Tariff Incidence

An import duty may be paid to customs by an importer, but its economic cost need not remain with that importer. Tariff incidence describes how this burden is distributed through changes in prices and profit margins, distinguishing the economic burden from the legal obligation to pay the duty.

How the burden is transmitted

A tariff raises the cost of bringing a foreign product into the domestic market. Whether consumers or producers ultimately bear that cost depends on how prices adjust.

• If the duty is passed on through a higher domestic price, buyers bear the burden through more expensive purchases.
• If foreign suppliers accept a lower export price, foreign producers bear part of the duty through reduced receipts.
• Importers and distributors may absorb part of the duty through narrower margins rather than passing it on fully.
• For a specific duty, competitive-market analysis treats the tariff as a wedge between the importing country's price and the foreign export price, abstracting from transport and other trade costs.

Why relative elasticities matter

The central principle is that the less price-responsive side of the market bears more of the burden. For international trade, the relevant comparison is between import-demand elasticity and foreign export-supply elasticity.

• When import demand is relatively inelastic, buyers cannot easily reduce purchases or find substitutes, so more of the duty is reflected in higher domestic prices.
• When foreign export supply is relatively inelastic, exporters find it difficult to redirect sales or adjust production, so they bear more through lower export prices.
• A small importing country, meaning one unable to influence the world price, faces perfectly elastic foreign export supply in the standard model; its tariff raises the domestic price by the full duty.
• A sufficiently large importing country may reduce the foreign export price by cutting import demand, shifting part of the burden abroad.

Which producers lose, and which may gain?

The word 'producer' requires care: foreign exporters, import-competing domestic producers, and domestic firms using imported inputs face different effects.

• Domestic producers competing with imports can benefit from the higher domestic price and expand output.
• Domestic firms using taxed imports as inputs face higher costs, which may reduce margins or raise their selling prices.
• Tariffs can therefore raise consumer and production costs, but a one-time increase in the price level is not the same as continuing inflation.