Keeping your ILR: the absence rule that can quietly end it
Indefinite leave to remain feels permanent, and the name encourages that. It is not unconditional. If you spend long enough outside the UK in one stretch, it ends automatically, without a decision, a letter, or a warning. For anyone who has worked years to get settled status and then takes an overseas posting, this is the rule that quietly undoes it, so it is worth knowing exactly where the line sits.
The limit for standard ILR
If you hold indefinite leave to remain (or indefinite leave to enter), it ends automatically if you stay outside the UK, Ireland and the Crown Dependencies for two or more years at a time. The key word is "at a time": it is a single continuous absence of two years, not a running total, and returning to the UK resets the clock. So a pattern of long trips does not lapse your ILR as long as no single absence reaches two years.
The limit for settled status under the EU Settlement Scheme
Settled status obtained through the EU Settlement Scheme is more generous on this point. It ends automatically only after five continuous years outside the UK, Ireland and the Crown Dependencies. For Swiss citizens the figure is four years. The same "in one stretch" logic applies.
If you cross the line
Losing ILR is not necessarily the end of the road, but it is a real setback. To come back to live in the UK you would need to apply for entry clearance as a Returning Resident, and that is not automatic: you have to satisfy the caseworker of your ties to the UK and your intention to stay, so it is a discretionary application, not a right of return. Far better not to cross the line in the first place.
The trap: citizenship has a much tighter limit
Here is the point most people miss. The two-year figure keeps your ILR alive, but if your plan is to naturalise as a British citizen, the absence limits for citizenship are far stricter, measured in days across the qualifying years rather than a single two-year stretch, and they bite long before the ILR rule does. Staying inside the two-year ILR limit does nothing to protect a citizenship application, and it is entirely possible to keep your ILR while quietly disqualifying yourself from citizenship for years through absences. If British citizenship is the goal, that tighter limit, covered in a separate guide, is the one to track, not this one.
The practical point
Two numbers, two purposes. Track your longest single absence so it never approaches two years (or five for settled status), which protects the status you already hold, and if citizenship is on the horizon, track your day-by-day absences against the tighter citizenship limits as well. SplitYear watches the single-absence lapse limit for you and warns before you get near it, with the limit shown against the rule it comes from.
SplitYear gives general information about the rules, cited to source. It is not immigration advice and does not replace a professional adviser. Rules as at the Immigration Rules and gov.uk guidance on indefinite leave to remain and settled status.