Shrinkflation: How to Spot a Smaller Pack at the Same Price

The price did not change. The box looks the same. But there is less inside. That is shrinkflation: a product gets smaller while its price stays the same, or even goes down a little. You pay more for what you get, and the shelf tag gives you no hint.

Why it is so easy to miss

Most of us check prices, not weights. We remember that a bar of chocolate costs about 1.50, not that it used to weigh 100 g. When the bar becomes 90 g at 1.50, nothing on the shelf looks different. The new weight is printed on the pack, in small type, and there is no “was” label next to it.

Shrinkflation also tends to happen in small steps. Ten percent less in one product, a few sheets fewer per roll in another, a bottle that goes from 1.5 l to 1.35 l. Each change is easy to overlook. Together they add up.

The number that gives it away: unit price

The pack price hides shrinkflation. The unit price shows it immediately. Unit price is the price divided by the quantity, per kg, per litre or per piece (see how to compare unit prices).

Take a breakfast cereal you buy every couple of weeks:

Date	Pack	Price	Per kg
March	500 g	€3.49	€6.98
May	500 g	€3.49	€6.98
July	450 g	€3.49	€7.76
September	450 g	€3.59	€7.98

From March to July the pack price did not move at all. The unit price rose by about 11 %. By September, the small visible price increase of 10 cents hides a total unit price increase of about 14 % since March.

If you only remember “it’s still about €3.50”, you would never see it.

Shrinkflation in different shapes

It is not always about weight. Look out for:

• Fewer pieces. A pack of 10 dishwasher tablets becomes 9. A box of 25 tea bags becomes 20.
• Smaller volume. A 1 l bottle becomes 900 ml in a bottle that looks almost identical.
• Less of the good part. More air in a bag of crisps, a thinner layer of filling. This one is hard to measure from a receipt, but weight changes still often show up.
• Changed multipacks. A six-pack becomes a four-pack at a price that is “lower” but higher per can.

The first three show up clearly when you compare per piece, per litre or per kg over time.

Why receipts help

To catch shrinkflation you need two things for the same product at two points in time: the price and the size. A receipt usually gives you the price and often the size in the line text, for example “CORN FLAKES 450G”. If you keep receipts as data instead of paper, you have that history without writing anything down.

The catch is that the line text often changes too. “CORNFLAKES 500G” in March, “CORN FLAKES 450 G” in July. Comparing them per kg rather than per pack is what makes the two prices comparable at all, and keeping the 500 g and 450 g packs apart, instead of blending them into one average, is what makes the jump visible. How receipt lines are linked to products is explained in product matching.

What you can do about it

Spotting shrinkflation does not mean you have to accept it:

• Compare unit prices across brands. The brand that shrank may now be more expensive per kg than an alternative that did not.
• Check other pack sizes. Sometimes only one size shrinks. The larger pack may still have the old unit price.
• Watch the promotions. A promotion on the new smaller pack may only bring the unit price back to where it was before the shrink. That is not a saving.
• Count it in your own inflation. A product whose unit price rose 14 % is part of your personal cost of living even if its sticker price barely moved. See personal inflation.

How Tasarruf helps

Tasarruf reads the size and price from each receipt line and normalises them to a unit price per kg, per litre or per piece. The product page shows the first, last, lowest and highest price with a chart, so a pack that shrank at the same price stands out as a rise in unit price. Right after you save a receipt, a card tells you which products went up or down. Try Tasarruf.