UK Stablecoin Rules: Can Issuers Pay Interest to Holders?

The UK has finally put shape around fiat-referenced stablecoins. After years of workshops, consultations, and a few false starts, the regulator answered the big question that kept coming up in boardrooms and Telegram chats: can issuers pay interest to holders?

Short answer: no. The Financial Conduct Authority’s final package makes that clear. The long answer is more nuanced, because the rule bites in specific ways, and other parts of the regime (and the tax office) still matter for anyone building products or parking cash in stablecoins.

Let’s unpack the ban, why it exists, where yields might still show up, and what changes on the tax side from 2027.

What the FCA said about interest

The FCA’s policy statement released on 30 June 2026 landed with a crisp line: qualifying stablecoin issuers in the UK can’t pass through interest or other income from the reserve pool to tokenholders. Not through a coupon. Not by auto-boosting balances. Not by calling it a “reward.” If the value is flowing from the backing assets, it’s off limits. The language covers both direct and indirect structures, so rebranding yield won’t dodge the rule (Financial Conduct Authority — PS26/10 (Policy Statement)).

Direct vs. indirect payments

Direct is easy to picture: a monthly interest payment into your stablecoin wallet. Indirect is trickier but matters in real life. Think loyalty multipliers that grow your token balance based on how long you hold, or a “cashback” that’s explicitly funded by reserve income. The FCA reads through the wrapper: if the scheme relies on the reserve earnings, it’s still interest in substance.

Why take the hard line?

Stablecoins sit in the payments lane in the UK regime. The whole premise is stability and redeemability at par. Passing yield to holders blurs the line with deposit-taking and investment products, creates run risks when rates move, and invites maturity mismatch games that have already rocked other corners of finance. The regulator is choosing boring on purpose.

Pro tip: If you’re an issuer, document exactly how any user incentive is funded. If the money trails back to reserve income, you’re likely offside. If it’s purely marketing budget with caps, that’s a different conversation, but you’ll still need to navigate promotions rules.

How reserves are built and why yield isn’t shared

The ban raises a fair question: if issuers can’t pass on yield, where does the reserve income go? Into safety buffers and running the business. The policy materials that accompanied the FCA’s package highlighted a revised calibration for reserves: up to 70% can sit in short-term UK government debt, with the rest in unremunerated central bank deposits. That mix is conservative on liquidity and credit, and the unremunerated slice means the blended yield isn’t as juicy as headlines suggest. Either way, it’s not a pot to distribute (Skadden (client alert)).

Issuance guardrail and prudential floor

There’s also a temporary per-coin issuance guardrail initially set at £40 billion in the broader framework connected with the Bank of England’s oversight. It’s basically a speed limiter while the system scales. On top of that, the final package tightened prudential details: a permanent minimum own funds requirement of £350,000 and a reduced K‑SII calibration at 1%. The net effect is the same: build robustness first, growth later (Skadden (client alert summarising FCA PS26/10)).

So yes, reserves will likely earn something when rates are positive. But under these rules, that income is meant to keep the coin tight at par through market cycles and to pay for operations, audits, and compliance, not to turn the token into a yield product.

Where returns might still show up

If issuers can’t pay interest, where does yield come from? Two places show up in practice:

• Third-party platforms that borrow or rehypothecate the stablecoin (centralized or DeFi) and pay you a return.
• Marketing promos that look like yields but are really spend incentives or limited-time bonuses from a platform’s own budget.

Those aren’t the issuer. That distinction matters. A DeFi lending market paying you 3% is very different from an issuer flowing treasury earnings to holders. The risk profile flips too: you’re taking smart contract risk, counterparty risk, and liquidity risk on the platform, not the issuer reserve.

Promotions and UK marketing rules

Even if a platform wants to run a promo, the UK’s financial promotions regime still sits over the top. Stablecoins marketed to UK consumers bring fair, clear, not misleading rules, risk warnings, and frictions for direct offer promotions. And if a platform’s “yield” comes from the issuer’s reserve in any way, you’re back in breach territory because of the indirect payment point from PS26/10. Keeping those lines clean is not trivial (Financial Conduct Authority — PS26/10).

