Markit Economics will release its flash US services purchasing manager's index (PMI) at 9:45 a.m. ET.
Economists estimate that the index rose to 51.4 in March, after a slowdown to 49.7 in February.
Although Markit's index dipped into contractionary territory - below 50 - ISM's gauge of the sector has held above that mark.
But both showed that the services sector, which accounts for most of US economic output, had a sluggish start to the year.
We'll have the latest once the data cross, so refresh this page for updates.