USDT vs USDC: Which Stablecoin Should GCC Businesses Accept?
USDT leads GCC OTC volume; USDC is gaining institutional ground. What GCC CFOs need to know about reserves, regulation, and which stablecoin fits cross-border settlement.
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GCC businesses settling cross-border payments via stablecoin rails face a choice between two USD-pegged instruments that look identical on the surface but differ materially in issuer, reserve structure, and regulatory status. USDT, issued by Tether Limited, is the dominant stablecoin by market cap and OTC liquidity globally. USDC, issued by Circle Internet Financial, has stronger US regulatory alignment and is now surpassing USDT in large-value institutional settlement volume. Which fits your business depends on your corridor, your counterparties, and, critically if you operate in the UAE, what each is legally permitted to be used for.
What is the difference between USDT and USDC?
Both USDT and USDC are USD-pegged stablecoins designed to hold a 1:1 value with the US dollar. The differences lie in who issues them, what backs the peg, and which regulatory frameworks they operate under, distinctions that matter directly to a GCC treasury manager choosing a settlement rail.
USDT (Tether) is issued by Tether Limited, incorporated in the British Virgin Islands. It is the oldest and largest stablecoin by market capitalisation, approximately $186–190 billion in circulation as of mid-2026. USDT dominates global OTC markets and emerging-market cross-border payment flows. Reserves include US Treasuries (~$120 billion+), cash and cash equivalents, and a smaller exposure to Bitcoin and gold.
USDC is issued by Circle Internet Financial, a US-incorporated company regulated in the United States. Market cap of approximately $75–76 billion in mid-2026. USDC reserves are held primarily in the Circle Reserve Fund - a SEC-registered government money market fund managed by BlackRock - plus cash at US-regulated banks. No gold or Bitcoin exposure in the reserve composition.
The structural distinction: Tether is a BVI-registered entity; Circle is a US-regulated company. This becomes directly relevant under the GENIUS Act and under jurisdictional compliance requirements for counterparties with US banking relationships.
How do USDT and USDC reserves and attestations compare?
Neither USDT nor USDC has historically undergone a full financial audit. Both publish attestation reports, point-in-time verifications of reserve balances by a named accounting firm. An attestation is not an audit: it confirms that the stated balances exist at a specific date, but does not review internal controls, operational risk, or issuer governance.
USDT: Quarterly attestations by BDO Italia. The Q1 2026 attestation reported total assets of $191.77 billion against total liabilities of $183.54 billion, giving net equity of approximately $8.23 billion. In 2026, Tether engaged KPMG to conduct its first full financial statement audit, a material step toward institutional-grade transparency that has not previously been available. (Tether Transparency Report, tether.to/transparency; BDO Italia, Q1 2026)
USDC: Monthly attestations by Deloitte. The May 2026 attestation reported $76.7 billion in reserves backing $76.5 billion in circulation. Higher attestation frequency. Reserves held in lower-risk instruments, a SEC-registered government money market fund plus cash at regulated US banks, with no speculative asset exposure. (Circle Transparency, circle.com/transparency)
The practical implication: USDC has more frequent disclosures and a cleaner, lower-risk reserve composition. USDT has significantly larger market depth and OTC desk liquidity, which matters for GCC businesses executing large transactions with minimal slippage.
(Sources: KuCoin Research, June 2026; CoinLaw.io, 2026; Circle Transparency; Tether Transparency)
How does the GENIUS Act affect USDT and USDC for GCC businesses?
The GENIUS Act - the Guiding and Establishing National Innovation for U.S. Stablecoins Act - was signed into US law on July 18, 2025, with bipartisan support: Senate 68–30, House 308–122. It establishes the first federal regulatory framework for payment stablecoin issuers in the United States. The Act is currently in rulemaking phase, the OCC and US Treasury have issued notices of proposed rulemaking, with final rules not yet published as of July 2026. The Act's effective date is 18 months from enactment (January 2027) or 120 days after final rules, whichever is earlier. (Congress.gov S.1582; OCC Bulletin 2026-3)
Why it matters for a GCC business, specifically: Circle, as a US-incorporated entity, is the natural primary regulated issuer under the GENIUS Act's "permitted payment stablecoin issuer" framework. Tether, registered in the British Virgin Islands, does not currently meet the definition of a permitted US payment stablecoin issuer under the Act as drafted, its path to US regulatory recognition under this framework remains unresolved.
