ASC 930
Active
ASC 930 – Extractive Activities–Mining
Governs exploration and evaluation costs, stripping costs, and asset retirement obligations for mining operations.
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Conceptual Framework Linkage
Extractive costs pose a genuinely different capitalization question
Mining involves substantial up-front EXPLORATION spending long before it's known whether a commercially viable ore body even exists, followed by ongoing STRIPPING (waste removal) costs during production that provide improved future access to ore. ASC 930 addresses when these COSTS should be CAPITALISED as assets versus expensed, and how stripping costs specifically should be treated once production has begun.
IFRS 6 is a deliberately unusual, narrow standard
IFRS 6 (Exploration for and Evaluation of Mineral Resources) is famous for its deliberately NARROW, PERMISSIVE approach – rather than mandating a specific accounting policy, it largely allows entities to CONTINUE applying their EXISTING accounting policies for exploration and evaluation costs. ASC 930 takes a more CONVENTIONAL approach, requiring costs to meet normal asset recognition criteria (Section 4).
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Scope
Mining exploration, development, and production entities
ASC 930 applies to entities engaged in the exploration, development, and production of MINERALS (metals, coal, industrial minerals) – excluding oil and gas, which is separately addressed by ASC 932.
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Exploration and Evaluation Costs – Capitalization Criteria
Capitalised where directly attributable to a specific mineral property with probable future benefit
Costs DIRECTLY attributable to FINDING and EVALUATING specific mineral properties – geological surveys, exploratory drilling, sample analysis – are CAPITALISED as an asset if it is PROBABLE they will provide FUTURE ECONOMIC BENEFIT (i.e. lead to an economically viable ore body); costs incurred before a specific property is identified, or where NO future benefit is probable, are EXPENSED as incurred. This reflects normal GAAP asset-recognition principles, applied contextually to the mining exploration setting.
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THE KEY DIVERGENCE – IFRS 6's Unusual "Grandfather Existing Policy" Approach
A deliberately non-prescriptive standard, unlike anything on the US GAAP side
IFRS 6 takes a genuinely UNUSUAL regulatory approach: rather than PRESCRIBING a specific method for exploration and evaluation (E&E) cost accounting, it largely permits an entity to CONTINUE applying whatever accounting policy it was ALREADY using immediately before adopting IFRS 6 – effectively "GRANDFATHERING" pre-existing diverse practice, subject only to some baseline consistency and impairment-indicator requirements. This was a deliberate, TEMPORARY compromise by the IASB, reflecting the difficulty of achieving international consensus on E&E accounting given widely varying pre-existing national practices. ASC 930 has NO equivalent "grandfather your existing policy" mechanism – US GAAP requires E&E costs to meet NORMAL asset recognition criteria (Section 3) consistently, without the same policy-continuation allowance IFRS 6 provides. This is a genuinely unusual, STRUCTURAL divergence – not a difference in specific rules, but a difference in whether a codified, CONSISTENT capitalisation policy is required AT ALL.
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Stripping Costs During the Production Phase
Capitalised as a "stripping activity asset" where improved access provides future benefit
STRIPPING costs (removing waste/overburden material to access ore) incurred DURING the production phase are CAPITALISED if they create a PROBABLE future economic benefit in the form of IMPROVED ACCESS to the ore body – amortised over the RESERVES benefited by the specific stripping campaign, rather than expensed as a period production cost. This closely mirrors IFRIC 20's OWN "stripping activity asset" concept (also requiring capitalisation of stripping costs providing improved access, to the extent the benefit is realised as inventory) – a genuinely CONVERGED area, since IFRIC 20 was informed by pre-existing industry practice similar to that already used under US GAAP.
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Asset Retirement Obligations (Reclamation)
Governed by the general ASC 410 framework
Legal obligations to RECLAIM mined land (restore the site to a required post-mining condition) are recognised as ASSET RETIREMENT OBLIGATIONS under the GENERAL ASC 410 framework – recognised at fair value when the obligation is incurred, with a corresponding increase to the related asset's carrying amount, accreted over time and depreciated alongside the asset.
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Impairment of Mining Assets
Normal long-lived asset impairment principles apply
Capitalised mining assets (including stripping activity assets and E&E costs) are tested for impairment under the GENERAL long-lived asset impairment framework (ASC 360) – a two-step test comparing UNDISCOUNTED expected future cash flows to carrying amount, then measuring any impairment loss based on FAIR VALUE if the undiscounted test fails, with NO industry-specific formulaic "ceiling test" of the kind used in oil and gas accounting (ASC 932).
