Bearing the legacy from central-planned system, the tax system in local China still lacks transparency and, in many cases, the liabilities of firms, especially those with extensive influences, are subject to negotiation despite the new tax-reform 1994. Applying Hirschman’s Exit-Voice theory, we construct a game model of interplay between firm and local government, in terms of exit and voice for preferential tax treatments, thereby revealing dynamics of these two options under rational entrepreneurship of economizing transaction cost. Suggested by the model, exit not only induces firm to opt for voice, it also underpins firm’s voice that forces local government to compromise. Particularly, when holding private information of exit cost, firm is able to mimic behaviors of those with high mobility so as to boost the effectiveness of voice. The empirical cases fully illustrate such rational entrepreneurship of exit plus voice to profit from local preferential policy