South Africa's carbon tax entered Phase 2 on 1 January 2026, and for many companies the change is the first time carbon cost becomes a line item the finance team cannot ignore. The headline rate steps up sharply, the generous Phase 1 allowances begin to tighten, and eligible offsets become a more valuable tool.
The Phase 2 Legislative Reality
Phase 2 runs from 2026 to 2030. The Carbon Tax Act sets the headline rate at R308 per tonne of CO2e for 2026, up from R236 in 2025, rising to R462 per tonne for 2030. Intermediate years follow the same escalation path, shown here as a planning forecast:
| Year | Headline rate per tCO2e |
|---|---|
| 2026 | R308 |
| 2027 | R347 |
| 2028 | R385 |
| 2029 | R424 |
| 2030 | R462 |
The 2026 and 2030 figures are set in the legislation; treat the years in between as an escalation path to confirm against the current Act and Treasury publications.
Allowances, Offsets and Corporate Liability
The headline rate overstates what most companies actually pay, because allowances reduce the taxable emissions. In Phase 1 the basic tax-free allowance alone was 60%, with further allowances for trade exposure, performance, carbon budgets and offsets. From 2026 the basic allowance begins stepping down, while the carbon offset allowance has been widened: up to 15% of emissions for fuel combustion and up to 10% for process and fugitive emissions. Published analysis illustrates how a maximum-allowance position can bring the effective 2026 rate on combustion emissions to only a fraction of the headline, but that depends on each company's own allowance position.
The consequence is that unmitigated emissions are where the exposure sits. Emissions above the allowances are taxed at the full rate, and under-declaration risks assessments, interest and penalties from SARS. As allowances shrink and rates climb, the value of using the offset allowance fully rises with them.
How Offsets Work in Practice
- Eligible standards: credits under Verra's VCS, the Gold Standard and the Clean Development Mechanism qualify.
- Eligibility rules: the project must meet South Africa's carbon offset criteria, including being located in South Africa.
- Administration: credits are managed and retired through National Treasury's Carbon Offset Administration System.
- The cap: offsets only reduce liability up to the allowance percentage, so buying beyond the cap does not lower the tax bill.
VCU Monetization and REV's Current Market Position
For companies that want to act now rather than after the first Phase 2 assessment, supply is the practical constraint. REV currently maintains direct access to 17,255 Verra-issued VCUs available for corporate acquisition and retirement, indicatively priced at R246 per VCU. Against a 2026 headline rate of R308 per tonne, that is a gap of R62 per tonne offset before costs, within the offset cap and subject to your allowance position.
Three conditions matter. Only credits that meet South Africa's offset eligibility criteria can be applied against carbon tax, so REV confirms eligibility before any transaction. Stock and pricing are indicative and may change. And the true saving depends on your emissions profile and other allowances, so model it with your tax adviser before purchasing.
This article is general information and not tax, legal or investment advice.
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