My wife is on spouse visa in UK. How many days per year can she spend outside UK without having any problem when applying for spouse visa extension, ILR, and UK Passport? Is there any specific guidelines to this?
The issue will only become apparent on Citizenship, you must show that you have been living in the UK for the last 3 years (the ‘residential qualifying period’), and that you have spent no more than 270 days outside the UK during those 3 years. Also, you must have spent no more than 90 days outside the UK in the last 12 months of the 3-year period. (We have discretion to allow absences above the normal limits in some circumstances.)
So there won't be any issue when applying for ILR? Just to confirm, can she apply for ILR after 5 years in UK?
No but you need to be careful if you are considering citizenship. Yes 60 month and then ILR, you can apply 28 days prior to the visa ending.
