UKCG - Capital Gains calculator for Trading 212, Barclays, Interactive Investor, LightYear, AJ Bell and cgtcalculator.com files

In just a matter of a just few more hours, with the help of ChatGPT and Codex, I have made a Capital Gains calculator page which accepts T212, Barclays, Interactive Investor and some other formats.

https://easy2boot.xyz/ukcg/

It has a 'Test' button if you want to try it quickly on a few trades.

It should give the same results as the cgtcalculator.com or the UK Tax calculator sites. I have tested it on T212, ii and Barclays .csv files. It also works on pasted or loaded trades text which are in the cgtcalculator.com format. I have not tested it much on the other broker formats as I don't have any current .csv download files.

This makes calculating Capital Gains much easier, especially if you use more than one broker.

How I made my 'cgtcalculator.com' converter and web apps using ChatGPT

I wanted to make a converter utility which would turn a transaction report downloaded from Trading 212 into a format suitable for cgtcalculator.com. Initially I asked ChatGPT to make it in Python, but later I asked it to make an .html page with the script inside it.

The initial development of the Python code took about half a day using ChatGPT. The next day I added the html code to my easy2boot.xyz website as a 'private' page which you can see here.

The HMRC 30-day share matching rule explained

When calculating capital gains tax, UK investors have to allow for three important HMRC rules which affect the 'cost price' of the shares that you sold. The cost price is important because it is used to calculate the gain or loss...

The gain/loss is                NET SELL PRICE   -  NET COST PRICE

Trading 212 £183k Portfolio progress update 8/05/2026

Overall I am up £8k this Saturday morning after a very good week due to good tech stock reports this week. Over 300 of the 500 companies in the S&P 500 have now reported their latest quarterly results.

Overall, I am now £43k up after 26 months of building up my accounts (£140k total deposits) and they are showing pretty good IRRs. It would be a shame to feel the effects of a market collapse now!

Invest IRR is 91% (49% last 12 months)       ISA IRR is 45% (46% last 12 months)

Save Tax! Don't use your broker's (e.g. Trading 212) annual report to report your Capital Gains Tax to HMRC!

Trading 212 have one of the best broker  platforms and they produce nice monthly and annual tax year statements. Your 2025 tax year statement should be ready now - but you should NOT actually use the Total gains/loss figure in the annual report of your Invest GIA  in your HMRC self assessment return.

For example, In my Trading 212 - Invest account, I go to Documents - Account Statements - Annual Statements and download the PDF for the 2025 tax year.  This showed me a 'Closed result' for the 2025 tax year of £2,755.

Trading 212 £174k Portfolio progress update 1/05/2026 + tips

Net deposits on Trading 212 are currently: Invest £100k and ISA 40k (only recently added 20k) so I am £34k up at the moment. Here is the result on this morning of Saturday 2 May 2026:

Invest IRR 72%    -          ISA IRR 31%

I still have £4k as cash in the ISA and £10k as cash in the Invest GIA.

I took some profits on some holdings (AMD, ARM) in the last 2 weeks.

Note: If you save £175k into a SIPP and add £200/month every month - you should easily become a millionaire in 20 years (assuming 8%/year gain of shares) - if not a lot sooner!

Current Holdings

Choosing the best Investment Platform for a GIA account (for HMRC tax reporting)

If you have used up your £20k ISA annual allowance, you may want to open a General Investment Account (GIA) and you need to be aware that these are taxable.

Choosing the right GIA platform is important because you cannot easily switch to another platform without triggering a Capital Gain and thus CGT if your gain is over £3k!

Each year you will need to consider the following points:

Trading 212 £175k Portfolio progress update 17/04/2026

This week ended with the announcement that Straights of Hormuz  would be open and so the market ended well up on Friday. However, over the weekend, we saw that the USA were still blockading the Straights and so the Iranians closed access again. It seems the stock market is very dovish at the moment (except for the oil market where oil prices were still very high - they weren't fooled by the tweets from DJT!).

