In the three months to August 2018, services output increased by 0.5% compared with the three months ending May 2018.
The wholesale, retail and motor trade sector made the largest contribution to the three-month on three-month growth for the fourth consecutive month, contributing 0.21 percentage points.
The Index of Services was flat between July 2018 and August 2018.
Month-on-month growth in the information and communication sector was partially offset by a fall in accommodation and food services.
In the three months to August 2018, services output increased by 1.6% compared with the three months ending August 2017.