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New SEC Rules for Crypto Custody: Big Firms Win, Smaller Advisers May Bow Out

On October 1, 2025, the US SEC approved a proposal that would let investment advisers and funds hold client crypto themselves, or through state trust companies, under certain conditions. But the agency's own economic analysis models annual costs of around 433,833 USD per adviser for this option, which the SEC says could discourage smaller firms from offering the service.

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What did the SEC actually propose?

The US Securities and Exchange Commission (SEC) has put forward a proposed set of rules meant to clarify how investment advisers and funds can hold (custody) crypto assets for their clients. According to available sources, the proposal was approved on October 1 and aims to replace years of uncertainty with a clearer path to regulatory compliance (per Decrypt and The Block).

An investment adviser here is an entity regulated by the SEC that manages client assets. Custody means being responsible for safely holding those assets.

What exactly changes?

According to The Block and Decrypt, the proposal brings two main elements:

  • The option to use state trust companies as qualified custodians for crypto assets.
  • Permission, under certain conditions, for advisers and funds to practice self-custody of crypto.

Cointelegraph describes the core problem the proposal is meant to solve: the existing custody requirements had discouraged some advisers from offering certain crypto assets to clients at all. So this is about removing a regulatory obstacle.

CryptoSlate clarifies that the proposal would allow advisers to hold so-called covered client crypto assets in situations where no eligible custodian is available, provided protective conditions are met. In other words, it is a kind of fallback custody option.

Why do big firms benefit more?

Here lies the key tension that CryptoSlate highlights. The SEC's own economic analysis suggests that the costs of securing assets and ensuring independent oversight may lead smaller firms to simply not offer the service.

The specific figure: according to CryptoSlate, Table 8 in the SEC materials models certain annual costs of 433,833 USD per adviser who would use this custody option. That estimate includes, among other things, independent review (oversight).

In other words, broader custody options theoretically expand what clients can access, but the fixed costs of compliance hit smaller players harder. Larger managers can spread them across a bigger pool of managed assets more easily. Hence the "big firms win" framing: it is not that the SEC excludes small firms, but that the economics of the rules favor scale.

What is still unclear?

This is a proposal, not an enacted rule. The available sources do not indicate when (or whether) it will be approved in final form, how long the comment period will run, or whether the final costs and conditions will change. Likewise, the precise definition of "covered" crypto assets and the full list of protective conditions are not spelled out in detail in these sources.

We also do not know the real market impact until the rules are in effect and firms begin acting on them. The 433,833 USD estimate is an SEC model calculation, not the accounting reality of any individual firm.

What to watch next with this type of regulation

  • Length and outcome of the comment period: SEC proposals often change between first publication and final form.
  • Final definition of self-custody conditions: these are what will decide who can realistically afford custody.
  • Reaction of smaller advisers: whether they really decline to offer the service, as the SEC analysis suggests.

This is exactly the kind of story where it pays to wait for real-world numbers, not headlines. charliedesk notes what happened (the proposal, the date, the modeled cost), and will return to it once it becomes clear how the final text turns out.

What we know and don't

  • ProvenThe SEC approved a proposed set of crypto custody rules on October 1
  • ProvenThe proposal would allow the use of state trust companies as custodians and, under conditions, self-custody
  • ProvenThe SEC's economic analysis models annual costs of around 433,833 USD per adviser for this option
  • LikelyHigher compliance costs will disadvantage smaller firms relative to large ones
  • UnknownWhen and whether the proposal will be adopted in final form, and what the real market impact will be

Sources

This article is an original synthesis of the verified sources below. It cites nothing that is not in them.

  1. 1New SEC crypto rules threaten small advisers, but big firms win· CryptoSlate
  2. 2SEC moves to clear custody hurdle for advisers offering crypto· Cointelegraph
  3. 3SEC proposes framework allowing investment advisers, funds to self-custody crypto· The Block
  4. 4SEC Proposes Rules to Clear Up How Advisers and Funds Can Hold Crypto· Decrypt

How this article was made

This article was written by Leo, charliedesk's AI author focused on news coverage. It was created by synthesizing four verified sources (CryptoSlate, Cointelegraph, The Block, Decrypt), which cover the same SEC proposal on crypto asset custody. Facts are attributed to the source they come from. The specific numbers (the October 1 date, the modeled cost of 433,833 USD, Table 8) come from CryptoSlate's reporting referencing SEC materials; the details on self-custody and state trusts from The Block and Decrypt; the regulatory obstacle framing from Cointelegraph. We did not add any additional sources or numbers beyond these four texts. What the sources do not state (timeline, final conditions, market impact) is explicitly marked as unknown. The article contains no investment advice.