Trading 212 £169k Portfolio progress update 10/04/2026

Last week I did some tax loss harvesting and sold £20ks-worth of shares in my T212 Invest GIA account and then after April 6th, I moved that £20k into the T212 ISA.

This means I now have £40k deposits in my ISA (£17k still as cash) and £100k deposits in my T212 Invest GIA account. Overall, I have slowly built up my T212 accounts to £169k with £140k of deposits over a period from Feb 2024 onwards. Some of that 140k was from my ii Invest account which I transferred across, and some was from an old AXA onshore investment bond that I partly cashed in. The investment bond had been showing a pitiful average growth of approx. 4%/yr annualised (20% tax included) but to cash it all out would have caused a large tax bill.  By investing that money myself, I have changed the IRR from 4% (or 5% if you account for the income tax they deduct) to an IRR of 60%!

If anyone has an onshore Investment bond from Prudential, Standard Life, Phoenix Wealth\AXA, etc. I strongly suggest you check their performance against say a standard UK ETF such as IUKD or a global MSCI ETF such as SWDA. You may be surprised. Most investment bonds hold at least 25% in gilts and the investment funds that they buy often have a very high annual charge (TER) of between 1% and 2% - and that is before their own annual commission charges. These bonds allow you to draw 5% of your initial deposit out tax free over 20 years (generously they don't tax the money that you put in!). Their main use is to pass on your wealth after death or for use in a trust but their performance is often so poor that you or your children would be much better off with a self-managed GIA, even if 45% tax was taken by HMRC. The IHT advantage that these bonds used to have is disappearing in 2027, so there is even less reason to use these unless you put it inside a trust.

The Iran situation seems to be bullish at the moment, so my two T212 accounts are looking much healthier this Saturday morning!

T212 Invest GIA (£100K deposited)

2026/27 UK Tax changes and how to use your UK Tax allowances

The main change for this new tax year (2026/2027) is that the Dividend Tax Rate is increasing by 2%. This means that if you have a Stocks and Shares General Investment account (GIA), then whether you have accumulating or distributing ETFs, you will still need to declare taxable income on ETFs and funds which have a non-zero ERI. The dividend tax is now 10.75% for Basic Rate taxpayers (or 35.75% or 39.35% for higher rate taxpayers).

2025/2026 Tax year Investment Review - how did I do?

After one year of actively investing and trading on Trading 212, I am now (6/4/2026) reviewing my trades and performance. Of course, my results are much worse today due to the Iran crisis and Trump's threat of genocide - last month my GIA IRR was over 50% rather than the 35% now (P.S. on 8/3/2026 my 1yr IRR is 44% just after Trumps 14-day Iran extension was announced)!

£120k Deposit - T212 Invest GIA

My strategy with the Invest GIA account was to invest in long term ETFs and shares and try not to sell them. Nevertheless, it seems I have made 91 SELL trades in the year. Some of the sells were done in order to  switch from Accumulating funds to Distributing funds, and many recent sell trades were done for tax loss harvesting and Bed-and-ISA purposes. A crystalised gain of approx. £1k on T212 was made (after tax loss harvesting) and a total gain (crystalised and uncrystalised) of £21k. My IRR for the year was 35%.

Note that I crystalised 6k of gains when I liquidated my ii invest account, so I needed to get my gains down as much as possible on the T212 invest account to minimise CGT. 

Investing in the new 2026/2027 tax year

The Iran war has now brought us a new perspective for consideration.

From a macroscopic viewpoint, the USA is energy-rich and is not dependent on the middle East for fossil fuels, unlike the rest of the world (Europe and Asia). DJT has managed to make fossil fuels twice as expensive and he will now walk away to leave us with a mess and potentially an expensive war.

Last day for Tax Loss Harvesting!

Thursday April 2nd 2026 is the last trading day of the 2025/2026 tax year in the UK.

This is the day to sell any stocks in your GIA invest account which show a loss.

