Early last year Italian tax police presented a claim against Google for the non-payment of taxes between 2009 and 2013 to the tune of 227 million euros.

One of the sticking points to reaching a final settlement with the U.S. giant is a commitment from Google to pay taxes in Italy in the future, the source said.

"Google is continuing to work with the competent authorities," a Google spokeswoman said.

(This version of the story corrects second paragraph to read "early last year" instead of "earlier this year")

(Reporting by Emilio Parodi, writing by Stephen Jewkes)