In economics, tax incidence is the analysis of the effect of a particular tax on the distribution of economic welfare. Tax incidence is said to "fall" upon the group that ultimately bears the burden of, or ultimately has to pay, the tax. The key concept is that the tax incidence or tax burden does not depend on where the revenue is collected, but on the price elasticity of demand and price elasticity of supply.
Tax incidence does not consider the concept of tax efficiency or the excess burden of taxation, also known as the distortionary cost or deadweight loss of taxation, is one of the economic losses that society suffers as the result of a tax. For example, United States Social Security payroll taxes are paid half by the employee and half by the employer. However, some economists think that the worker is bearing almost the entire burden of the tax because the employer passes the tax on in the form of lower wages. The tax incidence is thus said to fall on the employee and due to the need for workers for a particular job, the tax burden also falls, in this case, on the worker.
Example of Tax Incidence
Imagine a $1 tax on every barrel of apples an apple farmer produces. If the product (apples) is price inelastic to the consumer (whereby if price rose, a small demand loss would be accounted for by the extra revenue), the farmer is able to pass the entire tax on to consumers of apples by raising the price by $1. In this example, consumers bear the entire burden of the tax; the tax incidence falls on consumers. On the other hand, if the apple farmer is unable to raise prices because the product is price elastic (if prices rose, more demand would be lost than extra revenue gained), the farmer has to bear the burden of the tax or face decreased revenues: the tax incidence falls on the farmer. If the apple farmer can raise prices by an amount less than $1, then consumers and the farmer are sharing the tax burden. When the tax incidence falls on the farmer, this burden will typically flow back to owners of the relevant factors of production, including agricultural land and employee wages .
Shared tax incidence
The imposition of a tax can result in a reduction to both consumer and producer surplus relative to the pre-tax scenario.
Where the tax incidence falls depends (in the short run) on the price elasticity of demand and price elasticity of supply. Tax incidence falls mostly upon the group that responds least to price (the group that has the most inelastic price-quantity curve). If the demand curve is inelastic relative to the supply curve the tax will be disproportionately borne by the buyer rather than the seller. If the demand curve is elastic relative to the supply curve, the tax will be borne disproportionately by the seller.
Tax efficiency
In the example provided, the tax burden falls disproportionately on the party exhibiting relatively more inelasticity in the situation. This characteristic results in a reduction of the ability of the party to participate in the market to the level of willingness that would have been present in the absence of the tax. The loss is conceptually defined as a loss of surplus and the loss of surplus is characterized as deadweight loss. Policy makers evaluate the surplus and deadweight loss in relation to the imposition of a tax in order to better evaluate the efficiency of a tax or the distortion that the imposed tax causes on the attainment of market equilibrium.
Policymakers must consider the predicted tax incidence when creating them. If taxes fall on an unintended party, it may not achieve its intended objective and may not be fair.