PRICE DIFFERENCE

Definition

The price gap measures the difference between a product’s price at a retail outlet and a reference price: the average market price, the price of a direct competitor, the price of a substitute product, or the price from a previous period. It is expressed as an absolute value (in euros) or as a percentage. It is one of the most closely monitored indicators in pricing because it summarizes a product’s competitive position or performance in a single figure.

Why it's important

• Summarize the competitive positioning: distill a category into a single figure that is easy for all departments (sales, finance, marketing) to understand.
• Quickly detect deviations: a gap that widens by 2 points in a month should trigger an analysis—or even action.
• To serve as a basis for business commitments: “We will maintain a maximum variance of -3% compared to Competitor A” is a measurable target.

A concrete example

A gardening retailer is tracking its price gap across 800 key SKUs compared to three competitors. The median gap is +1.2% (the retailer is slightly more expensive). In the “power tools” category, the price gap rises to +4.8%, which negatively impacts price perception in a high-traffic category. A targeted repricing initiative reduces the gap to +1.5% in three weeks, at an estimated margin cost of 0.4 percentage points for the category, offset by a 9% increase in volume.

How to measure/use it

Operational price gap monitoring requires defining the scope (products tracked, competitors included), the calculation method (median, average, volume-weighted), the frequency (daily for e-commerce, weekly for mass retail), and the alert thresholds (the price gap beyond which an action is triggered). Pricing analytics tools continuously generate these price differences and make them available in interactive dashboards.

Common Mistakes

• Relying solely on the average: this can mask problematic extreme outliers in the KVI.
• Compare differences across categories: without taking into account differences in price sensitivity (a 5% increase in the price of basic foodstuffs is more problematic than a 5% increase in the price of textiles).
• Respond to every fluctuation: without considering the cause (a competitor’s temporary promotion does not justify a permanent price adjustment).

Learn more

• Research & Data: Price tracking and web scraping to continuously collect price difference data.
• Solutions: Pricing Analytics to generate variances by category and trigger alerts.
• Tip: Operational Pricing Consulting to set up alert thresholds and associated workflows.
• Resources: See our pricing FAQ to properly account for an average price difference.

Mini FAQ

Median deviation or average deviation?

The median range is generally preferred because it is less sensitive to outliers (exceptionally expensive or bargain-priced items). The average range can be used as a supplement, but comparing the two provides an idea of the dispersion.

What is the alert threshold?

It depends on the category and the retailer's policy. A rule of thumb: trigger at +3% relative to the market for KVI products, +5% for other items. Beyond that, a price adjustment is generally warranted.

How do you handle a negative variance?

A negative price gap is sometimes intentional (discount positioning) and sometimes unavoidable (an overreaction to a competitor’s move). A case-by-case analysis is necessary: if the competitor has raised its price, the retailer can recoup some margin by remaining the least expensive but with a smaller price gap.