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TNFD Assess Phase: Turning Nature Dependencies and Impacts into Business Risks and Opportunities

Risk taxonomy, causal pathways, financial effects, prioritisation, materiality and integration with enterprise risk management

Who this is for A 11-minute read for reporting teams working through Dependencies, ecosystem services and nature-related risk, and for reviewers testing whether the evidence behind it holds.

Published passport

Current as at 10 August 2026
RK Reviewed by Dr Ross KurinkoLinkedIn Strategic ESG Advisor · IFRS S1 & S2 / GRI / ESRS expert GRI Certified Global Trainer · PhD, University of Cambridge · ESG-AI expert 15+ years on FTSE 100 & Fortune Global 500 disclosures Canary Wharf, London LRA educational guidance · Not issued or endorsed by TNFD

Edition written against

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Technical limitation: This article does not prescribe a universal risk taxonomy, probability scale, financial valuation method …

Published

10 Aug 2026

Knowledge Hub guide

Last reviewed

10 Aug 2026

Short answer

The answer, before the reasoning

The Assess phase translates the dependency and impact pathways identified in Evaluate into nature-related risks and opportunities for the organisation. It identifies corresponding physical, transition and systemic pathways; tests whether existing controls and risk processes are adequate; measures likelihood, magnitude, velocity and financial effects proportionately; prioritises items against other enterprise risks; and applies the organisation’s stated materiality approach to decide what should be disclosed.

The result should sit inside enterprise risk management, not in a separate biodiversity spreadsheet.

Educational practitioner material. TNFD recommendations and LEAP guidance should be applied to the organisation’s facts, stated materiality approach and reporting context.

Quick orientation

Quick orientation

Quick orientation
Practical answer
Applies to
Dependency and impact pathways with sufficient location, activity and evidence context from Evaluate.
Primary decision
Which nature-related risks and opportunities require treatment, escalation, financial analysis and disclosure?
Key TNFD components
A1 identification; A2 adjustment of existing mitigation/management; A3 measurement/prioritisation; A4 materiality.
Core outputs
Risk/opportunity longlist, ERM-consistent assessment, material shortlist, financial-effect bridge, owners and treatment plans.

Technical status

Current technical position

<p>TNFD’s final 2023 Recommendations ask organisations to describe their processes for identifying, assessing, prioritising and monitoring nature-related issues and how those processes are integrated into overall risk management. A 2026 TNFD discussion paper on risk assessment methods is consultative; it should not be described as changing the final Recommendations unless adopted.</p>

1. Assess begins with a pathway, not a generic ESG risk label

A nature-related risk is easier to govern when the team can trace it back to the dependency or impact, location, activity and external response that creates the business consequence. “Biodiversity risk” is too broad. A useful statement might describe how declining aquifer recharge in a priority basin threatens production continuity, or how habitat conversion in a sourcing landscape creates permit, legal, customer and financing consequences.

In practice

LEAP component Question Output
A1 - Identify What risks and opportunities correspond to the dependencies and impacts? Causal longlist by location, time horizon and business unit.
A2 - Adjust management What existing controls, mitigation and risk processes already address them, and what must change? Control inventory, gap assessment and treatment recommendations.
A3 - Measure/prioritise Which risks and opportunities are most significant relative to other enterprise matters? Likelihood/magnitude assessment, financial-effect analysis and prioritised register.
A4 - Materiality Which items are material under the stated reporting approach and therefore should be disclosed? Approved material shortlist, rationale and linkage to TNFD disclosures.

In practice

2. Use a nature-related risk and opportunity taxonomy

Category How it can arise Illustrative consequences
Physical risk - acute Sudden ecosystem or environmental disruption, for example flood, wildfire, pollution event, pest outbreak or abrupt water restriction. Shutdown, input shortage, damage, emergency cost, liability or health/safety impact.
Physical risk - chronic Longer-term deterioration in ecosystem condition or service availability, such as soil decline, water scarcity, pollinator loss or coastal erosion. Lower yield, higher treatment cost, capex, impaired asset value or reduced productive life.
Transition risk Policy, legal, technology, market, reputation or stakeholder responses to nature loss and impacts. Permit restriction, litigation, due-diligence cost, product redesign, demand shift, loss of market access or financing change.
Systemic risk Breakdown across ecosystems, economies or financial systems, including concentration, contagion and tipping-point effects. Correlated supply failure, portfolio loss, macroeconomic pressure or reduced insurability.
Opportunity Activities, products, services or financing that reduce dependencies/impacts, restore resilience or support better outcomes. Avoided cost, resource efficiency, resilient supply, new revenue, improved access to capital or stakeholder trust.

