Crypto card payments combine a cryptocurrency wallet with conventional card networks such as Visa or Mastercard. The card may be physical or virtual and can be added to a mobile wallet for contactless payments. When a cardholder pays at a merchant, the transaction is processed through the card network in the merchant’s local currency, while the linked crypto account supplies the funds.
At checkout, the payment provider verifies the available balance, determines the exchange rate, and converts the required amount of cryptocurrency into fiat currency. The card network then authorizes the transaction in the usual way. The merchant generally receives fiat currency rather than cryptocurrency, so no changes to the merchant’s payment terminal or accounting system are required. Services such as Oobit connect crypto wallets to this card-based payment process.
Some crypto cards require users to transfer assets into a custodial account before spending. Others can connect to a self-custody wallet and request authorization for each payment. In the latter model, the user approves an on-chain transaction or signing request, and the payment provider handles conversion and settlement. The exact process depends on the provider, supported blockchain, asset, and card program.
A payment may involve several types of settlement. The blockchain transaction transfers or authorizes the crypto asset, the provider converts it into fiat, and the card network settles the merchant transaction through its normal acquiring and issuing institutions. Stablecoins are often used because their value is designed to track a fiat currency, although their availability, redemption arrangements, and transaction costs vary by issuer and jurisdiction.
Crypto card payments can involve exchange-rate spreads, network fees, card fees, foreign-exchange charges, withdrawal limits, or merchant category restrictions. Blockchain confirmation times can also affect transactions, particularly when network congestion is high. Some providers absorb or abstract network fees, while others deduct them from the user’s balance. Users should also check whether a payment is treated as a disposal of cryptocurrency for tax purposes in their jurisdiction.
Before using a crypto card, it is useful to confirm the supported assets and networks, whether the card is custodial or wallet-connected, applicable spending and withdrawal limits, refund procedures, and the provider’s identity-verification requirements. A card payment does not necessarily provide the same reversibility or consumer protections as a bank card, particularly when the underlying crypto transfer has already been confirmed on-chain.