UK Finalizes Crypto Rulebook, Halves Stablecoin Capital Floor
The FCA's June 30 rulebook pulls crypto under formal oversight, imports market abuse rules, and sets stablecoin capital at 1%, half the original plan.
Britain's Financial Conduct Authority published its most comprehensive crypto rulebook yet on June 30, pulling a broad slice of cryptoasset activity under formal supervision for the first time. The package sets prudential standards, imports market abuse rules, and carves out a dedicated regime for stablecoin issuers. One number stands out. Stablecoin issuers will have to hold capital equal to 1% of issuance volume, half the 2% the FCA first proposed before industry pushed back.
The compliance clock
The rules flow from the Financial Services and Markets Act 2000 (Cryptoassets) Regulations 2026, which Parliament passed in February. Firms that want to operate under the regime can file authorization applications in a window that opens September 30, 2026 and closes February 28, 2027. The full framework does not take effect until October 25, 2027. The teeth are real, but they are more than a year out.
Market abuse provisions
This is the part that changes how trading desks behave. The FCA is lifting rules traditional markets have lived with for decades: insider trading prohibitions, manipulation bans, and disclosure duties, now applied to tokens and the exchanges that list them. For UK-regulated venues, that reshapes how sensitive information can move before it goes public. The 1% stablecoin floor works differently. It sets a regulatory minimum that screens out undercollateralized issuers before they reach British users.
Closing the offshore loophole
The framework also goes after a gap that has sat open for years. Any entity or branch serving UK consumers now has to comply with local rules, ending the setup where offshore exchanges could take on British users with no accountability at home. The February legislation was written explicitly to make the UK a leading global hub for digital assets, and the FCA is building on authority it already held over anti-money-laundering compliance and financial promotions. What is new is the breadth. Prudential, consumer protection, and transparency obligations now treat crypto firms as financial institutions rather than a category apart.
The next marker is September 30, when the application window opens. Everything after that waits on October 2027.
Sources
- UK government introduces new crypto rules to boost global trading · FCA
Disclosure
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