"The economy is growing, and growing well and is forecast to grow three times faster than the German economy. Our economy is on track," Cameron told an audience of top businessmen at the Confederation of British Industry's (CBI) annual conference held in central London.
The state of the British economy and how to stimulate it dominated the speeches at the conference.
Cameron said prioritizing infrastructure building was one of the main pillars of his government's strategy for growth.
Cameron has personally championed a planned high-speed rail line, dubbed HS2, similar to those built in recent years in China, which will link London with major cities in the English Midlands and the North.
Permission for the line has yet to be granted but the final projected cost of HS2 has already risen from 33 billion pounds (about 52.6 billion U.S. dollars) to 50 billion pounds.