How to count the number of days spent abroad for permanent residence in the UK? 12-month rolling step-by-step tutorial

Many people find out on the eve of applying for permanent residence (ILR): It turns out that they have already "stepped on the line" when leaving the country in recent years. Some people think that going out two or three times a year is fine, but the result is that one period of time actually exceeds 180 days, and the permanent residence clock is interrupted, and the five-year wait is in vain.

The problem is not "going out too much", but that is counted in the wrong way . Today, I will break down the official algorithm of GOV.UK into several steps to teach you how to calculate accurately.

Why is the British permanent residence subject to "rolling 12 months"?

Remember this hard rule first: starting from April 11, 2024, the vast majority of work-based permanent residences are eligible for Appendix Continuous Residence, which requires that they must not leave the country for more than 180 days within any rolling 12-month period of .

Pay attention to the word "scroll". It is not calculated based on the natural year (January to December), nor is it calculated based on the visa anniversary . Instead, treat every day of your 5 years as the end point of "looking back 12 months." As long as you leave the country for more than 180 days in any such window, your continuous residence will be terminated from the moment you exceed the limit.

For example: You go out for 100 days in November 2025 and another 100 days in March 2026. Viewed separately, it does not exceed 180, but when the rolling window of "November 2025 to October 2026" is framed - 200 days, it exceeds 180. This is the most common way to step into a trap.

How to count the number of days for permanent residence outside the country? Only counts "all day"

The official caliber of GOV.UK is: only counts complete whole days, and days with less than 24 hours are not counted in . In practice, the day of departure and the day of entry are both "travel days" and are usually not counted as a complete departure day.

📅 Example: Leaving the UK on January 1st and returning to the UK on January 10th. The period that is not in the UK is from January 2nd to January 9th, a total of 8 days, not 9 or 10 days. Don’t underestimate the difference between one and two days. There are really many people stuck between 179 and 181.

Before applying for permanent residence, take three step-by-step calculations

The first step: turn over your passport and make a list. lists all the "departure date" and "entry date" for each entry and exit in the past 5 years. Please refer to your passport stamp, air ticket, and eVisa entry and exit records, don’t rely on memory.

Step 2: Count each paragraph as a whole day. Count the complete days according to the above method for each trip, and write them down section by section.

Step 3: Pull the rolling window to check the calculation daily. This step is the most critical and the easiest to miss. Use the most "intensive outbound" period as the end point, look back 365 days, add up all the outbound days that fall within the window, and see if any window exceeds 180.

Pulling the window manually is tedious and easy to make miscalculations. Use the "永居计算器" APP to enter each entry and exit date, and it will automatically scan for you to . Which window is critical will be directly marked in red, eliminating the need to repeatedly draw the form.

Several exceptions and details to the 180-day rule for permanent residence in the UK

🔹 Be vigilant in 150 days. For family and private life applications, as long as you have been out of the country for more than 150 days in any 12 months, the application form will require you to list all outbound records item by item. In other words, Home Office regards 150 days as a warning signal that it is "close to the red line".

🔹 can be exempted for some legitimate reasons. The guidance states that travel abroad for work, study, or taking care of family members overseas may not be counted as 180 days under certain conditions - provided that the UK remains your permanent residence during this period and family life remains in the UK. This area of ​​judgment is complicated, so don’t take it for granted. It is recommended to consult a lawyer first.

🔹 Old accounts before April 11, 2024 will be calculated separately. If part of your departure occurs before this date, the old rules will apply during that period: continuous departures shall not exceed 184 days, and cumulative departures shall not exceed 548 days. It is easy to make mistakes when connecting old and new rules, and those who cross this node must be especially careful.

What should I do if I have already crossed the line?

Don't panic yet. The application of 180 days is slightly different for different visa types. In individual cases, exceptional circumstances can be claimed (such as severe epidemics, serious illness of relatives, stranded overseas, etc. force majeure). These exceptions have high thresholds and require sufficient written evidence, so they cannot be passed casually.

A more prudent approach is to calculate your departure account clearly one or two years in advance. Once you find that a certain window is approaching 180, proactively adjust your subsequent itinerary to stabilize the clock for continuous residence. If the exceedance is not discovered until before submission, it is often too late to remedy the problem.

This article is for reference only. The specific determination of days abroad and exemption application are consistent with the old rules. Please refer to the latest announcement of GOV.UK, or consult a licensed lawyer.

💬 Chat in the comment area: In a single rolling 12-month period in the past 5 years, how many days did you have the most overseas travel? If you are stuck between 150-180, raise your hands and see how everyone plans their itinerary.

If you find it useful, collect this article , turn it out and count it before submitting it to your permanent residence, so that you can check it later.

[Data source] GOV.UK: Continuous residence guidance (accessible version) https://www.gov.uk/government/publications/continuous-residence/continuous-residence-guidance-accessible-version; ILR (Skilled Worker) Time in the UK https://www.gov.uk/indefinite-leave-to-remain-tier-2-t2-skilled-worker-visa/time-uk

Dealing with a UK legal matter? JustiScript can help