Two opposed pricing strategies dominate retail. One alternates between full price and frequent promotion, the other holds prices steadily low and rarely discounts.

The high-low model sorts customers

Alternating prices allows a retailer to charge more to shoppers who buy when convenient and less to those willing to wait for a promotion.

Both groups are served by the same shelf, with the timing of the purchase acting as the mechanism that separates them. No individual pricing is required.

The gain comes from the shoppers who pay full price, which means the model depends on a substantial share of buyers not tracking promotions.

Stable pricing sells predictability

Holding a consistently low price removes the reward for waiting and the penalty for buying at the wrong moment, which is worth something in itself.

It also removes the need for shoppers to compare timing, which reduces the effort of the whole trip and encourages larger, less deliberate baskets.

The cost is that no shopper ever pays a premium, so the model has to recover its margin through operating costs rather than through price variation.

Demand volatility is the hidden difference

Promotions create sharp peaks and troughs in demand, which propagate back through distribution centres and suppliers as sudden swings in required volume.

Those swings force excess capacity, safety stock and expedited shipping, all of which carry cost that does not appear on the shelf edge.

Flat pricing produces steady demand, which allows tighter inventory and more efficient logistics. A meaningful part of the low price is funded by that stability.

The models are hard to switch between

Moving from promotional pricing to stable pricing requires shoppers to stop expecting reductions, and that expectation takes a long time to fade.

During the transition, the retailer loses the promotional traffic before gaining the reputation for consistent value, which is a costly interval to sit through.

Several attempts at this switch across the industry have been abandoned partway, which is why most retailers remain in the model they started with.

Hybrids are the practical norm

Most retailers now run flat pricing on the items where shoppers have strong price memory and promotional pricing elsewhere.

This captures the reputational benefit of stability on visible lines while preserving the sorting effect on categories where shoppers cannot compare easily.

The consequence for shoppers is that a single retailer behaves differently by aisle, and a habit that works in one part of the shop misleads in another.