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Market note · 11 September 2026

Tampa ammonia benchmark falls to $555/t in September, fourth monthly drop

The Tampa ammonia contract price, a key reference for North American fertiliser markets, has fallen for a fourth consecutive month, settling at $555 per metric ton CFR in September — down $80 from the prior month.

This latest decline extends a steady retreat from the $825/t peak recorded in May, when supply disruptions had pushed prices sharply higher. The market has now shed roughly a third of its value over four months.

Ammonia is a core feedstock for nitrogen fertiliser production, and the Tampa price is widely used as a settlement reference in supply contracts across the Americas. Sustained declines typically signal easing supply tightness and can pressure downstream urea and UAN pricing.

What it meansBuyers of nitrogen fertilisers and ammonia-linked contracts should expect softer input costs to persist if the downtrend continues, while sellers exposed to Tampa-indexed contracts face further margin compression.

Related on gidex.com: urea supply · the fertiliser desk · the trading desk

Original note by GIDEX Group based on reporting by Fertilizer Daily. Written up by the GIDEX market desk — see how these notes are made. Not investment advice.

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