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The fiscal systems of the member territories of the Eastern Caribbean Central Bank (ECCB) have come under increasing scrutiny recently. This is partly due to the persistent fiscal deficits experienced by some of the countries, namely Antigua, Grenada, Montserrat and Dominica. Additionally, declining access to investment capital and concessionary finance in favor of the emerging markets and former Soviet economies that are in transition requires that the member territories make a greater effort at fiscal solvency. This paper attempts to empirically examine the changes in tax buoyancies in the member countries of the ECCB over the 1980 through 1997 period and provide explanations for some of the changes that occurred. In Section 2 of the paper we provide different methods for estimating tax elasticity and explain why similar difficulties other researchers have experienced lead us to the estimation of tax buoyancies instead. A methodology is proposed in Section 3 to distinguish between the different functional forms used for estimating tax buoyancies and to select the ones moot appropriate for use in the ECCB member territories. The empirical results and explanations for the estimated tax buoyancies are provided in Sections 4 and 5. General conclusions are provided in Section 5.