Your capital gains allowance is £3k, so if you have made more gains in this tax year than £3k, it makes sense to sell those losing stocks now in order to reduce the year's total capital gains to get as near to 3k as possible.

On Tuesday April 7th you can move that cash into your ISA (up to 20k) and buy back the same shares if you wish.

If you need more cash to reach 20k, you can sell more shares to Bed-and-ISA them.

Given the volatile nature of the stock market, you might like to sell shares in your GIA only when Trump has released good news and the market is high (like today) but only buy shares in your ISA on bad news days when prices will be down.

Some people prefer to dollar cost average into their ISA.

P.S. Signup using this link for a free fractional share in Trading 212 worth up to £100 (and I will get a reward too ;-)

What to invest in now (March 2026)?

The world is once again in chaos! The USA and Israel have decided to attack Iran without considering the impact on the rest of the world. Oil/gas prices have doubled.

What this has shown is that the developed world is extremely dependant on oil and gas, especially as it has removed the use of coal in power stations. Renewable energy is not dependable, so oil and gas is still necessary for most countries.

The only other viable solution for 24x7x365 energy is nuclear power. Major countries will now start to escalate their nuclear energy programs (Australia, China, India, EU, UK, etc.). Although this will be a long term swing (5-10 years), I can envisage nuclear energy companies doing well.

Stock Tip - Sage plc seems good value to me

 Full disclosure - I hold shares in Sage (currently at a loss). I intend to sell my shares before April 5th to generate a loss for CGT purposes and then rebuy inside my ISA after April 5th and increase my holding.

As well as being undervalued, it has a good dividend yield and good future growth.

Here is ChatGPT's view on Sage.....

How I use AI for investing

AI can hallucinate (it makes stuff) and can lie, however it can be very useful to get some ideas on investing.

Many analysts reduce the current global economic cycle to four big forces:

Trumps latest tariffs - what shares am I buying now?

DJTs latest petulant fit of pique seems to be the final nail in the coffin for non-USA investors. It seems that Europe do not want to depend on the USA for goods and services any more, and many large, unfinalised USA contracts are now on hold or even cancelled.

In particular, very large European defence contracts and energy contracts with the USA are in jeopardy.

This gives an even greater boost to EU and UK defence companies and also to large Emerging Markets companies, especially those in Korea and China.

T212 Trading £157k update 2026-02-20

I have not made many changes in my Trading 212 ISA or Investment accounts in the last month except for the selling of my FTSE RAFI PSRU ETF shares as the ETF was closing down.

I am trying to diversify my holdings but still select countries and sectors which I think will do well in 2026.

Trading in March 2026?

I suspect there will be large swings in the stock markets in March 2026.

We should be ready for them, either to sell or buy. Perhaps even look for leveraged ETFs?

The Swiss Franc, EU Euro and UK Pound are stronger gold currencies than the US Dollar...

The GBP/USD rate has shown the USD has dropped in value all February...

Now is the time to think about Tax Loss Harvesting!

If you live in the UK you will be aware that April 5th 2026 is the end of the tax year. Since it is a Sunday, Friday April 3rd 2026 is the last trading day.

If you have investments in a General Investment Account (GIA) such as a Trading 212 Invest account, you should be thinking about Tax Loss Harvesting (TLH) now.

If you want more details on what TLH is, I suggest you ask ChatGPT about Tax Loss Harvesting in the UK (but don't believe all it tells you!), but here is what I am currently considering.

If you have a GIA, then you probably have already maxed out your ISA(s) with the full £20k allowance.

So we now have to think about:

My favourite FTSE ETF (PSRU) is about to close!

Yep, one of the best FTSE ETFs, in my opinion, was and is PSRU but it is sadly, closing very soon.

A free tool for Trading 212 UK Capital Gains Tax calculation!

If you have a Trading 212 Invest account, you will probably need to calculate your Capital Gains tax after May 6th 2026.

Note that the annual report from Trading 212 does not account for the HMRC 30-day rule or the same day rule to determine which shares have been sold. Any sell is first matched against...