Reality check: if a UK platform is advertising steady “interest” on a UK qualifying stablecoin, ask who funds it. If the answer is the issuer’s reserve or anything pegged to it, that’s a red flag under the new rules.

Tax from 2027: what HMRC plans

Here’s the twist. The tax office is preparing for a world where some people still earn interest-like returns on stablecoins, even if not from the issuer. HMRC’s policy paper published on 13 July 2026 says interest-like returns on eligible stablecoins will be taxed as savings income. The operative dates: from 6 April 2027 for individuals and trustees, and from 1 April 2027 for companies. The paper also flags a rough scale: about 1.2 million individuals could be affected (HMRC / GOV.UK – Taxation of stablecoins).

What counts as “interest-like”

In plain terms, if you get a return that looks and behaves like interest on cash, HMRC wants to treat it as savings income. That could be from a centralized platform product, a lending pool, or maybe a structured wrapper. HMRC isn’t blessing the product. It’s just setting the tax bucket.

One practical implication: records matter. Keep clear logs of which platform paid the return, dates, and amounts. If a return hits in the UK tax year from April 2027, assume it belongs in the savings income lane unless your advisor confirms another category.

How the UK stance compares

Globally, most major fiat-backed stablecoins don’t share reserve yield with holders. USDC and USDT, for example, keep treasury income at the issuer level. The UK’s rule essentially codifies that model for coins operating in the UK payments perimeter and makes it explicit. The difference in the UK is the clarity and the support structure wrapped around it: guardrails, their focus on short-dated gilts, and central bank deposits as a liquidity backstop, plus prudential floors for issuers (Skadden (client alert)).

For builders used to DeFi norms where tokens often route protocol revenue to holders, the UK payments-grade stablecoin is different on purpose. It prioritizes reliable par redemption and plain-vanilla payment rails over capital-formation features.

Issuer and platform checklist

If you’re preparing a UK qualifying stablecoin or distributing one, here’s a practical list to keep you out of trouble:

• Map every user-facing benefit. If any pathway touches reserve income, remove or redesign it.
• Ringfence marketing spend. Incentives should be budgeted, capped, and demonstrably not linked to reserve yield.
• Review copy. Strip “interest,” “APY,” and similar labels from issuer materials. Promotions must be fair, clear, not misleading, with proper risk flags in the UK.
• Document reserves. Align with the 70% short-term gilt and unremunerated central bank deposit calibration noted in policy materials, and keep liquidity testing evidence handy (Skadden).
• Meet prudential floors. Monitor own funds (≥ £350,000) and K‑SII at 1% under the final calibration.
• Track issuance. The per‑coin £40 billion guardrail matters for growth planning and supervisory dialogue.
• Tax readiness. If you or partners offer yield-like products, build statements that categorize returns as savings income for UK taxpayers from April 2027 (HMRC).

Holder playbook and red flags

For users, the rules make life simpler in one way: if it’s a UK qualifying stablecoin, don’t expect the issuer to pay you interest. Any return you see is coming from a platform or protocol taking risk with your tokens.

• Ask who pays you. If the answer is “the issuer’s reserve,” walk away. That’s not allowed under PS26/10 (FCA).
• Check custody. If a centralized platform is offering “yield,” how are tokens held? Segregated, rehypothecated, insured? Your risk sits there, not at the issuer.
• Read the small print. Caps, lockups, and withdrawal gates matter. High “APY” with a 30‑day exit gate is not cash‑like.
• Mind the tax trail. Returns received from April 2027 likely sit in the savings income bucket for UK tax. Keep records (HMRC).
• Watch for word games. “Rewards,” “boosts,” “loyalty yield” — if the economics look like interest on cash, be skeptical.

Pro tip: If you just want stable value with minimal fuss, verify redeemability mechanics and transparency reports. Chasing yield on top is a separate decision with separate risks.

Worked examples

A compliant setup

An issuer launches a UK qualifying stablecoin. Reserves sit 65% in 1–3 month gilts and 35% at the central bank on unremunerated accounts. The issuer earns some income on gilts, keeps it to cover costs and buffers, and publishes monthly attestations. No user yield. A UK exchange lists the coin with standard trading fee rebates unrelated to reserves. Clean.

