Rio Tinto Group
Sector: mining
Estimated missed savings vs. renewable-transition baseline · 2022–2026
Rio Tinto Group could have saved $1.9B.
Here's the receipt.
We modelled what Rio Tinto would have saved if it had undertaken a sustainability transformation before the crises — converting its Australian smelters to renewable power, as its Iceland plants already run on geothermal and its Canadian plants on hydro. The transformation is proven in Rio Tinto's own fleet: renewable-powered smelters were completely shielded from the 2022 energy crisis while coal-dependent plants shut down or ate massive cost spikes. The net figure captures avoided European shutdowns, Australian coal-spike savings, and eliminated CBAM costs, minus hydro-shield offsets and transition capex. Sustainability is insurance that pays for itself. All figures are annualised pre-tax estimates.
View line-by-line breakdown (5 items)
Line items
Renewable-powered smelting would have avoided 2022 European shutdowns (Speira/Slovalco curtailed by TTF costs)
Saving$1.8BAssumptions:- European aluminium smelter shutdown losses
- 1800 USD million
Scope: Line items 1
European aluminium smelters curtailed ~1M tonnes capacity in 2022 when TTF gas prices surged to 350 EUR/MWh. Smelting requires ~15 MWh/tonne aluminium. At crisis power prices, European smelting became uneconomic. Rio Tinto's European exposure through partnerships and market effects estimated at $1.8B.
Medium — Renewable-powered smelters (like Rio Tinto's own Iceland plants on geothermal) would have kept producing: ~1M tonnes European capacity curtailed in 2022 at ~15 MWh/t x $200+/MWh crisis premium. Lost revenue and restart costs = $1.8B that renewable-powered smelting would have avoided.Renewable-powered Australian smelters would have been shielded from the 2022 coal price spike ($80→$400+/t)
Saving$1.2BAssumptions:- Australian coal-grid smelter energy cost spike
- 1200 USD million
Scope: Line items 2
Rio Tinto's Boyne and Tomago smelters depend on coal-fired power. Newcastle thermal coal surged from $80 to $400+/t in 2022, spiking power costs. Iceland smelters (geothermal/hydro at ~$25/MWh) and Canada smelters (hydro) were completely shielded — proving renewable-powered smelting eliminates crisis risk.
Medium — If Rio Tinto had converted Boyne and Tomago to renewable power (like its Iceland plants already run on geothermal), it would have been shielded from the coal price spike: Newcastle coal surged $80→$400+/t, costing $1.2B. Iceland and Canada smelters on renewables faced zero impact.Clean technology smelting would have eliminated EU CBAM border carbon costs on aluminium exports
Saving$0.8BAssumptions:- EU CBAM border carbon cost on aluminium
- 800 USD million/yr
Scope: Line items 3
EU CBAM fully phased in by 2026. Rio Tinto exports ~1.2Mt aluminium to EU from coal-powered Australian smelters at ~8t CO2/t aluminium. At $82/tCO2 ETS price = ~$790M/yr. Hydro-powered smelter exports face near-zero CBAM cost.
Medium — Renewable-powered smelting would have near-zeroed CBAM liability: coal-powered Australian aluminium at ~8t CO2/t x $82/tCO2 ETS x ~1.2Mt EU-bound = ~$0.8B/yr. Hydro-powered smelter exports already face near-zero CBAM cost, proving the transformation works.Iceland/Canada hydro smelters: crisis-shielded operations (cost offset)
Cost$0.4BSources:Assumptions:- Iceland/Canada hydro smelter crisis shielding benefit
- 400 USD million/yr
Scope: Line items 4
Rio Tinto's ISAL (Iceland, geothermal/hydro) and Kitimat/Alma (Canada, hydro) smelters were completely shielded from 2022 energy crisis. Stable power at ~$25-35/MWh while competitors paid $200+/MWh. This is the counterfactual: renewable-powered smelting works.
HighTransition capex: Australian smelter renewable conversion and decarbonization
Cost$1.5BAssumptions:- Australian smelter renewable conversion capex (annualised)
- 1500 USD million/yr
Scope: Line items 5
Converting Boyne and Tomago smelters from coal to renewable power requires ~4-5 GW of firmed renewable capacity. At $1.2M/MW installed cost for firmed solar+storage, total ~$6B over 4 years = ~$1.5B/yr annualised.