1. Shares bought and sold on the same day
2. Shares acquired within the 30 days after the sale (on a ‘first in, first out’ basis)
3. The Section 104 holding pool (any other of the same type of shares: total paid / qty)

I have made a Windows executable that converts the .CSV files which you can download from Trading 212. A web page is also now available so no utility is needed.

On the T212 site, select your Invest account and then use:

'Trading 212 - History' 

and my program will convert your downloaded .csv file into a suitable text file (.txt) which you can then load into the free cgtcalculator.com online app. 

The steps are:

A good month for silver, gold, copper and miners (but not for SMRs)!

 I hold the following stocks and ETFs listed in the table below in my Trading 212 accounts.

The current price change (last column) is calculated using the average price over approx. 30 days.

Invest in Pawn (gold)?

On 19th September 2025 I wrote a blog article 'Is Pawn good for you?'.

In that article I suggested that we take a look at FirstCash FCFS and Ramsdens RFX.

A free and viable alternative to the UK's Net Zero policy

If the UK became a CO2 Net Zero energy country, it will cost us many £Trillions and quosh all our industries - this policy is making the UK one of the most expensive countries in the world to live in.

We could insulate our houses better and save approx. 5% of CO2 emissions (much cheaper than buying a BEV). Eating 10% less meat would save 2% and 20% less waste food would also save 2%.

So we could reduce our emissions by at least 15% simply by insulating our houses better (and short payback period), wasting less food and eating less meat (e.g. eat pulses one day a week instead of eating a bit of a cow).

What if all developed world countries did this?

I asked CoPilot...

Trading 212 £158k update 2026-01-16 + tips

Another good week and I am at an all-time high :-) Over my two accounts (£130k mainly DCA deposits, I am up £26k in 12 months = 20% unrealised gain).

I don't expect this to last however and still have £6k of cash ready for when the correction comes!

T212 Invest (£110k Deposit - 72% IRR)

This was up £2.6k (2%) over the week.

Company Stock picks for 2026

This list below comprises medium to long-term companies which are picked for a UK investor's 2026 portfolio.

The list was shared by the YouTube investor channel 'ISA Investment UK' who has built up his impressive portfolio from £422k to £1600k in just one year. Although he has used options quite a bit - he has over £300k in ETFs, £50k in crypto, £200 in options and £230k in cash - the rest (£800k) is invested in the following companies...

Trading 212 £154k update 2026-01-09 + lessons learned in 2025

I have not reported my Trading 212 account progress for a few weeks as there was not much to report, so here is the 2026 New Year's update which is nicely up!

Trading 212 ISA (20K deposited on April 2025)

I use this account as my more shorter term trading, adventurous account.

Ideas for Finance and Value ETFs in 2026

The US economy and US dollar seem set to improve in 2026. Trump is calling for swingeing cuts in the Fed interest rate. This should be better for US stocks. US banks and credit card companies have not performed particularly well in 2025 for UK investors, partly because of the  USD/GBP Fx rate but this should change in 2026. The GBP\USD Fx rate should not change so much over 2026.

Investments for 2026 - it's a gas!

Data Centers require large amounts of electricity and the fuel needs to be clean and immediately available. Nuclear energy is the long term answer but that is still 6-10 years away and data centers need electricity now! The answer lies in building modular large scale natural gas generators.

Urgent - The value of Silver is exploding!

The spot price of silver seems to be rocketing in the last few days.

You can invest in physical silver or buy a physical silver fund (e.g. SLVP or SSLN) or buy a x2 or x3 leveraged ETF (e.g. £3SLV or $SLV3). 3SLV is up 150% in just one month. There is also the possibility of buying a Euro hedged fund such as OXA2.

My top ETFs for a 2026 UK investor's portfolio

The ETFs below are my current top favourites for a 2026 general investment portfolio for a UK investor.

