What Percent of Under Contract Deals Fall Through?

[Randall Wall]

So we close a lot of transactions as investors and agents. But every so often the deal falls through due to financing, appraisal, due diligence, or some other reason that comes up. Sometimes its friends or family members of the seller that want the property at the price we are paying once they hear about it.

One guy on Trulia said 15-25% but that seems pretty high another said 10-15% which seems more reasonable.

What is your experience?