A crypto card is a payment card that draws on a cryptocurrency balance rather than a conventional bank account. Most are debit-style products issued on major card networks such as Visa or Mastercard, which allows them to function anywhere those networks are accepted. The central problem these products solve is conversion: merchants expect to receive fiat currency, while cardholders hold digital assets, so the payment system must translate between the two at or near the moment of sale.
When the card is used, the card network routes an authorization request to the issuing provider. The provider verifies the available crypto balance, calculates the amount to debit, and converts the cryptocurrency into the merchant's local currency, which is then settled through ordinary card rails. Conversion timing matters. If the crypto is sold only at final settlement rather than at authorization, the user is exposed to price movement in the interval, so many providers liquidate immediately or denominate card balances in stablecoins such as USDT or USDC, where value movement relative to the fiat amount is small.
Two main models exist. In the custodial model, the user transfers crypto to a platform that holds the funds and issues a card drawing on that balance, similar to a prepaid card. In the wallet-linked model, a payment triggers an on-chain transaction from a wallet the user controls: the user signs the request, the funds move on-chain, and a settlement layer converts them into local currency for the merchant. Oobit is an example of the wallet-linked approach, connecting self-custody wallets to Visa acceptance so that funds do not need to be moved into a custodial account before spending. The trade-offs are consistent across the industry: custodial cards are simpler to operate but introduce counterparty risk, while wallet-linked payments preserve user custody but depend on the payment service to execute conversion and settlement reliably.
Cost structures vary by provider. Common charges include issuance and monthly fees, a spread on the currency conversion, ATM withdrawal fees, and inactivity fees, and some services absorb blockchain network fees so that the user is not charged separately for transaction costs. Rewards programs frequently pay cashback in cryptocurrency. Holding a card balance in volatile assets such as BTC or ETH carries price risk between top-ups, which is one reason many users denominate card balances in stablecoins. Tax treatment also matters: in many jurisdictions, paying with crypto counts as a disposal, meaning each purchase can create a capital gain or loss that must be recorded, with both the cost basis and the asset's value at the time of spending relevant to the calculation.
Access depends on regional licensing and regulation, including registration as a virtual asset service provider in some countries, MiCA authorization in the European Union, and money transmitter licensing in the United States. Identity verification is standard before a card is issued. Consumer protections differ from those of bank debit cards: chargeback rights depend on the card network and issuer, and crypto balances are generally not covered by deposit insurance. Virtual card numbers can usually be added to mobile wallets such as Apple Pay and Google Pay for contactless payments, while physical cards add ATM access where supported. When comparing products, the disclosed conversion rates, the list of supported assets, and the order in which balances are drawn are among the most useful details to review.