The UK Financial Conduct Authority published PS26/18, its final cryptoasset perimeter guidance, on 16 September 2026. This is not an enforcement action or a warning against a particular exchange. It explains how the FCA currently interprets the future regime: which commercial activities may require permission, whether existing registrations carry across, and how overseas firms should assess UK-facing services.
The regime is due to begin on 25 October 2027. Firms seeking to use the transitional arrangements can apply between 30 September 2026 and 28 February 2027. For exchanges, brokers, custodians, stablecoin issuers and staking providers serving UK customers, the task now is to map each service to the legal entity, customer contract, asset control and territorial facts behind it.
Activities most likely to fall inside the perimeter
The guidance covers issuing qualifying stablecoins, operating qualifying cryptoasset trading platforms, dealing as principal or agent, arranging deals, safeguarding cryptoassets and arranging staking. Labels are not decisive. The substance of the service, control over orders and assets, whether the activity is part of a continuing business model, and any statutory exclusion or exemption all matter.
A system in which multiple third-party buying and selling interests interact and produce cryptoasset contracts may be a qualifying trading platform. If the same platform also controls keys or holds assets for clients, the platform permission does not automatically cover custody. Matched-principal execution for customer orders may add a dealing-as-principal permission.
An ordinary person does not become a regulated provider merely by periodically buying, holding, selling or staking cryptoassets. The FCA says the new activities use a narrower business test focused on whether the regulated activity itself forms part of the person's business. The outcome remains fact-specific.
Existing status will not convert automatically
PS26/18 states that existing anti-money-laundering registration and current FCA permissions do not automatically convert into the new crypto permissions. Registered exchange or custodian-wallet providers must assess each activity and seek the relevant Part 4A permission. Firms already authorised for other financial services may need a variation of permission.
Anti-money-laundering duties also continue. A firm may need to consider authorisation, MLR registration or notification and financial-promotion rules separately. Compliance with one regime does not substitute for the others.
Overseas firms must look beyond incorporation
For an overseas exchange or broker, the central question is whether an activity is carried on, or legally deemed to be carried on, in the UK. Place of incorporation, server location and group headquarters are not the only facts. Service design, customer targeting, contracts, execution and statutory territorial rules can all affect the result.
An offshore entity serving UK users should therefore retain evidence about onboarding, marketing restrictions, execution, custody, outsourcing and geographic controls. Where several group entities share a brand, website or wallet infrastructure, the contracting entity and the entity actually delivering each service need to match.
More perimeter changes are coming
The FCA says the Government has made targeted legal changes concerning UK qualifying stablecoins, proprietary trading and market making, certain technology providers, decentralised protocols, custody involving central securities depositaries and financial promotions. The regulator plans another consultation in October 2026 and aims to publish revised guidance in early 2027.
PS26/18 is therefore the current preparation baseline, not a promise that every boundary will remain unchanged. Firms can begin gap analysis now but should continue tracking the amending instrument and the FCA consultation.
Impact on traders and firms
For traders, a clearer perimeter does not remove price, custody or failure risk. Users should identify the legal entity providing the service, its exact permissions, who controls client assets, available complaints or compensation routes, and whether the firm is applying or operating under a transition. An FCA registration alone does not mean every product receives the same protection.
For exchanges, brokers and financial institutions, the immediate work is permission mapping. Platform operation, order arranging, principal or agency dealing, custody, staking, stablecoin issuance and promotions should be reviewed separately against the responsible entity, customer agreement, asset flow and technical control. A group licence, legacy MLR registration or third-party custody contract may not close every gap.
TraderVote view
The significance of the guidance is activity-level accountability. Trading, custody and staking can appear in one interface but generate different permissions and ongoing obligations. Users assessing compliance should move beyond the brand to the specific entity, service and permission.
The dates are clear: applications open on 30 September 2026, the transitional application window closes on 28 February 2027, and the regime starts on 25 October 2027. Whether a firm applies, which activities its application covers and whether authorisation is ultimately granted must be checked against later FCA records. “Preparing to apply” is not the same as “authorised”.
Sources
FCA, “Crypto firms get guidance on how the new regime applies,” published 16 September 2026, accessed 16 September 2026: https://www.fca.org.uk/news/press-releases/crypto-firms-get-guidance-how-new-regime-applies
FCA, “PS26/18: Cryptoasset perimeter guidance,” published 16 September 2026, accessed 16 September 2026: https://www.fca.org.uk/publications/policy-statements/ps26-18-cryptoasset-perimeter-guidance
FCA Handbook, “PERG 18 Guidance on regulated cryptoasset activities,” updated 16 September 2026, accessed 16 September 2026: https://handbook.fca.org.uk/handbook/perg18
UK Legislation, amending statutory instrument for the cryptoasset framework, accessed 16 September 2026: https://www.legislation.gov.uk/ukdsi/2026/9780348287233/contents
Written independently by Hengyuan from public information verifiable as of 16 September 2026. Application of the perimeter depends on specific facts and later legal updates. This article is not investment or legal advice.
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