Here is an interesting analysis of Vonage - the VoIP pioneer!The 5 Keys To Estimating NPV Customer NPV models generally have 5 key pieces of data. Below I have identified each piece of data and described what, if any data is available from Vonage.Net acquisition costs per customer. Acquisition costs are probably the most important part of an NPV model. In the S1, Vonage claims that its marketing cost per customer in Q3 05 was $209. This is a bit understated though because this figure does not include the costs associated with deploying customer premise equipment (ATAs) which appear as "Direct Cost of Goods Sold" in the financials. These costs in turn are somewhat offset by "Customer Equipment and Shipping" revenue. Including these additional figures results in a line acquisition cost of $233.24, which is further reduced to $203.25 by the activation fee of $29.99. The actual cost is probably a bit higher because Vonage accounts for cash incentives and rebates as a contra against revenue, but these costs don't appear to be highly significant right now so I am going to go with a $203.25 cost in my model. Read more