This study examines whether participating in governmental decisions influences taxpayers' cooperation. The results of experiment 1 show that participants tend to contribute more when they can vote on different rules for a public good game. Experiment 2 reveals that tax payments are lowest in a tax simulation when participants benefit from tax payments and can not vote. However, when the participants did not benefit from tax payments, voting had no impact and cooperation was about the same as when participants benefited and could vote. Furthermore, voting increases procedural fairness and trust mediates the effect of procedural fairness on tax payments.