Public procurement contracts worldwide often face high risks of cost overruns and project delays, raising questions about the scope for contract modifications. This column examines the impact of eased renegotiation rules on procurement outcomes in the Czech Republic between 2015 and 2020. Easing renegotiation rules did not substantially change procurement outcomes but led to a sharp increase in renegotiations and lower winning bid values, as firms anticipated adjustments from renegotiation. A