Excess Share of Voice

Also known as · ESOV, Share of Voice, SOV, Werbedruckanteil

Excess Share of Voice is the gap between a brand's share of advertising and its share of market — a reliable predictor of future growth.

Excess Share of Voice (ESOV) is the difference between a brand’s share of category advertising and its share of market. A brand with 10 percent market share and 15 percent share of voice has an ESOV of plus five.

Why Excess Share of Voice matters

Analysis of hundreds of campaigns shows a consistent relationship: brands that sustain a positive ESOV tend to gain share, and brands that let it fall negative tend to lose it. It is one of the few planning rules with genuine predictive evidence behind it.

Excess Share of Voice in practice

It is a share game. What matters is spend relative to competitors, not the absolute figure.
It works over time. Effects accumulate across years rather than within a campaign.
It pairs with the 60/40 split. Excess voice builds the brand; activation converts the demand it creates.

Cutting advertising in a downturn usually shows up later as lost share — the mechanism is a negative ESOV.

Source · Les Binet & Peter Field, IPA

Related terms

Attention

Attention is the share of an advertisement that is actually looked at — a measure that separates real exposure from technical delivery.

Penetration

Penetration is the share of category buyers who bought a brand at least once in a given period — the main driver of brand growth.

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