How to calculate Capital Gains on shares?

How to calculate Capital Gains on shares?

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2Btoo

Original Poster:

3,629 posts

217 months

Wednesday
quotequote all
Guys,

A Q about how to calculate Capital Gains (CG) on share purchases.

Imagine I buy 10 shares in a company for a given amount - perhaps £10/share. Total £100.

I later buy another 20 shares at £15/share in the same company. This is another £300, so total £400 paid for the shares.

Later again, I sell 10 of these shares for £20 each. What is the gain that I have made on those 10? Is it deemed that I have sold from the second batch of shares that I bought, meaning that the gain is £50? Or have I sold from the first batch of shares, meaning the gain is £100?

Does it make a difference if they have been purchased through the same broker, or different brokers? (In practice they are all through the same broker, but this question is for curiosity).

ALSO, what if I ALSO buy some shares in another company and sell them at a loss, within the same tax period as I sold the shares in the first company (mentioned above). Can I offset the loss on the shares in the second company against the profit made on the shares from the first company.

Thanks!


C69

788 posts

26 months

Wednesday
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In most cases you use the average purchase cost, as per this: https://www.gov.uk/tax-sell-shares/same-company

If you've got two separate transactions with one making a profit and one making a loss, then the latter should be able to offset the former.

CharlesElliott

2,177 posts

296 months

Wednesday
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It's called a Section 104 holding, and it means that every share is valued at the average purchase price. There are exceptions for buy / sells on the same day or within 30 days.

CharlesElliott

2,177 posts

296 months

Wednesday
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And yes, you can offset your losses against the profit.

alscar

6,209 posts

227 months

Wednesday
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And if your losses in one tax year exceed your profits for CGT purposes you can also then carry forward said loss to the next tax year.

Panamax

6,022 posts

48 months

Wednesday
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The underlying message is that to keep your CGT position simple it's best to buy holdings once and once only, otherwise the averaging process can distort your overall picture if/when you want to realise some gains/cash.

In the world of Funds this is generally easy to achieve as there are so many different funds which are fundamentally similar.

If it's CGT on funds, particularly Acc funds, don't forget that accumulted taxed dividends increase your "cost" and any equalisation received decreases your "cost".

Holdings of Inc units with "income reivested" can be particularly awkward in CGT calculations. Best avoided IMO.

Another nuance: Switching between Inc and Acc units (or vice versa) of the same fund is NOT a disposal forCGT purposes.

Mr Pointy

12,470 posts

173 months

Wednesday
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Panamax said:
Another nuance: Switching between Inc and Acc units (or vice versa) of the same fund is NOT a disposal forCGT purposes.
Is that so? I didn't know that & have held off switching some of the funds in my GIA to avoid triggering CGT.

ferret50

2,172 posts

23 months

Wednesday
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Keep them in a shocks and stares ISA, zero tax on exit.

Simples

Mr Pointy

12,470 posts

173 months

Wednesday
quotequote all
ferret50 said:
Keep them in a shocks and stares ISA, zero tax on exit.

Simples
My ISA is fully contributed. The GIA is holding the excess I can't get into the ISA.

NowWatchThisDrive

965 posts

118 months

Thursday
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Panamax said:
The underlying message is that to keep your CGT position simple it's best to buy holdings once and once only, otherwise the averaging process can distort your overall picture if/when you want to realise some gains/cash.
I wouldn't go that far, the rules might be a little unintuitive at first but it's not rocket science. You can track it easily enough in a spreadsheet, or there are websites like http://www.cgtcalculator.com (don't use it myself but it seems pretty accurate and I've seen it recommended plenty) that take in all your transactions line-by-line and spit out all the calculations.

CambsBill

2,197 posts

192 months

Thursday
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Panamax said:
The underlying message is that to keep your CGT position simple it's best to buy holdings once and once only, otherwise the averaging process can distort your overall picture if/when you want to realise some gains/cash.
All well & good until you tick the box that says "reinvest dividends". Does the averaging rule still apply to any sales then?

