The Nikkei India Services Purchasing Managers' Index, which tracks services sector companies on a monthly basis, stood at 52 in September, down from August's 43-month high of 54.7, pointing to a slower and moderate rate of expansion.
The subdued labour market is likely to recover.
Manufacturing production growth eased in May, which combined with the slowdown in services resulted in a weaker increase in private sector output, the survey said.
Strong new business growth was the primary factor.
On the employment front, services employment was unchanged in April.
The Nikkei India Services Purchasing Managers' Index, which tracks the services sector firms on a monthly basis, stood at 50.3 in February, up from 48.7 registered in January.
The Nikkei India Manufacturing PMI dipped from 50.3 in November to 49.1 in December.
Input prices rose at their fastest rate in 14 months but manufacturers absorbed much of the increase
Firms hired additional hands to keep up with the production demand
A reading above 50 means the sector is expanding, while a reading below 50 means contraction.
The index went below the crucial 50 mark.
A reading above 50 indicates expansion, while a score below this mark means contraction
The NITI Aayog's vice-chairman's charge holds ground.
The mismatch between PMI and core sector could also be due to the fact that while core sector is calculated year-on-year, PMI is calculated month-on-month.