Posting below the no-change mark of 50.0 in November, the seasonally adjusted Business Activity Index signalled a contraction of the service sector for the first time in three months.
In PMI lexicon, a print above 50 means expansion and a score below that denotes contraction.
"Business under performance emanated from July's Goods and Services Tax (GST) which contributed to sluggish demand and lower customer turnout, according to anecdotal evidence," said Aashna Dodhia Economist at IHS Markit and author of the report.
The latest services PMI follows the manufacturing one announced December 1, which showed that robust growth in manufacturing sector during November.
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Accordingly, the Nikkei Composite Output Index, that maps both the manufacturing and services activity fell from 51.3 in October to a three-month low of 50.3 in November, signalling a broad stagnation in private sector output in India.
On the prices front, input cost inflation quickened to the fastest since October 2013 and accordingly service providers increased their average selling prices in November.
India Inc, however, is demanding interest rate cut to further build on positive sentiment generated by the rebound and upgrade of the country's sovereign rating by Moody's.
In its October review, it had kept the benchmark interest rate unchanged on fears of rising inflation while lowering growth forecast to 6.7 per cent for the current fiscal.
The central bank had reduced the benchmark lending rate by 0.25 percentage points to 6 per cent in August, bringing it to a 6-year low.