Mr Pointy

12,470 posts

173 months

Thursday
quotequote all
NowWatchThisDrive said:
Panamax said:
The underlying message is that to keep your CGT position simple it's best to buy holdings once and once only, otherwise the averaging process can distort your overall picture if/when you want to realise some gains/cash.
I wouldn't go that far, the rules might be a little unintuitive at first but it's not rocket science. You can track it easily enough in a spreadsheet, or there are websites like http://www.cgtcalculator.com (don't use it myself but it seems pretty accurate and I've seen it recommended plenty) that take in all your transactions line-by-line and spit out all the calculations.
It can very messy very quickly. Try tracking the CGT implications of selling shares from the utilities selloffs in the late 90s (if you see Sid, tell him). You ended up with shares in Centrica. Lattice, Aviva, Scottish Hydro, Southern Electric, SSE, National Grid, Shell A, Shell B, then just Shell plus others & then add in shares issued if you elected for DRIP schemes. You end up just estimating it & hoping HMRC don't ask to see the calculations.

NowWatchThisDrive

965 posts

118 months

Thursday
quotequote all
Ha, the privatisations were a bit before my time so never had any, but I still don't think it's that hard. The process/maths is fine once you get the hang of it, the big requirement is just comprehensive record-keeping which is much easier nowadays with everything online than when you had paper share certificates etc. I've been doing it all myself in spreadsheets for 25yrs now - with thousands of individual transactions, divi reinvestments etc across nearly 100 companies - and never had any issues or been pulled up on anything.

Panamax

6,022 posts

48 months

Thursday
quotequote all
CambsBill said:
All well & good until you tick the box that says "reinvest dividends". Does the averaging rule still apply to any sales then?
Yes, the averaging rule applies - which is why my previous post strongly suggested that ticking the "reinvest dividends" box can be a bad idea for holdings in a general investment account. Unless you enjoy very detailed administration.

Even with Acc units you need to keep track of taxable dividends to avoid over-paying CGT. The annual tax free allowance is now so low that many more people find themselves with CGT liability. The old trick of using your CGT allowance to fund your £20k ISA each year is now pretty much toast.

IMO the smooth move in GIA is to buy Income units, receive the cash dividends and then from time to time buy a stand-alone investment which can in due course have its own simple calculations.

In a world where many things are possible I tend to favour the simplest solution.

Panamax

6,022 posts

48 months

Thursday
quotequote all
NowWatchThisDrive said:
never had any issues or been pulled up on anything.
CGT is a very hard tax for HMRC to police, especially where detailed holdings are concerned. They're much happier raping BTL landlords and second home owners under the "report and pay" regime where their big computer in the sky can easily keep an eye on things via SDLT returns and so on.

The best they can usually do is random review of a few submitted CGT returns, and even if they find a wobble the chances of a cost-effective outcome are pretty small unless someone's seriously been taking the proverbial. I suspect the bigger enforcement question is whether things get reported at all rather than whether the calculations are 100% correct.

xeny

4,948 posts

92 months

Panamax said:
Yes, the averaging rule applies - which is why my previous post strongly suggested that ticking the "reinvest dividends" box can be a bad idea for holdings in a general investment account. Unless you enjoy very detailed administration.

Even with Acc units you need to keep track of taxable dividends to avoid over-paying CGT. The annual tax free allowance is now so low that many more people find themselves with CGT liability. The old trick of using your CGT allowance to fund your £20k ISA each year is now pretty much toast.

IMO the smooth move in GIA is to buy Income units, receive the cash dividends and then from time to time buy a stand-alone investment which can in due course have its own simple calculations.

In a world where many things are possible I tend to favour the simplest solution.
Any online broker I have used has reported an averaged purchase price when I've made multiple dividend reinvestments, so I haven't found admin for dividend reinvested Income units so bad.

Holding Acc units in a GIA is my personal idea of hell, Inc units every time.

I still aim to harvest 3K of CGT allowance each year. Sometimes I have to sell more than £20K to do so, sometimes I sell far less, but it's at least reducing the future tax liability.