Spouse Visa ILR – Spouse to Indefinite Leave to Remain

After holding a spouse / civil partner visa in the UK for a consecutive period of 5 years, it is possible to apply for a spouse visa ILR. The leave as a spouse must have been held for a period of exactly 5 years (60 months) before being eligible to apply for indefinite leave to remain. This period must have also been spent as a spouse of a British national or settled person, on a 5 year route to settlement.Show more

There are two different settlement routes for spouses and partners of British or settled nationals in the UK. The 5 year route and the 10 year route. You should normally know which route you are on in order to calculate when you can apply for spouse visa ILR. If not, there are ways you can find out. The most obvious would be to check the Home Office correspondence when your most recent extension application was approved.

More here - https://edmansco.com/spouse-visa-ilr/