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BOE-A-2026-6538 ·20 March 2026 ·Act critical
Administrative

Businesses and individuals: 1 month to update official exchange rates in financial records

The Bank of Spain publishes official exchange rates for the euro as of March 19, 2026, in accordance with Article 36 of Law 46/1998. These rates replace previous ones and must be incorporated into financial records and international transactions. The change affects all users conducting foreign exchange operations, especially in current accounts, international payments, or invoicing. The rates are fixed and cannot be modified by the Bank of Spain prior to official publication.

In 2 key points

  1. Official exchange rates will be published on 19 March 2026 and must be applied immediately to financial records (art. 36 Ley 46/1998)
  2. The change affects all foreign currency transactions, including international invoicing and payments (art. 36 Ley 46/1998)

How it affects those involved

For companies and individuals conducting international transactions, it is mandatory to update financial records with the new exchange rates to prevent errors in payments, invoicing, or profit calculations. Public administrations and financial institutions must verify their internal systems to ensure calculation accuracy. Advisors and accountants must review their billing and auditing procedures to ensure the correct application of the new rates. Errors in application may result in fines or audit disputes.

Lifecycle

2026-03-20PublishedPublished in the BOE
2026-03-20Into forceComes into force (art. 36 Ley 46/1998)
Official text Based on BOE data (boe.es). Information, not advice.

Does this provision affect you?

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This analysis is informational only and does not constitute legal advice or create a client-adviser relationship. BM Consulting.
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