Nicholas Ian Macpherson, Baron Macpherson of Earl's Court, GCB (born 14 July 1959) is a former senior British civil servant. He served as the Permanent Secretary to the Treasury from 2005 to 2016. Macpherson was Permanent Secretary to three Chancellors. He managed the department through the financial and wider economic crisis which began in 2007. Macpherson was nominated for a crossbench peerage in David Cameron's 2016 resignation Honours, and joined the House of Lords on 4 October 2016.