What Is USDC (USD Coin)

What is USDC and What Backs It?

When asking what USDC is in practical terms, the answer begins with its reserve structure. The stability of any fiat-backed stablecoin depends entirely on the credibility of the assets backing it. A stablecoin that claims to be worth one dollar but holds reserves in illiquid or opaque assets is not the same as one backed by cash and short-duration US Treasury instruments in segregated, audited accounts.

Circle publishes monthly attestation reports from independent auditors confirming the composition of USDC reserves. The reserves are held in segregated accounts at regulated US financial institutions, not on Circle's own balance sheet, not in other digital assets, not in instruments that could lose value quickly if market conditions deteriorate. The structure is designed to ensure that every USDC can be redeemed for exactly one dollar, regardless of market conditions.

This matters for enterprise treasury teams for a straightforward reason: if the stablecoin being used for cross-border settlement can lose its dollar peg, the payment infrastructure becomes a source of FX risk rather than a solution to it. USDC's reserve transparency and regulatory positioning are why it has become the preferred stablecoin for institutional and regulated payment flows rather than simply the most liquid one.

Where USDC Runs

USDC is issued natively on multiple blockchain networks, which affects transaction speed, cost, and the payment corridors it works best for:

• Ethereum: the most widely supported network for institutional USDC use, with deep liquidity and broad integration across payment platforms and exchanges. Transaction fees vary with network congestion and can be higher than other chains during peak periods
• Solana: sub-second confirmation times and very low transaction fees, making it well-suited for high-volume payment flows where speed and cost per transaction matter
• Base: Coinbase's Ethereum layer-2 network, offering lower fees than mainnet Ethereum while maintaining broad compatibility
• Stellar and Algorand: used in specific cross-border payment corridors, particularly in emerging markets where local integration with these networks exists

For enterprise payment infrastructure, the choice of network is an operational decision, one that payment platforms typically abstract away from the treasury team. What matters to the finance function is that USDC on any of these networks settles with finality in seconds, produces a consistent on-chain transaction record, and maintains its dollar peg throughout the process.

USDC in a Cross-Border B2B Payment

A procurement team at a Dutch manufacturer needs to pay a component supplier in South Korea. Under a stablecoin payment model using USDC, the flow looks like this:

The Dutch company's euros hit the on-ramp, converted to USDC at a defined rate. The USDC moves on-chain to the recipient address, settlement confirmed in seconds. The Korean supplier's off-ramp converts USDC to Korean won and credits their bank account through local payment rails. The on-chain record is complete, timestamped, and identical for both parties the moment it confirms.

The Dutch company sent euros. The Korean supplier received won. USDC handled the cross-border settlement, the part that would otherwise take two to five business days through a correspondent banking chain, in under a minute. Neither party held USDC on their balance sheet. It was infrastructure, not an asset class.

USDC vs USDT for Enterprise Use

USDC and USDT are both dollar-pegged stablecoins used in enterprise payment flows, but they are not interchangeable for compliance-sensitive treasury operations.

USDT, issued by Tether, is the highest-volume stablecoin globally and has broader liquidity across payment corridors, particularly in markets where USDC penetration is thinner. For payment platforms routing into certain emerging market corridors, USDT's liquidity depth is operationally relevant.

USDC's advantage is transparency. Circle's reserve attestation process, its US regulatory positioning, and its explicit design for institutional use make it easier for corporate compliance teams to sign off on. For a treasury team whose third-party risk policy requires documented reserve transparency from counterparties, USDC provides that documentation in a form that USDT's reserve history has not consistently matched.

In practice, enterprise payment platforms use both USDC, where reserve transparency and regulatory positioning are the priority, and USDT, where liquidity depth in specific corridors matters more. The stablecoin is a settlement infrastructure; the choice of which one depends on the payment corridor and the compliance requirements of the parties involved.

How Merge Uses USDC

Merge uses USDC as one of its primary settlement instruments for cross-border B2B payments, with the USDC managed within Merge's regulated custody infrastructure, meaning enterprise clients don't hold or manage USDC directly. Merge Transfer handles the full payment flow, including the USDC settlement.