Auditing Standard No. 5 introduced by the Public Company Accounting Oversight Board in June 2007 requires a top-down risk-based approach in auditing and is expected to improve audit efficiency and make the overall auditing process timelier by reducing audit report lags. We investigate the impact of AS5 on audit report lags over an extended period from 2006 to 2011 and find that audit report lags are lower in the AS5 years (2007–2011) relative to the AS2 years (2006–2007)