How to Put Climate Risk into Tender Specifications and Bid Evaluation

Where climate risk lives in a tender: three layers

The recurring mistake is treating climate risk as one generic paragraph. In practice it touches three distinct parts of the documentation: the technical specification (what must be delivered and under what conditions), the selection stage (whether the bidder is capable of meeting it), and the award stage (how well the bidder proposes to deliver it). Each layer answers a different question and needs a different instrument.

Begin by deciding whether the theme is even relevant and proportionate for this particular contract. Guidance for Scottish public procurement is explicit that requirements must relate to the characteristics of the work, supply or service being purchased. A low-risk goods purchase does not justify elaborate climate plans that add cost and push out capable smaller bidders. Scope first: assess the criticality of the asset, its vulnerability, and the hazards most likely to hit it.

• Decide whether the issue is adaptation of works or services, or resilience of essential supply.
• Run a scoping screen for criticality, vulnerability and hazards before drafting any clause.
• Document why each requirement is relevant and proportionate to the subject matter.

Writing the specification around outcomes and named hazards

Technical specifications should be measurable and tied to the subject matter. Instead of demanding something 'climate-resilient' in the abstract, name the hazards that matter — flooding, heat, storms, loss of site access — and the plausible frequency for the contract's location and term. Then require the design, materials or service-delivery method to manage those scenarios across the asset's life cycle.

For construction and infrastructure, state that the project must minimise vulnerability to known and anticipated climate change across design, construction, operation, maintenance and dismantling, and that materials must account for projected extreme events while still meeting quality and performance standards. For services, require a method statement that assesses how heat, flooding and other events could disrupt delivery and how continuity will be maintained through remote provision, alternative access or standby local partners.

Give every bidder the same baseline. Analysis by the World Bank on performance-based contracts stresses that the asset owner should determine the asset's criticality, vulnerability and the climate threat — steps that shape the design standards — and that specifications should mandate the use of climate projections to set design storm and other parameters. When all bidders work from the same scenarios and time horizons, their proposals become genuinely comparable.

• For works: the project minimises vulnerability across the full life cycle.
• For services: a method statement covers continuity and alternative delivery.
• Mandate climate projections for design parameters and share scenarios with the market.

Selection: minimum capability versus scored award

Separate the question of whether a bidder can perform from the question of how well it proposes to perform. Confusing the two creates legal exposure and muddies evaluation. Use the selection stage for eligibility: evidence of relevant experience, self-assessment questionnaires and minimum competence requirements, including climate adaptation expertise where it matters.

A useful discipline comes from Scottish guidance refreshed in 2026: bidder climate change plans should be assessed on a pass/fail basis only and should not be scored as a separate evaluation criterion, and they should be requested only where relevant and proportionate. That lets you gate capability at selection while reserving points for genuinely differentiating content such as method statements at award.

For subcontractors and suppliers, practical instruments include self-assessment questionnaires. The Chancery Lane Project publishes a construction supplier climate questionnaire that asks subcontractors to self-assess against the client's stated expectations, establishing a baseline and flowing climate requirements down the chain rather than leaving them with the prime contractor alone.

• Mixing selection and award creates legal and evaluation risk.
• Pass/fail minimums gate capability; scored criteria reward quality of solution.
• Self-assessment questionnaires extend climate expectations to subcontractors.

Scoring the bids: weighting, the method statement and objectivity

Where climate is material, ask one concrete award question: how the bidder will assess climate risks to delivery of this contract and what measures it will take, in a way that can be objectively monitored through contract management. Before the tender is released, agree on what an excellent response looks like, and make sure the evaluation panel has the skills to recognise it.

Give the climate sub-criterion a weight that matches its real influence on outcomes. In most regimes the award must rest on the most economically advantageous tender with measurable criteria, so climate quality, life-cycle cost and environmental characteristics can all be reflected. Some markets use notional discounts or life-cycle costing that internalises a carbon price; others reserve a defined share of points for environmental and resilience criteria. Whatever mechanism you use, it must be transparent and grounded in the applicable procurement rules.

Evaluators should reward evidence — a risk register, a business continuity plan naming the relevant hazards, an adaptation action plan, mapped supply chains — rather than generic statements that a bidder has a policy. A stated policy counts only if the bidder shows how it applies concretely to this contract and how its performance can be monitored.

• Ask one concrete evaluation question per material risk.
• Weight climate criteria in proportion to their influence on outcomes and life-cycle cost.
• Reward evidence and verifiable monitoring, not generic corporate policy.

Contract terms, risk allocation and monitoring

Allocation matters as much as drafting. Foreseeable climate events should not be parked in force majeure; each risk is better assigned to the party best able to manage it. In performance-based contracts, consequences such as repair and operational costs and KPI deductions sit with the contractor, while the owner sets the baseline, the hazard scenarios and the design parameters the contractor must meet.

Write the commitments into the contract with KPIs and reporting: maintenance and operating history that reveals trends in climate risk, periodic reviews of the adaptation action plan, immediate notice of supply-chain changes, and climate adaptation expertise among key personnel. Climate risk should stay alive in contract management rather than ending at award.

• Assign each foreseeable risk to the party best able to manage it.
• Build in KPIs, adaptation-plan reviews and operating-history reporting.
• Require climate adaptation competence among key personnel.

Limitations and common pitfalls

Eco-labels and certificates tend to verify climate mitigation — emissions reduction — more than adaptation, so relying on a label alone is weak evidence of climate resilience. Check that the standard or label you cite actually certifies the adaptive outcome you need, and note that adaptation labelling is less mature across the market.

Keep the burden proportionate for SMEs and avoid over-engineering low-risk tenders. Climate projections carry inherent uncertainty, so choose scenarios and horizons, state them clearly, and be transparent about residual risk. This article is general practical guidance, not legal or technical advice for a specific jurisdiction; always check the rules that apply to your own procurement framework and contract law.

• Adaptation labels are less mature than mitigation labels; verify against the outcome you need.
• Keep the SME burden proportionate to the actual risk.
• Disclose projection uncertainty and separate general guidance from professional advice.