Stablecoin Tax UK: How USDT and USDC Are Taxed (2026/27)

Under the rules that apply today, stablecoins such as USDT and USDC are taxed like any other crypto: selling, swapping or spending one is a disposal for Capital Gains Tax, and interest you earn on one is income. Because a stablecoin stays close to £1 or $1, the gain or loss on the stablecoin itself is usually a few pounds, but swapping into one from bitcoin or ether can trigger a large gain on the bitcoin or ether. HMRC's draft rules of 13 July 2026 would exempt eligible stablecoins from Capital Gains Tax from 6 April 2027. They are not law yet and change nothing for 2025/26 or 2026/27.

Are stablecoins taxable in the UK today?

Yes. HMRC's Cryptoassets Manual (CRYPTO22550) says HMRC does not consider cryptoassets to be currency or money, so the special exemptions for foreign currency do not apply. A disposal, as CRYPTO22100 explains, includes exchanging tokens for a different type of token and using tokens to pay for goods or services. That covers a stablecoin as much as bitcoin. Each stablecoin also has its own section 104 pool, like any token, so you need the cost of what you bought.

Is swapping bitcoin for a stablecoin taxable?

Yes, and this is where the real tax sits. The disposal is of the bitcoin, at the sterling value of the stablecoin you receive.

Worked example. On 15 January 2026 you buy 0.5 BTC for £10,000. On 20 February 2026 you swap the 0.5 BTC for 15,000 USDT worth £15,000, to "park" your profit.

• Proceeds £15,000, allowable cost £10,000: a £5,000 gain in 2025/26.
• After the £3,000 allowance, £2,000 is taxable. With £20,000 of taxable income it is taxed at 18%: £360.
• Your 15,000 USDT now has a pool cost of £15,000.

Moving into a stablecoin does not pause the tax. The gain is fixed on the day of the swap, and it is due for 2025/26 by 31 January 2027. See when you pay tax on crypto.

Is selling a stablecoin for pounds taxable?

Yes, although the numbers are small. Continuing the example: on 12 August 2026 you sell the 15,000 USDT for £14,970 because the price had slipped a little. Export instructions for the exchanges most people use for stablecoin trades are in our Binance and Coinbase guides.

• Proceeds £14,970, cost £15,000: a £30 loss in 2026/27.

That £30 needs a sterling value and an entry in your computation, and it is a disposal to count on the SA108 for 2026/27. Someone who trades in and out of stablecoins daily can have hundreds of these tiny disposals, which is much of the administrative burden the draft rules aim to remove. Our calculator values each one on its UK date and applies the same-day, 30-day and pool rules; see how to report crypto on your tax return.

Is stablecoin interest taxable?

Yes. GOV.UK's guidance on receiving cryptoassets says tokens received from activities such as mining, staking or lending count as income, including from DeFi. Interest-like returns on stablecoins are therefore income when you receive them, valued in pounds at that date. Our staking, mining and airdrops guide explains the valuation, the £1,000 trading allowance and how the later disposal works.

What would the July 2026 draft rules change?

HMRC's policy paper says the measure "will treat eligible stablecoins more like money for tax purposes". For individuals and trustees, from 6 April 2027:

Three details from the draft legislation are easy to miss:

• Existing holdings get a deemed disposal. The draft treats you as having disposed of eligible stablecoins you hold immediately before 6 April 2027 and reacquired them at market value, with any gain or loss treated as arising on 6 April 2027. For a pegged coin it is likely to be small, but it is worth knowing.
• Eligible and other tokens are pooled separately. The draft treats eligible stablecoins as a different class from any tokens that are not eligible, even of the same type.
• The definition matters. An "eligible stablecoin" must be backed by sufficient currency or other assets, designed for payment or settlement, and widely available with an active market. The definition may be refined in the final law.

Nothing in the draft changes the tax on the other side of a swap: if you sell bitcoin into a stablecoin, the bitcoin gain is taxable at 18% or 24% as before.

What should you do now?

• Keep computing stablecoin disposals for 2025/26 and 2026/27. The current rules apply until 5 April 2027, and HMRC expects a computation. See crypto tax rates and allowances for 2026/27.
• Keep records of your stablecoin purchases. You will need the pool cost for the deemed disposal if the draft is enacted as published, and for any earlier years.
• Do not assume the draft applies early. It does not change 2025/26 or earlier years, so a return due 31 January 2027 uses the current rules. If HMRC has written to you about earlier years, use the HMRC letter helper.

What about DeFi lending and liquidity pools?

The same July 2026 announcement includes draft "no gain, no loss" rules for qualifying crypto lending and liquidity pool deposits from 6 April 2027. Those are separate from the stablecoin measure; see our staking and DeFi guide for how they work today and what the draft would change.

Sources

• Taxation of stablecoins (policy paper) — GOV.UK
• Tax treatment of stablecoins: draft legislation — GOV.UK
• Taxation of stablecoins: summary of responses — GOV.UK
• CRYPTO22100 — What is a disposal — HMRC Cryptoassets Manual
• CRYPTO22550 — Currency — HMRC Cryptoassets Manual
• Check if you need to pay tax when you sell cryptoassets — GOV.UK
• Check if you need to pay tax when you receive cryptoassets — GOV.UK