Environmental Costs: Methods, Challenges and the Management Accountant’s Role

Environmental cost is not one number. A fine for polluting is one kind. The cost of a clean-up that may fall due in ten years is another. The treatment plant that an environmental team runs is a third. The sales lost because customers saw a spill on the evening news is a fourth, and most of it will never appear under its own heading in the ledger.

Before a company can manage environmental cost it must find it, classify it and trace it to the products and activities that cause it.

This topic explains how environmental costs are classified, how environmental activity based costing and environmental life cycle costing work, the methods of accounting for environmental costs, the challenges and how to meet them, how to design a system for social and environmental reporting, and the roles of the management accountant. It builds on the environmental management accounting topic.

The next topic starts decision making with relevant costs and revenues and opportunity cost.

Classifying and tracing environmental costs

In traditional systems environmental costs and benefits are often hidden. EMA tries to identify them and bring them to management’s attention. A useful classification distinguishes:

• Conventional costs: costs of materials and energy that have environmental relevance and can be captured in costing systems.
• Potentially hidden costs: environmental costs lost within general overhead.
• Contingent costs: costs that may be incurred in the future, such as clean-up costs.
• Image and relationship costs: costs of promoting an environmental image, such as producing environmental reports, and the cost of behaving irresponsibly, such as lost sales after a major environmental disaster.

Environmental activity based accounting

This applies activity based costing to environmental costs. It separates:

• Environment-related costs: costs attributable to cost centres that deal with environmental activity, such as an incinerator or a waste recycling plant.
• Environment-driven costs: overhead costs that arise from environmental factors, such as higher labour cost or depreciation.

Cost drivers for environment-related costs include the volume of emissions or waste, the toxicity of emissions or waste, environmental impact added (units multiplied by the impact of each unit) and the volume of waste treated. Charging by impact, not by units made, shows which products really cause the cost.

Environmental life cycle costing

Life cycle costing looks at the costs of a product over its whole life: introduction, growth, maturity, decline and withdrawal. Environmental life cycle costing includes the environmental costs at each stage, such as the cost of disposing of packaging or products. A photocopier maker that leased its machines found that single-use packaging had to be bought for each delivery and disposed of when machines were returned.

Looking at the whole life, it moved to standard reusable packaging for delivery and return, which saved money and reduced waste.

Methods, challenges and the management accountant’s role

Methods of accounting

• Environmental management accounting emphasises managing resources and internal decisions by identifying, analysing and measuring the environmental costs and benefits of operations.
• Sustainability accounting emphasises evaluating and disclosing reliable information about a company’s social, environmental and economic performance, such as energy use, social impact and greenhouse gas emissions. Its goals are a full picture of sustainable development, engagement with stakeholders, and identification of where to improve.

Challenges, and what to do about them

• Measurement is imprecise. Environmental costs are hard to measure with scientific accuracy. Remedy: improve measurement, using physical data such as tonnes and litres as well as money.
• Weak accounting mechanisms. Systems have flaws and often capture only costs that are disclosed. Remedy: design systems for the classification above.
• Reporting only through disclosure. Environmental information has often been reported in narrative, not built into decisions. Remedy: integrate it into budgets and appraisals.
• Uneven legal support and attention. Where enforcement is weak, organisations pay little attention. This has changed in Nigeria, with the Climate Change Act 2021 and mandatory IFRS S1 and S2 reporting from 2028 for public interest entities, but guidance and practice are still developing. Remedy: a company strategy for environmental accounting.
• Qualitative and long-term effects are hard to value, and benefits may come far into the future.

Setting up social and environmental reporting

Traditional performance systems serve owners and are extensions of financial reporting, so they do not explain environmental and social effects. To design a suitable system a company should:

• (1) identify its stakeholders
• (2) find out what aspects of performance matter to each group
• (3) design metrics for each area
• (4) set targets and communicate them
• (5) design information systems that integrate data collection and processing against these metrics
• (6) introduce transparent reporting to stakeholders

Typical measures are energy use, carbon dioxide emissions, non-recycled waste, community donations, workforce diversity, employee satisfaction and injury rates.

The management accountant’s role

Sustainability aims at social progress for everyone, effective protection of the environment, prudent use of natural resources, and stable economic growth. The management accountant works with three kinds of capital: physical capital (buildings, machines, infrastructure, the accountant’s usual concern), human and social capital (people’s skills and the relationships and norms of society), and natural capital (natural resources and ecological services such as water, energy and climate stability). The roles are:

• use strategy, budgets and policies to set performance targets;
• advise managers with the best information available;
• take part in decisions and strategy formulation;
• design the systems to collect and report environmental and social data.

