Purpose Existing studies have shown that all kinds of audit risks greatly affect audit pricing for accounting firms. However, it is still unclear whether environmental risks caused by environmental violations lead to a high audit fee. This study aims to investigate whether accounting firms raise audit fees after client firms have violated environmental regulations or have been punished for such violations. Design/methodology/approach This study selects listed firms with environmental violations between 1994 and 2018 as the treatment sample and match the treatment group with a control group of firms from the same industry, of similar asset size and with no environmental violations for the same time period. Then, this study constructs a difference-in-difference (DID) model to explore the impact of firm environmental violations (or punishment for environmental violations) on the audit pricing. Findings This study finds that accounting firms tend to raise audit fees after client firms have violated environmental regulations or have been punished for such violations, and this increasing effect is different due to environmental regulation intensity, regional span and internal control defects. Further evidences show that environmental violations influence audit fees through financial restatement, whereas environmental punishments impact audit fees through earnings management and risk-taking. Originality/value This study enriches the literature on determining factors of audit fees and economic consequences of environmental violations and provides empirical supports to understand the pricing behavior of accounting firms.
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