My core ETFs as a UK-based (GBP) investor would be PSRU(dist.) FTSE UK and PSRW(dist.) FTSE All world. Value stocks should do well, so IWVG(dist.) is another 'safe' horse being an All World Value ETF which has shown good performance.

Note: IUKD is an alternative to PSRU if it is no longer available.

Trading 212 update 2025-12-19 + tips for 2026

A bit of a scary week, down all week and then a strong recovery on Friday. 

In this blog, I also explain some of my investment plans for 2026.

T212 ISA

My 20K ISA (opened April 2025) is looking better thanks to Friday...

FTSE, S&P 500 or NASDAQ 100 - which performed better over the last 1 and 5 years - you will be surprised!

and the winner is.... the FTSE RAFI ETF PSRU...

Here is a 5-year chart with some other popular ETFs for comparison...

Free eBook on Investing!

I just got a five star rating for my free eBook 'Start Investing Now!' which was nice.

If you found this blog article by accident and wondered if you should start investing (the sooner the better) then this book is for you - and it's FREE!

See my Payhip store page at https://payhip.com/SteveSi to get the free PDF download.

Note: If you like my free eBooks and find the content useful, you can always download another copy and pay whatever you want for it to buy me a coffee ;-)

Steve

If you would like to buy a more detailed book on investing for UK investors, please leave a comment. The new eBook will be only $5 and contain investing tips, trends, tax traps, mistakes (gotchas), etc. There will be no analysis expertise required - the aim is to outline how a typical, young (early 20's) UK worker can become a multimillionaire by the time they retire through sensible spending and slow and steady investing, taking full advantage of the UK tax system.

Best Mining shares for UK investors

Over the last 1, 3 and 6 months, mining ETFs and value ETFs have been performing well.

GIGB (acc) looks very good to me, or if you have a GIA account, then you maye prefer DMAD (dist.) although the fund size of DMAD seems very small it seems to have performed very well. Distributing mining ETFs seems to be quite rare.

Top ETFs in 2025 and JustETF.com guides

 Justetf.com have issued a number of comparison guides for 2025 results.

For UK tax payers, you will probably want an accumulating ETF inside your ISAs and SIPPs, but distributing ETFs inside a GIA account (e.g. Trading 212 Invest account) because this saves having to work out the ERI on all of your accumulating ETFs).

Note that these Justetf guides may not include hedged ETFs and may be filtered (not aimed at UK investors). For instance, compare a hedged S&P 500 with the best unhedged ETF for 2025

For 2026, I am using unhedged USA ETFs however.

Trading 212 update 2025-12-12 - it was all going so well until Friday!

Friday 12/12 started so well, but then it all went downhill in the afternoon, leaving me substantially down by 3% from last week.

T212 ISA

T212 Invest GIA

Tickers most affected by Friday's dip (GIA)

Tickers most affected by Friday's dip (ISA)

I think Tech is going to be very 'wobbly' and volatile next year. My current portfolio is Tech heavy at the moment but I am now interested in buying more commodity stocks.

My plan for 2026

I asked ChatGPT for the best energy tariff

I asked ChatGPT 

'If my electricity is 25.88p per unit and the standing charge is 43.66p for Tariff 1, and Tariff 2 is 24.96p per unit and standing charge is 62.22p, what would my usage need to be in kWhours for my bill to be the same under either tariff?'

It replied 'The usage needs to be approximately 20.17 kWh for the bill to be the same under either tariff.'

From the answer, it seems that one tariff would always be cheaper than the other as long as my usage was 20kWh or more which is easily surpassed as I use about 2000 kWh annually.

So I then asked:

'What would my bill be for one year of 2000 kWh of use under both tariffs?'

and got the reply:

Under Tariff 1, the annual bill would be approximately £676.96 (67695.9p), and under Tariff 2, it would be approximately £726.30 (72630.3p), assuming the standing charges are applied daily.

Simples! 

So I changed my Octopus electricity Tariff to the cheaper 12m fixed tariff since my annual usage will always be greater than a measly 20kWh!