Two drivers help the accountant: cost saving, by analysing data on environmental and social spending to use resources better, and risk management, by identifying and managing environmental risks.

Reporting rules the data must meet

IFRS S1 requires disclosure of sustainability-related risks and opportunities under four headings: governance, strategy, risk management, and metrics and targets. IFRS S2 requires climate-related disclosures, including the entity’s greenhouse gas emissions in three scopes: direct emissions (scope 1), emissions from purchased energy (scope 2) and other indirect emissions in the value chain (scope 3).

Nigeria has adopted both without change, and the Financial Reporting Council of Nigeria’s amended 2026 roadmap makes them mandatory for public interest entities for periods beginning on or after 1 January 2028. Under the Climate Change Act 2021, private entities with 50 or more employees must designate a climate change or environmental sustainability officer. The management accountant’s emissions and cost data must therefore be reliable enough to be assured. Confirm current regulator notices before advising a real client.

Sources and references

• IFRS S1 and IFRS S2, International Sustainability Standards Board.
• Financial Reporting Council of Nigeria, Roadmap Report for the Adoption of IFRS Sustainability Disclosure Standards in Nigeria (amended 2026).
• Climate Change Act 2021.

These points are stated as at 6 November 2026.

Layouts

1. Impact units for a product = units × impact per unit (for example a toxicity score).
2. Rate = environmental cost pool ÷ total impact units. Charge = rate × product impact units. Per unit = charge ÷ units.
3. Volume basis comparison = pool ÷ total units × product units.
4. Saving from a life cycle change = old cost per cycle − new cost per cycle; × cycles.

Money is in naira and ₦ million, and each answer is rounded once at the end.

Worked examples

1. Impact units.
   X 40,000 × 1 = 40,000
   Y 20,000 × 3 = 60,000
   Z 10,000 × 6 = 60,000.
   Total 160,000.
2. Rate.
   8,400,000 ÷ 160,000 = ₦52.50 per impact unit.
3. Charge. X ₦2,100,000; Y ₦3,150,000; Z ₦3,150,000. Total 8,400,000.
4. Per unit. X ₦52.50; Y ₦157.50; Z ₦315.
5. Comment.
   On a volume basis each unit would carry 8,400,000 ÷ 70,000 = ₦120, so X would be over-charged and Z under-charged.
   The result tells management that Z and Y should be priced or redesigned to reduce their impact.

1. Single-use.
   4,200 + 1,300 + 3,900 = ₦9,400 a cycle.
2. Reusable.
   12,000 ÷ 8 = 1,500
   plus cleaning 600 = ₦2,100 a cycle.
3. Saving.
   9,400 − 2,100 = ₦7,300 a cycle
   × 5,000 = ₦36,500,000 = ₦36.5m a year.
4. Waste avoided.
   5,000 × 18 = 90,000 kg = 90 tonnes a year.
5. Comment. The gain was found only by costing the whole life of the packaging, including disposal.

Expect variants: several pools with different drivers, a toxicity score, a disposal cost that rises each year, or a request to classify listed costs.

Common mistakes

• Listing environmental costs without classifying them. Name the four types and give an example of each.
• Using units made as the driver. Use waste volume, toxicity or impact.
• Forgetting contingent costs that fall in future years.
• Presenting the challenges without remedies.
• Saying Nigeria has no law on the subject. The Climate Change Act 2021 and the IFRS S1 and S2 timetable now apply.
• Describing the management accountant only as a number provider. The role includes advice and strategy.

Quick revision

• Four types: conventional, potentially hidden, contingent, image and relationship.
• Environmental ABC: environment-related and environment-driven costs; drivers by volume, toxicity and impact.
• Environmental life cycle costing: include environmental cost at every stage.
• Methods: EMA (internal decisions) and sustainability accounting (evaluation and disclosure).
• Roles: targets, advice, strategy; drivers cost saving and risk management; physical, human and natural capital.
• Reporting system: stakeholders, interests, metrics, targets, information systems, transparent reporting.

How the marks are earned

• Classify: a mark for each type, with an example.
• Calculate: impact units, rate, charge, per unit, and the comparison with a volume basis.
• Discuss: challenges with remedies; the accountant’s roles tied to the business.

Practice questions

These are original questions, written in the style of the Skills examination. Work each one before you open the answer.

Recall check: multiple choice

Section B style: written questions

Model answers

Spotted a mistake? Tell us and we will check it.