Shares of Google, the world's No 1 Internet search engine, were essentially flat at $1136.94 in after hours trading on Thursday.
Google's consolidated revenue, which includes the money-losing Motorola smartphone business, rose to $16.86 billion from $14.42 billion in the fourth quarter of 2012. Analysts polled by Thomson Reuters I/B/E/S were looking for $16.75 billion.
Paid clicks on Google's online ads jumped 31 percent year-on-year, but the average cost per click that marketers paid Google declined 11 percent.
Revenue in Google's core Internet business totaled $15.7 billion in the last three months of the year, up 22 per cent from the $12.91 billion in the year-ago period.
Google's consolidated net income was $3.38 billion, or $9.90 per share, compared to $2.89 billion, or $8.62 per share, in the year-ago period. Excluding certain items, Google said it earned $12.01 per share.