UK Softens Stablecoin Capital Rules in Bid to Support Crypto Innovation
The UK is making its stablecoin rulebook more flexible.
In June 2026, the Financial Conduct Authority (FCA) finalised its rules for stablecoin issuers and reduced the capital requirement tied specifically to stablecoin issuance. After reviewing industry feedback, the regulator cut the K-SII coefficient from 2% to 1%.
The change affects how larger stablecoin issuers calculate part of their prudential capital requirement.
However, the UK is not removing financial safeguards.
Stablecoin issuers will still face capital, backing-asset, redemption and safeguarding requirements. Systemic issuers will also face joint supervision from the FCA and the Bank of England once HM Treasury recognises them as systemic.
The result is a regulatory framework that tries to combine stronger oversight with more proportionate requirements.
For the stablecoin industry, that balance could matter.
FCA Cuts the Stablecoin K-SII Requirement
The most notable change concerns the K-SII factor.
Under the FCA’s final prudential framework, the regulator reduced the coefficient used for stablecoin issuance from 2% to 1%. The FCA said it made the adjustment after considering feedback on the calibration of its proposed rules.
In practical terms, the change reduces the capital requirement generated by this specific factor for stablecoin issuers.
The FCA described the revised approach as more proportionate for larger issuers while maintaining the overall robustness of the prudential framework.
That distinction is important.
The UK has not abandoned capital requirements for stablecoin companies. Instead, the regulator has changed one part of the calculation.
Other prudential requirements still apply.
Why Did the FCA Change the Rule?
The adjustment followed extensive consultation with industry participants.
The FCA received feedback from crypto companies, industry associations, traditional financial institutions and other stakeholders while developing the new regime. Its stablecoin consultation alone received 80 responses.
Some of the feedback focused on whether the proposed requirements were proportionate to the risks involved.
The FCA responded by simplifying several parts of the framework.
Besides the K-SII change, the final stablecoin rules also simplify parts of the backing-asset requirements, adjust redemption timelines and allow limited intragroup custody subject to safeguards.
Taken together, those changes show a broader effort to make the framework workable in practice.
The regulator still wants firms to meet clear standards.
At the same time, it wants the rules to reflect the different risks and business models that can exist within the stablecoin market.
Stablecoin Issuers Still Face Strong Requirements
Lowering one capital coefficient does not mean stablecoin issuers can operate without significant safeguards.
The FCA’s final framework includes rules covering backing assets, safeguarding and redemption.
UK-issued qualifying stablecoins must also maintain full backing and allow holders to redeem their tokens at par under the applicable rules.
That requirement addresses one of the central questions around stablecoins: whether holders can reliably convert their tokens back into the underlying value.
The FCA also introduced clearer requirements around disclosures.
Stablecoin holders need information about their rights, while prospective holders must receive relevant information before acquiring the tokens.
So, although the capital calculation became less demanding in one area, the wider framework remains extensive.
Systemic Stablecoins Will Face Two Regulators
The UK’s regulatory structure becomes more complex when a stablecoin reaches systemic importance.
A qualifying stablecoin that remains non-systemic falls under the FCA’s regime.
Once HM Treasury recognises an issuer as systemic, the Bank of England and FCA will jointly regulate it. The two authorities published their approach to this joint framework on June 30, 2026.
The distinction reflects the different risks associated with stablecoins.
A token used mainly for crypto trading may create different risks from one that becomes widely used for everyday payments.
If a stablecoin becomes deeply connected to the UK’s payment system, disruption could have wider financial consequences.
That is where the Bank of England’s role becomes more important.
Bank of England Takes a Different Role
The Bank of England is responsible for the parts of the regime that address systemic stablecoin risks.
Its June 2026 policy statement introduced draft rules for systemic stablecoin issuers. The framework focuses on issues including backing assets, liquidity, capital, redemption and access to central bank support.
The Bank also made several changes after receiving industry feedback.
For example, it increased the maximum share of backing assets that issuers can hold in interest-bearing short-term UK government debt from 60% to 70%.
The remaining backing assets would sit in central bank deposits, helping issuers meet redemption requests.
Another change involved issuance limits.
Rather than introducing the temporary holding limits proposed during the consultation, the Bank proposed an initial £40 billion temporary issuance guardrail for each systemic stablecoin. It said this approach would achieve the same policy objective while being cheaper and easier to implement.
These changes show that the UK’s approach extends beyond capital requirements alone.
Regulators are also examining liquidity, reserves, redemption, and the broader financial system.
The UK Wants Stablecoins to Support Payments
These regulatory changes come as the UK explores stablecoins as part of the future payments landscape.
Stablecoins could potentially support faster and more flexible payment services, including cross-border transactions.
The FCA has also been studying stablecoin use cases through its Stablecoin Sprint.
That programme examined potential applications in remittances and retail payments, while a later trade finance roundtable explored additional use cases.
The regulator’s final rules therefore arrive alongside broader work on digital payments.
The objective is not simply to regulate stablecoins as speculative cryptoassets.
