AP Photo/Don Ryan
Economists polled by Bloomberg are looking for services PMI to fall to 58.2, up from 55 the previous month. The flash reading came in at 58.4.
A reading below 50 indicates contraction.
The flash reading added to signs that the U.S. economy was regaining momentum, and followed a stronger manufacturing report.
Some better than expected economic data has brought back talk of an economic snapback.