if you going commercial its best to not include it in your PIC time because later on you will just have to rip it all out. Most logbooks will have a spare column label it PICUS and keep a running total of it.
When it comes to license or rating issue you can add it to the PIC if allowed and declared that.
After you are flying commercially nobody wants to know about PICUS away from ATPL issue. if you have added it in you end up having to go back and stripping it all out later.
BTW I have zero hours logged as PICUS, when doing single pilot stuff I logged it all as dual and once multi crew if I haven't signed the tech log as PIC its been logged as co-pilot.