Income tax reforms generally constitute some changes in marginal tax rates and its income thresholds which often lead to a higher tax liability. Taxpayers may respond to these changes differently, mainly by trying to lower their tax payments. Self-employed individuals have a greater incentive to strategically adjust to a lower income declaration. Using administrative tax data, this paper examines the reaction of self-employed taxpayers to the 2008 Indonesian Income Tax Reform using bunching

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... ysis. Beside a clear evidence on bunching around the first kink point, our empirical findings suggest that Indonesia exhibits special cases. We find an inertia of pre-reform bunching around the first kink point in later years as well as an extraordinary bunching above the first kink point in the post-reform periods.