UK Citizenship Day Calculator
Calculate your time outside the UK over 5 years (max 450 days) and last 12 months (max 90 days) per official gov.uk Form AN rules. Free, private, open source.
Ready to calculate
Add your first trip
Your route and date are set. Add absences to see a meaningful eligibility verdict instead of an empty result.
Which application route?
Two routes available. Choose the one that fits your situation.
Most applicants. ILR (Indefinite Leave to Remain) must have been held for at least 12 months. Max 450 days outside UK in 5 years.
For those married to a British citizen. ILR must be in place at application date (no 12-month wait). Max 270 days outside UK in 3 years.
5-year window: 20 May 2021 → 20 May 2026
We look back 5 years from this date.
Last 12 Months
(max 90 days outside)
Remaining: 90 days
Last 5 Years Total
(max 450 days outside)
Remaining: 450 days
Eligibility Verdict
You meet the official day limits. Once you confirm the other requirements, you can apply.
Your trips over the last 5 years
You haven't added any trips yet
Add your first trip to get started. Enter your departure and return dates.
Professional PDF Report
Download your calculation with official references as a PDF.