The 180-Day Rule for ILR: How UK Absences Are Counted

Researched and maintained by the ILR Calculator UK editorial team · Reviewed against Appendix Continuous Residence in force on 24 June 2026 · General information about UK settlement, not regulated immigration advice. For advice on your own case, use an adviser regulated by the Immigration Advice Authority (IAA) or a solicitor.

For most UK settlement routes, you must not spend more than 180 days outside the UK in any rolling 12-month period during your qualifying years. The word that catches people out is “rolling”: the Home Office checks every possible 12-month window, not calendar years. Only whole days spent entirely outside the UK count, certain absences are disregarded, and the 10-year long residence route and British citizenship use different limits entirely.

What the 180-day rule is

The 180-day rule is part of the continuous residence requirement for Indefinite Leave to Remain, set out in Appendix Continuous Residence. To settle, you must show you have genuinely made the UK your home — and the way the Home Office tests that is by limiting how long you can spend abroad. For most routes the limit is 180 days outside the UK in any rolling 12-month period across the qualifying period, unless an absence falls under a listed exception. Exceeding it in even one 12-month window can break your continuous residence and lead to refusal, which is why it is the single most common point of failure in settlement applications.

Rolling vs calendar year: the calculation that catches people out

The most expensive mistake is assuming the 180 days resets each calendar year, or each year on your visa anniversary. It does not. The Home Office uses a rolling method: a caseworker can examine any and every 12-month slice of your qualifying period — for example 15 May 2023 to 14 May 2024, then 16 May 2023 to 15 May 2024, and so on — looking for any window where your absences exceed 180 days.

This is why a tool that tests every window matters. Our absence calculator checks each rolling 12-month period automatically, rather than relying on a yearly total.

How absence days are counted

Three counting rules decide your real total, and each can work for or against you:

• Only whole days outside the UK count. An absence is a full 24-hour day spent entirely outside the UK.
• The day you leave and the day you return do not count. Because you were physically in the UK for part of each, departure and arrival days are days of presence. A trip leaving Friday and returning Monday is two absence days, not four.
• Time before you first entered can count. If your entry clearance was granted and you then delayed travelling, the gap between the grant and your arrival can be counted as an absence — a trap that has pushed otherwise-careful applicants over the line.

The 180-day rule by route

The rolling 180-day rule covers most settlement routes, but two important cases use different limits.

Source: UK Immigration Rules, Appendix Continuous Residence (CR 3.1–3.4), and the British Nationality Act for citizenship. See the full picture on our ILR requirements page.

What counts, and what is disregarded

Almost all time abroad counts, whatever the reason — including work trips your employer required. A narrow set of absences, however, can be disregarded under Appendix Continuous Residence if you evidence them.

Source: Appendix Continuous Residence CR 3.4. Disregarded absences are not automatic — you must provide evidence such as a death certificate, medical letter, or proof of travel disruption.

What happens if you go over the limit

If your absences exceed 180 days in any rolling 12-month window and no exception applies, your continuous residence is broken for ILR purposes, and a settlement application is likely to be refused. The reassuring part is that this usually affects only your ILR eligibility, not your current leave. In most cases you can extend your current visa or switch to another category, let your travel history clear so that every rolling window is back within 180 days, and apply for ILR later. If you are close to the line, do not apply until you are certain — a refusal costs the fee and can complicate future applications.

Why citizenship is a separate test

Many people assume meeting the 180-day rule for ILR means they automatically meet the absence rules for citizenship. They do not. Naturalisation has its own limits under the British Nationality Act: usually no more than 450 days outside the UK in the 5 years before applying, and no more than 90 days in the final 12 months (the figure is 270 days over 3 years for spouses of British citizens). These are cumulative caps assessed separately from the ILR rule, so a travel pattern that passes for settlement can still fall short for citizenship. Plan both stages together with the naturalisation calculator.