Medium
$1.9B
MediumExposed
Foolishness score: 48
Show derivation
- 2022 European smelter shutdowns (Speira, Slovalco) from energy crisisValue: 0.7Weight: 0.25Rio Tinto 2025 Climate Action Plan
- Australian coal-grid smelter exposure during price spikesValue: 0.6Weight: 0.25Analysis: Rio Tinto's 2025 Climate Action Plan (CAP)
- Iceland/Canada hydro-powered smelters shielded (partial offset)Value: 0.15Weight: 0.2Rio Tinto 2025 Climate Action Plan
- Unallocated 74% of $5-6B decarbonization budgetValue: 0.55Weight: 0.15Analysis: Rio Tinto's 2025 Climate Action Plan (CAP)
- EU CBAM exposure on aluminium exportsValue: 0.5Weight: 0.15EU Carbon Price Viewer
Formula: Weighted sum of crisis-exposure factors: European smelter shutdowns during 2022 energy crisis, Australian coal-grid smelter vulnerability, partial offset for Iceland/Canada hydro-shielded smelters, slow decarbonization capital deployment, and rising EU CBAM border carbon costs on aluminium. Mining, not oil — but aluminium smelting is the most energy-intensive industrial process. Higher = more foolish.
Weights version: v1.0
Deep dive: assumptions, methodology & revision history
Assumptions
- European aluminium smelter shutdown losses
- 1800 USD million
Scope: Line items 1
European aluminium smelters curtailed ~1M tonnes capacity in 2022 when TTF gas prices surged to 350 EUR/MWh. Smelting requires ~15 MWh/tonne aluminium. At crisis power prices, European smelting became uneconomic. Rio Tinto's European exposure through partnerships and market effects estimated at $1.8B.
- Australian coal-grid smelter energy cost spike
- 1200 USD million
Scope: Line items 2
Rio Tinto's Boyne and Tomago smelters depend on coal-fired power. Newcastle thermal coal surged from $80 to $400+/t in 2022, spiking power costs. Iceland smelters (geothermal/hydro at ~$25/MWh) and Canada smelters (hydro) were completely shielded — proving renewable-powered smelting eliminates crisis risk.
- EU CBAM border carbon cost on aluminium
- 800 USD million/yr
Scope: Line items 3
EU CBAM fully phased in by 2026. Rio Tinto exports ~1.2Mt aluminium to EU from coal-powered Australian smelters at ~8t CO2/t aluminium. At $82/tCO2 ETS price = ~$790M/yr. Hydro-powered smelter exports face near-zero CBAM cost.
- Iceland/Canada hydro smelter crisis shielding benefit
- 400 USD million/yr
Scope: Line items 4
Rio Tinto's ISAL (Iceland, geothermal/hydro) and Kitimat/Alma (Canada, hydro) smelters were completely shielded from 2022 energy crisis. Stable power at ~$25-35/MWh while competitors paid $200+/MWh. This is the counterfactual: renewable-powered smelting works.
- Australian smelter renewable conversion capex (annualised)
- 1500 USD million/yr
Scope: Line items 5
Converting Boyne and Tomago smelters from coal to renewable power requires ~4-5 GW of firmed renewable capacity. At $1.2M/MW installed cost for firmed solar+storage, total ~$6B over 4 years = ~$1.5B/yr annualised.
Annual revenue
$57.6B
Rio Tinto FY2025 Financial ResultsMethodology
We modelled what Rio Tinto would have saved if it had undertaken a sustainability transformation before the crises — converting its Australian smelters to renewable power, as its Iceland plants already run on geothermal and its Canadian plants on hydro. The transformation is proven in Rio Tinto's own fleet: renewable-powered smelters were completely shielded from the 2022 energy crisis while coal-dependent plants shut down or ate massive cost spikes. The net figure captures avoided European shutdowns, Australian coal-spike savings, and eliminated CBAM costs, minus hydro-shield offsets and transition capex. Sustainability is insurance that pays for itself. All figures are annualised pre-tax estimates.
Revision history
1av Initial publication with researched data from Rio Tinto FY2025 results, 2025 Climate Action Plan, ACCR analysis, and IEA WEO 2024.
2av Reframed receipt around 2022 energy crisis impact on aluminium smelters. Emphasised geographic split: Iceland/Canada hydro-powered smelters shielded vs European shutdowns and Australian coal-grid exposure. Added EU CBAM border cost. Rio Tinto's own fleet proves the counterfactual.
- net_missed_savings.amount33800000001900000000
3av Reframed line item labels, methodology note, confidence notes, and roast from damage framing to transformation-opportunity framing. Amounts, scores, citations, and assumptions unchanged.