Nearly one in five (18%) prospective first-time homebuyers said extending the $8,000 tax credit would be the primary influence on their decision to buy a home before the end of 2010, according to a Zillow survey. That would equate to 334,000 buyers from Dec. 1, 2009 to Nov. 30, 2010, a likely time period for an extension, according to additional analysis. Zillow queried adults who qualify as a first-time homebuyer, asking them if an extension of the tax credit would influence their plans to buy a home before the end of 2010. If the credit were extended, of those who intend to buy a home, 18 percent called the credit the "primary influence" in their decision, 25 percent said it would be a "significant influence," and 27 percent said the credit would have "some" influence on any home buying decision. Thirty-one percent said it would have no influence on their decision. Zillow analysis of current market trends shows that, if the credit were extended, a total 1.86 million first-time homebuyers would purchase homes between Dec. 1, 2009 and Nov. 30, 2010. If all could take advantage of the full $8,000 tax credit, this could mean up to $14.86 billion in tax credits.