In this note, we discuss the Czech National Bank’s experience with the one-sided exchange rate commitment it applied from November 2013 to April 2017 as an additional monetary policy instrument to ease monetary conditions. We describe the CNB’s operations in the foreign exchange market and developments in the Czech government bond and money markets in relation to the commitment. The CNB’s experience with its temporary exchange rate commitment and with the subsequent exit serves as a case study of a successful policy measure in a small open inflation targeting economy facing a severe risk of deflation and zero monetary policy interest rates.