23/06/2026
๐ ๐ญ๐ซ๐๐๐ ๐ข๐ฌ ๐ ๐๐ข๐ฌ๐ฉ๐จ๐ฌ๐๐ฅ. ๐๐๐โ๐๐๐ ๐๐จ๐ฎ๐ง๐ญ๐ฌ ๐๐จ๐ซ ๐ ๐จ๐ฏ๐๐ซ๐ง๐ฆ๐๐ง๐ญ ๐ญ๐๐ฑ.
You swap ETH for BTC on an exchange. You never convert to GBP. You think no tax event happened. You're wrong.
This is one of the biggest compliance gaps in UK crypto. Most traders think capital gains tax only applies when you sell crypto for fiat currency. When you convert to GBP, you pay tax. Until then, you are fine.
HMRC disagrees. Every crypto-to-crypto trade is a disposal event.
ETHโBTC is a disposal of ETH.
ETHโUSDC is a disposal of ETH.
ETHโDOGE is a disposal of ETH.
Each one triggers capital gains tax.
The calculation: you sold ETH at its fair market value in GBP on that day. You had a capital gain or loss. You owe tax on the gain. No fiat conversion required.
Most UK traders don't report this. They only report when they finally exit to GBP. When they do HMRC's audit and discover all the unreported trades the penalties multiply.
โ Every crypto-to-crypto trade = a disposal event
โ Taxed on the GBP value on the day of the trade
โ Capital gains tax applies whether or not you converted to fiat
โ Missing these trades = severe penalties when discovered
โ Your cost basis for future trades starts at that FMV
Imagine you did 50 trades between coins last year and reported none of them. HMRC will see every single one on the blockchain. You owe tax on 50 disposal events. Back taxes. Interest. Penalties.
If you've been actively trading between coins, you need to get your records in order now.
๐ Call Crypto Accountants: 0208 638 5800
๐ Visit: www.cryptoaccountants.live
๐ Free Crypto Accountants consultation: https://calendly.com/umer-cryptoaccountants/30min