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Definition

ESG integration Definition

ESG integration is the systematic use of financially material environmental, social and governance information in investment analysis and decisions to improve the assessment of risk and return.

What is ESG integration?

ESG integration puts financially material environmental, social and governance information inside the same analysis used for forecasts, valuation, credit assessment, security selection and portfolio construction. Material means the information could change expected risk or return for the investment objective, time horizon and asset under review. The CFA Institute, GSIA and PRI definition requires ongoing consideration in both analysis and decision-making. A policy or data appendix that never affects either is not integration.

Why does ESG integration matter to you?

If your company is under review, an investor may ask for energy use, emissions, safety records, labour disputes, regulatory breaches, board controls and the cost and timing of corrective work. The useful answer includes the reporting period, entity boundary, source document, calculation method, limitation and named owner.

If you manage capital, an investment committee, asset owner or client may ask where that information changed a forecast, valuation assumption, credit view, portfolio weight or approval condition. If the analysis records an ESG issue but the decision file shows no assessment of its financial relevance, you may miss a risk and cannot demonstrate a systematic process.

How does ESG integration work?

Start with the investment objective, asset type and holding period. Identify sector-specific issues that could affect cash flows, capital spending, financing, asset life or legal exposure. Collect company records and outside data, test their quality, and decide which issues are material. Translate each material issue into the normal investment work: adjust a forecast, run a sensitivity, change a credit assumption, add an approval condition or alter a portfolio weight.

Record the source, assumption, model change, decision effect, owner and next review date in the investment memo. Reassess the issue when new data, regulation or operating events change the facts. Keslio's investment strategy development supports policies and guidelines that connect this work to investment and portfolio decisions.

What mistakes should you avoid?

  • Using one vendor score without checking the operational issue and data beneath it.
  • Listing a material issue in an appendix while leaving the model and decision unchanged without explanation.
  • Treating every ESG topic as equally material across sectors, assets and holding periods.
  • Claiming integration because a policy exists when no investment memo shows the analysis and decision effect.

Is ESG integration the same as excluding investments?

No. An exclusion rule removes an investment that meets a stated condition. ESG integration assesses material ESG information alongside other financial information. It can support an investment, change its terms or assumptions, or count against it without automatically excluding it.

Does ESG integration require an ESG score?

No. A score can be one input, but it can hide differences in method, coverage and weighting. Keep the underlying measures and documents, then assess the issues that could affect the specific investment's risk and return.

What should you send when an investor asks how ESG is integrated?

Send the relevant policy, issue list, data sources, materiality note and a redacted investment memo or model-change log. The file should show who reviewed the issue, which assumption or decision it affected, any approval condition, and the next monitoring date.

Example

Suppose a fund is evaluating a hypothetical paper mill in Singapore. The mill reports 60,000 MWh of purchased electricity for 2024, equal to 60,000,000 kWh. The Keslio factors dataset uses Singapore's 2024 average grid emission factor of 0.402 kg CO2/kWh, published by the Energy Market Authority in Singapore Energy Statistics 2025. The factor covers CO2, not all greenhouse gases.

Current estimate: 60,000,000 kWh x 0.402 kg CO2/kWh = 24,120,000 kg CO2, or 24,120 metric tonnes CO2. An energy audit identifies a hypothetical efficiency plan that would reduce annual use by 6,000 MWh. The corresponding estimate is 6,000,000 kWh x 0.402 = 2,412,000 kg CO2, or 2,412 tonnes. Post-project electricity emissions would be 21,708 tonnes CO2.

The investment team carries the 6,000 MWh reduction into its operating assumptions, records the equipment cost and delivery date in its capital-spending case, and compares the base and post-project cash flows. It asks for electricity bills, the energy audit, supplier quotes, the capital-spending schedule and an implementation date. The investment committee uses the two cases to decide whether the equipment plan and evidence deadline should be conditions of investment approval. The team does not assume the project will proceed or improve returns until the cost and delivery evidence support that conclusion.

Where it comes up

PRI Principle 1 incorporation of ESG issues into investment analysis and decision-making processesPRI, the six Principles, Principle 1Official sourceCFA Institute, GSIA and PRI ESG integration essential elements and decision-making componentsDefinitions for Responsible Investment Approaches, ESG Integration, pp. 8-9Official source

Related terms

Responsible Investing

Responsible investing considers environmental, social and governance information when investors allocate capital, manage holdings and use their influence to pursue stated financial objectives and, where applicable, sustainability objectives.

Materiality

Materiality is the test a company uses to decide which sustainability topics matter enough to manage or report because they could affect its finances, reflect significant impacts on people or the environment, or both.

Climate-related transition risk

Climate-related transition risk is the financial risk that policy, legal, technology, market, or reputation changes create as economies move towards lower greenhouse gas emissions.

Physical climate risk

Physical climate risk is the potential for acute events or chronic climate shifts to damage assets, interrupt operations, disrupt supply chains, and change revenue, costs, cash flows, financing, or insurance.

Climate scenario analysis

Climate scenario analysis tests how your strategy, business model and financial performance could change under several plausible climate futures, including physical hazards and policy, market and technology shifts.

Sources

Last verified 2026-08-19

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ESG integration Definition | Keslio