Stablecoin treasury management on Arc: the operational questions

This guide is about the operational side of holding USDC as a corporate treasury asset on Arc — custody structure, moving funds between accounts, converting between currencies, and reconciling balances against your books. It is deliberately not about yield, interest, or returns on idle USDC — that's a separate question with a separate set of risk considerations, covered at arcyield.app. If you arrived here looking for APY comparisons, that's the link you want; this guide covers what happens before and after the yield question, not the yield question itself.

Why treasury and yield are different questions

It's worth stating plainly why this guide draws that line, because the two get conflated constantly in stablecoin marketing. Treasury operations — how you hold funds, move them, convert them, and account for them — is infrastructure. It's the same category of decision as choosing a bank and a treasury management system, and it needs to be right regardless of whether you're earning any return on the balance at all. Yield — putting idle USDC into a lending protocol, a money-market position, or a tokenized treasury product to earn a return — is an investment decision layered on top of that infrastructure, with its own credit, smart-contract, and counterparty risk that's independent of the operational question. A treasury team evaluating stablecoin settlement should get the operational layer right first; bolting a yield strategy onto treasury operations that aren't solid is backwards.

Holding: custody structure is the first decision

The same custody spectrum that applies to accepting payments applies to holding a treasury balance, and it's worth reconsidering deliberately rather than inheriting whatever your payment provider defaults to. A qualified custodian holds the asset on your behalf under a defined regulatory and fiduciary framework — the closest analog to how most corporate treasuries already think about custody for other assets. MPC-based self-custody infrastructure splits key material so no single point of failure can move funds unilaterally, without necessarily involving a third-party custodian. Fully self-directed custody — your own infrastructure, your own keys — offers the most control and the most operational burden, including building or buying your own transaction monitoring and internal-controls tooling. Built on Arc's wallets & custody category tracks named custody providers with a stated or confirmed relationship to Arc or Circle's broader ecosystem; verify each provider's actual scope directly rather than assuming general industry reputation extends to an Arc-specific claim.

The right answer here scales with balance size and internal control requirements, not with what's fastest to set up. A treasury team that already has an institutional custody relationship for other assets should ask that provider directly about USDC and Arc-specific support before evaluating anyone new.

Moving: internal transfers and multi-entity structures

For a business with multiple legal entities, subsidiaries, or operating accounts, moving USDC between them is functionally similar to an internal wire today, with two structural differences worth planning around. First, on-chain transfers are visible on a public (or in Arc's case, permissioned-validator but still transparent) ledger — this has real implications for how much transaction-level detail becomes externally observable, and it's worth understanding what's visible via a block explorer before assuming internal transfers are private the way an internal bank transfer typically is. Second, moving funds between entities in different jurisdictions may still trigger the same intercompany-transfer, transfer-pricing, and reporting obligations that a traditional wire would — the settlement rail changing doesn't change the underlying corporate and tax structure sitting on top of it. This is not a regulatory position this guide is qualified to state definitively for your situation; get that confirmed with your own tax and legal counsel rather than assuming a stablecoin transfer is somehow outside existing intercompany-transfer rules.

Converting: USDC, EURC, and fiat legs

A treasury holding USDC that also transacts in other currencies has a genuine currency-conversion problem to solve, structurally similar to any multi-currency treasury operation but executed differently. Circle also issues EURC, a euro-denominated stablecoin that, as of 2 Sep 2026, has a published contract address on Arc testnet (mainnet addresses were not yet published as of that date). Converting between USDC and EURC, or between either and fiat, can happen through an on-chain automated market maker, an OTC desk, or a payments provider's built-in conversion — each with a different spread and a different counterparty structure. Built on Arc's FX on Arc guide covers where that spread actually sits and who's quoting it in more depth; Built on Arc's EURC guide covers EURC specifically, including its MiCA status.

Reconciling: matching on-chain activity to your books

This is the least glamorous part of stablecoin treasury operations and the part most likely to be under-resourced in an initial pilot. On-chain transactions are identified by address and transaction hash, not by counterparty name or internal account code — matching a given transfer to the internal ledger entry it corresponds to requires either disciplined use of memo/reference fields at the point of transfer, or a treasury management or custody provider that builds that mapping for you. Ask any provider directly: does their reporting export in a format your existing accounting or ERP system can ingest, or will you need custom tooling to translate on-chain activity into journal entries? A treasury operation that can move funds quickly but can't reconcile them cleanly has traded one operational problem for another, not solved one.

Counterparty and structural risk, stated plainly

Holding USDC as a treasury asset carries counterparty exposure to Circle as the issuer — the same category of question a treasury team already asks about any money-market fund or bank deposit, just with a different issuer and a different regulatory wrapper. Circle publishes reserve attestations for USDC; a treasury team should review those directly rather than relying on secondary summaries, and should apply the same due-diligence standard it would apply to any other cash-equivalent holding. This guide does not state a view on USDC's reserve adequacy or credit quality — that's a judgment for your own treasury and risk function, informed by Circle's own disclosures.

What a pilot treasury structure actually looks like

Concretely, a first stablecoin treasury pilot should specify, in writing, before any balance moves: who holds custody and under what agreement; what the internal approval and multi-signature (or equivalent) process is for any transfer above a defined size; how conversions between USDC, EURC, and fiat are executed and at what expected spread; and how reconciliation happens on a defined cadence (daily, weekly) against the general ledger. None of this is exotic relative to standard treasury-management discipline — it's the same discipline applied to a new settlement rail, which is exactly the right way to approach it rather than treating stablecoin treasury as a fundamentally different category of risk management.

Built on Arc is an independent directory. Arc is a Circle product; we are not affiliated with, endorsed by, or operated by Circle.

Sources: - Circle Announces Founding Validator Cohort and Major Integrations for Arc - Arc Docs — contract addresses - Arc | The Economic OS — official site