China Accounting Standards, known as CAS, are the mandatory financial reporting framework that every business registered in mainland China must use to prepare its statutory books. The Ministry of Finance rebuilt the system in 2006 by issuing a new Basic Standard and 38 specific standards designed to bring Chinese reporting substantially in line with International Financial Reporting Standards.1IAS Plus. China Adopts 38 New Accounting Standards Convergence has continued since then, but CAS is not IFRS. Real differences remain, particularly around fair value, impairment reversal, common-control mergers, and related-party disclosure, and companies operating across borders still have to reconcile the two.
What the CAS Framework Contains
The main body of CAS is officially called the Accounting Standards for Business Enterprises, or ASBEs. At the top sits the Basic Standard, which sets out the objectives of financial statements and defines assets, liabilities, equity, revenue, and expenses. Every specific rule flows from those foundations.
Below the Basic Standard are dozens of specific standards. The 2006 reform produced 38, covering revenue recognition, fixed assets, financial instruments, insurance contracts, and much more.2ScienceDirect. The Impact of the New Accounting Standards for Business Enterprises (ASBE) on Financial Results of Mainland Chinese Listed Companies The MOF has revised several and added new ones since, and numbered interpretations sit alongside the standards to clarify how they apply to specific fact patterns.
A separate simplified framework exists for smaller companies: the Accounting Standards for Small Business Enterprises (ASSBEs). The ASSBEs cut back the disclosures and offer practical shortcuts, so regulators can demand rigorous reporting from large and listed companies without burdening small firms with paperwork they do not need.
Who Has to Report Under CAS
Every enterprise registered in mainland China prepares its statutory financial statements under CAS. Which tier applies depends on size and public accountability.
- A-share listed companies on the Shanghai and Shenzhen exchanges must use the full ASBEs. This has been mandatory since January 1, 2007.1IAS Plus. China Adopts 38 New Accounting Standards
- Large state-owned enterprises and major unlisted companies generally follow the full ASBE framework as well.
- Foreign-invested enterprises, including wholly foreign-owned entities and joint ventures, must file their Chinese statutory statements under ASBEs. They can keep a parallel set of IFRS or US GAAP books for group consolidation with an overseas parent, but the statutory filing in China follows CAS.
- Small and micro-sized enterprises that fall below the public-accountability threshold can adopt the streamlined ASSBEs.
Statutory statements have to be denominated in Renminbi and follow the calendar year, ending December 31. A company incorporated partway through a year files initial statements running from incorporation through year-end.
Reporting Deadlines
The fiscal year is fixed. Every entity runs from January 1 to December 31, with no option to pick a different year-end. Once the year closes, several deadlines kick in.
Before any tax filing, a company must complete a statutory annual audit performed by a licensed Chinese CPA firm. The corporate income tax annual reconciliation is due by May 31, when the company reconciles its provisional payments against audited full-year profit. Annual reports then go to multiple government bodies, including the State Administration for Market Regulation and, for foreign-invested entities, the Ministry of Commerce and the State Administration of Foreign Exchange, with a general deadline of June 30.
Listed companies face a tighter clock. A-share issuers have to publish audited annual reports within four months of year-end, so the effective cutoff falls around the end of April. Missing these deadlines can trigger trading suspensions and CSRC scrutiny.
How CAS Differs From IFRS
Years of convergence have narrowed the gap, but the remaining differences are real and tend to reflect a more conservative Chinese philosophy: historical cost over fair value, restricted earnings volatility, and heavier disclosure of related-party dealings. Anyone comparing a Chinese company’s CAS numbers to an IFRS-reporting peer needs to know where these two frameworks part ways.
Fair Value and Asset Valuation
IFRS lets companies choose between historical cost and a revaluation model for property, plant, and equipment, adjusting the carrying amount to fair value at intervals.3IFRS Foundation. International Accounting Standard 16 Property, Plant and Equipment Under ASBEs, that choice is mostly gone. Companies generally have to use historical cost for PP&E, with revaluation available only in narrow circumstances.
The same conservatism applies to investment properties. IFRS allows either a cost model or a fair value model for buildings and land held to earn rent. CAS generally requires the cost model, so investment property on a Chinese balance sheet may lag market reality. Earnings are less volatile as a result, and the balance sheet is less transparent about current market values.
