Stablecoin
Singapore MAS Stablecoin Framework: Compliance Checklist for Issuers
July 14, 2026
14 mins read
MAS finalized its Single-Currency Stablecoin framework in August 2023. Legislation is expected mid-2026. This article breaks down exactly what issuers must do to qualify as an MAS-regulated stablecoin — and where the current reporting model falls short.
TL;DR: MAS finalized its Single-Currency Stablecoin framework in August 2023, with Payment Services Act legislation expected mid-2026. Requirements include 100% reserve backing, monthly independent attestation, annual audits, and redemption at par within five business days. Between attestation cycles reserve adequacy is unproven; MAS has not yet accepted cryptographic proof as a substitute, but continuous verification is already technically possible.
Singapore stablecoin regulation is entering its most consequential phase. The Monetary Authority of Singapore finalized its Single-Currency Stablecoin (SCS) framework in August 2023, and formal Payment Services Act amendments are expected to convert that framework into binding legislation by mid-2026. For compliance officers and founders at stablecoin issuers operating in or targeting Singapore, the window for operational readiness is narrowing.
Only two entities, StraitsX (XSGD/XUSD) and Paxos Digital Singapore (USDG), have been publicly acknowledged by MAS as substantially compliant with the upcoming framework. That list will need to grow. This article maps exactly what MAS requires, where the framework creates residual risk, and what a cryptographic verification layer adds to the compliance stack.
Key Takeaways:
- MAS requires 100% reserve backing in cash, cash equivalents, or short-duration government debt (≤3 months maturity, minimum AA- credit rating), held in segregated accounts at Singapore-licensed financial institutions.
- Monthly independent attestation by an external audit firm is mandatory, results must be published on the issuer's website and submitted to MAS by month-end following the reporting period.
- Annual external audit of reserve assets is required in addition to monthly attestation.
- Issuers are restricted to stablecoin issuance only, lending, staking, and unrelated financial activities are prohibited.
- The framework's primary gap: monthly attestation is a point-in-time snapshot. Reserve status for the other 29 days per cycle is unproven. MAS has issued no guidance on accepting cryptographic proof as a substitute.
What Is the MAS Single-Currency Stablecoin Framework?
The MAS SCS framework covers stablecoins pegged to the Singapore dollar or any G10 currency, issued in Singapore. It emerged from MAS's broader review of payment services regulation and represents a deliberate, principles-based approach, setting outcome requirements without prescribing the specific technology architecture issuers must use.
This matters for compliance teams: unlike the EU's MiCA framework (which is prescriptive about reserve composition to the point of ongoing dispute between the EBA and the European Commission), MAS specifies the outcome and leaves method largely to the issuer. That flexibility is operationally useful. It also means compliance officers bear more interpretive responsibility.
The formal Payment Services Act amendment, expected mid-2026, will convert the August 2023 framework into enforceable statute. Issuers building against the existing framework are effectively building against the incoming legislation. But the legislation may still introduce requirements not yet in the finalized framework, which is why leading issuers like StraitsX have voluntarily adopted attestation cadences twice as frequent as the minimum required.
For singapore stablecoin issuers, the message from MAS is consistent: build the compliance infrastructure before the law lands, not after.
What Does MAS Actually Require from SCS Issuers?
The framework sets requirements across five operational domains. Each has a clear compliance standard, and each has a less obvious residual risk that compliance teams must understand.
Reserve composition and custody. Issuers must maintain 100% par-value backing at all times. Eligible reserve assets are restricted to cash, cash equivalents, and government debt securities with a residual maturity of no more than three months and a minimum credit rating of AA-. These assets must be held in segregated accounts at Singapore-licensed financial institutions or qualifying overseas custodians, institutions with a minimum A- credit rating and a Singapore branch regulated by MAS for custodial services.
The custodian requirement creates a practical concentration risk: the pool of eligible custodians in Singapore is narrow. Both StraitsX and Paxos Digital Singapore rely primarily on DBS and Standard Chartered, which creates operational dependency on a small number of institutions.
Attestation and audit. Monthly independent attestation by an external audit firm is required. The attestation must cover the percentage value of reserves in excess of par value. Results must be published on the issuer's website and submitted to MAS by month-end following the reporting period. Annual external audit of reserve assets is required separately from monthly attestation.
The attestation standard matters. MAS does not specify whether ISAE 3000 or another framework applies, but the requirement is for independent external review, not internal reporting or self-certification.
Redemption rights. Stablecoin holders must be able to redeem at par value within five business days of request. This is a hard operational requirement. Issuers need to ensure reserve liquidity meets this window even under stress conditions.
Whitepaper disclosure. Issuers must publish a whitepaper covering the value stabilization mechanism, the technology architecture, risks, holder rights, and audit results. This is not a one-time filing, it must remain current as material facts change.
Business scope restriction. MAS SCS issuers can only issue stablecoins. Lending, staking, running unrelated financial services, or commingling stablecoin reserve assets with other business activities is prohibited. This is a sharper restriction than some issuers expect.
Compliance Checklist: What MAS Requires?
