Normative synergy: the impact of ISO certifications on companies’ financial performance

Purpose This study examines the impact of adherence to ISO 9001, ISO 14001, and ISO 45001 on the financial performance of publicly traded Brazilian companies from 2014 to 2023. Design/methodology/approach Panel regressions were estimated using firm-year data and two IMS operationalizations: A binary measure of full integration and a continuous measure of partial integration. Financial performance was measured by operational ROA and net ROA. The models include financial, operational, and sector controls, use random effects supported by Hausman tests, and included one-period-lagged specifications. Findings Results show a positive and statistically significant association between ISO integration and financial performance, with stronger coefficients for partial integration and partial persistence in lagged models. Practical implications Publicly traded companies may improve financial performance by consistently integrating ISO certifications, promoting efficiency, coordination, better resource utilization, reduced redundant costs, and lower regulatory and operational risks. The degree of integration matters, as integrated arrangements may generate stronger gains than fragmented adoption. Social implications ISO integration is associated with organizational legitimacy, a socially and environmentally responsible image, safer and more sustainable work environments, and potential effects on employer branding, talent retention, and employee satisfaction. Originality/value This study shows that ISO certification–financial performance relationships vary by the degree of integration and remain consistent across alternative performance measures and lagged specifications.