USDC vs USDT: Which Stablecoin Should Merchants Accept?

Both hold a dollar. Both settle in seconds on the right network. Both remove the volatility problem that stops most businesses accepting crypto at all. Yet the USDC vs USDT question generates more merchant hesitation than almost any other decision in crypto payments, usually framed as “which one is safer.”

That framing is too narrow. For a business receiving payments, the practical differences are liquidity, network availability, transfer cost and regulatory posture – and the answer for most merchants turns out not to be either/or.

What Each Stablecoin Is?

Both are dollar-pegged tokens, but they come from organisations with different structures and different philosophies about disclosure.

USDT (Tether) launched in 2014 and is the older and larger of the two. It is issued by Tether, and its scale is its defining feature: it has by far the deepest liquidity across exchanges, the most trading pairs, and the widest presence in global payment corridors – particularly in emerging markets, where it functions as informal dollar access.

USDC (USD Coin) launched in 2018, issued by Circle. It was designed from the start around regulatory alignment and disclosure, with reserves held in cash and short-duration US Treasuries through a managed reserve fund, and monthly attestations from a major accounting firm.

The simplest summary: USDT optimised for reach, USDC optimised for transparency. Both peg to the dollar, and both have held that peg through multiple market stress events.

Reserves and Transparency

This is where the “which is safer” question actually lives, and it deserves specifics rather than reputation.

USDC reserves sit in bank deposits and the Circle Reserve Fund – a government money market fund managed by BlackRock, holding short-term US Treasuries, overnight Treasury repurchase agreements and cash. Circle publishes monthly attestations verified by an independent accounting firm. The composition is deliberately boring: cash and near-cash only.

USDT reserves were reported at approximately $191.7 billion as of 31 March 2026, with an excess reserve buffer of about $8.23 billion. Tether’s June 2026 report recorded roughly $183.6 billion of tokens issued against $187.8 billion of assets. The composition is broader than USDC’s – alongside Treasuries it includes bitcoin, gold, secured loans and other investments.

The distinction that matters for a merchant is not “backed or unbacked” – both report full backing. It is what the reserves are made of. USDC’s holdings are cash-equivalent and redeemable on demand. USDT’s include assets whose value can move, which is a different risk profile even at full collateralisation.

For a business holding stablecoins overnight, that difference is modest. For one holding significant working capital in them for months, it is worth a conversation with whoever manages your treasury.

Market Size and Liquidity in 2026

Scale still favours USDT substantially, but the trend lines are moving in opposite directions.

As of mid-2026, USDT had roughly $183.6 billion in circulation against USDC’s approximately $71.8 billion – USDT remains about two and a half times larger. However, USDC’s market cap reached $75.3 billion, up roughly 72% year over year, marking the second consecutive year it outgrew USDT. Over the same period USDT’s supply contracted slightly, from about $186.8 billion in January 2026 to $183.6 billion.

There is a more interesting figure underneath the headline numbers. Despite its smaller supply, USDC is the highest-volume stablecoin by on-chain transaction count – meaning it is being moved and used more actively relative to its size, rather than sitting as a trading reserve.

What this means practically:

• USDT has deeper exchange liquidity and more trading pairs, so converting large amounts is easier
• USDT is what most retail customers hold, especially outside North America and Western Europe
• USDC is more prominent in regulated payments, institutional settlement and business-to-business flows
• USDC is growing faster, which matters if you are choosing for the next three years rather than this quarter

Network Availability and Transfer Costs

Both stablecoins exist on multiple blockchains, and the network matters far more to your customer’s experience than which token they hold.

Two points here overturn advice that was accurate a couple of years ago and is still widely repeated.

Ethereum is now cheap for stablecoin transfers. An ERC-20 transfer costs roughly six to fifteen cents, not the several dollars still quoted in most comparisons. Sustained low gas conditions have changed the calculus entirely.

Tron has become the most expensive major network for stablecoins. At around $2.17 per USDT transfer – roughly double that when sending to an address that has never held the token – TRC-20 now costs about thirty times more than ERC-20. It remains fast and predictable, and it is still the default for a large share of retail users, but the “Tron is the cheap one” assumption is out of date.

