Eckhard Janeba (Dec 2000 “Tax Competition when Governments lack Commitment” American Economic Review 90, 1508-19) has recently suggested a novel approach to modelling the relationship between governments and multinational firms. As part of ongoing research into various aspects of multijurisdictional tax competition, this paper investigates the possibility of allowing for collusion between governments when setting tax rates in the model. The findings show that a self-enforcing agreement is possible, with the beneficial effect of cutting the firm’s excess profits, limiting investment in excess capacity, and raising government revenue.