A decommissioning obligation can affect the cost of a plant, mine, leasehold installation or other item of property, plant and equipment years before the cash is actually paid. The accounting problem is easy to miss because two standards work together: Ind AS 16 determines when the initial dismantling or site-restoration estimate becomes part of the asset's cost, while Ind AS 37 determines whether a provision exists and how that liability is measured.
The practical question is not simply, “How much will cleanup cost at the end?” Finance first has to establish that a present obligation exists, measure the liability on a supportable basis, decide whether the corresponding amount belongs in PPE or inventory, and then keep the asset and provision moving together as estimates and discount rates change.
Start with the obligation, not the future payment date
Under the current Ind AS 37 text, a provision is recognised only when three conditions are met: there is a present legal or constructive obligation from a past event, an outflow of resources is probable, and the amount can be estimated reliably. A plan to dismantle an asset someday is therefore not enough by itself. The obligation must already exist because of a past event.
A legal obligation may come from legislation, a contract or another operation of law. A constructive obligation can arise from an entity's established conduct where that conduct has created a valid expectation that the entity will accept responsibility. The broader provision and contingent-liability recognition tests remain important here because an expected future cleanup cost is not automatically a recognised provision.
For a new asset, the obligating event can occur when the asset is acquired or installed if the entity already has to dismantle it or restore the site later. In other cases, the obligation builds because of how the asset is used. Identifying that event matters because it determines when the liability first appears and what the corresponding debit represents.
When the estimate forms part of PPE cost
Paragraph 16(c) of ICAI's current Ind AS 16 text includes in the cost of PPE the initial estimate of dismantling and removal costs and the cost of restoring the site, when the entity incurs the related obligation on acquisition or as a consequence of using the asset for purposes other than producing inventories during that period.
This is one reason a fixed-asset cost sheet should not stop at invoice price, freight and installation. The question of which costs form part of PPE can also require a long-dated restoration estimate even though no supplier has yet raised an invoice for that future work.
There is an important boundary. Ind AS 16 says that obligations for dismantling, removing and restoring that are incurred because the asset is used during a period to produce inventories are accounted for under Ind AS 2 for that period's inventory costs. The related liability is still recognised and measured under Ind AS 37. In other words, the same kind of restoration obligation can have a different debit depending on what created it.
Present value connects the asset and the provision on day one
Ind AS 37 requires the provision to be the best estimate of the expenditure needed to settle the present obligation at the reporting date. When the time value of money is material, the provision is measured at present value. The discount rate is pre-tax and reflects current market assessments of the time value of money and risks specific to the liability, but it must not double-count risks already built into the cash-flow estimate.
Hypothetical example: assume a company has a present restoration obligation when a plant is installed. The expected cash outflow after 10 years is ₹50 lakh. Assume, only for illustration, that an 8% pre-tax discount rate appropriately reflects the required market factors and that the time value of money is material. The present value is ₹50 lakh divided by 1.08 to the power of 10, which is approximately ₹23.16 lakh.
If the Ind AS 37 recognition conditions are met and the obligation is one that Ind AS 16 requires to be included in the asset's cost, the simplified initial accounting effect is:
- increase PPE cost by ₹23.16 lakh; and
- recognise a decommissioning or restoration provision of ₹23.16 lakh.
The 8% in this example is not a standard rate and should not be copied into a real valuation. A live calculation needs evidence for the expected timing and amount of the cash flows, the relevant risks, and the current pre-tax discount rate. Ind AS 37 also requires future events that may affect settlement cost to be included only when there is sufficient objective evidence that they will occur.
The liability grows even if the cleanup estimate does not change
A discounted liability moves towards its eventual settlement amount as time passes. That increase is the unwinding of the discount. Appendix A to Ind AS 16 requires the periodic unwinding to be recognised in profit or loss as a finance cost. It also states that capitalisation of that unwinding under Ind AS 23 is not permitted.
