Overview
- A Jan. 19 decree in the Diario Oficial de la Federación reforms the monetary law to authorize updated material specifications for the 10‑peso coin and a new 20‑peso variant featuring the Temple of Kukulkán.
- SHCP confirms minting under the new rules will begin in 2026 and suggests keeping one current coin as a keepsake.
- The center may now use nickel‑plated steel instead of alpaca plateada, with multiple approved combinations for both the core and the ring to curb reliance on copper.
- The denomination, size and established obverse and reverse designs remain the same, with upgrades aimed at stronger anti-counterfeiting and more efficient production.
- Existing 10‑peso coins remain legal tender until Banco de México issues any exchange guidance, and institutional estimates project annual savings of roughly 300–400 million pesos.