Rule

Important distinction

<p>An opportunity for the organisation is not automatically a positive impact on nature. Test commercial benefit, dependency reduction, actual nature outcome, additionality, trade-offs and possible rebound effects separately.</p>

3. Build the risk or opportunity pathway

Each register entry should preserve the causal chain. This allows risk owners and finance teams to challenge assumptions and avoids double counting the same issue under several labels.

In practice

Pathway element Illustrative example
Evaluate output Plant depends on reliable freshwater flow in a high physical water-risk basin.
External driver/state change Lower recharge, competing withdrawals, drought and ecosystem degradation reduce availability and quality.
Risk event Operating permit limits withdrawals or the source cannot meet process requirements.
Business exposure Seventy per cent of regional output relies on one facility; alternative supply is limited.
Controls and response Storage, efficiency, recycling, alternative source, supplier/customer plans and basin engagement.
Residual effect Production loss, increased treatment cost, capex, customer penalties and asset impairment risk.
Opportunity pathway Closed-loop water technology and product/process redesign reduce exposure and create a service offering.

4. A2: test existing controls and risk architecture

Nature-related issues often already appear in operational risk, supply-chain risk, credit risk, underwriting, compliance, safety, legal or strategic-risk processes. A2 does not require a new parallel framework if the existing one can be adjusted. The team should test whether taxonomy, ownership, data, thresholds, scenarios, controls and reporting capture the location-specific dependency or impact pathway.

In practice

ERM element Nature-related adjustment
Risk taxonomy Add physical, transition and systemic nature drivers or map them explicitly to existing categories.
Risk inventory Link each risk to dependency/impact pathway, location, activity, evidence and time horizon.
Assessment criteria Include concentration, ecological thresholds, irreversibility, velocity, stakeholder rights and data uncertainty where decision-relevant.
Controls Distinguish preventive, detective, corrective and adaptive controls; test design and operating effectiveness.
Risk appetite/tolerance Clarify where impacts, permit conditions, ecosystem thresholds or community rights create hard constraints rather than tradable scores.
Monitoring Use leading indicators for impact drivers/state/service availability and lagging indicators for incidents and financial outcomes.
Governance Assign risk owner, action owner, data owner, escalation body and board/committee oversight.

5. A3: measure likelihood, magnitude and financial effects proportionately

A credible assessment uses the organisation’s ERM language where possible, but may need additional criteria. Likelihood can be difficult where ecological change is non-linear or data are sparse. Avoid converting uncertainty into spurious decimal precision. Use ranges, scenarios and confidence ratings where these provide a more honest decision basis.

Financial-effects bridge

The financial analysis should connect the pathway to the organisation’s existing planning and accounting processes. Relevant effects can include revenue volume or price, operating cost, capital expenditure, provisions and liabilities, asset values and useful lives, insurance availability, financing cost, credit loss, cash flow and capital allocation. Quantify where decision-useful and supportable; otherwise provide a structured qualitative assessment, range or scenario with assumptions and an improvement plan.

Figure 1. From Evaluate output to risk/opportunity assessment, financial effects and ERM decision. London Reporting Academy visual.

In practice

Dimension Questions
Exposure Which assets, products, suppliers, customers, portfolios or geographies are exposed, and how concentrated is the exposure?
Likelihood and time horizon What event or transition could occur; over which short, medium and long-term horizons; and how certain is the evidence?
Magnitude What is the potential operational, strategic, legal, reputational or financial size and scope?
Velocity and persistence How quickly could the effect emerge, how long could it last and how reversible is it?
Interconnections Could several locations, commodities or counterparties fail together; are there tipping points or contagion effects?
Control effectiveness What is gross exposure, what controls operate, and what residual risk remains?
Opportunity feasibility What investment, capabilities, partners and safeguards are needed; what nature outcomes and trade-offs arise?

In practice

Financial line Nature pathway question Evidence/control
Revenue and margin Could supply, production, demand, price or market access change? Commercial forecast, customer contracts, sensitivity analysis.
Operating costs Will treatment, inputs, compliance, insurance, logistics or remediation costs change? Budget owner, cost model, supplier evidence and scenarios.
Assets and capex Does the pathway alter useful life, capacity, location viability or required investment? Asset register, engineering assessment, capex plan and impairment indicators.
Liabilities/provisions Could legal, restoration, compensation or decommissioning obligations arise? Legal analysis, permit terms, claims and probability/range assessment.
Financing and capital Could risk affect credit terms, collateral, ratings, underwriting or allocation? Treasury/lender dialogue, portfolio analytics and capital plan.

6. Prioritisation and materiality

Prioritisation supports management action; materiality determines disclosure under the stated reporting approach. The two decisions may use related evidence but should not be collapsed into one unexplained score. A high-severity impact may require action even if the immediate financial effect is not material; a financially material risk may arise from a dependency even where the organisation has not established a severe external impact.

State the materiality lens and definitions used for the disclosure.

Compare nature-related risks and opportunities with other enterprise risks using compatible criteria, while retaining nature-specific factors.