The counterparty risk implication: US-based correspondent banks and institutional partners are increasingly moving toward requiring GENIUS Act-compliant stablecoins for USD-denominated settlement. A GCC business with US banking relationships, US-dollar payment corridors, or institutional counterparties subject to US compliance requirements should factor this trajectory into its stablecoin selection. The full effect will crystallise when final GENIUS Act rules are published.
Which stablecoin is more widely used for GCC cross-border settlement?
USDT remains the dominant stablecoin by market cap, transaction count, and OTC desk liquidity globally. In GCC and emerging-market cross-border payment flows, USDT is the primary instrument, driven by its early-mover position, deep OTC market, and availability across virtually every exchange, corridor, and payment platform.
The settlement volume picture shifted in mid-2026. For the first time, USDC surpassed USDT in adjusted monthly settlement volume: approximately $1.21 trillion against USDT's $573 billion in June 2026. (KuCoin Research, June 2026) This reflects institutional and corporate treasury adoption of USDC for large-value settlement in regulated markets, particularly in the US and EU where compliance requirements favour a US-regulated issuer.
By transaction count, USDT still leads substantially: approximately 145 million monthly transactions against USDC's 57 million. (KuCoin Research, H1 2026). The divergence is meaningful: USDT dominates by number of transactions, high-frequency, smaller-value payments; USDC now leads by value, fewer, larger institutional settlements.
In the UAE specifically, Circle secured a full Financial Services Permission from ADGM's FSRA in December 2025, enabling USDC-denominated payment and settlement services for institutional clients in Abu Dhabi. Standard Chartered and BNY Mellon are among the institutional participants onboarded to USDC infrastructure in that market. (Circle press release, December 2025)
What does UAE and GCC regulation say about businesses accepting stablecoins?
CBUAE Payment Token Services Regulation - mandatory compliance disclosure. Under the Central Bank of the UAE's Payment Token Services Regulation (PTSR), the transition period ended June 2025. From that date, UAE merchants and businesses may only accept CBUAE-approved dirham stablecoins as payment for goods and services. Foreign payment tokens, including USDT and USDC, may only be used in the UAE to pay for virtual assets or their derivatives. Neither USDT nor USDC appears on the CBUAE approved foreign payment token list as of July 2026. This is a binding regulatory requirement, not guidance. (CBUAE PTSR; Pinsent Masons analysis, pinsentmasons.com)
As of July 2026, approved UAE payment tokens include CBUAE-approved AED-backed stablecoins. USDU, issued by Universal Digital, received CBUAE approval in January 2026 as the first approved USD-backed stablecoin in the UAE. (CoinDesk / Ledger Insights, January 2026)
What this means for UAE businesses: A UAE-registered business cannot legally accept USDT or USDC from clients as payment for goods or services. The restriction applies to merchant-facing, commercial payment acceptance.
Cross-border B2B settlement context: The PTSR merchant acceptance restriction applies to point-of-sale and customer-facing payment acceptance. USDT and USDC continue to be used as settlement rails between licensed financial intermediaries - PSPs, exchange houses, and payment platforms - in interbank-style transactions. The PTSR does not remove either stablecoin from those settlement flows.
Bahrain: The CBB licenses crypto-asset service providers under its Crypto-Asset Module. CBB Category 3 licensees may trade accepted crypto-assets as principal, enabling fiat-to-USDT conversion for cross-border payment settlement. Bahrain does not have an equivalent PTSR merchant acceptance restriction as of July 2026.
How does ARP Digital use stablecoins for GCC cross-border settlement?
ARP Digital holds a CBB Category 3 licence, issued under CBB Rulebook Vol. 6, Crypto-Asset Module (CRA-1.1.13), authorising trading in accepted crypto-assets as principal, which enables institutional-grade fiat-to-stablecoin conversion for payment settlement.
FLOW Convert is ARP's OTC conversion product. GCC businesses, exchange houses, and PSPs convert fiat currency to USDT at institutional OTC pricing, without the bid-ask spread and market impact that public exchange execution carries at large transaction sizes. For context on what exchange slippage costs at $500K and $1M transaction sizes, that analysis covers the cost differential between OTC and exchange execution directly.
