Import Duty and Domestic Price Transmission

A customs duty raises the cost of imported food at the border; lowering it generally makes imports cheaper and can reduce domestic prices. Price transmission is the process through which this lower import cost affects wholesale and retail prices, though the pass-through is rarely automatic or complete.

Transmission from duty to domestic price

A duty cut reduces the landed import cost, which includes the foreign price, transport and insurance costs, customs duty and other charges. It therefore makes imports commercially viable at a lower domestic price.

• Actual or anticipated imports increase market supply and strengthen competition with domestic produce.
• For a freely importable and comparable commodity, the domestic price tends to move towards the lower import parity price, rather than directly towards the world price.

Why pass-through may be incomplete

The retail price need not fall by the full duty reduction because transmission depends on external costs, market structure and the distribution chain.

• Rising world prices or exchange-rate depreciation can offset the reduction in customs duty.
• Quotas, licensing, sanitary requirements, port delays and other non-tariff barriers can restrict import volumes.
• Freight, storage, processing and retail margins can absorb part of the benefit.
• Weak competition or market concentration can allow intermediaries to retain part of the duty reduction.
• If domestic prices are already below import parity, a duty cut may produce little additional import or price effect.

Food-security implications and trade-offs

Lower duties can moderate consumer food inflation, improve affordability and reduce immediate pressure on public stocks. Imports may complement buffer-stock releases when domestic availability is inadequate.

• Cheaper imports can depress farm-gate prices and weaken production incentives if they arrive during harvest or persist for long periods.
• Duty changes are therefore most effective when they are timely, predictable and coordinated with procurement, stock management and support for domestic production.