What Is USDT (Tether)? The Merchant's View of Tether

USDT is the dollar stablecoin most people meet first. Issued by Tether Holdings Limited, it is the largest US-dollar stablecoin by market value — roughly $186 billion in circulation as of mid-2026 , redeemable 1-for-1 against reserves held primarily in US Treasury bills and cash, with smaller bitcoin and gold allocations. It is the most widely held dollar instrument on public blockchains. This guide is the merchant's-eye view of what USDT is — how it holds its peg, what backs it, where it is restricted, and the risks worth knowing before it touches your balance sheet.

What is USDT, exactly?

USDT is a token contract deployed on a public blockchain that tracks the US dollar one-to-one. When Tether mints a new USDT, an equivalent amount of dollar-denominated assets is added to its reserves. When a holder redeems USDT for dollars through a verified Tether account, the token is burned and reserves are reduced. The peg is not algorithmic. There is no rebalancing function, no over-collateralization formula, no on-chain monetary policy. It is a claim on a balance sheet, tokenized and routed across blockchains.

This makes USDT functionally different from algorithmic stablecoins like the now-defunct Terra UST, and structurally different from crypto-collateralized stablecoins like DAI. USDT lives or dies on Tether Holdings' ability to honor redemptions — and Tether, live since 2014, has honored every documented redemption request through the market crises that followed, from the 2018 banking-relationship freeze to the 2022 Terra collapse.

What backs USDT?

Tether publishes quarterly attestations from BDO Italia, an Italian arm of the BDO global network. As of the Q4 2024 attestation, the reserve composition was:

• ~82% US Treasury bills and cash equivalents — the bulk of the float
• ~4% bitcoin — held as a strategic reserve, exposed to price swings
• ~3% gold and precious metals — physical and tokenized
• ~6% secured loans — collateralized lending to vetted counterparties
• ~5% other investments — including equity stakes in fintech, AI, and mining

That Treasury-heavy mix is why a 2023 US banking shock landed on a competitor instead of Tether: USDC slipped below the dollar after $3.3 billion of Circle's reserves were briefly trapped at the failed Silicon Valley Bank, while Tether — with no SVB relationship — held the line. The methodology draws fair criticism — quarterly is slower than USDC's monthly cadence, and a BDO attestation is not a full Big Four audit — but the peg has held across every crisis on record.

How does USDT move across blockchains?

Each blockchain runs its own USDT contract, and the tokens are not natively interchangeable. USDT-TRC20 (Tron) and USDT-ERC20 (Ethereum) live in separate balance ledgers that only connect through bridges, swaps, or Tether's own treasury operations. The same dollar peg, the same issuer — but a different on-chain asset on every network.

The payer must send the contract shown for the selected route. A matching ticker on another network is not the same asset for that invoice, and an address that looks familiar does not make the networks compatible. Wallet and checkout must agree on both asset and network before the transfer is signed.

Paymos accepts USDT on 11 supported networks. Payments received in USDT across those networks contribute to the merchant's USDT balance, while the merchant later chooses an available payout network. The payer's wallet covers the variable network fee; Paymos does not publish one permanent gas amount. The USDT acceptance page lists the available routes.

When does USDT settle?

USDT settlement depends on the selected network, payment amount, and current blockchain conditions. Seeing a transfer in a fresh block is not the same as receiving the confirmed result used for fulfilment. Different networks reach stronger settlement states through different mechanisms, so one permanent confirmation count cannot describe every USDT route.

Paymos applies a confirmation policy appropriate to the route and amount. The merchant should therefore use the confirmed payment event rather than promise a fixed number of seconds or count blocks independently. Current network conditions can change the wait even when the asset and invoice amount are unchanged. This keeps order fulfilment tied to the payment result instead of a historical timing estimate.

What regulatory exposure does USDT carry?

USDT's regulatory treatment differs by market. The United States enacted the GENIUS Act in July 2025, establishing a federal framework for payment stablecoins and requirements around reserves, disclosure, and supervision. Tether is not a US issuer, so the framework does not place it in the same category as a domestically authorized issuer.

