The Bank of Spain Resolution publishes the official euro exchange rates for 18 March 2026, in accordance with the ECB, and establishes that these rates shall take official effect pursuant to Law 46/1998 (Art. 36). This change affects all parties conducting foreign currency financial transactions, as official rates are used for calculating amounts, interest rates, and conversions. The published rates are final and must be applied from the day following their publication in the BOE.
Traders, companies, and individuals conducting foreign currency transactions must update their calculations for prices, taxes, and payments based on the new official rates. Financial institutions must review their internal systems to ensure conversion accuracy. Financial advisors and accountants must inform their clients of the change and adjust their financial statements. Errors in applying these rates may lead to discrepancies in taxes or payments, carrying a risk of administrative sanctions.
The administrative team reviews your specific situation.