Environmental and restoration provisions

Factories leave marks on the land, and environmental law increasingly makes their owners pay to clear them up. Whether and when that cost becomes a provision depends on what has already happened, not on what might. This guide takes three situations at one plant, contamination, dismantling and new emission rules, and shows how IAS 37 treats each.

By Muhammad Bilal, Chartered Accountant. Reviewed by Awais Jameel, Chartered Accountant. 3 minute read.

Short answer

Environmental provisions are recognised under IAS 37 when a manufacturer has a present obligation, legal or constructive, from a past event, such as contamination it has already caused, and the cost can be estimated reliably. Clean-up of past contamination is expensed, while the obligation to dismantle a plant and restore its site is added to the plant's cost. Costs of complying with future rules, such as fitting new filters, are not provided for, because the manufacturer can still avoid them by changing how it operates. In this guide's example, a 2 million clean-up due in 3 years needs a provision of 1,727,675.

At a glance

Standard
IAS 37, with IAS 16 and IFRIC 1
Past contamination
Provision, expensed
Dismantling and restoration
Provision, added to the plant
Future compliance
No provision
Measurement
Best estimate, discounted
Constructive obligations
Published policies count
Environmental and restoration provisionsStandard: IAS 37, with IAS 16 and IFRIC 1; Past contamination: Provision, expensed; Dismantling and restoration: Provision, added to the plant; Future compliance: No provision; Measurement: Best estimate, discounted; Constructive obligations: Published policies count.KEY FACTS AT A GLANCEEnvironmental and restoration provisionsStandardIAS 37, with IAS 16 andIFRIC 1Past contaminationProvision, expensedDismantling and restorationProvision, added to theplantFuture complianceNo provisionMeasurementBest estimate, discountedConstructive obligationsPublished policies countTax BakersEnvironmental and restoration provisionsStandard: IAS 37, with IAS 16 and IFRIC 1; Past contamination: Provision, expensed; Dismantling and restoration: Provision, added to the plant; Future compliance: No provision; Measurement: Best estimate, discounted; Constructive obligations: Published policies count.KEY FACTS AT A GLANCEEnvironmental and restorationprovisionsStandardIAS 37, with IAS 16 and IFRIC 1Past contaminationProvision, expensedDismantling and restorationProvision, added to the plantFuture complianceNo provisionMeasurementBest estimate, discountedConstructive obligationsPublished policies countTax Bakers
Key facts at a glance, as set out in this guide.

Three environmental situations at one plant

Three environmental situations at one plantThree environmental situations at one plantProvision?DebitPastcontaminationYes, nowExpenseDismantling andrestorationYes, nowPlant costFuturecomplianceNoNothing yetFines fora breachWhen breachedExpense
The past event, not the future cost, decides.

Environmental provisions: the numbers

SituationObligationProvision at 5%Debit
Soil contamination found, clean-up required by law in 3 years2,000,0001,727,675Expense
Licence requires dismantling and restoring the site in 20 years3,000,0001,130,668Cost of the plant
New law requires emission filters from 2028, costing 1,500,000None yetNilNothing

The contamination provision unwinds by about 86,384 in the first year as a finance cost. The dismantling cost of 1,130,668 is depreciated with the plant, and the provision unwinds over the 20 years.

Why is past contamination provided for immediately?

Because the obligating event, polluting the land, has already happened, and the law requires it to be cleaned up whatever the manufacturer does next. The cost does not create a new asset, so it is expensed. If the manufacturer has a published environmental policy of cleaning up contamination it causes, even where the law does not require it, and has honoured that policy in the past, it has a constructive obligation and provides in the same way.

Why are future compliance costs not provided for?

A new law requiring filters from 2028 does not create an obligation today: the manufacturer could avoid the cost by closing the plant, changing its process or buying different equipment. IAS 37's own example on smoke filters reaches this conclusion. The filters will be capitalised when bought. If the plant later operates without them in breach of the law, a provision for fines arises then, because the breach is the obligating event.

How are environmental provisions measured?

At the best estimate of the cost to settle the obligation, using current technology and prices adjusted for expected changes, the expected value across possible outcomes where there is a range, and discounted at a pre-tax rate where the effect is material. Expected recoveries from insurers or previous owners are recognised as a separate asset only when they are virtually certain.

How are changes in estimates treated?

For dismantling and restoration added to the plant's cost, IFRIC 1 requires changes in the estimated cost, timing or discount rate to adjust the plant's carrying amount, depreciated prospectively. For contamination provisions that were expensed, changes go straight to profit or loss. Remediation work that turns out cheaper than expected releases part of the provision.

What about obligations for waste products?

Manufacturers selling electrical and electronic equipment in some markets must pay for collecting and recycling waste equipment. Under IFRIC 6, for historical household equipment, the obligating event is participating in the market during the measurement period that sets each producer's share of the costs, not making or selling the products, so the provision arises only then. Producer responsibility schemes for packaging work in a similar way, and the scheme's rules decide when the obligation arises.

When is an environmental issue only a contingent liability?

When it is not yet probable that the manufacturer will have to pay, for example while a regulator investigates whether it caused pollution, or when the amount cannot be estimated reliably, which is rare. The manufacturer then discloses the matter unless an outflow is remote. See contingent liabilities.

How does US GAAP differ?

US GAAP treats environmental remediation liabilities under ASC 410-30, generally without discounting unless the amount and timing of payments are fixed or reliably determinable, and asset retirement obligations under ASC 410-20 at fair value. See IAS 37 explained, decommissioning costs, telecom site restoration and manufacturing accounting.

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Questions people ask

When is an environmental provision recognised under IAS 37?

When there is a present legal or constructive obligation from a past event, such as contamination already caused, an outflow is probable and the cost can be estimated reliably.

Is the cost of cleaning up contamination capitalised?

No. Clean-up of past contamination is expensed; only dismantling and restoration obligations for a plant are added to its cost.

Are future environmental compliance costs provided for?

No. The manufacturer can still avoid them by changing how it operates, so there is no present obligation.

Are environmental provisions discounted?

Yes, under IAS 37 where the effect is material; US GAAP generally does not discount remediation liabilities.

Sources

Every fee, date and rule on this page was taken from these official and primary sources.

  1. IFRS Foundation: IAS 37 Provisions, Contingent Liabilities and Contingent Assets
  2. IFRS Foundation: IAS 16 Property, Plant and Equipment

Rules and fees change. If you are reading this long after October 6, 2026, confirm the figures with the source before you rely on them.

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This guide is general information. It is not tax or legal advice for your situation.