A non-compliant incentive

An issuer advertises a 1% “holder reward,” paid weekly, funded by “portfolio income.” Even if they avoid the word “interest,” that’s a direct pass‑through from reserve yield. It breaches the PS26/10 prohibition.

Borderline: platform cashback

A UK wallet app offers 0.5% cashback on spending with a debit card funded by a qualifying stablecoin. The cashback is paid from the app’s marketing budget and capped monthly. There’s no link to the issuer reserve or holding duration. This can be designed to avoid the interest ban, but promotions rules and fair‑value disclosure still apply.

DeFi yield outside the issuer perimeter

You deposit a UK qualifying stablecoin into a lending pool and earn variable APR from borrowers. That return comes from the protocol’s economics, not the issuer’s reserve. It may be permitted to earn it, but you’re taking protocol risk. From April 2027, HMRC would generally slot that into savings income for UK tax purposes if it’s interest-like.

Risks and misreads to avoid

• Assuming “no interest” means “no risk.” Price stability is not the same as platform safety. Counterparty and smart contract risks still exist.
• Believing wrappers are magic. If a scheme relies on reserve income but adds a loyalty veneer, it’s still within the prohibition.
• Confusing BoE guardrails with absolute caps. The £40 billion per-coin guardrail guides supervision; it’s not a forever hard limit, and it may evolve (Skadden).
• Forgetting operational buffers. Prudential floors like the £350,000 own funds minimum are small in absolute terms, but they’re not optional.
• Ignoring tax prep. If you plan to earn returns in 2027, set up tracking now. Tax headaches often come from missing paperwork, not rate shocks.

What this means for product design

If you’re building in the UK, split the stack in two. The stablecoin layer should be boring: par, liquid, transparent, with reserves aligned to the gilts-and-deposits calibration referenced in policy materials. All the “features” live one layer up in wallets, rails, and commerce experiences. Want to delight users? Do it with UX, fee routing, settlement speed, and integrations — not by dipping into the reserve to juice returns.

And for treasurers or creators thinking of parking operational cash in a stablecoin, calibrate expectations. It’s a payments instrument first. If you need yield, you’re choosing an additional risk channel (money market funds, Defi lending, centralized products) with a different rulebook and disclosures. Don’t conflate them.

For ongoing analysis, daily market notes, and the straight-talk version of policy changes, you can always check the coverage at Crypto Daily.

Frequently Asked Questions

Can a UK qualifying stablecoin pay me interest for holding?

No. The FCA’s final rules maintain a prohibition on passing through reserve income to tokenholders, whether labeled as interest, rewards, or any similar construct (FCA — PS26/10).

Are cashback or loyalty bonuses allowed?

They can be, but only if they are funded from a platform’s own budget and not from the issuer’s reserve income. They also need to comply with UK promotions rules and be clearly presented.

What if I earn yield from a DeFi protocol using a UK stablecoin?

That’s a platform-level return, not an issuer payment. You’re taking protocol and counterparty risk. From April 2027, HMRC plans to treat interest-like returns as savings income for tax purposes (HMRC).

Does the £40 billion guardrail cap stablecoin supply forever?

No. It’s a temporary per-coin issuance guardrail tied to oversight during scale-up, as reflected in the policy framing. It could change as the system matures (Skadden).

Where does reserve yield go if not to holders?

It supports operations, audits, and buffers designed to keep the coin redeemable at par through stress. The reserve mix emphasises short-dated gilts and central bank deposits and isn’t a distributable pot under the rules.

How will my returns be taxed in the UK after 2027?

HMRC’s plan is to tax interest-like returns on eligible stablecoins as savings income from 6 April 2027 for individuals and trustees, and from 1 April 2027 for companies. Keep records and confirm specifics with a tax adviser (HMRC).

Do the prudential rules change how safe stablecoins are?

They set floors and guardrails — like minimum own funds of £350,000 and a K‑SII of 1% — to strengthen resilience. They don’t eliminate market, counterparty, or operational risks, but they raise the baseline (Skadden).

Disclaimer: This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.