Shift4 Payments just made it easier for hundreds of thousands of US merchants to accept the world’s largest stablecoin. The company announced a partnership with Lydian to integrate Tether’s USDT into its Pay with Crypto solution, letting customers pay directly from major crypto wallets while merchants receive good old-fashioned fiat currency.
The integration means merchants don’t need new hardware, don’t need to understand blockchain mechanics, and don’t need to hold any crypto on their balance sheets. Payments get automatically converted to local currency at the point of transaction.
From Bitcoin to stablecoins: the evolution of Pay with Crypto
Shift4, which trades on the NYSE under the ticker FOUR, first launched its Pay with Crypto product in October 2024. That initial version supported Bitcoin and Ethereum, among other tokens.
Stablecoins solve volatility problems by design. USDT is pegged to the US dollar, so the conversion from crypto wallet to merchant bank account is far less dramatic than with Bitcoin or Ethereum.
This isn’t Shift4’s first stablecoin rodeo, either. In December 2025, the company launched a global stablecoin settlement platform that allowed merchants to accept a variety of stablecoins including USDC, USDT, DAI, PYUSD, and EURC. The latest Lydian partnership specifically enhances the consumer-facing Pay with Crypto experience, bringing USDT acceptance to the point-of-sale level across thousands of US merchants.
One notable caveat: the service is available across the United States excluding New York, which has its own regulatory framework for crypto-related financial services.
What this means for investors and the broader market
Shift4 CEO Taylor Lauber framed the USDT addition as enhancing the company’s crypto offerings without introducing additional complexity or risk for merchants.
The traditional payments industry has been cautiously circling crypto for years. Companies like PayPal launched their own stablecoin (PYUSD), while Visa and Mastercard have explored various blockchain settlement experiments. Shift4’s approach targets the merchant side of the equation directly, embedding crypto acceptance into existing payment flows rather than creating separate crypto products.
The automatic fiat conversion model does raise an interesting question for stablecoin demand dynamics. If merchants immediately convert USDT to dollars, the stablecoins are essentially passing through rather than being held. But the transaction volume itself still requires USDT liquidity, and increased payment use cases could drive broader circulation.
Regulatory uncertainty around stablecoins in the US hasn’t fully resolved, and Shift4’s exclusion of New York merchants hints at the patchwork compliance landscape that still exists. Any federal stablecoin legislation could either accelerate or complicate the kind of integrations Shift4 is building, depending on what requirements emerge.