A client once arrived at our office with a spreadsheet, three passports and the quiet panic of someone who has just realised they may have miscounted by four days. They had not. But the exercise of proving it — passport stamp by passport stamp, boarding pass by boarding pass — took the better part of an afternoon. This is the unglamorous reality of preparing for Indefinite Leave to Remain: the rules are not especially complicated, but the counting is unforgiving.
If you are approaching ILR on a Skilled Worker, partner, or other qualifying route, the absence calculation is the part most worth getting right early. Below is how to think about it.
What actually counts as an absence
For most work routes, including Skilled Worker, an absence is any day you are physically outside the United Kingdom. The Home Office's published guidance generally treats the day of departure and the day of return as days in the UK — but you should not rely on that as a buffer. If you are within five days of a limit, treat every border crossing as a full day out.
A few practical points that trip people up:
- Day trips to Ireland or short hops to the continent still count. A weekend in Dublin is an absence.
- Transit through a UK airport without clearing immigration is not a UK day. If you fly Hong Kong–Heathrow–Dublin without entering the UK, you were not in the UK.
- Time spent in UK territorial waters or on UK-flagged vessels is treated differently from time in the Republic of Ireland or the Crown Dependencies; when in doubt, count it as an absence and verify later.
- Working remotely from abroad still counts as an absence, regardless of whether you were on the UK payroll, in UK meetings, or paying UK tax that day.
The test is physical presence, not economic or contractual connection.
The rolling 12-month window — and why it is not a calendar year
This is the single most misunderstood mechanic of ILR absence counting.
Under the standard work routes, the limit is generally 180 days of absence in any rolling 12-month period during the qualifying years. It is not 180 days per calendar year. It is not 180 days per visa year. It is not 180 days between BRP renewals.
What this means in practice: on any given day during your qualifying period, you should be able to look back exactly 365 days and count fewer than 181 days of absence. If on 14 March you have been outside the UK for 179 days in the previous year, then on 15 March a single additional day abroad puts you at 180 — fine. But if on 16 March a day from the previous March falls off the back of the window, your count may drop again. The window slides forward one day at a time, and your "budget" expands and contracts with it.
This is why a static spreadsheet of yearly totals can mislead. Two trips that look harmless on an annual view — say, 100 days in late 2023 and 95 days in early 2024 — can together breach the 180-day ceiling when the rolling window catches both.
When to start counting
The start date depends on your route.
- Skilled Worker and most work routes. Counting begins from the date you were granted leave under the qualifying route, or the date you arrived in the UK to activate that leave — whichever is later. The five-year clock and the absence clock generally run together.
- Partner and parent routes (five-year route). Absence limits historically have not applied in the same numerical way as work routes; continuous residence is assessed differently, with emphasis on the relationship and on not breaking the residence pattern. Check your specific category before assuming the 180-day rule applies.
- Long Residence (ten-year route). A separate framework applies, with its own absence thresholds across the ten-year period and limits on single absences. If you are relying on Long Residence, do not import the Skilled Worker numbers — they are not the same test.
- Global Talent, Innovator Founder, and similar. Each route has its own continuous residence rules. Read the guidance for your route, not a generic summary.
If you have switched routes during your qualifying period — for example, from Student to Skilled Worker — the clock for ILR purposes generally starts from the date you entered the qualifying route, not from your first UK arrival. Time on a Student visa typically does not count towards Skilled Worker ILR.
The mistakes we see most often
After several years of reviewing absence logs, the same handful of errors recur:
- Counting calendar years instead of rolling windows. As above. This is the big one.
- Forgetting short trips. A long weekend in Paris, a wedding in Edinburgh that happened to involve a Dublin layover, a funeral abroad — all easy to omit from memory, all countable.
- Trusting passport stamps alone. E-gates, Schengen entries, and unstamped Common Travel Area movements mean your passport is an incomplete record. Cross-check against boarding passes, bank card transactions abroad, and email confirmations.
- Counting only the "main" trip. If you left the UK on 1 June and returned on 30 June, that is roughly 28 days of absence, not "June." Count the actual days.
- Assuming compassionate absences are automatically excluded. The Home Office may exercise discretion for serious illness, bereavement, or conflict, but discretion is not entitlement. Document everything contemporaneously.
- Submitting on the earliest eligible day with no margin. If your rolling count is 178 on day one of eligibility, a single forgotten trip will sink the application. Build in a buffer.
How to keep a defensible record
Treat your absence log as evidence, not a memory aid. A defensible record contains: the date of every departure and return; the destination; the reason (work, personal, compassionate); and a corroborating document reference (boarding pass, hotel booking, email). Update it within a week of each trip, not a year later.
We built ILR Timer precisely because the rolling-window calculation is tedious and error-prone to do by hand. It models the sliding 12-month window day by day and flags when a planned trip would push you over. Whether you use our tool, a spreadsheet, or a notebook, the discipline is the same: log every crossing, count physical days, and look at the rolling window — not the calendar.
FAQ
Q: I have a 10-day work trip planned that would put me at 182 days in the rolling window, but only briefly. Is that a refusal? A: A breach is a breach, even for a single day. Once the rolling count exceeds the threshold at any point, that period generally cannot later be used as qualifying residence. Reschedule the trip or delay your application.
Q: Do days I spent abroad before my Skilled Worker visa was granted count? A: No — only absences during your qualifying leave count towards the Skilled Worker ILR absence calculation. Time before that grant is not counted, though it may be relevant for other routes such as Long Residence.
Q: My employer sent me abroad for training. Does that count as an absence? A: Yes. Employer-mandated travel is still physical absence from the UK. There used to be exemptions for certain work-related absences, but the current rules generally treat all absences equally regardless of purpose. Keep a letter from your employer in case discretion becomes relevant.
If you would like the rolling window calculated for you against your actual travel history, Serene Jade's ILR Timer is built for exactly this — available on iOS, Android and the web.