CAS vs IFRS: The Gaps That Actually Move Your Consolidation

Chinese Accounting Standards for Business Enterprises (CAS) have been substantially converged with IFRS since 2006, with further amendments bringing them closer on revenue, leases, financial instruments, and fair value measurement. When I convert a Chinese subsidiary's reporting package for a foreign parent, most lines reconcile without adjustment.

The areas that need attention are a small number of places where CAS made a different policy choice — and those tend to be the ones carrying the most value.

The three that matter most

Area	CAS position	IFRS position	Effect on consolidation
Common control combinations	Pooling of interests is required (carrying amounts continue)	Outside IFRS 3; practice uses predecessor values by analogy	Usually reconciles, but equity presentation and transaction costs differ
Impairment reversal	Prohibited for most long-lived assets once recognised	Permitted for assets other than goodwill	Earnings differ in shape: a write-down is not reversed, so recovery appears only through lower depreciation
Related party disclosure	Broad definition, no state-entity exemption	IAS 24 partial exemption for state-controlled entities	Chinese packages generally disclose more, not less — but the two lists are not always identical

Common control combinations deserve a separate conversation

This is the single most common source of confusion in China group audits. When a Chinese group restructures entities under common control, CAS requires the receiving entity to record the acquired business at the predecessor's carrying amounts and to restate comparatives as if the combination had always existed. The result looks like a merger, not an acquisition.

IFRS 3 explicitly scopes out combinations of entities under common control, and IFRS does not prescribe an accounting treatment. In practice, groups apply a predecessor-value approach by analogy — which lands in a similar place, but not the same place. The differences that surface are usually in:

• how transaction costs are treated,
• whether comparatives are restated or the combination is reflected prospectively, and
• how the resulting equity is presented in the group's consolidated statement of changes in equity.

Impairment reversal changes the shape of earnings

Under CAS, once an impairment loss is recognised on fixed assets, intangible assets, or long-term equity investments, it cannot be reversed. Under IAS 36, it can be — for everything except goodwill.

In a cyclical Chinese manufacturer, this produces a permanent difference: a bad year is written down and never written back, so the recovery shows up only through future depreciation being lower. If you are comparing a Chinese target with an overseas peer on EBITDA or on asset turnover, you are comparing two different earnings shapes.

Practical conversion checklist

1. Obtain the subsidiary's CAS-to-IFRS adjustment schedule and the underlying workings — not just the summary.
2. Confirm whether any common control combination occurred in the period, and how comparatives were treated.
3. Check whether any impairment was recognised historically on long-lived assets, and whether IFRS would permit reversal.
4. Reconcile related party lists between the Chinese package and the group's own list; expect them to differ.

The conversion itself is rarely the hard part. Knowing which differences are worth quantifying is.

This article summarises general differences between Chinese Accounting Standards and IFRS as I encounter them in practice. It is not a substitute for the standards themselves and is not accounting advice for a specific entity. Views are my own and do not represent any firm.