Using the same simplified example, one full year's unwinding at 8% would be about ₹1.85 lakh on the opening ₹23.16 lakh provision. If there were no other estimate changes during the year, the provision would therefore rise to about ₹25.01 lakh. The ₹1.85 lakh is a finance cost; it is not added back to the PPE cost.
This distinction helps avoid a common reconciliation problem. The asset balance is depreciated under Ind AS 16, while the discounted provision accretes through finance cost. The two balances will not remain equal after initial recognition, and they are not supposed to.
A revised estimate can change the asset as well as the liability
Later estimates rarely stay completely fixed. Expected dismantling cash flows may change, the expected settlement date may move, or the current market-based discount rate may change. Appendix A to Ind AS 16 gives specific accounting for those remeasurements.
For an asset carried under the cost model, a change in the decommissioning or restoration liability caused by a revised cash-flow estimate, timing estimate or discount rate is generally added to or deducted from the cost of the related asset in the current period. A reduction cannot reduce the asset below its carrying amount. If the liability decrease is larger than the asset's carrying amount, the excess is recognised immediately in profit or loss.
An upward adjustment to asset cost also needs an impairment check. Appendix A says the entity should consider whether the increase indicates that the new carrying amount may not be fully recoverable; if it does, the asset is tested under Ind AS 36.
The revaluation model is different. Changes in the liability interact with the revaluation surplus or deficit of the related asset, with amounts moving through other comprehensive income or profit and loss according to the existing revaluation position. The Appendix also says a liability change can indicate that a new revaluation is needed so that the asset's carrying amount does not differ materially from fair value. A company using the revaluation model should therefore not apply the cost-model entry mechanically.
Once the related asset has reached the end of its useful life, Appendix A requires subsequent changes in the liability to be recognised in profit or loss as they occur, under either model. At that stage there is no remaining depreciable asset amount to adjust for a revised estimate.
Do not mix three different movements in the year-end working
A useful decommissioning schedule separates the provision movement into causes rather than showing one unexplained closing adjustment:
- passage of time: the discount unwind, recognised as finance cost;
- revised cash flows or timing: a remeasurement of the obligation, with the related asset treatment determined by Appendix A; and
- change in discount rate: another remeasurement, again accounted for under Appendix A rather than treated as ordinary interest unwinding.
That separation matters because the three movements do not have the same accounting destination. It also makes the audit trail clearer: the engineer's revised cost estimate, management's timing assumptions and the finance team's discount-rate support can be traced to the exact movement they caused.
The year-end file should support both measurement and disclosure
Ind AS 37 requires provisions to be reviewed at each reporting date and adjusted to the current best estimate. For each class of provision, the disclosure movement includes the opening and closing carrying amount, additions, amounts used, unused amounts reversed, and the increase in the discounted amount arising from passage of time together with the effect of changes in the discount rate. The notes also describe the nature of the obligation, expected timing, material uncertainties and, where relevant, expected reimbursements.
For a material decommissioning or restoration provision, a finance team should be able to reconcile the following without rebuilding the calculation from scratch:
- the contract, law, licence condition or other evidence creating the present obligation;
- the date and event that caused the obligation to arise;
- the engineering or other support for expected dismantling and restoration cash flows;
- the expected settlement date or timing range;
- the discount-rate basis and evidence that risks were not counted twice;
- the opening provision, discount unwind, estimate changes, payments and closing provision;
- the corresponding PPE or inventory treatment and the effect on depreciation where relevant; and
- the financial-statement note and movement disclosure.
ICAI's 2025–26 Compendium of Indian Accounting Standards is a useful current index for the applicable Ind AS texts and amendments. For an actual transaction, the detailed conclusion should still be tied to the entity's own obligating event, asset model, cash-flow evidence and reporting-date assumptions.
The most useful control is to keep the fixed-asset register and the provision schedule connected. If the restoration estimate changes but only the liability schedule is updated, the asset side may be wrong. If finance capitalises an initial estimate without proving a present obligation, the starting point may be wrong. A defensible file shows why the obligation exists, how it was measured, where the corresponding debit belongs, and why each later movement went to PPE, other comprehensive income, profit or loss, or finance cost.
