Inside Tanzania’s Cashew Auctions: How a Farmer’s Crop Actually Gets Priced

A Tanzanian cashew crop does not move from tree to export container the way most agricultural commodities do. It passes through a structure built around cooperative societies, a regulatory board, and — as of recent seasons — a digital exchange, all operating under rules that specify not just who may buy, but how many seconds a bid has to land.

Two channels, one crop

Farmers sell their raw cashew nuts (RCN) to Agricultural Marketing Cooperative Societies (AMCOS), which consolidate the crop into warehouses under Tanzania’s Warehouse Receipt System. From there, the stock is sold in one of two ways. The main channel is the public auction, run through the Tanzania Mercantile Exchange (TMX) in partnership with the Cashewnut Board of Tanzania (CBT), the Warehouse Receipts Regulatory Board and the Tanzania Cooperative Development Commission. A parallel channel, the Primary Market System introduced for the 2020/21 season, lets CBT-licensed local processors buy directly from AMCOS without bidding against export-focused buyers — a mechanism designed to give domestic factories first claim on nuts they intend to shell in-country, without auction-related deductions.

Getting a seat at the auction

Under TMX’s published trading procedure for the 2025/26 season, any buyer — domestic or foreign, large or small — may register, but only after clearing several gates: compliance with the Cashew Industry Act No. 18 of 2009, the Warehouse Receipts Act, the Commodity Exchanges Act and the Cooperative Societies Act; a season-specific RCN Buying License issued by CBT; and a completed Buyer Declaration Form submitted to TMX. A buyer cannot bid beyond the quantity backed by their bid security deposit, and unlicensed buyers are barred outright from the Online Trading System.

How a lot actually sells

TMX and the cooperative unions jointly build a “Sales Catalogue” from warehouse stock verified under the Warehouse Receipt System, published at least 12 hours before an auction opens (with any late stock added up to an hour beforehand). Registered buyers get a private pre-bid session, and the highest price submitted there becomes the opening price when live trading begins. Each lot then runs for 60 seconds, with a 40-second extension if a new bid comes in — a mechanic borrowed from timed online auctions to stop last-second sniping. Lots trade on an “all or none” basis, meaning a bidder takes the whole lot or nothing. The relevant cooperative union has half an hour after the close to consent to the result.

What happens after the hammer falls

A winning buyer has 24 hours to collect a sales invoice from the cooperative union, and must pay within 120 hours (five working days) of receiving it — miss that window and the lot goes back to auction. Physical collection from the warehouse must happen within 14 days, a clock that only starts five days after payment clears. Buyers retain the right to inspect quality before taking possession and must co-sign a certificate with the warehouse operator confirming what was actually collected; any quality or quantity dispute goes to CBT, with TMX assisting follow-up. Shipping is not left to the buyer’s discretion either: cargo sourced from Mtwara, Lindi and Ruvuma — the regions that between them account for the large majority of the national crop — must move through Mtwara Port, while cashews from other producing regions may also route through Dar es Salaam or Tanga.

Scale and timing

The mechanics matter because of the volumes involved. As the 2025/26 season opened, CBT was targeting roughly 700,000 tonnes of national output, with independent market observers expecting a more conservative but still record figure above 600,000 tonnes; the first TMX auction in November 2025 moved 26,254 tonnes, and MAMCU’s cooperative sales alone added another 82,000 tonnes within weeks, according to trade reporting from that period. RCN export prices in that window sat in the $1,720–1,750 per tonne range CFR Ho Chi Minh City, with buyers reportedly favoring smaller, more selective purchases over large forward commitments given quality variability between lots — a reminder that even inside a rules-based auction, quality assessment at the point of sale still drives who wins which lot.

Why this matters for buyers

None of this is optional paperwork. A buyer who arrives at the start of a season without a CBT license and TMX registration already in hand cannot participate, and the payment and collection windows are tight enough that logistics need to be arranged well before the first lot goes live. Understanding the AMCOS–cooperative union relationship, and the distinction between the open auction and the Primary Market System, is the difference between bidding as an informed participant and discovering the rules mid-season.