The table below maps each MAS SCS requirement to the compliance obligation and the residual risk that monthly attestation alone does not resolve.
| Requirement | Compliance Standard | Residual Risk |
|---|---|---|
| Reserve backing | 100% of par value at all times, cash, cash equivalents, government debt ≤3 months maturity, min AA- credit rating | Backing is only verifiable at attestation date. Between monthly cycles, reserve adequacy is unproven. |
| Reserve custody | Segregated accounts at Singapore-licensed FIs or qualifying overseas custodians (min A- rated, Singapore branch) | Narrow custodian pool creates concentration and dependency risk. |
| Monthly attestation | Independent external audit firm; results published on issuer website and submitted to MAS by month-end + 1 | Point-in-time snapshot. Does not cover intra-month reserve movements or composition changes. |
| Annual audit | Full external audit of reserve assets | Lower cadence than monthly attestation; relies on annual point-in-time review. |
| Redemption at par | Within 5 business days of request | Liquidity must be maintained continuously, not just at audit date. |
| Whitepaper disclosure | Value stabilization mechanism, technology, risks, holder rights, audit results, must stay current | No standardized digital format mandated; disclosure quality varies by issuer. |
| Business scope | Stablecoin issuance only, no lending, staking, or unrelated services | Enforcement risk if business scope creeps post-licensing. |
| Cryptographic proof | Not addressed, MAS has issued no guidance on accepting on-chain proofs as attestation substitute | Regulatory gap: continuous verification is technically possible but has no defined status under the framework. |
For a faster scan, the visual below compresses the detailed table into the six operational items issuers need to prepare first.
MAS stablecoin compliance starts with six operational requirements: reserve backing, reserve custody, monthly attestation, annual audit, redemption, and whitepaper disclosure.
Where the MAS Framework Creates Residual Compliance Risk?
The MAS framework is well-designed for the regulatory context in which it was written. Monthly attestation by a qualified external audit firm represents the current gold standard for stablecoin reserve verification globally. The problem is not what the framework requires. The problem is what monthly attestation structurally cannot provide.
An attestation is a point-in-time snapshot. An accounting firm checks the books on a given date, signs off, and publishes the result. From that date, the attestation tells holders and MAS what the reserve position looked like at one moment. It does not tell them what happens between cycles.
Stablecoin supply moves continuously. Reserve assets are held at custodians where positions can change. The gap between monthly attestations, 29 days in a 30-day month, is a period of unverified reserve status. This is not a criticism of MAS's framework. It reflects a structural limitation of periodic human-attested reporting applied to assets that move in real time.
MAS has explicitly not addressed cryptographic proof mechanisms. The research on stablecoin reserve verification across EU, Singapore, and Hong Kong reveals a consistent pattern: all three jurisdictions are silent on whether Merkle tree proofs, proof-of-reserves protocols, or Zero-Knowledge Proofs can supplement or substitute for traditional auditor attestation. The EU's MiCA framework, the MAS SCS framework, and Hong Kong's Stablecoins Ordinance share this regulatory silence.
This silence is consequential for compliance strategy. Issuers cannot replace MAS-required attestation with cryptographic proof, the framework does not permit that substitution. But they can layer cryptographic verification on top of the attestation cycle to address the 29-day gap that traditional attestation leaves unresolved.
The practical question for compliance officers is whether monthly attestation is sufficient to satisfy the spirit of the framework, or whether the incoming legislation will raise the standard. MAS's language in the August 2023 framework specifies that reserves must be maintained at 100% "at all times." Not at attestation date. At all times.
Monthly attestation satisfies the formal reporting requirement. Whether it satisfies the substantive obligation, that reserves actually exist at the mandated level continuously, is a question that point-in-time reporting cannot answer.
What Changes When Legislation Takes Effect in Mid-2026?
The Payment Services Act amendment will formalize the SCS framework as binding statute. The immediate operational implications for issuers currently building against the framework are primarily procedural: formal licensing, formal enforcement powers, and formal penalties rather than informal guidance.
But there are structural implications that compliance teams should model now.
MAS has signaled that the forthcoming legislation may introduce requirements that the finalized framework does not yet specify. The Singapore FinTech Festival 2025 remarks from MAS Managing Director Chia Der Jiun indicated draft legislation would be published in 2026, with details to follow. Issuers that have built minimum-viable compliance infrastructure against the August 2023 framework may find themselves underbuilt against the statutory version.
The comparison to Hong Kong is instructive. Hong Kong's Stablecoins Ordinance, effective August 2025, introduced daily reserve statements and weekly reporting requirements on top of regular independent attestation, requirements significantly more demanding than the pre-legislative framework suggested. MAS has historically maintained a principles-based approach that is less prescriptive than HKMA, but the direction across APAC is toward more frequent reporting, not less.
StraitsX's voluntary twice-monthly attestation cadence reflects this directional logic. Leading issuers are building toward a compliance standard that may be mandated, not toward the minimum that is currently required.
How Does zkDatabase Enable Continuous Reserve Verification?