This has a direct bearing on the USDC vs USDT choice. USDT’s dominance is strongest on Tron – precisely the network that has become expensive. On Solana, BNB Chain and Ethereum, where costs are now negligible, both tokens are well supported and the practical difference narrows considerably.

Regulatory Position

Regulatory treatment of stablecoins tightened through 2025 and 2026, and the two tokens are positioned differently.

USDC was built for this environment. Circle’s disclosure cadence, reserve composition and corporate structure are aligned with what regulators have been asking for, and its listing on a major exchange has reinforced its position as the institutionally preferred option.

USDT operates with a different disclosure model and has faced more regulatory scrutiny, though its scale and the depth of its integration into global crypto markets have proved durable.

For a merchant, the practical question is narrower than the broader debate: does your jurisdiction, your bank or your payment partner have a preference? Some regulated counterparties will accept USDC and not USDT. Very few operate the other way around. If you expect to interface with traditional finance – a bank, an accountant, an institutional client – USDC tends to create less friction.

Which Should You Accept?

The decision depends on who your customers are, not on which token is theoretically superior.

Accept USDT if:

• Your customers are largely outside North America and Western Europe
• You sell to retail consumers who hold crypto on exchanges
• Deep liquidity for converting large amounts matters to you
• Your audience defaults to Tron, and you are prepared for its higher transfer cost

Accept USDC if:

• You sell business-to-business, especially to companies with finance teams
• You operate in a regulated sector or interface with traditional banking
• Reserve transparency is something you may need to explain to stakeholders
• Your customers are primarily in markets where USDC adoption is strong

Accept both if you want to remove the question from your customer’s path entirely – which is the case for most merchants.

Why Accepting Both Is Usually Right

The case for choosing one is weaker than it appears, because the cost of supporting both is close to zero.

Enabling a second stablecoin in a payment gateway is a settings change, not an integration project. Both settle to the same wallet infrastructure, both reconcile identically, and both are dollar-denominated, so your accounting treatment is the same. There is no conversion step and no additional fee layer.

The benefit is straightforward: the customer pays in whatever they already hold. Forcing a customer who holds USDT to acquire USDC – or the reverse – adds a swap, a fee and a reason to abandon the checkout.

A sensible default for most merchants: accept both USDT and USDC, across Solana, BNB Chain and Ethereum, and keep Tron available because a large share of customers still default to it. Present the cheapest network first at checkout, and let the customer choose the token.

Where you do need a policy is on what you hold. Accepting both and converting your balance into one preferred asset is a treasury decision, separate from the checkout decision – and it is where the reserve composition differences discussed above actually matter.

Bcon Global supports both USDT and USDC across Bitcoin, Ethereum, Solana, Tron and BNB Chain, with payments settling directly to the merchant’s own wallet – no intermediary balance, no KYC and a flat 1% fee. Because the model is non-custodial, the stablecoin you receive stays under your control from the moment it confirms. Details are in our guides on how to accept USDT payments and how to accept USDC payments.

What About Other Stablecoins?

USDC and USDT dominate, but they are not the only options, and merchants occasionally encounter others.

DAI is decentralised, backed by on-chain collateral rather than bank reserves. It holds its peg well and appeals to customers who prefer avoiding a corporate issuer entirely. Liquidity is far smaller than either USDC or USDT, and it is rarely what a retail customer holds.

Regional stablecoins pegged to the euro, pound and other currencies exist but have thin liquidity. Accepting them usually means converting immediately, which reintroduces a spread.

Exchange-issued stablecoins come and go with the platforms behind them. Concentration risk is the concern – the token’s value depends on the continued solvency of one company.

A practical rule: accept what your customers already hold. For almost every merchant that means USDT and USDC, and adding a third rarely produces a single additional sale.

The USDC vs USDT debate is usually framed as a safety question, but for a merchant it is mostly a distribution question. USDT reaches more retail customers globally; USDC creates less friction with banks, auditors and business clients.

Both hold their peg, both settle in seconds on modern networks, and supporting both costs almost nothing. Choose deliberately for what you hold on your balance sheet – and accept both at checkout so the customer never has to think about it.