Food inflation eased in August and supplier lines did not follow

29 September 2026 · This page is provided in English.

Kristel Mägi

Eurostat put euro area food, alcohol and tobacco inflation at 1.1% for August 2026, in the release of 17 September. That is a basket of retail prices, weighted across a continent. It says nothing about whether the line on your supplier's invoice matches the price list you were given.

Price Double Check lives in the gap between those two numbers: a buyer forwards the month's invoices and the supplier's list to an email address, and the reply names the lines where the billed price and the listed price disagree. An index cannot do that work. An index is an average of other people's prices, and no supplier bills an average.

What was published on 17 September

Eurostat's full figures for August put euro area annual inflation at 3.2%, against 2.9% in July. The flash estimate published on 1 September had said 3.3%, so even the headline moved a tenth of a point once the complete data arrived. Inside the total, food, alcohol and tobacco came in at 1.1%, down from 1.2% a month earlier.

Two things about that component are worth holding on to. It follows what households pay at the till, not what a manufacturer charges a distributor for a case of gels. And it is an average over a basket: a product that rose by a fifth and a product that fell by a fifth leave it roughly where it was.

An average is not a line

The acceptance run behind this service is a useful counterweight, because it worked at the other end of the telescope. Eleven documents from one real supply chain, 382 invoice lines compared against the price lists the buyer had actually been sent: 327 lines matched to the cent, and 41 carried a genuine price difference. That is 10.7% of the lines, in a period when no published aggregate moved by anything of the sort.

The 17.75% line deserves the attention. One item code was billed at €13.23 against €11.235 in the newest list the buyer held, and the list for the following year was never sent at all. On that delivery the single line took 91% of the margin, which is the argument in measuring an error against the margin rather than against the invoice.

The bar at €1.26 is the quieter case and the more common one. The price appeared on invoices from March while the list in force still said €1.176, and €1.26 only entered a price list in October. Nothing on any single invoice marks it out. It is visible because someone kept the documents and compared them with each other.

What a soft index changes for a buyer

A low aggregate takes away a conversation, and that is its practical value. While food inflation ran hot, a supplier could move a line and attribute it to the market, and a buyer had little to say back. At 1.1% across the basket, a line that moves by seven or seventeen per cent is a decision somebody made about one product, and the reasonable question is which list it came from.

• Ask for the list in writing, with the date it takes effect. A list with no valid-from date runs until the next one arrives, which is a rule to apply rather than an assumption to make.
• Compare on the item code, not the description. Descriptions drift between a supplier's catalogue and its invoices; the code is what holds.
• Keep the previous list. Packaging that shrank at the same price is an increase, and nothing on the invoice prints the pack size.
• Rank what you find by percentage until you know the volumes. Euros come later, when the invoices show how much of each line you actually buy.

None of this argues with Eurostat. The index is measuring what it says it measures, carefully, across the whole euro area. It is simply the wrong instrument for the question a buyer has, which is not about the continent but about one supplier, one code and one month.

Forward one invoice and the price list that was in force when the goods moved, and the comparison comes back by email with the lines where the two disagree. What the service costs and what the reply looks like are on the home page.