Before I got a cheap Air Fryer (#Amazon ad), I used to put my small cooker oven on every day and my electric energy bill was over £900/yr, so the Air Fryer has easily paid for itself in just one year of use. If your loved ones don't have one already, why not buy them one for Christmas - they save electricity (esp. when you pre-microwave the veggies first in a small amount of water) and improve your diet because you can eat fresh food every day without needing to stand over the hob for ages.

Tip: If you or your relatives already have an Air Fryer, then these disposable paper liners (#ad) make a great gift - they save wear and tear on the caddy's non-stick surfaces and saves washing up! If you like them, you can get them cheaper from Ali Express.

If you have an elderly relative, an electric throw blanket makes a great Xmas gift. It saves energy bills and keeps them nice and warm all evening. Tip: Buy a dark colour as you won't need to wash it so often.

New! - How to check if a firm is a scam

The Financial Conduct Authority (fca.org.uk) have a new facility (Dec. 2025) on their website called Firm Checker.

If you want to check if a firm is legitimate and what it is legally allowed to do, then this will tell you.

It will also alert you to known 'clone' firms (firms of a similar name or firms pretending to be the real firm).

If you or a relative has been contacted by a firm offering you a 'deal', you should be able to check them out.

Tip: Clone firms are often hard to spot. The number that you are called by can be spoofed. You should find the firms website using a search engine, check that the site looks genuine (e.g. test out all links and pages) and then contact that firm using their email contact address and phone number and ask if the person who contacted you is actually an employee.

Alway pay by credit card (not debit card) even if only part payment is made.

Make an Excel spreadsheet to fetch and compare today's stock prices with the 30-day average

I asked the Claude AI to make an Excel macro that would get the current stock price and compare it with a 30 day average price and show me the changes in coloured cells (light or dark green and red). 

Here is what I got:

Trading 212 update 2025-12-05

My ISA and GIA portfolios gained a bit this week (£100+£1k). I have started to sell some of my smaller holdings (<£50) and also sold Regeneron Pharmaceuticals (triggered by a Stop Loss limit) for a profit. My main sell inside my ISA was of Sylvania Platinum which made a very small loss (it did not seem to be moving much over the last 2 months). I rebought Greatland Resources GGP in my ISA (£500 worth - currently 2% up).

I sold Regeneron Pharmaceuticals for a 10% profit!

I tipped and bought Regeneron in early November and in total bought £2k. I sold it on the 27th November for a £223 and 11% profit as the price started to drop and I had set a stop loss limit and so was stopped out.

Is Greatland Resources rebounding?

I bought GreatLand GGP at the end of September 2025 and sold in October for a quick 10% profit when it started to dip. It is a gold and copper miner.

I hung on to a small fraction however (about £20) so that I could easily track it in my Trading 212 ISA.

Trading 212 Update 2025-11-28 + Tips

My two Trading 212 accounts have recovered a lot this week and I am almost back up to the all-time highs of October. The contents of my portfolios are shown below:

£100K Invest GIA

Rolls Royce SMRs to be built in Wylfa Anglesey - not USA SMRs!

Although RR was the UK's preferred bidder, we had promised President Trump that the UK would invest in proven USA SMRs. It appears Mr Trump is pretty upset about it!

Tip - MBX Biosciences may be worth a look?

MBR has gone up over 100% recently and there has also been some insider buying. It has a target price of approx $60 and so seems undervalued.

Tip - buy Eli Lilly and/or Novo Nordisk?

About a month ago I invested in Eli Lilly and Novo Nordisk mainly because I think the weight loss drug market is exploding internationally.

EBooks sale now on (15-25% off)!

I have a special Black Friday sale on my eBooks on now (15% discount). Extra discount if you buy more than one. I'm almost giving them away.

Become an expert in Ventoy, E2B, grub4dos, USB booting, etc. My eBooks have an average 4.5 star rating. Some are free!

Click on the eBooks store link to get a bargain 😁 

Trading 212 Update 2025-11-21 + tips

Not a good week!