Chile opposition to take megareform tax plan to Constitutional Court

Chile's opposition parties — including the Socialist Party (PS), the Party for Democracy (PPD), the Communist Party, the Broad Front, the Liberal Party and others — have agreed to bring a constitutional challenge against President José Antonio Kast's megareform tax proposal. The challenge will focus on the "invariability" clause that would lock corporate tax rates for up to 25 years, as well as related environmental indemnity provisions.

Internal disputes have surfaced within the opposition. A regional PPD committee in Coquimbo publicly rejected any agreement with the government, vowing to go to the Constitutional Court. Socialist Party leader Paulina Vodanovic denied any deal with the executive and defended her party's outright rejection of the reform, citing concerns over reduced funding for health, education and housing. Tensions between Vodanovic and fellow socialist senator Daniella Cicardini have eased, with both now urging unity to confront the legislation in the court.

The opposition's coordinated move follows a narrow Senate approval of the megareform and signals an attempt to halt the tax changes through judicial review, while highlighting a shift away from the historic consensus‑building politics of Chile's transition era.