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Worked Example – Stripping Cost Capitalization
Capitalising costs that improve future access
Example: An open-pit mine's deep stripping campaign
A mining company incurs $12,000,000 of stripping costs to access a NEW, deeper ore zone that will be mined over the following 4 years, well beyond the immediate benefit of current-period ore extraction.
Since the stripping activity provides IMPROVED ACCESS to a SPECIFIC, IDENTIFIABLE future ore zone (rather than merely sustaining current-period production), the $12,000,000 is CAPITALISED as a stripping activity asset, and AMORTISED over the 4-year period the newly accessed ore zone is expected to be mined – rather than expensed immediately as a current production cost.
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Worked Example – Exploration Cost Capitalization
A specific property with probable future benefit
Example: Drilling costs on an identified claim
A company incurs $3,000,000 of exploratory drilling costs on a SPECIFIC, staked mineral claim, with preliminary results indicating a probable economically viable deposit.
Since the costs are DIRECTLY attributable to a SPECIFIC, identified property, and future economic benefit is deemed PROBABLE based on preliminary results, the $3,000,000 is CAPITALISED as an exploration and evaluation asset – to be further evaluated for eventual reclassification to development/production assets, or for impairment if subsequent results prove unfavourable.
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Disclosure Requirements
What ASC 930 requires
Accounting policy for exploration and evaluation cost capitalisationStripping activity assets recognised, and the amortisation methodology appliedMineral reserve estimates, generally required under SEC S-K 1300 modernised reserve reporting rules for public mining registrants
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Critical Judgments & Estimates
Where judgement matters most
SIGNIFICANT JUDGEMENTS
Whether future economic benefit from exploration costs is probable, warranting capitalisationWhether stripping costs provide genuine improved future access versus merely sustaining current production
SIGNIFICANT ESTIMATES
Mineral reserve quantities, underlying depletion and amortisation calculationsReclamation/asset retirement obligation cost estimates and discount rates
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ASC 930 vs IFRS 6 / IFRIC 20 – Comprehensive Comparison
Comparison – ASC 930 vs IFRS 6 / IFRIC 20
FeatureUS GAAP (ASC 930)IFRS (IFRS 6 / IFRIC 20)
E&E cost accounting policyMust meet normal, consistent asset recognition criteriaIFRS 6 permits CONTINUING pre-existing accounting policy – a genuinely unusual "grandfather" allowance
Stripping cost capitalisationCapitalised as a stripping activity asset if improved future access is probableIFRIC 20's stripping activity asset – broadly converged concept
Impairment testingNormal ASC 360 two-step long-lived asset testIAS 36 recoverable amount (higher of fair value less costs to sell and value in use) – a different mechanical test, though broadly similar in spirit
The stripping cost treatment is genuinely CONVERGED – but the E&E cost POLICY-CONTINUATION allowance under IFRS 6 remains a structurally unusual divergence, reflecting IFRS 6's origin as a deliberately temporary, non-prescriptive compromise standard.
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Statement Mapping
Where every ASC 930 event lands
EventStatement(s) affectedNotes
Capitalised exploration costsBSRecognised as an asset if future benefit is probable
Stripping activity assetBS ISCapitalised, then amortised over benefited reserves
Reclamation AROBSRecognised at fair value with a corresponding asset increase
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Related Topics
Cross-reference map
TopicConnection
ASC 410Supplies the general asset retirement obligation framework applied to reclamation liabilities
ASC 360Supplies the general long-lived asset impairment framework applied to mining assets
ASC 932Extractive Activities–Oil and Gas – a related industry Topic with its own distinctive capitalisation methods
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Quick-Reference Glossary
Stripping activity asset
An asset capitalised for production-phase waste removal costs that provide probable improved future access to an identifiable ore body.
Exploration and evaluation (E&E) costs
Costs of finding and evaluating specific mineral properties, capitalised when future economic benefit is probable.
Reclamation
The legal obligation to restore mined land to a required post-mining condition, accounted for as an asset retirement obligation.
Financial statement key
BS Balance sheet
IS Income statement
SE Statement of changes in equity
OCI Other comprehensive income
SCF Statement of cash flows