In May 2026, at the border inspection at London Heathrow Airport, a Chinese engineer holding a Skilled Worker visa was stopped - he had just returned from visiting relatives in the country, and the densely packed entry and exit stamps in his passport made the border inspector frown. Three weeks later, he received a rejection letter for his permanent residence application: "He has been away from the country for a total of 183 days in 12 consecutive months and does not meet the continuous residence requirements" . The five-year wait has come to zero because of the extra three days.
This is not an isolated case. According to the Immigration Rules Appendix Continuous Residence, the number of days away from the country in any 12-month rolling window when applying for permanent residence must not exceed 180 days - but 90% of applicants miscalculate this "12 months".
🔍 What is "Rolling 12 Months"? Not a calendar year
The 180-day rule that most people think of: "The period from January 1 to December 31, 2025 does not exceed 180 days" .
is wrong! Home Office checks any consecutive 365-day window, not a fixed calendar year. For example:
📅 Case 1: Seemingly safe exit record
· June 1-August 15, 2024: 76 days after returning to China
· December 20, 2024 - February 28, 2025: 71 days after returning to China
· May 1st - June 10th, 2025: 41 days after returning to China
Calculated by calendar year: 147 days in 2024✅ 112 days in 2025✅
But Home Office will check: June 1, 2024 - May 31, 2025 = 188 days ❌
Each overlapping 12-month window will be checked separately, and if any window exceeds 180 days, the permanent residence application may be rejected. This means that during your 5-year qualifying period, there are 1,826 different 12-month windows (5 years × 365 days) that must be compliant.
⚠️ 4 fatal calculation traps, 90% of Chinese people fall into them
Trap 1: Does the same day of entry and exit count?
Only whole days are counted. The day of departure and the day of entry will not be counted as days of absence.
Actual case:
- left the UK on May 1st → returned to on May 10th: number of days of absence = 8 days (May 2nd - May 9th)
- same-day round trip (such as leaving early for a meeting in Paris and returning late): 0 days of absence
💡 can use 永居计算器APP to automatically calculate to the day according to this rule to avoid manual calculation errors.
Trap 2: Visa effective date ≠ entry date
Your qualifying period is calculated from the visa start date on BRP, not the date you actually entered the UK. If your visa takes effect on June 1, 2021, but you only enter the country on June 20, the 19 days from June 1 to June 19 will be counted as "absence".
⚠️ real case : A Chinese HR who transferred to the UK from Singapore delayed his entry for 3 months due to family reasons after getting his work permit. When applying for permanent residence five years later, I discovered that if the delay in entry exceeds 180 days, the continuous residence period can only be recalculated from the actual date of entry.
Trap 3: Crown Dependencies (British dependencies) are also considered "departures"
If the type of visa you hold is not allowed to be counted when traveling to Jersey, Guernsey, and the Isle of Man (Crown Dependencies), it will be treated as departure. Many people think that "not leaving the UK" does not count, and they end up in trouble.
Trap 4: Offshore operations (oil wells/cargo ships) exceeding 12 nautical miles are not considered in the UK
If you work on the UK continental shelf and exceed the 12 nautical miles of UK territorial waters (such as oil drilling platforms and cargo ships), your continuous residence period will not be counted and must be counted as departure. Seafarers and petroleum engineers should pay special attention.
📊 Differences in days rules for different permanent residence paths
| permanent residence path | continuous residence period | departure limit |
|---|---|---|
| Skilled Worker/Global Talent | 5 years | Any 12 months≤180 days |
| Spouse / Partner Visa | 5 years | Any 12 months≤180 days |
| 10 years Long Residence (departure starting before April 11, 2024) | 10 years | single departure ≤184 days and total stay ≤548 days |
| 10 years Long Residence (after 2024.4.11) | 10 years | Any 12 months≤180 days |
⚠️ April 11, 2024 is the watershed : If your departure start date is before April 11, 2024, the old rules (184-day single limit + 548-day total limit) still apply to that period; subsequent departures will be subject to the new rules (rolling 12 months and 180 days).
🛡️ Special circumstances: Which departures can be "not counted"?
