Some criticism has been raised that the expense of kosher certification — plus the cost of running a plant partially or completely in keeping with the dietary laws — adds to the price of the certified foods paid by all consumers.|
The response from marketers of these products is that certification, like advertising, increases sales, lowers the manufacturing cost per unit and thereby reduces prices.
Leonard Sloane, "Calling It Kosher: How to and Why," The New York Times, 18May75, p. F3.
Must a food manufacturer charge more money for his product to cover the cost of Kosher supervision?
Almost never. The actual cost of supervision is generally minimal. The increased sales which are generated by the Kosher certification program more than compensate for the additional Kosher related costs.
Union of Orthodox Jewish Congregations (OU) web site at http://www.ou.org/kosher/kosherqa/supervis.htm#6