What crypto activities require registration in the UK?
Exchange and custody are the core categories most commonly requiring FCA cryptoasset registration. Under the UK AML framework, the most important categories are the cryptoasset exchange provider and the custodian wallet provider. This usually captures businesses exchanging crypto for fiat, fiat for crypto, crypto for crypto, or safeguarding cryptoassets or private cryptographic keys on behalf of customers. That is why the phrase crypto exchange license in UK usually points to exchange-provider registration rather than one universal licence.
Exchange services: fiat-to-crypto, crypto-to-crypto, OTC, and ATMs
Most customer-facing exchange models fall inside the perimeter. That includes app-based retail exchange, broker-style execution, certain OTC desk models, and crypto ATMs where the operator provides exchange functionality. The legal analysis still needs detail: principal dealing, agency execution, arranging, and venue-like matching models can create different regulatory consequences.
A useful practical test is whether the firm is commercially interposed in the exchange flow, controls onboarding, prices or routes execution, and handles customer transaction monitoring. If yes, AML registration is usually central.
Custody, wallet infrastructure, and private key control
Private key control is the dividing line between many custodial and non-custodial models. If the firm safeguards or administers cryptoassets or the means of access to them for customers, it is likely acting as a custodian wallet provider. By contrast, pure non-custodial software that never controls customer keys may sit outside that specific category, though other legal issues can still apply.
In practice, founders often underestimate edge cases such as recovery services, MPC implementations, delegated signing rights, omnibus wallet structures, and admin override capabilities. The FCA will look at actual control, not just product labels.
Token issuance, security tokens, stablecoins, and payment-linked models
Token issuance does not map to one universal UK crypto license. The legal result depends on token design and rights attached. The FCA’s cryptoasset guidance historically distinguished between exchange tokens, utility tokens, and security tokens, but founders should also assess whether a structure behaves like e-money, a payment instrument, or another regulated product.
If a token grants rights similar to shares, debt instruments, units in a collective investment, or derivatives exposure, the model may move into the FSMA perimeter. If a stablecoin or stored-value structure includes redeemability, payment functionality, or fiat-backed monetary claims, the analysis may engage the Electronic Money Regulations, Payment Services Regulations, or evolving UK stablecoin rules. This is why a token project should never assume that “ICO” is itself the legal category that answers the licensing question.