.
The 540-day total is calculated by adding up every full day outside the UK across all ten qualifying years. Days of departure and return are treated the same way as in the 5-year route. The 540-day cap does not apply on a rolling basis — it is a hard cumulative total — but applicants who have used close to 540 days early in the qualifying period can find themselves boxed in for the later years, unable to take even a normal holiday without exceeding the limit. SET(LR) applicants who exceed 540 days have their application refused unless they can show exceptional circumstances or the absence falls within one of the disregarded categories.
How the rolling 12-month window works
The phrase "rolling 12-month period" is the source of more confusion than any other part of the continuous residence rules. It does not mean calendar year, it does not mean visa anniversary year, and it does not mean any fixed 12-month block. Instead, the Home Office examines every possible 12-month window within the qualifying period — every day during the qualifying five years can be the start of a 12-month window — and checks whether the applicant was absent for more than 180 days in any of those windows.
In practice, this means an applicant could have taken 90 days abroad in March and another 100 days abroad in November of the same calendar year and still be fine, if those absences did not fall within any single 12-month window crossing the boundary. Conversely, an applicant who took 100 days abroad in December 2023 and another 100 days in January 2025 — separated by more than 13 months — might still face a problem, because a 12-month window starting in mid-December 2023 would capture both absences. The arithmetic is unforgiving and is best done with a spreadsheet that checks every possible starting day.
For Skilled Worker applicants, there is a partial relief: absences for work-related travel sponsored by the employer can be disregarded, meaning they do not count toward the 180-day total. This disregard is not automatic — the employer must provide a letter confirming that the travel was for work purposes — but it can substantially increase the effective absence allowance for employees whose jobs require international travel.
Exceptions: compelling, compassionate, and work-related
The Home Office maintains a narrow list of reasons an absence may be disregarded entirely or treated as not breaking continuity. Compelling or compassionate reasons include serious illness of the applicant, a close family member's serious illness, the death of a close family member, or a significant life event such as the birth of a child abroad. Each case is decided on its own facts; the Home Office looks for documentation such as hospital records, death certificates, and travel bookings made under duress.
Pandemic-related absences during 2020 and 2021 received special treatment under Home Office Covid guidance, with extended automatic visa extensions and a willingness to disregard Covid-related absences where the applicant could not reasonably return to the UK. This exceptional treatment has largely ended for applications made in 2025 and beyond, but caseworkers still have discretion to consider pandemic-era disruptions as compelling circumstances. Work-related travel for Skilled Worker applicants, as noted above, is disregarded when supported by employer confirmation. Compulsory military service and certain Crown service deployments are also disregarded.
What permanently breaks continuity
Three things break continuous residence permanently and cannot be remedied by exceptions. First, a single absence of more than six months (184 days) on the 10-year route — with very limited exceptions for compulsory military service or a single Crown service posting. Second, a prison sentence of any length: a custodial sentence breaks the chain of continuous residence and disqualifies the applicant from ILR on the 10-year route under paragraph 276B(iii), regardless of how much time has passed since the sentence was served. Third, time spent in the UK in breach of immigration laws — overstaying, working in breach of conditions, or entering illegally — does not count toward continuous residence and may also trigger grounds for refusal under the general grounds in Part 9 of the Immigration Rules.
A gap between visas can also break continuity if the gap is more than 28 days, though Section 3C leave (which extends leave while an in-time application is pending) usually bridges the gap. Applicants who switched between visa categories — for example, from Student to Skilled Worker — should verify that the switch was made before the previous leave expired, so that there was no gap in lawful residence. A break in continuity usually means starting a new qualifying period from scratch.
Documentation: proving your absences
The Home Office cross-references ILR applications against border exit and entry data collected by the Border Force, but applicants should not rely on the Home Office to construct their travel history for them. The applicant bears the burden of proving compliance with the continuous residence rules. Recommended documentation includes: passport stamps from every passport held during the qualifying period; boarding passes or e-tickets for every international trip; employer letters confirming work-related travel; hotel and accommodation receipts; and a personal travel log summarising every absence with dates, destinations, and reasons.
For absences claimed under an exception, specific evidence is required: a hospital letter on letterhead for medical absences; a death certificate and a translated family relationship document for a bereavement; a letter from the employer on company letterhead specifying the dates and business purpose of work-related travel. Vague or unsigned letters will be rejected. Applicants whose passports are full and have been renewed should obtain a Subject Access Request from the Home Office, which provides a complete record of every entry and exit recorded against their identity.
The continuous residence rules reward careful record-keeping throughout the qualifying period. If you are mid-route and have not been tracking your absences, start today. To check your position against both the 5-year and 10-year limits, try our UK ILR calculator — and for the broader ILR eligibility picture, see our complete ILR eligibility guide.
Last reviewed June 28, 2026. This article is informational and does not constitute legal, tax, or financial advice. Consult a qualified professional for guidance specific to your situation.