When is a year a year for CGT ?

The scenario - House has been PPR for 1 year 10 months. Second house bought so letting out 1st house. (Stamp duty difference is owed). If first house is sold after 1 year 2 months then how is CGT liabilty recorded. If it were a clean 2 years PPR and 1 years rental it would normally be (3 - 2)/3 to give a 33% CGT liabilty on the sale price but what way are the years rounded? Would it be worth waiting 2 months before letting for this reason ?

you don't have to round up to years, or even months. you can use an exact number of days to make the apportionment.

you should note that the last 12 months of ownership of a house that was at any time your PPR is DEEMED to be a period when you occupy it as your PPR (even if you are in fact letting it out and occupying another house as your real PPR). you should bear this in mind when apportioning the CGT charge.