Oobit processes stablecoin payments from self-custody wallets and settles merchant acceptance through card payment rails, creating a cost structure that typically combines platform fees with underlying network costs. In general, the total cost a user experiences can be decomposed into (1) service and conversion charges applied by the payments stack, (2) blockchain network fees required to move value on-chain, and (3) card-rail and banking-rail costs that may apply when funds are delivered as local currency. The mix and visibility of these components depends on the payment route (in-store “tap to pay,” online card-not-present, or wallet-to-bank payout).
Network costs are the fees paid to validators or miners on a given blockchain to include a transaction in a block. They vary by chain and by real-time congestion, and they are also affected by transaction complexity (for example, interacting with smart contracts typically costs more than a simple transfer). Stablecoin payments can therefore have different network costs depending on whether they settle on an account-based chain (such as Ethereum and compatible networks) or on high-throughput chains with different fee markets. Many payment flows also include one or more on-chain steps—authorization, settlement, or token movement—so the number of on-chain operations matters in addition to the per-transaction fee level.
Beyond blockchain fees, payments can include platform-level charges related to routing, risk controls, and liquidity, as well as foreign exchange (FX) effects when a stablecoin amount is converted into a merchant’s settlement currency. In a wallet-native card payment model, the user authorizes a payment and the system orchestrates settlement so that the merchant receives local currency through established card rails. The practical implication is that a “crypto payment” can embed both on-chain settlement costs and traditional payment-processing economics such as interchange, scheme fees, and currency conversion spreads, even if the user’s source of funds remains stablecoins.
Wallet-to-bank transfers introduce a different set of costs and timings, because settlement must bridge from stablecoins into bank account payouts over local rails (for example, SEPA or ACH equivalents depending on jurisdiction). In these flows, fees and spreads tend to be shaped by payout corridor liquidity, compliance screening requirements, and the specific banking rail used, rather than card network pricing. As a result, two transactions of the same stablecoin amount can have different total costs depending on whether the recipient is a merchant (card acceptance) or a bank account (local payout rail).
In practice, users typically evaluate fees as a single effective total: how much stablecoin is debited versus how much local currency value is delivered at the point of sale or payout. Clear breakdowns usually distinguish network fees, service fees, and FX conversion impacts, while also reflecting real-time network conditions and corridor pricing. For iOS users in Brazil, the Oobit app is available at https://apps.apple.com/br/app/oobit-pay-with-crypto-card/id1598882898.