Carbon Tax Phase 2: The Only Cost on Site With a Five‑Year Growth Plan

Most costs on a mine have the decency to be unpredictable. Carbon tax is different: it has published its five-year growth plan, and it intends to hit every target.

Phase 2 of South Africa’s carbon tax started on 1 January 2026. The rate rose from R236 to R308 per tonne of CO₂e, and the Carbon Tax Act sets it to climb every year until it reaches R462 in 2030. For most mines, carbon has quietly moved from “compliance line item” to “real operating cost”.

The rate path: refreshingly honest

Section 5 of the Carbon Tax Act sets the rate for each year of Phase 2:

That is a 50% increase in five years, before your own emissions change at all. And the carbon fuel levy collected at the pump rose from 1 April 2026 to 23 cents a litre for diesel and 19 cents a litre for petrol. If you run a large haul fleet, your trucks have been paying it every time they stop for a drink.

Why the real number is hiding

The tax calculation is rarely the hard part. The hard part is that the inputs live in different places: fuel issues in the fuel management system, electricity on utility accounts, explosives and process data in plant systems, production tonnages in yet another report. The annual GHG inventory gathers them once a year, usually long after the decisions that caused the emissions have been made and forgotten.

So the simple questions stay unanswered: Which site has the highest carbon cost per tonne? Which fleet burns the most diesel per tonne moved? What happens to 2028 if production grows by 5%? Nobody knows, but everyone has a theory.

What to put in place now

• A monthly emissions view, built from the fuel, energy and production data you already collect, instead of an annual spreadsheet marathon.
• Carbon cost per tonne by site and process, sitting next to every other unit cost where it belongs.
• A forward view to 2030 using the legislated rates, so budgets stop being surprised by something that was announced years ago.
• What-if scenarios for fuel switching, solar, efficiency projects and offsets, so every option is compared on the same basis.

Your allowances matter too. Phase 2 changes several of them, so confirm your own position with your tax adviser before relying on any estimate.

Start with a rough number

Our free carbon tax estimator uses the legislated rates and your own emissions, allowances and fuel volumes to show the cost each year to 2030. It is a planning estimate, not tax advice, but it is usually enough to earn carbon a seat at the monthly management meeting. Possibly a better seat than it would like.

Want to see where this applies in your operation? Our 30-day Data Opportunity Assessment includes emissions and energy data where it matters to your operation. Or request a call with our team.