Budget 2026, delivered on 28 October, carried three cryptoasset measures. None bites before 2027, and none changes a line of the return due on 31 January 2027, ninety days away.
The measures are real, and two are good news. They simply arrive after the problem in front of you.
What actually changed
Eligible stablecoins become exempt from capital gains tax. The draft defines one as a cryptoasset backed to hold a stable value against a currency, designed as a means of payment, and widely available. Disposals stop being chargeable from 6 April 2027 for individuals and trustees, 1 April 2027 for companies. Spending a stablecoin stops being a taxable event.
Cryptoasset loans and liquidity pools get no-gain-no-loss treatment. Putting tokens into a qualifying lending arrangement or an automated market maker stops being a disposal from 6 April 2027, and the gain defers until you dispose of something. HMRC estimates this affects about 700,000 people. Individuals and trustees only; companies are excluded.
The third measure is the one to read twice. The Financial Institution Notice is being extended to cryptoasset service providers from the date of Royal Assent. Schedule 36 bars a third-party notice without the taxpayer’s agreement or the tribunal’s approval. Paragraph 4A requires neither, and the appeal rights at paragraphs 29 to 31 do not cover it. Today HMRC must go to a tribunal or ask you before compelling your exchange’s records. After Royal Assent it will not.
No consent, no tribunal, no appeal. The notice names you, and you get a copy unless the tribunal agrees you need not.
What did not change
The annual exempt amount stays at £3,000, a third consecutive year, and is confirmed for a fourth through 2027/28. Capital gains rates stay at 18 and 24 per cent, switching at £37,700 of taxable income. The personal allowance stays at £12,570. The Budget’s words are “no increase to the headline rates of income tax, National Insurance contributions, or VAT” — note “headline”, because savings rates rise to 24, 44 and 49 per cent from 6 April 2027. Stablecoin interest-like returns become savings income on that same date, so the reform that exempts the capital makes the yield dearer.
The trap that is already live
Section 8C of the Taxes Management Act 1970 lets you skip the capital gains pages only if two conditions both hold: gains within the annual exempt amount, and consideration for chargeable disposals of no more than £50,000. The SA108 notes state it plainly. The GOV.UK guidance written for crypto holders, updated on 5 October 2026, never mentions a proceeds threshold. Neither does the general reporting page.
The statute governs. Crypto-to-crypto swaps are disposals and the value of what you receive counts towards the £50,000, so an active year reaches it on no gain at all. Miss the filing and the penalties run £100, then £10 a day to £900, then £300 or 5 per cent at six and twelve months — at least £1,600 on nil tax.
What the liquidity pool measure is worth, worked through. A higher-rate taxpayer with £62,000 of employment income has £49,430 of taxable income, so every gain is at 24 per cent. They deposit 5,000 of a token from a 20,000-unit pool costing £30,000, worth £3.00 each, and 500 of a second from a 1,000-unit pool costing £15,000, worth £25.00.
| Proceeds, token A | £15,000, cost £7,500, gain £7,500 |
| Proceeds, token B | £12,500, cost £7,500, gain £5,000 |
| Total gain, current law | £12,500 |
| Less annual exempt amount | £3,000 |
| Tax at 24% | £2,280 |
| Same deposit from 6 April 2027 | £0, base cost of £15,000 rolls through |
| With £47,000 of other swaps, proceeds tested | £74,500 now, £47,000 after |
| Capital gains pages | required now, not required after |
So the measure is worth £2,280 and a set of capital gains pages, on a transaction where no sterling changed hands. That is the cost of the rule, and why it is changing.
Against that: the allowance and rates are stable for four years, so planning is possible; the real-time capital gains service is open until 31 December for 2025/26 gains; small liabilities can be coded out through PAYE if the return is in by 30 December; and the disclosure service is open for earlier years, worth using before the first framework reports land on 31 May 2027.
Budget measures quoted from the Overview of Tax Legislation and Rates and Annex A, both published 28 October 2026, and the impact notes for stablecoins and for cryptoasset loans and liquidity pools, both updated the same day, with the draft clauses as published. Notice provisions from Schedule 36 of the Finance Act 2008 at legislation.gov.uk, inserted by section 126 of the Finance Act 2021; the £50,000 test from section 8C of the Taxes Management Act 1970 and the SA108 notes for 2025/26. Rates, allowances, deadlines and penalties from GOV.UK, retrieved 2 November 2026; arithmetic computed here. Late payment interest is 7.75 per cent from 9 January 2026, but the Monetary Policy Committee decides on 5 November and a change in Bank Rate moves it mechanically, so treat it as correct at 2 November only. Contested: the stablecoin impact note describes a deferral election and a withholding extension absent from the published draft clauses, so both are intentions without statutory text; the Finance Bill is at first reading with no text and no Royal Assent date, so the notice extension has no commencement date; HMRC’s Cryptoassets Manual was last updated on 28 November 2025, says nothing about any of this, and has no legal force where it differs from statute. Announced rates are labelled throughout. General information, not tax advice, and not a recommendation to buy, sell or hold anything.