Possession rate: definition, calculation, analysis

Knowing your share of shelf allows you to concretely measure the space your brand occupies in a given point of sale. More than just a percentage, this indicator allows you to manage your visibility, your field actions, and your negotiations with distributors. Whether you are a brand in supermarkets, the hospitality sector (Horeca), or DIY stores, the share of shelf helps you transform your presence data into real sales drivers.

In this article, we explain how to calculate it, analyze it, and above all, exploit it intelligently in your commercial steering strategy.

What is the share of shelf?

The share of shelf is an indicator used to measure the actual presence of a product or a brand in a point of sale. It corresponds to the ratio between the number of references or equipment held by a point of sale and the total possible number. In other words, it lets you know what place your brand occupies in an assortment or equipment pool, compared to the entire category.

But that's not all! Indeed, the share of shelf is not limited to your product references. You can apply it to all equipment or visibility elements in a point of sale, i.e., your POS materials or displays.

Why track the share of shelf?

Tracking the share of shelf gives a clear view of the real space occupied by a brand inside a point of sale. It is an indicator of presence and sales power on the ground. It helps to:

• Measure the visibility of a brand compared to its competitors.

• Evaluate the weight in the assortment or in the equipment of an establishment.

• Negotiate with the distributor by showing that a higher share of shelf can generate more revenue.

• Track sales progress: how many new points of sale gained, how many additional facings or draft taps.

• Steer marketing and merchandising actions: Highlighting points of sale where the share of shelf is low is a growth opportunity. Consolidating stores where the rate is already high helps secure market share.

How to calculate the share of shelf?

Calculating the share of shelf for products

To find out the share of shelf of your products, you need to divide the number of references held by a point of sale by the number of references in the category.

Let's take concrete examples to understand better:

• In the vacuum cleaner department at Darty La Défense, 30 references are presented in total. Your brand is present with 4 models. Your share of shelf is therefore: (4 ÷ 30) x 100 = 13.3%

• A bar has 10 beer taps. Your brand occupies 3 taps. Your share of shelf is therefore: (3 ÷ 10) × 100 = 30%

• In the wall paint department of a large DIY store, you count 200 references. Your brand occupies 25 references (colors, sizes). Your share of shelf is: (25 ÷ 200) × 100 = 12.5%

• In a hypermarket, the yogurt aisle has 30 references in total. Your brand is present with 5 references. Your share of shelf is therefore: (5 ÷ 30) × 100 = 16.6%

Through these examples, as you will have understood,

• In specialized and major supermarkets, we speak in product references.

• In Horeca, in visible equipment (taps, fridges, beverage dispensers).

• In DIY stores, in assortment variants (shades, packaging).

Calculating the share of shelf for merchandising

It is also very interesting to know your brand's visibility through your merchandising.

Share of shelf = (Number of merchandising elements of the brand ÷ Total number of available merchandising slots) x 100

You can calculate it in total or by merchandising element. Let's take a concrete example:

• A store has 5 end-cap locations. Your brand occupies 1. Your share of shelf is: (1 ÷ 5) × 100 = 20%

• A bar has 10 visibility assets (chalkboards, parasols, branded fridges, placemats). Your brand occupies 4. Your share of shelf is: (4 ÷ 10) × 100 = 40%

Not all merchandising locations are equal: some provide more visibility than others because of their location in the store, but also because of the POS materials or displays that can be placed there. You can therefore weight your share of shelf calculation. To do this, you can assign a weight to each type of asset.

Let's take the following example:

• End-cap = 5 points

• Floor sticker = 4 points

• Checkout POS = 4 points

• Central aisle = 3 points

• Shelf talker = 2 points

• IRC (instant redeemable coupons) = 1 point

These weightings reflect the impact value of each location.

Next, you will calculate the store's total theoretical score by multiplying the number of locations of each type by the weight you have assigned to them.

• 2 end-caps (2 × 5 = 10)

• 3 floor stickers (3 × 4 = 12)

• 5 checkout POS (5 × 4 = 20)

• 10 aisle POS (10 × 2 = 20)

• 20 IRCs (20 × 1 = 20)

This gives the store a total score of 82 points.

Next, you will be able to calculate the score occupied by your brand. To do this, you keep the same method but only for your assets.

• 1 end-cap (1 × 5 = 5)

• 1 floor sticker (1 × 4 = 4)

• 2 checkout POS (2 × 4 = 8)

Your brand has, in this example, a score of 17 points.

To calculate the weighted share of shelf, you will then divide the brand's score by the total score.

In our example, your weighted share of shelf is (17 ÷ 82) × 100 = 20.7%. Without weighting, your score would have been (4 ÷ 40) x 100 = 10%.

What are the differences between share of shelf, numeric distribution, and weighted distribution?

The share of shelf differs from WD and ND.

The share of shelf measures the share occupied by a brand in a category or equipment. It therefore measures the relative presence in a point of sale.

Numeric distribution (ND) represents the percentage of points of sale where the brand is present at least once. This lets you know how many stores carry your product.

To calculate your ND, you need to divide the number of points of sale in which you are listed by the total number of stores in which you could be listed.

For example, if you have a panel of 1,000 stores, and you are already listed in 600 stores, your ND is 60%.

Weighted distribution (WD) is the weight in sales revenue of the stores that carry the brand, compared to the total market sales. It measures the quality of listing (small stores vs large, powerful chains).

To calculate your WD, you need to divide the revenue of the stores that carry your brand by the total revenue of the stores that offer your product's category.

If we take the example above, the 600 stores in which you are listed generate 80 million dollars. The