Introduction

The winner’s curse in an energy procurement auction arises when the successful bidder wins by offering an electricity tariff or project price that is unrealistically low because it has underestimated construction costs, financing expenses, fuel or technology risks, grid-connection costs, inflation, or other project obligations. The bidder may subsequently struggle to reach financial close, delay construction, seek contractual renegotiation, or abandon the project. In public energy procurement, winner’s-curse mitigation is therefore important for protecting value for money, security of electricity supply and the credibility of competitive auctions.

South African law does not establish a separate statutory doctrine called the “winner’s curse”. Instead, the risk is managed through constitutional procurement principles, detailed tender requirements, financial and technical qualification criteria, guarantees, and contractual enforcement.

Constitutional and Regulatory Framework

Section 217(1) of the Constitution requires public procurement to operate through a system that is fair, equitable, transparent, competitive and cost-effective. These principles apply when government structures electricity procurement so that competition produces sustainable rather than merely nominally cheap bids.

The Public Procurement Act 28 of 2024 was enacted to establish a unified procurement framework, but the Constitutional Court declared the Act invalid in September 2026 because of defects in the manner in which it was adopted. Public procurement nevertheless remains subject to section 217 and the applicable procurement legislation and administrative-law principles.

Prequalification and Financial Capability

A major winner’s-curse safeguard is requiring bidders to demonstrate capacity before their prices are evaluated. South Africa’s IPP procurement programmes use minimum technical, financial, legal and economic-development qualification requirements. In the Risk Mitigation IPP Procurement Programme, bidders had to demonstrate financial backing, provide a financier-supported bid guarantee, establish technical capability and confirm grid-access arrangements before competing on price.

This prevents an apparently cheap but technically or financially non-viable bid from automatically winning solely because it offers the lowest tariff.

Financial Models and Bid Guarantees

Energy-auction authorities can require detailed financial models demonstrating capital costs, operating expenses, financing assumptions, expected generation and revenue. Energy-storage procurement documents, for example, have required both a working financial model and a bid guarantee as conditions for acceptance.

Bid guarantees, preferred-bidder guarantees and performance security discourage speculative bidding because bidders face financial consequences if they win but fail to conclude required agreements or achieve contractual milestones. REIPPPP documentation has specifically used preferred-bidder guarantees to enforce obligations associated with financial close and project implementation.

Price Evaluation and Due Diligence

Winner’s-curse mitigation also requires authorities to assess whether proposed prices are credible against project costs and technical assumptions. Procurement design may examine financing arrangements, technology performance, land rights, environmental authorisations and grid connection before final award.

However, authorities must apply such tests consistently. A procuring institution cannot introduce undisclosed affordability or viability requirements after bids have been submitted, because doing so may violate transparency and equal treatment.

CASE LAW

AllPay Consolidated Investment Holdings (Pty) Ltd v CEO of SASSA 2014 (1) SA 604 (CC)

Facts: AllPay challenged the award of a major public tender, alleging material departures from prescribed tender requirements.

Legal Issue: Whether deviations from procurement rules rendered the award unlawful.

Judgment: The Constitutional Court held that compliance with legally prescribed procurement requirements is mandatory and that material irregularities must be assessed against constitutional procurement standards.

Legal Principle/Ratio: Tender rules must advance equal treatment, transparency, competitiveness and efficiency.

Significance: Energy authorities may impose robust viability safeguards against underpriced bids, but those requirements must be disclosed and applied equally to every bidder.

Steenkamp NO v Provincial Tender Board, Eastern Cape 2007 (3) SA 121 (CC)

Facts: A tender award was found to have resulted from an administratively defective procurement process.

Legal Issue: What legal obligations govern public tender boards and competing bidders?

Judgment: The Constitutional Court emphasised that procurement bodies must exercise their powers fairly, impartially, transparently and within their statutory authority.

Legal Principle/Ratio: Tender processes require disciplined compliance with prescribed procurement requirements.

Significance: Financial-security and viability rules intended to prevent unsustainable energy bids must be objectively administered rather than selectively relaxed.

Conclusion

Winner’s-curse mitigation in energy auctions therefore combines prequalification, realistic financial modelling, bid and performance guarantees, technical due diligence, grid-readiness requirements and enforceable project milestones. The objective is not simply to obtain the lowest electricity price, but to procure energy at a price that remains deliverable throughout financing, construction and operation while preserving the constitutional requirements of fairness, transparency, competitiveness and cost-effectiveness.