The NYSE-listed firm had posted a net profit of USD 12.2 million in the year-ago period, it said in a statement.
Consolidated revenue rose 7 per cent at USD 136 million in October-December this fiscal from USD 127.1 million in the same quarter of 2013-14. The figures are on GAAP basis.
WNS also said that it would repurchase up to 1.1 million shares, which would cost the firm up to USD 33 million.
The demand environment for BPM (Business Process Management) services remains stable and healthy, as WNS continues to deliver solid financial and operating results, he added.
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In a separate statement, WNS said: "Board of Directors has authorised a programme to repurchase up to 1.1 million American Depositary Shares (ADSs), each representing one ordinary share, at a price range of USD 10-30 per ADS."
"If shareholders approve the repurchase programme, ADSs may be purchased in the open market from time to time over the next 12 months from April 1, 2015," WNS said.
WNS also updated its guidance for the 2014-15 fiscal.
"Our revised guidance for the year reflects top line growth of 6.5-7.1 per cent, with over 99 per cent visibility to the midpoint of the range. This guidance represents 5-6 per cent revenue growth on a constant currency basis," WNS CFO Sanjay Puria said.
The firm added five new clients in the third quarter and expanded four existing relationships. Its total headcount stood at 27,755 as of December 31, 2014.
Moving forward, investments in areas of domain expertise, automation and new service offerings will be essential to meeting the evolving client needs, Murugesh said.
"We believe these investments will allow us to enhance our differentiated market position, and enable WNS to grow revenue and maintain profit margins at or above industry levels," he added.