Euro-denominated transfers within the SEPA (Single Euro Payments Area) zone are typically free or low-cost and settle same-day or next business day under EU regulation, using IBAN and BIC/SWIFT identifiers. Transfers outside SEPA or in non-euro currencies (e.g., USD, GBP transfers) go through the SWIFT network and traditional retail banks typically charge higher fixed fees (often €10-30) plus a currency-conversion margin above the mid-market rate, and can take 1-4 business days. Fintech transfer specialists (e.g., Wise, Revolut) are commonly used as lower-cost alternatives to traditional bank international transfers, offering closer-to-mid-market exchange rates and transparent fee disclosure. Banco de España, as the national banking regulator, requires banks to disclose all transfer fees and exchange-rate margins upfront under Spanish and EU consumer-protection rules.