Keep the longlist, screening rationale and items under monitoring; do not preserve only the final shortlist.

Document thresholds, overrides, dissent and governance approval.

Explain data quality and how uncertainty affected prioritisation.

Link every material item to Strategy, Risk and impact management, Metrics and targets, and relevant priority locations.

In practice

7. Enterprise risk integration workflow

Step Action Output/control
1 Import Evaluate pathways with stable location and pathway IDs. Traceable longlist; no generic topic-only entries.
2 Identify physical, transition, systemic and opportunity pathways. Causal statements and time horizons.
3 Map existing controls and risk processes. Control/gap register; gross versus residual distinction.
4 Assess exposure, likelihood, magnitude, velocity and interconnection. ERM-consistent assessment with confidence rating.
5 Connect significant pathways to financial planning and line items. Finance bridge, estimates, ranges and assumptions.
6 Prioritise relative to other enterprise risks and opportunities. Management shortlist and treatment sequencing.
7 Apply the stated materiality approach for disclosure. Approved material list and rationale.
8 Assign owners, responses, indicators, escalation and review triggers. Integrated risk register and monitoring pack.

Hypothetical scenario

Illustrative scenario

<p>A packaging manufacturer sources fibre from two landscapes and operates a mill in a water-stressed basin. Evaluate identifies a dependency on water flow and impacts linked to habitat conversion in part of the fibre supply. Assess separates: (1) chronic physical risk from water restrictions; (2) transition risk from due-diligence and customer requirements; (3) systemic risk from regional forest degradation and correlated supplier failure; and (4) an opportunity from recycled fibre and landscape restoration partnerships. Finance models production downtime and capex ranges, while procurement tests supplier substitution. The board receives gross and residual risk, confidence, priority locations and treatment decisions rather than one aggregated biodiversity score.</p>

Illustrative only. It shows how the decision is made, not wording that can be copied or relied on.

In practice

9. Example risk-register fields

Field Illustrative content
Risk/opportunity ID and owner Stable ID; accountable executive; business unit; committee.
Dependency/impact pathway Evaluate pathway ID, location, activity, nature interface and evidence.
Risk category and event Physical/transition/systemic/opportunity; event or change that creates the effect.
Exposure and time horizon Assets, products, suppliers, portfolios; short/medium/long term.
Gross assessment Likelihood, magnitude, velocity, concentration, uncertainty.
Controls and residual assessment Control design/effectiveness; residual level; gaps.
Financial effect Affected line item, range/scenario, assumptions, owner and model version.
Decision Prioritise, monitor, accept, avoid, reduce, transfer, collaborate or invest.
Disclosure/materiality Lens, threshold, conclusion, approver and linked TNFD disclosure.

In practice

10. Common mistakes and corrections

Mistake Consequence Correction
Starting with a generic “biodiversity risk” register No causal link, location or management lever. Start from Evaluate pathways and write a specific event/exposure/effect statement.
Using one global likelihood score Local conditions, time horizons and concentration disappear. Assess by relevant location/portfolio segment and aggregate only where characteristics are shared.
Ignoring existing controls Gross and residual risk are confused. Inventory controls, test effectiveness and state treatment gaps.
Assuming an opportunity is nature-positive Commercial gain is presented as environmental outcome. Assess business benefit, nature outcome, additionality and trade-offs separately.
No finance bridge Risks remain outside budgets and capital allocation. Assign finance owners and connect to line items, ranges and scenarios.
Hidden materiality override A final shortlist cannot be reproduced. Retain criteria, thresholds, override rationale and approval.
Separate nature spreadsheet ERM owners do not monitor or escalate the issue. Integrate IDs, owners, indicators and governance into existing risk systems.

Readiness

11. Assess readiness checklist

  • Every risk and opportunity links to a specific dependency or impact pathway and location.
  • Physical, transition, systemic and opportunity categories have been considered.
  • Existing controls and risk processes are mapped and their effectiveness assessed.
  • Gross and residual risk are distinguished.
  • Exposure, likelihood, magnitude, velocity, concentration and uncertainty are treated proportionately.
  • Financial effects connect to budgets, forecasts, assets, liabilities, cash flow or capital as relevant.
  • Scenario analysis is used where uncertainty and strategic resilience warrant it.
  • Nature-related risks are compared with other enterprise risks without losing nature-specific factors.
  • Prioritisation and disclosure materiality are documented as related but separate decisions.
  • Longlist, shortlist, monitored items and rejected items retain rationale and evidence.
  • Owners, indicators, treatment actions, escalation and reassessment triggers are in the ERM system.
  • Material items are linked to the relevant TNFD recommended disclosures and priority locations.

Take it with you

The checklists as a working spreadsheet

Every checklist and table on this page, with empty status, owner and evidence columns for your team to fill in and keep.

Download .xlsx

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