Preaching austerity is easy, but the European Central Bank(ECB) has found that it can be difficult to put the virtue in the practice.

Austrian architect Wolf Prix of CooP Himmelblau gestures during a media tour of the the new European Central Bank (ECB) headquarters on September 20, 2012 in Frankfurt, Germany. The new, twin-tower headquarters is scheduled for completion by 2014.

The ECB on Thursday announced a significant overrun in the cost of its new headquarters, due for completion in 2014. A series of mishaps—an inconclusive tender process and a failure to identify structural problems in the new site—has pushed the final bill to as much as 1.2 billion euros ($ 1.56 billion), up from an original estimate of 850 million euros.