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Why Green Coffee Prices and Retail Bag Prices Do Not Move Together
Understand how purchase timing, roasting losses and other costs separate green-coffee prices from retail bags. Compare real offers by net weight and total paid.
Quick Answer
Green-coffee prices and retail bag prices do not move one-for-one because they describe different products, purchase dates and costs. Roasting changes the coffee's weight, a bag includes packing and selling costs, and its beans may have been bought under an earlier contract. For shopping, compare the total you would pay with the net roasted-coffee weight; use a market index as context for the input price.
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What the ICO Indicator Measures
The International Coffee Organization's indicator-price rules describe specified green-coffee physical-market quotations in US cents per pound. The rules define an ex-dock market basis, with adjustments where needed. The composite combines group indicators rather than pricing every individual lot or reporting farmgate payment.
For a dated illustration, the September 2026 Coffee Market Report put the composite's monthly average at 262.18 US cents/lb, or $2.62/lb rounded, down 8.7% from August 2026. Those figures describe the green-coffee index in that period, rather than an 8.7% change in a particular retail bag.
If the headline instead quotes a futures contract, use the Coffee C price explainer to identify its month and quotation units.
Put the Two Price Labels Side by Side
Separate the market reference from the actual offer you can buy:
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| Detail | Market reference | Retail offer |
|---|---|---|
| Product | Specified green coffees or a composite indicator. | The exact roasted coffee, whole bean or ground. |
| Unit | For the ICO indicator, US cents per pound of green coffee. | Bag price and net roasted weight, in the offer's currency. |
| Time | The named daily observation or monthly average. | The date and sale or subscription conditions. |
| Stage | A defined green-coffee market basis. | A seller's finished-product offer, including its delivery terms. |
Match currencies and weight units before comparing amounts. One pound of green coffee and a smaller bag of roasted coffee have different denominators as well as different product stages.
An origin description helps identify the coffee but does not disclose its purchase contract. An Arabica-versus-Robusta comparison likewise helps describe the product, rather than making two retail coffees equivalent.
Follow the Product and the Clock
Roasting changes the weight. Moisture and other material are lost during roasting, as research tracking coffee beans during roasting documents. One pound bought green does not become one pound available to pack roasted. A business calculation needs the actual batch yield, rather than a universal roast-loss percentage.
The finished product has other costs. Roasting, packing, storage, transport and selling contribute alongside the green coffee. Their actual shares vary with the business and product.
The purchase clock differs from the shelf date. A seller may be offering coffee acquired under an earlier agreement. Today's market movement does not reset that purchase price. A new purchase may also have a different coffee, reference period or pricing arrangement.
A 2026 FAO review of coffee, cocoa and tea markets describes incomplete and uneven price transmission across the value chain. Market structure, policies and transaction costs affect how changes pass between stages. There is no single pass-through delay to assign to every retail coffee.
A Hypothetical Cost Change, Calculated Carefully
Suppose total costs of $10 consist of $4 for one input and $6 for everything else. Let only that input rise 20%, with all other costs fixed:
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| Component | Before | After | Change |
|---|---|---|---|
| One input | $4.00 | $4.80 | +$0.80 |
| Other costs | $6.00 | $6.00 | $0.00 |
| Total costs | $10.00 | $10.80 | +$0.80, or 8% |
The input calculation is $4 × 1.20 = $4.80. The extra $0.80 divided by the original $10 total is 8%. Equivalently, 40% input share × 20% input-price change = 8% total-cost change, with other costs fixed.
The same cost-share logic applies when an input falls. This example illustrates a cost change, not a typical coffee-business cost share or a profit margin: no selling price is supplied.
Make a Comparison That Helps You Buy
Divide the total price you would pay by the net roasted-coffee weight. Include delivery where it differs, and check sale or subscription conditions.
These hypothetical US-weight offers have no delivery charge; their metric weights are rounded equivalents:
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| Offer | Calculation | Price per pound |
|---|---|---|
| 340 g (12 oz) for $15 | $15 ÷ 12 × 16 | $20.00/lb |
| 454 g (16 oz) for $18 | $18 ÷ 16 × 16 | $18.00/lb |
The $15 bag has the lower ticket price but the higher unit price. Choose with the coffee itself and the amount you can finish in mind too. Our coffee buying guide covers those household decisions.
To assess a seller's explanation for a price change, look for the coffee, purchase period and costs it actually discusses. A market index alone cannot disclose that business's contract or margin.
A personal note: I find it easier to make sense of coffee prices when I keep the market story beside the shopping decision. The green-coffee indicator gives me context; the bag's net weight, delivery charge and offer terms tell me what I would actually pay. For my own choice, I want a quantity I can enjoy and finish, at a price I understand.
Sources
- International Coffee Organization: Rules on Statistics: Indicator Prices, ICC-105-17 Rev. 1
- International Coffee Organization: Coffee Market Report, September 2026
- Development of coffee bean porosity and thermophysical properties during roasting (2024), Journal of Food Engineering
- FAO: Price transmission in global coffee, cocoa and tea markets, July 2026