The CBUAE PTSR merchant acceptance restriction does not apply to ARP's settlement operations between licensed financial entities, it applies to merchant point-of-sale acceptance. ARP's cross-border settlement activity operates in the B2B licensed intermediary layer, not in the merchant-consumer payment layer.
For GCC businesses that have selected their stablecoin and need the settlement infrastructure to execute it, how cross-border B2B settlement works via ARP GPS covers the settlement mechanics.
See how FLOW Convert works for GCC businesses →
Frequently Asked Questions
What is the difference between USDT and USDC?
USDT is issued by Tether Limited (British Virgin Islands) and has a market cap of approximately $186–190 billion mid-2026. USDC is issued by Circle Internet Financial (US-incorporated) with a market cap of approximately $75–76 billion. Both peg 1:1 to the US dollar. The key differences are issuer jurisdiction, reserve composition (USDC holds no gold or Bitcoin), attestation frequency (USDC monthly, USDT quarterly), and regulatory exposure under US and EU frameworks.
Which stablecoin is safer - USDT or USDC?
Neither carries an explicit government guarantee, and neither has completed a full independent financial audit as of mid-2026. USDC has more frequent reserve attestations (monthly, Deloitte) and a lower-risk reserve composition - a SEC-registered government money market fund and bank cash, with no speculative assets. USDT has engaged KPMG for its first full audit in 2026. For GCC businesses, "safer" depends on the jurisdiction: USDC has stronger US regulatory alignment; USDT has deeper OTC liquidity.
Can UAE businesses accept USDT or USDC as payment?
Nottfor goods and services. Under the CBUAE Payment Token Services Regulation (PTSR), the transition period ended June 2025. UAE businesses may only accept CBUAE-approved dirham stablecoins for commercial payment of goods and services. USDT and USDC are classified as foreign payment tokens and may only be used in the UAE to pay for virtual assets or their derivatives. This is a binding regulatory requirement. (CBUAE PTSR; Pinsent Masons, 2025)
What did the GENIUS Act change for USDT and USDC?
The Guiding and Establishing National Innovation for U.S. Stablecoins Act was signed into law on July 18, 2025, establishing the first US federal framework for payment stablecoin issuers. Circle (USDC) is the natural primary regulated issuer under this framework as a US-incorporated entity. Tether (USDT), registered in the BVI, does not currently qualify as a "permitted payment stablecoin issuer" under the Act. Final rules are in rulemaking phase, effective date is January 2027 or 120 days after final rules. (Congress.gov S.1582)
Which stablecoin has more volume in GCC cross-border payments?
USDT remains dominant by transaction count (~145 million monthly transactions globally vs USDC's ~57 million) and is the primary instrument in GCC and emerging-market OTC payment flows. USDC surpassed USDT in adjusted settlement volume in June 2026 ($1.21 trillion vs $573 billion), reflecting institutional adoption for large-value transfers. USDT leads in transaction frequency; USDC now leads in total value settled. (KuCoin Research, June 2026)
What stablecoin does ARP Digital use for settlement?
ARP Digital uses USDT and USDC as the primary settlement rail within its GPS cross-border settlement infrastructure and FLOW Convert OTC product.FLOW Convert enables GCC businesses to convert fiat to USDT and USDC at institutional OTC pricing under ARP's CBB Category 3 licence, without exchange slippage on public markets.
USDT offers deeper OTC liquidity and broader corridor availability, making it the dominant GCC settlement instrument by transaction count. USDC offers a cleaner reserve composition, higher-frequency attestations, stronger US regulatory alignment, and is now the larger stablecoin by institutional settlement value. The right choice depends on the business's corridor, counterparty requirements, and regulatory jurisdiction. UAE businesses must note that neither stablecoin is currently approved for merchant payment acceptance under the CBUAE PTSR.
ARP Digital's CBB Category 3-licensed OTC desk executes institutional-grade OTC fiat-to-stablecoin conversion for GCC businesses, converting fiat currency to USDT for cross-border settlement without the market impact of public exchange execution. For businesses evaluating licensed GCC settlement infrastructure, ARP Digital's licensed GCC payment infrastructure covers the full service scope.
Learn how FLOW Convert works →
