In the UK, HMRC usually treats memecoin trading as a Capital Gains Tax matter, and every swap counts as a disposal, including swapping a memecoin for SOL or SOL for a memecoin. You work out the gain or loss on each one in pounds sterling. If your total gains for the tax year are above the tax-free allowance (£3,000 for 2026 to 2027), you need to report them and pay tax.
This page explains the general rules at the time of writing (October 2026). It is not personal tax advice. If your situation is complicated or the sums are large, speak to an accountant or tax adviser who understands cryptoassets.
Why every swap is a taxable event
HMRC's guidance lists these as disposals of cryptoassets:
- selling tokens for money
- exchanging one type of token for a different type
- using tokens to pay for goods or services
- giving tokens away (except to a spouse, civil partner or charity)
The second point is the one that catches memecoin traders. When you buy a memecoin with SOL, you are disposing of SOL. When you sell that memecoin back to SOL, you are disposing of the memecoin. You never touched pounds, but both trades can create a gain or loss.
Moving tokens between wallets you own is not a disposal.
Key point: An active memecoin trader can make hundreds of disposals a year without ever cashing out to a bank. Each one needs a sterling value.
How the gain is worked out
For each disposal, the gain is roughly what you received (in pounds, at the time) minus what the tokens cost you (in pounds, at the time you got them), minus allowable costs.
Allowable costs include transaction fees. So the swap fees you pay on Jupiter, pump.fun or elsewhere can usually be deducted.
Pooling and the 30-day rule
HMRC does not let you pick which tokens you sold. Instead:
- Tokens of the same type go into a pool, with an average cost.
- When you sell some, you deduct a matching share of the pool's cost.
- Exception: tokens bought on the same day as a sale, or within 30 days after it, are matched to that sale first instead of using the pool.
HMRC's own example: you buy 100 tokens for £200 and later 300 for £300. Your pool is 400 tokens costing £500, an average of £1.25 each. Sell 200 and the cost you deduct is £250.
For memecoins you buy and sell within a day, the same-day rule often applies.
Rates and allowance
At the time of writing, the figures from GOV.UK for the 2026 to 2027 tax year (6 April 2026 to 5 April 2027) are:
| Amount | |
|---|---|
| Tax-free allowance (annual exempt amount) | £3,000 |
| Rate on gains within the basic rate band | 18% |
| Rate on gains above it | 24% |
Your gains are added on top of your taxable income. Whatever part of the basic rate band (£37,700 for 2026 to 2027) your income has not used is taxed at 18%, and the rest at 24%.
The allowance applies to all your capital gains together, not to each token.
Losses, including coins that rugged
Most memecoins lose money, and losses are useful for tax:
- Losses are set against gains in the same tax year first.
- Unused losses can be carried forward to future years.
- You must report a loss to HMRC to use it, and you can claim up to 4 years after the end of the tax year in which you made it.
If a coin rugs and you still hold tokens no one will buy, you have not sold them, so there is no disposal yet. HMRC's Cryptoassets Manual explains that you can make a negligible value claim on tokens that have become worthless. This treats them as sold and bought back at the value you state (which can be nil), creating a loss you can report. Because of pooling, the claim covers your whole holding of that token.
When you need to report
You generally need to report if your gains for the tax year are above the £3,000 allowance. You can use a Self Assessment tax return, which now has a dedicated cryptoasset section, or HMRC's real time Capital Gains Tax service.
If you are already registered for Self Assessment, GOV.UK says you also need to report gains on your return if your total sale proceeds were more than £50,000, even if your gains are below the allowance. With frequent memecoin swaps, total proceeds can pass that figure much faster than people expect, because every swap counts as proceeds.
If you have unpaid tax on crypto from earlier years, HMRC runs a Cryptoasset Disclosure Service.
Could it be income instead?
HMRC's view is that most individuals who buy and sell crypto are investing, so Capital Gains Tax applies. Only in unusual cases, where the activity looks like a business, would it be treated as trading income instead. If you trade at very high volume as your main activity, take professional advice.
CARF: what UK platforms now tell HMRC
The Cryptoasset Reporting Framework (CARF) is an international system for sharing crypto information with tax authorities. In the UK, cryptoasset service providers have had to collect details of their users and their transactions since 1 January 2026. Their first reports to HMRC, covering 2026, are due between 1 January and 31 May 2027. Reports cover users who are tax resident in the UK, as well as other participating countries.
In practice, if you buy SOL on a UK exchange and send it to your own wallet to trade memecoins, HMRC is likely to see that money moving. It will not see your cost or your gain. Trades made from your own wallet on decentralised exchanges still count for tax whether or not anyone reports them.
Records to keep
HMRC says it may ask to see your records in a compliance check. Exchange statements are not tax calculations and do not track your pooled costs, so you must keep your own records. For each transaction, keep:
- the type of token
- the date of the disposal
- how many tokens you disposed of
- how many you have left
- the value in pounds sterling
- bank statements
- your pooled costs before and after the disposal
Memecoin traders can make so many trades that doing this by hand is impractical. Many use crypto tax software that reads wallet addresses and calculates gains under UK rules. Check the output, because these tools can misread unusual transactions. Your wallet history and Jupiter's activity export are useful starting points.
Related
- Taking profits: getting your stake back out
- How memecoin trading actually works (and why most people lose)
- What is a rug pull?
- What is Jupiter, the Solana exchange?