You should apply before your current visa expires — ideally 8–12 weeks before. Once submitted, you can legally remain in the UK while the Home Office processes your application (known as 'Section 3C leave').

Applicants must be in a genuine and subsisting relationship with a British citizen, someone with settled status or pre-settled status in the UK, or a person with refugee or protected status. Both partners must usually be aged 18 or over and intend to live together permanently in the UK. The applicant must also meet the financial, English language, and suitability requirements set by the Home Office.

In many cases, couples are expected to show that they have lived together in a relationship similar to marriage for at least two years. However, recent Home Office guidance recognises that some couples may have valid reasons for not cohabiting, such as work, study, or cultural restrictions. Strong evidence of a genuine and durable relationship is still essential in every application.

The Home Office may consider documents such as joint tenancy agreements, shared bills, bank statements, travel records, photographs, and communication history. Statements from friends and family can also support the application where appropriate. The evidence should demonstrate an ongoing relationship and a genuine intention to live together permanently in the UK.

Applicants must usually show that they meet the minimum income requirement set by the Home Office or have sufficient savings to support themselves without relying on public funds. Income can come from employment, self-employment, pensions, or other permitted sources. The exact financial threshold and evidential requirements can vary depending on individual circumstances and any dependent children involved.

Some applicants can switch to an Unmarried Partner Visa from within the UK if they already hold a valid visa that permits switching. However, visitors and certain short-term visa holders are generally not allowed to apply from inside the UK. It is important to check eligibility carefully before submitting an application.

An initial Unmarried Partner Visa is usually granted for 2 years and 9 months if applying from outside the UK, or 2 years and 6 months if applying from within the UK. Before the visa expires, applicants can usually apply for an extension if they continue to meet the requirements. After five years on the partner route, many applicants become eligible to apply for Indefinite Leave to Remain.

Typical documents include passports, proof of relationship, evidence of cohabitation, financial documents, accommodation details, and English language evidence. Applicants may also need to provide biometric information and certified translations for non-English documents. The exact documentation required will depend on the applicant’s personal circumstances and immigration history.