British Citizenship for Spouses of British Citizens

Researched and maintained by the ILR Calculator UK editorial team · Reviewed against the British Nationality Act 1981 and Home Office Guide AN in force on 24 June 2026 · General information, not regulated immigration advice.

If you are married to or in a civil partnership with a British citizen, you can naturalise under the 3-year route (section 6(2)) instead of the standard 5-year route — and you do not have to wait 12 months after getting ILR before you apply. You still need to hold ILR, pass the Life in the UK test, meet the English and good character requirements, and stay within a 270-day absence limit. But the timeline is meaningfully shorter than for other applicants.

The 3-year spouse route

British nationality law gives partners of British citizens a faster path to citizenship, set out in section 6(2) of the British Nationality Act 1981. The route recognises the close connection to the UK that comes through marriage or civil partnership to a British citizen, and it differs from the standard route in three practical ways: a shorter 3-year residence requirement, no 12-month wait after ILR, and a more generous absence allowance relative to the period.

It is still a discretionary application made on Form AN, and meeting the minimum requirements does not guarantee a grant.

Spouse route vs the standard route

The clearest way to see the advantage is side by side:

Source: British Nationality Act 1981, sections 6(1) and 6(2); Home Office Guide AN. The main advantages of the spouse route are the shorter residence period and the removal of the 12-month post-ILR wait.

What you still need

The spouse route shortens the timeline but keeps the substantive requirements. To apply under section 6(2) you must:

• Be married to, or in a civil partnership with, a British citizen on the date you apply.
• Have lived in the UK for 3 years ending on the date of application, and have been physically present in the UK on the day exactly 3 years before.
• Hold ILR or settled status and be free from immigration time restrictions on the date you apply.
• Stay within the absence limits — no more than 270 days over the 3 years and no more than 90 days in the final 12 months. See our citizenship absence rules.
• Meet the good character requirement — see our good character guide.
• Pass the Life in the UK test and meet the English requirement at B1, unless exempt (aged 65 or over, or a qualifying medical condition).

The 12-month wait is removed — but ILR is not

This is the most misunderstood point. Removing the 12-month wait does not mean you can skip settlement. You must still hold ILR (or settled status) when you apply — what the spouse route changes is that you can apply as soon as your ILR is granted, rather than waiting a further year as standard-route applicants do.

Traps to avoid

If the marriage ends, the route can disappear

The spouse route depends on being married to a British citizen at the date you apply. If your marriage or civil partnership ends before you apply, you can no longer use section 6(2) and would have to qualify under the standard 5-year route instead — which brings back the 12-month wait and the 450-day allowance. If the relationship ends after you have applied, the application can usually still be decided under the spouse route, provided you were married on the date of application.

Absences from the spouse-visa years still count

Because the 3-year qualifying period overlaps with your time on the spouse visa, travel from those earlier years counts towards the 270-day limit. Someone who travelled heavily early on can find they have used up much of their allowance before the qualifying period even begins to run. Check the whole 3 years, not just the period since ILR.

When you are ready, the naturalisation calculator works out your earliest date and checks your absences, and our British citizenship after ILR guide covers the full process.