PurposeThis study aims to examine the levels of interim financial reporting (IR) disclosure by listed firms in the Asia-Pacific region and factors influencing these disclosure levels.Design/methodology/approachDrawing on a sample of 700 interim reports issued in 2012 by the top 100 listed firms in seven Asia-Pacific countries (Australia, Hong Kong, Malaysia, Singapore, the Philippines, Thailand and Vietnam), the author constructed a disclosure index consisting of disclosure items commonly required across the sample countries. Using this index, the study measures the extent to which listed firms in the Asia-Pacific Region comply with IR disclosure requirements. The study performs ordinary least square regression to investigate the influence of the four country-level factors including international financial reporting standard (IFRS) adoption, audit review, reporting frequency and reporting lag.FindingsThis research documents that IR disclosure varies significantly across the region. The IR disclosure levels are positively associated with IFRS adoption, audit review and mandatory of quarterly reporting, but negatively associated with reporting lag.Originality/valueIR regulation varies across the Asia-Pacific region, but there is no existing research on the country-level factors influencing IR disclosure practices. To the best of the author’s knowledge, this is the first paper providing some insights into IR disclosure levels by listed firms in the region. It also contributes to the disclosure literature by providing empirical evidence on the country-level factors influencing these disclosure levels. Deriving from the findings, the authors offer recommendations for regulators, investors and listed firms on the issue of reviewing the regulation, using information and preparing IR.