What Does FINMA Require of Foreign Crypto Custodians?
FINMA Guidance 01/2026 sets out Swiss supervisory expectations for custody of cryptobased assets. For relevant foreign custody arrangements, the test is not only whether the provider is supervised: local law must also protect client assets if that custodian becomes insolvent.
TL;DR — Key Takeaways
- ✓Two-part test: Foreign custody requires equivalent prudential supervision and equivalent bankruptcy protection where the guidance's test applies.
- ✓Portfolio managers: They remain responsible for careful custodian selection and client-asset safekeeping.
- ✓Narrow exception: Some existing arrangements may continue only with risk disclosure, alternatives and documented written consent.
- ✓Not an investment endorsement: Compliant custody does not remove cryptoasset volatility or investment risk.
Foreign Custody Has Two Separate Legal Gates
For the foreign-custody equivalence test, FINMA requires both prudential supervision of the custodian and bankruptcy protection under foreign law for the cryptoassets held there.
That distinction matters for banks, asset managers and tokenized-asset structures that rely on a global custody chain. A license or regulatory status answers who supervises the provider; it does not, by itself, answer whether clients can reclaim segregated assets in an insolvency.
For foreign third-party custody, the exemption applies by analogy only if the custodian is prudentially supervised and foreign law guarantees bankruptcy protection.
— FINMA Guidance 01/2026, section 3.1
The practical task is therefore jurisdictional: document the provider's supervision and obtain a defensible view of the insolvency treatment of the assets, not just the contract language.
The Swiss Portfolio Manager Keeps Responsibility
FINMA says the institution managing a client's portfolio remains responsible for appropriate safekeeping, even when custody is delegated to a foreign provider.
For individual portfolio management, FINMA calls for a prudentially supervised custodian with suitable technical infrastructure and expertise, plus the ability to segregate assets if the custodian fails. Foreign arrangements also require equivalent supervision and insolvency protection under local law.
This is a control-chain issue: an issuer may select a token platform, but the regulated manager still needs to establish where keys and assets sit, which legal entity holds them and what happens at each insolvency boundary. Our guide to custody of tokenized securities for advisers covers the separate U.S. framework.
An Exception Requires More Than a Contractual Promise
FINMA allows a narrow exception for certain existing arrangements that lack one of the usual safeguards, but only with documented client protections.
For the specified portfolio-management cases, the institution must prove that it explained the heightened custody risk, informed clients about suitable alternatives in Switzerland and abroad, and recorded the client's written consent to use or retain the unsuitable provider.
FINMA lists three cumulative steps: comprehensive risk information, information about suitable alternatives and documented written client consent.
— FINMA Guidance 01/2026, section 3.2
The exception is not a blanket cure for weak custody. It is limited to the described arrangements and does not transfer the institution's client-protection duty to the client.
Fund Assets and Crypto ETP Collateral Have Their Own Rules
The guidance does not impose one identical custody route on every product: Swiss collective assets generally use a Swiss custodian bank, while crypto ETP collateral must also have legally effective protection if its custodian becomes insolvent.
A Swiss custodian bank may delegate fund safekeeping where the statutory conditions are met; investors must be told about transfer risks. For crypto ETPs, FINMA says real security requires legal protection in the event that the collateral custodian itself becomes insolvent.
Product documents, custody mandates and the operational ledger should describe the same asset location and rights. A token balance on a platform cannot replace the legal analysis of the underlying custody relationship.
A Custody Review Should Produce Evidence, Not Assumptions
A usable FINMA review records the custody entity, its prudential supervisor, the governing insolvency law and the legal route for separating client assets.
- Map each asset and private-key control point to a legal entity and jurisdiction.
- Verify prudential status and the scope of the custodian's authorization.
- Obtain jurisdiction-specific evidence of segregation and bankruptcy treatment.
- Record delegation oversight, incident controls and client disclosures.
FINMA's January guidance makes the core point concrete: technology controls and legal segregation are complementary, not interchangeable. Institutions designing the full tokenized-asset lifecycle should make custody rights explicit at issuance and preserve them through transfers.
Frequently Asked Questions
What does FINMA Guidance 01/2026 cover?
Published on 12 January 2026, it explains Swiss supervisory expectations and risks for institutions that custody cryptobased assets, including foreign delegation, client portfolios, funds and crypto ETPs.
Can a Swiss institution use a foreign crypto custodian?
Yes, subject to the applicable regime. For portfolio-management assets, FINMA says the foreign custodian must have equivalent prudential supervision and foreign law must provide equivalent bankruptcy protection.
Is supervision alone enough for foreign custody?
No. FINMA's guidance treats prudential supervision and bankruptcy protection as cumulative conditions for the relevant foreign-custody equivalence test.
What if an existing custody arrangement falls short?
In a narrow exception for individual portfolio management, the manager must disclose increased risks, identify suitable alternatives and document the client's written consent to the unsuitable custodian.
Does compliant custody make cryptoassets safe investments?
No. FINMA separately warns that cryptoassets remain highly volatile and speculative, and investors can suffer substantial losses.