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The bill is the legislative vehicle for the Kast administration's economic reset, structured around five pillars: (i) post-fire reconstruction, (ii) construction-sector revival, (iii) tax competitiveness, (iv) legal certainty for long-term investment, and (v) public-spending containment. The mining-relevant elements are concentrated in pillars (iii) and (iv).
Corporate tax cut (Primera Categoría). Phased reduction from 27% today to 25.5% in 2027, 24% in 2028, and 23% from 2029 onwards. Pairs with a ~USD 1.4 bn annual employment credit for ~235,000 SMEs.
25-year tax-invariability regime. For "major projects" — operationally this captures the bulk of the world-class copper and lithium pipeline — the bill freezes the applicable tax/royalty regime for 25 years from project commitment. This shields investors from future increases in the mining royalty (Royalty Minero, in force since January 2024) and from new sector-specific levies. Capital-repatriation incentives accompany the regime. The structure mirrors Argentina's RIGI (filed in this register 2024-07-08) and Peru's stability agreements.
Permitting reform. Caps the number of environmental review rounds, caps injunctive relief during permitting, and sets statutory deadlines for archaeological clearances. The explicit target is to compress the >1,000-day permitting timelines that have stalled named projects across the copper, lithium and iron-ore portfolios.
Status. The bill is formally before the Chamber of Deputies; the Kast government does not hold a single-party majority, so passage will depend on coalition arithmetic. The 40-measure package was first announced on 15 April 2026 and filed as a single omnibus bill on 22 April.
producer (>25% of global refined-equivalent supply) and #2 lithium producer. Tax-invariability + permitting reform directly affects global supply-chain investment decisions for cathode-grade lithium carbonate, copper concentrate, and copper cathode — flowing through to EV battery costs and copper-intensive electrification capex.
Lithium Strategy (filed 2023-04-20) and the December 2025 Codelco/SQM NovaAndino JV (filed 2025-12-27) consolidated state involvement in lithium. The new bill does not repeal those arrangements but creates a parallel investor-friendly regime around them — practically signalling that Chile is moving from state-capture toward investment-capture as the primary mechanism for resource-rent extraction.
(RIGI 2024) and Peru (stability agreements) in offering long-horizon tax certainty to lock in critical-minerals capex. This raises the competitive bar for Indonesia's hilirisasi (which combines export bans with smelter incentives) and for African jurisdictions (Zambia, DRC, Zimbabwe) that have so far emphasised export controls and processing mandates over tax invariability.
8.18% cumulative GDP uplift over 10 years contingent on full passage. Even partial passage materially affects the ~USD 100 bn stalled mining pipeline and the BCCh's medium-term growth forecasts. ETF transmission via lithium / copper / Chile-equity vehicles.
negotiation intact, or be diluted to a shorter horizon (10–15 years is the historical Chilean range, e.g. DL 600).
Constitutional Court review — earlier permitting-reform efforts have been struck down on environmental-rights grounds.
under the Boric government): the bill freezes the rate prospectively for new projects but does not appear to cut the headline royalty for existing operators.
late December 2025 under the prior administration — falls inside or outside the new invariability regime.