The General Services Administration is freezing federal travel per diem rates for fiscal year 2013, the agency announced Tuesday.

The agency predicts freezing per diem rates at 2012 levels will save an estimated $20 million in avoided costs, according to an agency statement. The freeze will go into effect Oct. 1, the beginning of the federal fiscal year.

In May, the Office of Management and Budget issued a government-wide memorandum ordering agencies to cut travel spending by 30 percent below fiscal year 2010 numbers.

“GSA is undergoing a rigorous review process to find ways in which we can streamline agency operations and save money across the government,” said Acting Administrator Daniel Tangherlini. ”By keeping per diem rates at current levels, we are supporting federal agencies in controlling costs and ensuring that taxpayer dollars are used wisely.”