Officials are also examining how they could function within financial and payment markets.
Regulation Is Moving Toward a More Proportionate Model
One phrase appears repeatedly in the UK’s latest regulatory framework: proportionality.
The FCA says its final regime aims to improve clarity while applying requirements that reflect the risks involved.
That approach matters because stablecoin issuers can have very different business models.
A smaller issuer with limited use may not create the same systemic risk as a stablecoin that becomes widely used for payments.
The joint FCA and Bank of England framework recognises this distinction.
Systemic issuers face more stringent requirements because their activities could have greater consequences for financial stability. Non-systemic issuers remain under the FCA framework.
In other words, the UK is not applying exactly the same regulatory intensity to every stablecoin.
The level of oversight can increase as the importance of an issuer grows.
What Does the Capital Change Mean for Stablecoin Companies?
For stablecoin issuers, the lower K-SII coefficient could affect the amount of capital required under the FCA’s prudential framework.
That could become relevant as larger issuers consider entering or expanding within the UK market.
Capital remains important because issuers need resources to absorb losses and support an orderly wind-down.
However, excessively complex or high requirements can also affect how firms structure their businesses.
The FCA’s adjustment attempts to address that balance.
The regulator wants firms to maintain adequate financial resilience without creating requirements that exceed the risks associated with the activity.
For companies building stablecoin infrastructure, regulatory design can therefore influence where they choose to operate and how they build their products.
The UK Crypto Framework Is Getting Closer
The stablecoin rules form part of a much larger UK crypto regulatory programme.
In February 2026, legislation brought a broader range of cryptoasset activities into the FCA’s regulatory perimeter.
The full scope of the new regime is scheduled to expand from October 25, 2027. The FCA’s authorisation gateway is scheduled to open on September 30, 2026.
That timeline gives crypto companies time to prepare.
Stablecoin issuers, custodians, trading platforms and other regulated businesses will need to understand which requirements apply to their particular activities.
The FCA has also said it will continue developing rules in areas such as DeFi, DLT operational resilience, financial crime and stablecoin-related policy.
So, the June announcement is not the end of UK crypto regulation.
It is one part of a much larger framework.
Stablecoins Could Become Part of Mainstream Finance
The UK’s approach reflects a wider shift in how regulators view stablecoins.
A few years ago, stablecoins were primarily associated with crypto trading and digital-asset markets.
Today, regulators are also examining their potential role in payments, settlement and financial infrastructure.
The FCA’s own policy work reflects that change.
Its stablecoin framework allows qualifying stablecoins to operate under specific rules, while the Digital Securities Sandbox can also accommodate qualifying stablecoins as settlement assets under its updated guidance.
That creates a potential bridge between digital assets and traditional financial markets.
Banks, fintech companies and crypto firms could eventually use regulated stablecoins in areas such as payments and settlement.
Of course, adoption will depend on commercial demand, technology, regulation and risk management.
The new rules simply create a clearer framework in which those developments can take place.
Why This Matters for the Global Crypto Industry
The UK’s latest stablecoin rules show how regulation can evolve after industry feedback.
The FCA did not remove prudential oversight.
Instead, it changed the K-SII coefficient from 2% to 1% and simplified other elements of the framework.
That may become an important signal for other jurisdictions developing their own stablecoin rules.
Regulators around the world are facing a similar question: how can they manage the risks of stablecoins without making the regulatory framework unnecessarily difficult for legitimate firms to use?
The UK is now testing one answer.
Its model combines FCA oversight for qualifying stablecoins with stronger joint supervision for issuers that become systemic.
The framework also leaves room for further changes as the market develops.
What Happens Next?
The UK’s stablecoin framework is moving toward implementation.
The FCA’s authorisation gateway is scheduled to open on September 30, 2026, while the broader cryptoasset regime is scheduled to take effect on October 25, 2027.
Meanwhile, the Bank of England plans to finalise its Code of Practice for systemic stablecoin issuers by the end of 2026, subject to feedback on its draft rules.
That means stablecoin companies will have a clearer path to prepare for the new regime.
The regulatory framework will also continue to evolve.
Both regulators have indicated that they will review and refine their approach as stablecoin use cases develop.
The Bigger Picture
The UK’s latest move is not simply about reducing a capital requirement.
It reflects a broader attempt to build a stablecoin framework that can accommodate innovation while maintaining financial safeguards.
The FCA has reduced the K-SII coefficient from 2% to 1%, simplified parts of its stablecoin rules and adjusted several operational requirements after consulting industry participants.
At the same time, systemic stablecoins will face joint oversight from the FCA and Bank of England once HM Treasury recognises them as systemic.
That creates a tiered approach.
Smaller or non-systemic issuers remain under FCA supervision, while stablecoins that become important to the wider payment system can move into a more intensive supervisory framework.
For the crypto industry, the message is clear.
The UK is not stepping away from stablecoin regulation.
Instead, it is trying to make the rules more proportionate while preparing for stablecoins to play a larger role in payments and financial markets.
The next phase will show whether that balance can support both regulatory confidence and real-world adoption.
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