Not all departures must count towards the 180 days. Starting from January 11, 2018, Immigration Rules allow departures under certain special circumstances not to be counted towards the upper limit:
- Humanitarian/Economic Crisis Assistance : Such as participating in international relief efforts such as the Ebola crisis (only applicable to Tier 1 Entrepreneur/Investors and their spouses)
- UK Armed Forces Reserve: Overseas deployment while serving in HM armed forces reserve
- spouse/child accompanying : If you are a dependent and accompany the main applicant to leave the country for the above reasons, this period will not be counted in your 180 days.
But note : Departures caused by maternity leave, paternity leave, and sick leave are still calculated as ordinary departures and are included in the 180-day upper limit. Many people think that "special reasons" can exempt them. This is a misunderstanding.
💰 Consequences of exceeding the standard: not only visa refusal, but also possible restart of the time
If you leave the country for more than 6 months at a time, your continuous residence may be reset - this is more terrifying than being refused a visa, meaning you have to recalculate 5 or 10 years after you return from the country.
Even if there is no single exceedance, any 12-month window exceeding 180 days will be considered a break in continuous residence unless you can provide evidence of "serious or compelling reasons". Acceptable reasons include:
- Serious illness of the applicant or immediate family member (medical certificate required)
- Uncontrollable travel disruptions (such as flight cancellations during the epidemic, war, etc.)
However, "work needs" and "taking care of parents" are generally not accepted.
✅ Self-insurance checklist: How to accurately manage your 180-day limit
1. Real-time recording of each entry and exit
- Passport stamps, boarding passes, and hotel reservations are all retained.
- Official records can be retrieved through GOV.UK’s travel history service
- Use 永居计算器APP to synchronize records and automatically calculate rolling windows
2. Reserve safety buffer
Immigration lawyers generally recommend keeping it within 150 days every 12 months, leaving 30 days for emergencies (such as a family member who becomes ill and needs to return home urgently).
3. Do a "stress test" 6 months before application
Use a calculator to simulate: If you apply for ILR tomorrow, will each 12-month window in the past 5 years be ≤180 days? If there is any window longer than 170 days, consider delaying the application or consulting an attorney.
4. Honest declaration of when applying
The application form of Home Office will require listing all cases of departures from the country for ≥150 days within 12 months. This is to capture cases "close to 180 days". If the passport record does not match what you declared, Home Office will ask for an explanation; the departure record may be forgotten, so the applicant must be given the opportunity to clarify - but intentional concealment will result in visa rejection and a 10-year entry ban.
🎯 Latest changes in 2026: fees and accelerated channels
From 8 April 2026, the ILR application fee will increase from £3,029 to £3,226 (a 6.5% increase), and each family member will need to pay separately. plus:
- Life in the UK Test: £50
- B1 English test: about £150-200
- Super Priority Service (results next day): Extra £1,000
For a family of three, the total cost of applying for permanent residence easily exceeds £10,000. Therefore, calculating the correct number of days at once and avoiding visa rejection is more important than anything else.
📌Write at the end
The 180-day rule seems simple, but in fact it is the most error-prone and most difficult to recover part of the permanent residence application. The logic of rolling 12 months, the calculation of the day of entry and exit, the gap between the visa effective date and the entry date, the exemption conditions for special departures... every detail may make five years of waiting in vain.
If you are still 1-2 years away from applying for permanent residence, it is recommended to start recording immediately; if you are close to the 5-year mark, be sure to use professional tools (such as 永居计算器APP) to do a comprehensive audit. If you are not sure, add our lawyer on WeChat uklvshi or send an email to [email protected]. Early detection and early remediation are better than regretting later when the rejection letter comes.
💬 Interactive topic : What confusions have you encountered when calculating the number of days to leave the country? Which entry-exit stamps in your passport make you "not sure whether they count"? Chat in the comment section and we’ll help you answer.
Disclaimer : This article is for reference only and does not constitute legal advice. If your permanent residence application involves specific personal circumstances, please refer to the latest announcement of GOV.UK and the professional advice of a licensed immigration lawyer.
data source :
1. GOV.UK - Indefinite Leave to Remain: Calculating Continuous Period in UK
2. GOV.UK - Immigration Rules Appendix Continuous Residence
3. GOV.UK - Long Residence Eligibility Guidance
📚 Data source
· https://www.gov.uk/indefinite-leave-to-remain-tier-2-t2-skilled-worker-visa/time-uk
·https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-continuous-residence