
Briefing
The European Securities and Markets Authority (ESMA) has issued definitive guidance under the Markets in Crypto-Assets Regulation (MiCA), explicitly prohibiting Crypto-Asset Service Providers (CASPs) from staking clients’ crypto-assets for the CASP’s own proprietary account. This action immediately tightens the operational perimeter for all EU-regulated digital asset firms, establishing that the commingling of client assets for yield generation constitutes a violation of core segregation principles. The primary consequence is the mandate for firms to implement a clean architectural separation between client-owned assets and firm capital, ensuring compliance with MiCA’s strict custody requirements, particularly Articles 70 and 75, which govern asset safeguarding.

Context
Before this clarification, a significant legal ambiguity persisted regarding the classification of staking activities under the nascent MiCA framework. Industry participants debated whether staking client assets, even with explicit consent, constituted a permissible form of service or an impermissible commingling of funds that violated existing client asset protection laws. This uncertainty allowed some CASPs to integrate staking yield into their operational models, effectively utilizing client capital as a source of proprietary revenue. The prevailing compliance challenge centered on whether client consent could override the fundamental regulatory requirement for a qualified custodian to maintain “possession or control” without using the assets for its own benefit.

Analysis
This guidance necessitates a critical update to the operational compliance frameworks of all CASPs engaged in staking. The prohibition fundamentally alters the product structuring for staking-as-a-service offerings, requiring firms to transition to an agency model where the client retains full beneficial ownership and the CASP acts only as a technical facilitator. This shift impacts capital requirements and risk mitigation controls; CASPs must now demonstrate that their internal systems prevent the automated transfer or use of client private keys for the firm’s own staking pool.
Furthermore, the guidance classifies pre-funding client orders with client crypto-assets as “sub-custody,” mandating full compliance with the rigorous liability and governance standards of MiCA’s custody articles. This ruling ensures that the integrity of client asset segregation is maintained at all times, irrespective of the service offered.

Parameters
- Regulatory Authority → ESMA (European Securities and Markets Authority).
- Governing Regulation → Markets in Crypto-Assets Regulation (MiCA) Articles 70 and 75.
- Core Prohibition → CASP proprietary staking of client crypto-assets, even with client consent.
- Secondary Classification → Pre-funding client orders with client assets is classified as sub-custody.

Outlook
The ESMA guidance sets a clear, conservative precedent for client asset protection within the EU, signaling a low tolerance for operational models that blur the line between custodian and principal. This interpretation is likely to be adopted as a global standard, influencing jurisdictions currently drafting their own digital asset legislation, such as the UK and parts of Asia, by establishing a high-water mark for segregation. The next phase involves National Competent Authorities (NCAs) integrating this guidance into their supervisory practices, with an expected increase in scrutiny during CASP authorization reviews. Firms must prioritize system audits to confirm their staking infrastructure is legally compliant before the full MiCA authorization deadline.