Impairment of Long-Lived Assets
This is one of the sharpest differences between the two frameworks. Under IFRS, an impairment loss on a long-lived asset can be reversed in a later period if conditions improve. Goodwill is the exception: once impaired under IFRS, it stays impaired.4IFRS Foundation. International Accounting Standard 36 Impairment of Assets
CAS goes further. Under ASBE No. 8, once an impairment loss is recognized on any long-lived asset, it cannot be reversed in future periods.5Asian Legal Information Institute. Accounting Standard for Business Enterprises No. 8 – Impairment of Assets The rule covers PP&E, intangible assets, goodwill, and long-term equity investments alike, and it exists partly to stop companies from manufacturing earnings recoveries by selectively reversing prior write-downs. For a reader looking at CAS financials, this means assets may sit at permanently depressed values even after the conditions that caused the impairment have passed.
Business Combinations Under Common Control
When two companies with the same parent merge, CAS requires the pooling-of-interests method: assets and liabilities carry forward at existing book values, with no revaluation. IFRS has no specific standard for combinations under common control, leaving companies to build their own policies. The difference matters most in China’s state-owned sector, where restructurings among SOEs under the same government parent are common.
Related Party Disclosures
CAS demands more granular related-party disclosure than IFRS. The Chinese definition of a related party can pull in a wider circle of connected entities and individuals, and companies must detail the nature, volume, and pricing of transactions at a level that often exceeds IFRS. The extra scrutiny reflects longstanding regulatory concern about non-arm’s-length dealings, particularly within large SOE groups.
Inventory and Revenue
On some issues the two frameworks have closed the gap. LIFO was abolished when the ASBEs were reformed in 2006, mirroring the prohibition under IAS 2, so Chinese companies use FIFO, weighted-average, or specific identification. Revenue recognition also lines up: CAS 14, issued in 2017 and effective for all CAS entities from January 1, 2021, adopts the same five-step model as IFRS 15, with only minor differences in application guidance.
Who Enforces the Rules
Three bodies share responsibility for the CAS system.
The Ministry of Finance is the standard-setter. Under China’s Accounting Law, the finance department of the State Council has authority over accounting work nationwide and issues the country’s unified accounting system.6National People’s Congress of the People’s Republic of China. Accounting Law of the People’s Republic of China The MOF drafts and maintains the Basic Standard, the specific ASBEs, the ASSBEs, and the numbered interpretations, and issues implementation Q&As and application examples.
The China Securities Regulatory Commission handles enforcement for publicly traded companies. As the centralized securities regulator, the CSRC supervises the financial reporting quality of A-share issuers and can investigate misstatements.7China Securities Regulatory Commission. Law of the People’s Republic of China on Securities The revised Accounting Law increased maximum fines for fraudulent financial reporting to as much as ten times any illegal income, a significant escalation from prior caps, and the CSRC has publicly adopted a “zero tolerance” posture toward securities fraud.
The Chinese Institute of Certified Public Accountants sets professional standards for auditing and assurance work and oversees the quality of audits performed on CAS-compliant financial statements.8International Federation of Accountants. About the Chinese Institute of Certified Public Accountants
Ongoing Convergence With IFRS
The 2006 reform was a starting point. Several major standards adopted since then track their IFRS equivalents closely:
- CAS 14 (Revenue, revised 2017) mirrors IFRS 15’s five-step model.
- CAS 21 (Leases, revised 2018) follows IFRS 16 in requiring lessees to bring most leases onto the balance sheet.
- CAS 22 to 24 (Financial Instruments, revised 2017) align with IFRS 9 on classification, measurement, and hedge accounting.
- CAS 25 (Insurance Contracts, 2020) tracks IFRS 17 and took effect from January 1, 2023.
These standards became effective for all CAS-reporting entities from January 1, 2021, with CAS 25 following in 2023, bringing smaller unlisted companies into line with rules that listed entities had already adopted. The MOF has also maintained continuous convergence between mainland Chinese standards and Hong Kong Financial Reporting Standards, which supports cross-border capital flows and dual listings.9Ministry of Finance of the People’s Republic of China. Accounting Standards of Chinese Mainland and HKSAR Maintain Continuous Convergence in 2024
Full convergence is a policy goal, not a present reality. The gaps around fair value, impairment reversal, and common-control combinations reflect deliberate choices tied to China’s economic structure and regulatory philosophy, and companies operating across borders still need careful reconciliation work and, in many cases, parallel sets of books.