In the European Union, MiCA's stablecoin provisions require an authorized issuer for an e-money token offered under that regime. Regulated venues consequently restricted or removed USDT for EEA users. Canada applies its own value-referenced-crypto-asset framework, under which registered platforms do not generally offer USDT.

For a merchant, the practical point is not to treat worldwide USDT availability as permanent. Check the rules that apply to the business, the payer, and the venue used for conversion or custody. Offering another supported settlement asset can preserve customer choice where USDT access is restricted.

How does USDT compare to USDC?

USDC, issued by New York-based Circle Internet Group, is the second-largest dollar stablecoin at roughly $75 billion supply . It publishes monthly reserve attestations from Deloitte, operates under US state money-transmitter licenses, and holds its reserve almost entirely in short-dated Treasuries and cash at US banks. The trade-off for a merchant is a mirror image: USDC carries the regulatory clarity USDT lacks, and USDT carries the crisis record USDC dented in 2023 — its one headline depeg, the SVB freeze, is the same event that left Tether untouched. Each token's strength is the other's weakness.

USDT and USDC are not mutually exclusive — most merchants who accept stablecoins accept both. USDT carries the larger emerging-markets distribution. USDC carries the regulatory clarity. The chain support overlaps almost completely; on most networks, USDT and USDC contracts sit side by side and pay similar gas fees. A processor that supports one without the other is leaving customer demand uncaptured.

What does it cost to move USDT?

A USDT payment can involve separate network, processing, and conversion costs. The payer's wallet pays the variable network fee needed to send the transfer. Its amount depends on the selected network and current blockchain conditions, so a permanent dollar estimate belongs neither in checkout copy nor in a merchant cost model.

With Paymos, Standard processing is 1.0% per settled invoice and Enterprise pricing is 0.3% on request. There is no setup fee, monthly platform fee, monthly minimum, or reserve. Paymos covers the network cost of accepting and consolidating the payment, and it does not force an internal conversion or add a hidden conversion spread.

The merchant settles in USDT. If the business later uses an external service to convert that balance to fiat, the service's spread and withdrawal terms are a separate cost outside Paymos. Compare the complete route rather than one headline percentage.

What are the realistic risks?

USDT's risks fall into three buckets, in descending order of practical likelihood:

1. Regulatory delisting in a specific market — already happened in Canada and the UK, and may extend further. Merchants serving regulated markets need USDC or a regulated EUR equivalent.
2. Reserve composition stress — USDT's bitcoin and gold allocations, combined around 7%, carry price volatility. A simultaneous crash in bitcoin and gold could pressure the peg if redemption volume spiked, though the ~82% held in Treasuries and cash absorbs that shock.
3. Operational risk at Tether Holdings — concentrated issuance from a single private company carries governance risk. Tether is not regulated by a banking authority and does not publish full audited financial statements.

The risk that USDT becomes worthless overnight is low. The risk that it becomes unusable in specific jurisdictions, or that reserve composition triggers a brief depeg, is non-trivial. Diversifying across USDT and USDC is the standard merchant response.

Why do merchants accept USDT?

Merchants accept USDT because customers already hold it on multiple networks and can pay without entering card details. A finalized blockchain payment cannot be reversed through a card-scheme chargeback. A refund remains possible, but it is a new outbound transaction initiated by the merchant rather than a reversal of the original transfer.

The settlement asset also stays visible. Paymos accepts USDT on 11 networks, combines payments in the same asset into one merchant balance, and does not force conversion to fiat, BTC, or ETH. The merchant can later choose an available USDT payout network and withdraw to a whitelisted, merchant-controlled address.

Those benefits do not make every route equal. Network fees vary, confirmation requirements depend on network and amount, and regulatory access differs by market. A practical acceptance setup offers the supported routes customers use, shows a live payment state, and keeps another supported asset available where USDT is restricted.