Formula
Target margin: Price = Cost ÷ (1 − Margin) · Keystone: Price = 2 × Cost
FAQ
Is keystone pricing still relevant?
Yes, as a quick heuristic — especially where wholesale is involved, since a keystone retail price leaves room for a 50% wholesale discount at cost.
Should competitor prices override this?
They're a constraint, not a method. If the market price is below your cost-based price, the issue is cost structure or positioning, not the calculator.