Following the withdrawal of IFRIC 3: Emissions Rights in 2005, European Union (EU) companies participating in an Emissions Trading Scheme (ETS) do not have definitive guidelines as to how to account for carbon emissions allowances. Using a content analysis methodology, this study examines the disclosed accounting policies of companies participating in the EU ETS, and reveals how, in the absence of clear guidance, they account for their carbon emissions allowances. As the accounting method adopted will impact upon a company's financial statements, these findings are of interest to accounting standards setters, investors, financial reporting preparers, auditors, and researchers.