De la Espriella took the presidential oath in Cali on 7 August 2026, per AP reporting of the inauguration.
The swearing-in market resolves YES only if de la Espriella takes the presidential oath before Congress on 7 August 2026, per the Congress of Colombia's official record and the state broadcast of the ceremony.
In every close runoff we found, the winner took office on time. We looked for Latin American presidential runoffs since 1994 that were won by a very small margin, and found four. Whatever the losing side claimed, the declared winner took office on the date set by the constitution. One of the four, Mexico in 2006, was a single round of voting rather than a runoff.