This article studies the influence of economic growth on the collectability of proportional income tax
revenues in Bulgaria. Using VAR models the relations between the tax buoyancy and tax elasticity of
the proportional tax and the GDP are modelled for the period from March 2008 through March 2020.
The conclusions drawn from the empirical analysis prove that the collectability of the revenue from
proportional tax shows no increase. Changes in economic growth do not bring to changes in the
revenue from proportional tax on income in Bulgaria.