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BOE-A-2026-5703 ·11 March 2026 ·Act critical
Administrative

Businesses and individuals: 3 months to update official exchange rates or risk discrepancies

The Bank of Spain Resolution publishes the euro exchange rates for 10 March 2026, approved by the ECB, which now have official effect (Art. 36 of Law 46/1998). These rates supersede previous ones and must be used for financial transactions, contracts, and tax returns. This change affects all users of foreign currencies in Spain.

In 2 key points

  1. Official exchange rates are updated whenever the ECB publishes new rates (Art. 36 of Law 46/1998) (art. 36 Ley 46/1998)
  2. 1 euro = 1.1641 US dollars (official rate from 10 March 2026) (CAMBIOS)

How it affects those involved

Businesses, individuals, and public administrations must update their financial calculations and contracts with the new official rates from 10 March 2026. Financial advisors and accountants must review their reports and tax filings. Traders operating in foreign currencies may see changes in profits or costs. Using outdated rates may lead to penalties or tax discrepancies.

Lifecycle

2026-03-11PublishedPublished in the BOE
2026-03-10Into 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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