The manufacturing sector also saw its growth rate coming down in the last month, as per another HSBC survey released earlier this week, which coupled with a moderate inflation may convince the Reserve Bank to cut its policy rate for the third time this year.
RBI will hold its next monetary policy review on June 2, although the earlier two rate cuts -- first in January and then in March -- were effected outside the scheduled meetings.
The HSBC India Services Business Activity Index, which tracks changes in activity at the service companies, fell to a three-month low of 52.4 in April from 53.0 recored in March.
A score above 50 indicates that the sector is expanding, while a figure below that level means contraction.
"The slowdown in the Indian service sector continued in April with weaker activity growth reflecting softer demand conditions," Markit Economist Pollyanna De Lima said.
"Accompanying the subdued outlook in the opening month of the fiscal year, was a return to job shedding as companies maintained a cost-cautious approach," Lima added.
On the positive side, the confidence among services companies regarding the one-year outlook for activity improved, indicating that firms are optimistic that the current deceleration in growth is a temporary soft patch.
The slower rise in service sector activity was matched by a softer increase in manufacturing production. As a result, the headline HSBC India Composite PMI Output Index fell from 53.2 in March to a six-month low of 52.5 in April, HSBC said.
"Inflation rates for both input and output prices were weak by historical standards, providing the RBI with more scope for further rate cuts," Lima said.
Lima further added that an expansionary approach to monetary policy would, at a time when the economy is losing traction, provides much needed support for further growth.
