Citizenship and ILR absence limits explained: the 90-day, 180-day and 450-day rules
For ILR you generally must not spend more than 180 days outside the UK in any rolling 12-month period across your qualifying period. For naturalisation as a British citizen, the limits are different: no more than 450 days absence over 5 years (or 270 days over 3 years if you are married to a British citizen), and no more than 90 days in the 12 months before you apply. These two sets of rules are counted separately, which is exactly why so many people get tripped up.
Below we break down each rule, how the Home Office counts your days, and what to do if you are told you exceeded a limit when your own records say you did not.
- ILR: max 180 days absence in any rolling 12-month period.
- Citizenship (5-year route): max 450 days over 5 years.
- Citizenship (3-year spouse route): max 270 days over 3 years.
- Both citizenship routes: max 90 days in the last 12 months before applying.
- ILR and citizenship absences are counted independently of each other.
The ILR rule: 180 days in any rolling 12 months
For most work and family routes, ILR is governed by Appendix Continuous Residence. You break continuous residence if you are absent for more than 180 days in any 12-month period without a permitted reason.
The word rolling matters. For permission granted on or after 11 January 2018, the Home Office does not look at fixed years. Instead, it can take any 12-month window across your qualifying period and add up your days outside the UK in that window. If any single window exceeds 180 days, continuous residence can be broken — even if every neat calendar year looks fine.
A common trap: two long trips that sit in different calendar years but fall inside the same rolling 12 months. Each looks harmless alone, but together they can push a single window over 180 days.
Day of departure and day of return are not normally counted as days of absence under the current rules, but always check your exact route. Some absences (such as a serious illness abroad or a global humanitarian crisis) can be treated as permitted in limited circumstances.
The citizenship rules: 450, 270 and 90 days
Naturalisation uses a different test. On the standard 5-year route, you should not have spent more than 450 days outside the UK in the 5 years before applying. On the 3-year route (for those married to or in a civil partnership with a British citizen), the limit is 270 days over 3 years.
On both routes there is a separate, stricter limit for the final stretch: no more than 90 days outside the UK in the 12 months immediately before your application date. You can pass the 5-year total and still fall foul of the 90-day rule if you travelled a lot in your last year.
The Home Office does have discretion
These citizenship limits are not absolute. The published caseworker guidance says discretion is normally exercised:
- For the 5-year route, where you exceed the limit by 30 days or less (so up to 480 days), caseworkers must normally exercise discretion unless there is another reason to refuse.
- Beyond that — up to 900 days (5-year) or 540 days (3-year) — discretion may still be exercised if you have clearly established your home, employment, family and finances in the UK, plus a strong reason such as Crown service, accompanying a British spouse posted abroad, career travel, or compelling compassionate grounds.
The 90-day final-year limit is treated more strictly, so plan your last 12 months carefully. For more on the wider journey, see our British citizenship timeline and what documents you need to apply for British citizenship.
What to do if the Home Office says you exceeded a limit — but you didn't
Miscounts happen. The caseworker may be working from the dates you entered on the form, from incomplete travel data, or from a misread rolling window.
Keep your own absence log: every departure and return date, with evidence (boarding passes, passport stamps, e-tickets, BRP/eVisa travel history). A clear table you can hand over resolves most disputes quickly.
Steps that typically help:
- Recheck the exact dates. Confirm whether the count includes the days of travel and which 12-month window was used. An off-by-a-few-days error often comes from counting departure/return days that should not count.
- Gather evidence for any absence the Home Office may have overlooked as permitted (illness, Crown service, a crisis abroad).
- Respond in writing with your own dated table and supporting documents if you are asked for more information before a decision.
- If a refusal has already been issued on absences you believe were miscounted, you may be able to ask for reconsideration or, in some cases, administrative review — the available remedy depends on the application type.
Because an absence dispute can decide a whole application, this is exactly the kind of legally sensitive issue where a regulated OISC adviser or immigration solicitor should review your specific dates and evidence before you respond. While you wait, you can keep your test progress moving with our free Life in the UK practice.
For a full map of where citizenship sits after settlement, see settled status vs British citizenship.