Tax revenue growth in Bangladesh this year has been one of the lowest in recent years. There is now demand for a cut in corporate income tax rate with the forthcoming FY15 budget. Is this a good idea from a fiscal point of view?
Whether or not a tax-cut will increase or lower tax revenues depend on the tax rates and the tax system in place. If tax rates are in the prohibitive range, a tax cut will result in increased tax revenues. Arthur Laffer distinguished between the arithmetic effect and the economic effect of tax cuts. The arithmetic effect means that a lowering of the tax rate will result in lower tax revenues by the amount of the decrease in the rate. The economic effect identifies a positive impact of lower tax rates on work, output and employment which expand the tax base. If tax rates that are currently in the prohibitive range are lowered, the economic effect of a tax cut will outweigh the arithmetic effect and revenue collection will increase with tax cut.