The Internal Revenue Service (IRS) recently introduced tax code revisions requiring stricter oversight of community benefit activities (CBAs) conducted by tax-exempt, not-for-profit hospitals. We examine the impact of this tax requirement on CBAs among these hospitals relative to for-profit and government hospitals that were not subject to the new policy. We employed a quasi-experimental, difference-in-difference study design using a longitudinal observational approach and used secondary data collected by the American Hospital Association (years 2006-2010 including 20,538 hospital year observations). Findings show a significant increase in the reporting of 7 of the 13 CBAs among tax-exempt, not-for-profit hospitals compared with other hospitals after the policy change. Examples include partnering to conduct community health assessments ( b = 0.035, p = .002) and using capacity assessments to identify unmet community health needs ( b = 0.041, p = .001). Recent tax revisions are associated with increases in reported CBAs among tax-exempt, not-for-profit hospitals. As the debate continues regarding tax exemption status for not-for-profit hospitals, policy makers should expand efforts for enhanced accountability.