🇬🇧 United Kingdom · 6 years · ILR + 1yr

🇬🇧 United Kingdom Citizenship Calculator 2026

Check if you qualify for United Kingdom citizenship. Enter your permit dates and we'll calculate your qualifying days, flag any gaps, and forecast your eligibility date.

1,825

Days required

6 yr

Qualifying window

🇬🇧 United Kingdom · Standard naturalisation route

How United Kingdom citizenship works

Usually 5 years residence plus ILR, then 12 months with ILR unless married to a British citizen

📂 Official United Kingdom government guidance

Absence limit

450

Max days outside UK in 5 years

Qualifying window

5 yrs

3 yrs if married to a British citizen

Final-year absence limit

Max days outside UK in last 12 months

Application portal

Online

Official site →

🧮 Calculate my United Kingdom citizenship eligibility

Application date

Marital status

UK presence periods

🔗 Check your eligibility on the main calculator

The CitizenshipCalculator.com main tool supports United Kingdom alongside Ireland, UK, Canada, USA, Australia and New Zealand — with Document checklist, Document Vault, travel tracker and eligibility forecasting all in one place.

→ Go to full multi-country calculator

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Data sourced from official Irish government publications. Not legal advice — verify at irishimmigration.ie. CitizenshipCalculator.com is not affiliated with the Irish Government.