About portfolio and taxes

General
1

I’m reading that capital gain generated by the selling of a portfolio (not ISA/SIPP) is counted using FIFO (First in First out) in the context of taxation.

This translates, as I understand into something e.g. like this:

1st Jan - I invest £ 1000
1st Feb - I invest £ 1000
1st March - At this point my portfolio is worth say £ 2100
I could withdraw £ 2000 tax free, as this was the initial investment.

However, if I mix and match investments and return (like the an old portfolio I own for a decade) the situation becomes blurry. Because it will have a stack of Investment/return/investment/return/investment/etc

Is there any way I can predict the tax due planning to sell “a” given amount from my portfolio? Something that would take into account the FIFO approach and any interest in between?

Thanks

2

Gordon Brown replaced the FIFO with “section 104” investment pool. All the shares in the Section 104 holding are regarded as indistinguishable; there is no matching after holding 30 days. It is your responsibilty to maintain pool records. I suggest you Look “section 104” up on the HMRC website.