Valuation of High Growth Start-ups

A graduate student from Norway e-mailed me about how high-potential businesses are valued during seed financing, since there is nothing really to base a valuation on — no sales and no cash flow. He suggested that any valuation seemed like holding a wet finger up to measure wind speed. The truth is, valuing a business during seed round is more like assessing wind speed by holding up dry finger in the air!
They answer to his question is this: they don’t really even try to value the business.
The most common approach these days for seed financing is to use a convertible promissory note. It really delays any need to value the business until there is clearer information to use for valuation. It is convertible at the time that Series A money comes in, usually from VCs, at some multiple over the share value at the time Series A money is secured. Series A round financing usually occurs when sales have begun, or at least a clearer picture of market potential is evident.
For example, let’s assume a start-up needs $1 million in seed funding. The investors issue a convertible promissory note with a 10% interest and with a 1.25 conversion multiple. So in effect, they give them a loan that can be converted to stock. At the time of the Series A round investment, which in this simple example is a $5 million VC investment one year later, the conversion occurs and they get shares that were equivalent to the $1 million seed money they originally put in the business times 1.25 plus accrued interest. So a year later the seed investors get shares that would be the same as if they invested $1,000,000 * 1.25 * 1.10 = $1,375,000. The logic is that by the time they are ready for Series A investment (in this case another $5 million) there is a clearer basis for valuation. They have begun to sell product, or they have a better idea on the size and scope of the market, they have time lines to product sale, etc. etc.
Seed money is most likely going to come from angel investors, angel networks, or small, boutique VC firms. The big boy VC firms will join in at the point of Series A or even Series B funding.