If this is for your self assessment tax returns you should have a filed returns for 2017-18 and 2018-19 already. Going by the information you stated it might be far better for you to use all crypto related profit/loss in one place using one transaction rather than spreading it out for all fiat to crypto and crypto to fiat trades.
Quite simply, tally up everything you sent and received in those 200 fiat to crypto trades in EURO, calculate whether you made a profit or a loss. If you made a loss then that is that but if you made a profit you can use the EURO figure with an average exchange rate to get your GBP final profit/loss figure. You can also go a step further by looking at exchange rates from EURO/GBP and GBP/EURO for each transaction to get a very accurate figure otherwise simply go with an average figure.
As long as your crypto and not been converted to fiat and is sitting in a wallet you do not have to calculate any tax for them but the moment they are converted to fiat you must declare it.
Quite simply, tally up everything you sent and received in those 200 fiat to crypto trades in EURO, calculate whether you made a profit or a loss. If you made a loss then that is that but if you made a profit you can use the EURO figure with an average exchange rate to get your GBP final profit/loss figure. You can also go a step further by looking at exchange rates from EURO/GBP and GBP/EURO for each transaction to get a very accurate figure otherwise simply go with an average figure.
As long as your crypto and not been converted to fiat and is sitting in a wallet you do not have to calculate any tax for them but the moment they are converted to fiat you must declare it.
Sorry but that is not correct. HMRC does not care if you trade fiat to crypto or crypto to crypto, if you made a gain of more than the 12k allowance you have to pay capital gains tax. Even if you just traded crypto to crypto and did not cash out to Fiat!
i have my calculations for the past 3 tax years in EUR in cointracking and only one of them has a profit which is within the 12k CGT allowance, so there was nothing to declare so far. But i am asking as i expect to cash out more in the next bull cycle and it will be probably over the allowance.