Verifiable compliance for stablecoin issuers requires solving the attestation gap without replacing the external audit firm relationship that MAS mandates.
zkDatabase, Orochi Network's Verifiable Database Powered by Zero-Knowledge Proofs, addresses this at the data layer. The mechanism: reserve data flows from authenticated custodian accounts into a verifiable data pipeline, where each committed data state can generate a cryptographic proof. That proof can be verified on-chain by smart contracts or published for third parties to check, depending on the deployment model, without exposing the underlying reserve composition data.
The result is continuous proof of reserve status between monthly attestation cycles. On the 15th of the month, the midpoint between attestations, issuers using zkDatabase can demonstrate that reserve data has not been altered since the last attestation date. On any randomly selected business day, the cryptographic proof answers the question that monthly attestation cannot: what does the reserve look like right now?
This is relevant to the MAS framework in a specific way. The August 2023 framework requires reserves to be maintained "at all times." Monthly attestation satisfies the reporting obligation. Continuous cryptographic proof addresses the substantive gap, the 29 days between attestations when reserve status is formally unverified.
Zero-Knowledge Proofs make this possible without introducing new privacy risk. zkDatabase's proof architecture, using Groth16, a battle-tested ZKP proof system producing 192-byte proofs verifiable at approximately 200,000 gas on EVM, proves facts about the reserve data without exposing the underlying composition. A counterparty, regulator, or holder can verify that reserves exceed the required threshold without learning which specific assets constitute those reserves.
This is not a replacement for MAS-required monthly attestation. It is a continuous verification layer that closes the gap the attestation model leaves open.
Understanding how off-chain to on-chain data provenance works is essential context: reserve assets exist off-chain at custodian institutions. The challenge is making committed reserve state verifiable on-chain without trusting any single intermediary's report alone. zkDatabase's verifiable data pipeline connects authenticated custodian data to on-chain proof while reducing the trust assumption at the data layer.
Conclusion
The MAS SCS framework is clear, principles-based, and operationally achievable for well-resourced issuers. The five core requirements, 100% reserve backing, monthly independent attestation, annual audit, par-value redemption within five business days, and business scope restriction to stablecoin issuance, set a standard that is demanding but definable.
The structural gap is not in the framework's design. It is in the technology available to compliance officers when the framework was written. Monthly attestation was the best available mechanism for reserve verification in 2023. It remains the regulatory standard in 2026. But the infrastructure now exists to close the gap between attestation cycles, continuously, cryptographically, without replacing the external audit relationship that MAS requires.
For issuers preparing for mid-2026 legislation, the compliance question is not only whether monthly attestation is achievable. It is whether attestation alone is sufficient to demonstrate that reserves exist at 100% not just on attestation date, but at all times, as the framework specifies.
100% backing, verified once a month. The other 29 days: trust. zkDatabase provides the continuous proof that removes the trust assumption from that gap.
If you are a compliance officer or founder building toward MAS SCS licensing, contact Orochi Network to understand how zkDatabase integrates with your existing attestation infrastructure to provide continuous cryptographic proof of reserve status.
FAQ
Q1: What does the Singapore MAS Stablecoin Framework require for reserve backing?
MAS requires Single-Currency Stablecoin issuers to maintain 100% par-value reserve backing at all times. Eligible assets are restricted to cash, cash equivalents, and government debt securities with residual maturity of no more than three months and a minimum AA- credit rating. Assets must be held in segregated accounts at Singapore-licensed financial institutions or qualifying overseas custodians.
Q2: Does monthly attestation satisfy MAS's requirement that reserves be maintained "at all times"?
Monthly attestation satisfies the formal reporting obligation under the MAS SCS framework. It does not provide verification of reserve status between attestation cycles, typically 29 days per month. MAS has not issued guidance on whether cryptographic proof of reserves can supplement or substitute for traditional attestation. The gap between formal compliance and continuous verification is where reserve risk concentrates.
Q3: When will the MAS stablecoin legislation take effect, and how does it differ from the existing framework?
Formal Payment Services Act amendments are expected mid-2026. The August 2023 framework will be converted into binding statute. The specific legislative requirements have not yet been published in full. MAS has signaled that draft legislation will provide additional detail. Leading issuers are building beyond the minimum framework requirements in anticipation of a more demanding statutory standard.
Q4: Can Zero-Knowledge Proofs replace the MAS-required external audit firm attestation?
No. MAS requires independent attestation by an external audit firm. Zero-Knowledge Proofs, including zkDatabase's continuous cryptographic proof of reserve status, are not a substitute for this requirement under the current framework, MAS has issued no guidance accepting cryptographic proof in place of traditional attestation. Cryptographic verification operates as a continuous compliance layer on top of the mandatory attestation cycle, addressing the intra-cycle gap rather than replacing the attestation itself.
Q5: What happens to reserve verification requirements when the PSA legislation takes effect?
The legislation will formalize the August 2023 framework as statute, introducing formal enforcement powers and penalties. The specific reserve verification requirements in the statutory version are not yet published. Based on the directional trend across APAC jurisdictions, Hong Kong introduced daily reserve statements and weekly reporting in its Stablecoins Ordinance, compliance teams should model for more frequent reporting obligations in the statutory version, not fewer.
Related toStablecoin
