By Dhiladhila Magazine · Issue 09

A charge by weight falls hardest on low-value bulk, and that describes a fertiliser sack far better than a copper cathode.

The corridor levy is charged by weight, not value: 90 US cents on every tonne, whether that tonne is copper worth thousands of dollars or fertiliser worth a few hundred. That design is neutral on paper and uneven in practice, because the per-tonne charge takes a bigger bite out of cheap, bulky cargo than out of dense, expensive metal.

Much of what the corridor carries inbound and for agriculture is exactly that kind of cargo. Fertiliser, maize, malt and agro-chemicals move in bulk to and from the farms of Zambia and the DRC, and for those value chains a charge by weight is quietly regressive.

Why weight-based charges pinch farm inputs

A tonne of copper cathode and a tonne of urea pay the same 90 cents, but they are not the same trade. Copper carries the charge as a rounding error on a high-value load; fertiliser, sold to price-sensitive farmers, carries it on a thin margin. The same flat levy is a smaller share of a rich cargo and a larger share of a poor one.

That is the structural quirk of any per-tonne fee. It is simple to administer and easy to declare, but it does not distinguish between the freight that can absorb it and the freight that cannot. Agricultural bulk sits firmly in the second group.

Charging by the tonne asks the cheapest cargo to pay the highest share.

The corridor is a farm-input route too

It is easy to picture the Walvis Bay corridors as a copper conveyor, but they also carry the inputs that regional agriculture depends on. The Port of Walvis Bay describes a growing role in agricultural cargo, and fertiliser, sulphur, maize and agro-chemicals are among the bulk commodities the corridor is built to handle for landlocked farmers.

For a Zambian or Congolese grower, the corridor is the supply line for the fertiliser that sets the season’s yield. Zambia alone imported around US$661 million of fertiliser in 2024, much of it bulk cargo whose delivered cost decides what farmers can afford to apply.

The same road that exports copper imports the fertiliser that grows the food.

Where a small levy meets an already costly input

Fertiliser reaches the region’s farms through a concentrated supply chain, dominated by a handful of firms and marked by mark-ups estimated above 40 per cent in some recent years. On top of that sit road-freight charges that already make some corridors dearer than others for bulk agricultural goods.

Against those costs, 90 cents a tonne is small, but it is added at the least forgiving point in the chain. Every charge layered onto an already marked-up input eventually reaches the farm gate, and for smallholders the cumulative freight bill, not any single levy, is what prices fertiliser in or out of reach.

No single charge breaks a farmer, but every charge on inputs finds the farm gate.

Building the agricultural case for the corridor

The corridor’s planners know agriculture is part of the story. The new Western Corridor route being built towards Walvis Bay is framed around integrated agriculture alongside mining, a 371-kilometre road upgrade backed by an agribusiness and a mining firm, with two new bridges to open the farming districts it crosses. Better roads lower the freight that weighs on farm goods.

That is the offsetting logic. A per-tonne levy raises the cost of agricultural freight at the margin, while corridor investment aims to lower it in bulk. Whether farmers come out ahead depends on which force wins: the small new charge, or the larger saving from a faster, better road.

A levy nibbles at farm freight; a better road can feed it back.

For an agribusiness, input supplier or commercial farmer in the corridor’s hinterland, the levy is a reminder that freight costs land hardest on the cheapest, heaviest goods, which in agriculture means inputs and staples. The decision is whether to treat the charge as a negligible line item, or to press, alongside it, for the road and border improvements that would more than repay it in lower delivered costs.

Sources: The Namibian; Western Corridor trade route to Walvis Bay launched (Infrastructure News); Port of Walvis Bay (WBCG)