BNB Tax UK: Disposals, Staking and Gas Fees on BNB Chain (2026/27)
How HMRC taxes BNB in the UK — Capital Gains Tax on disposals, delegation and staking rewards as income, the gas-fee disposal trap, and why the quarterly burn isn't taxable.
BNB is one of the most widely held tokens in the UK, yet its tax treatment trips people up because BNB does three jobs at once — it is a tradeable asset, the gas token of BNB Smart Chain, and a staking asset. HMRC has a rule for each. Here is how BNB works for the 2026/27 tax year.
Disposals: Capital Gains Tax
Selling BNB for GBP, swapping it for another token on a DEX like PancakeSwap, or spending it all count as disposals. Your gain is the sale value minus your Section 104 pooled cost, after HMRC's same-day and 30-day bed-and-breakfasting rules. Net gains above the £3,000 annual exempt amount are taxed at 18% for basic-rate taxpayers and 24% for higher-rate.
The gas-fee trap
Every transaction on BNB Smart Chain is paid for in BNB. Technically, spending BNB on gas is a disposal of that fraction of BNB, so it can create a tiny gain or loss against your pool. For a handful of transactions this is immaterial, but active DeFi users making hundreds of swaps a year should track gas spend — it also counts as an allowable cost of the transaction it relates to.
Staking and delegation: income
BNB can be staked by delegating to a validator, or earned through exchange products such as Simple Earn and Launchpool. Rewards are miscellaneous income at their GBP value on the day you receive them. That value then becomes the cost basis of those coins in your Section 104 pool, so you are not taxed twice when you later sell.
The quarterly burn is not your disposal
BNB runs an "auto-burn" that permanently removes coins from total supply each quarter. This happens at the protocol level — you are not disposing of anything, so it is not a taxable event for you. It may affect BNB's market price, which flows through to your gains naturally when you eventually sell.
Records to keep
Dates, amounts and GBP values for every buy, sell, swap and reward, plus gas spend. BNB Smart Chain is EVM-compatible, so CryptoLens scans it from your 0x address alongside 28 other chains, pools your costs and produces an SA108-ready report.
This is general information, not personal tax advice.
Frequently asked questions
Is swapping BNB for another token taxable in the UK?
Yes. A crypto-to-crypto swap is a disposal of BNB for Capital Gains Tax, valued in GBP at the time of the trade, even though no pounds change hands.
Are BNB staking and Launchpool rewards taxable?
Yes. Rewards are miscellaneous income at their GBP value on receipt, and that value becomes their cost basis for a later CGT calculation when you sell.
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