The same discount for everyone: the decision that quietly erodes margin

In most companies, the discount decision is managed with a single rate: “10 percent off this period.” The rate is set, applied to all customers or a whole channel, and the work is done. This approach is managerially easy; it ends the debate, is simple to apply, looks fair.

But this ease comes at a cost. Because the same discount for everyone ignores the fact that customers are different from one another.

Not every customer has the same price sensitivity. Some customers will not buy without a discount — for them, the discount is what makes the sale happen. Some customers would have bought with or without a discount — for them, the discount is just a gift. Every discount given to someone who does not need it is subtracted directly from margin and produces no additional sale.

A standard discount cannot tell these two groups apart. It gives the same discount to all. And the part given to the group that does not need it erodes margin quietly — without anyone noticing, because a single rate looks fair and orderly.

The right question is not “what percentage off this period?” It is:

Does this discount go to the customer who actually makes the sale happen, or as a gift to the one who would have bought anyway?

A single rate crushes different customers

A single discount rate crushes the diversity in the customer base into one average. And an average decision gives both too much and too little.

For a price-sensitive customer, 10 percent may not be enough; that customer will not buy without a deeper discount, and the standard rate misses them. For a price-insensitive customer, 10 percent is unnecessary; they would have bought anyway, and the standard rate gives them free margin. The same rate misses an opportunity in one and loses money in the other.

The problem is not the discount itself. It is the discount being applied to everyone the same way, without distinction. The margin loss arises not from the existence of the discount but from it going to the wrong person.

Sensitivity is a spectrum

Customers sit on a spectrum of price sensitivity. At one end, customers very sensitive to price, who will not buy without a discount; at the other, customers little sensitive to price because of relationship, service or habit, who buy without a discount too.

This sensitivity leaves traces in the customer’s past behaviour: do they buy during discount periods, or always? How do they react to price changes? How sensitive are they to competitor prices? These signals give an idea of which sensitivity band a customer is in.

A discount, when differentiated by this band, becomes far more efficient: enough discount to make the sale for the sensitive customer, no unnecessary discount for the insensitive one. The goal is not to give everyone less discount; it is to direct the discount to where it works most.

Differentiation is not chaos

An objection is fair: customer-specific differentiated discounts can lead to unmanageable chaos, favouritism or inconsistency. The appeal of a single rate is precisely that it avoids this chaos.

But differentiation does not mean arbitrariness. In a well-designed structure, the discount is tied not to personal bargaining but to a sensitivity band and clear rules. A certain range for a customer in a certain band; approval to go outside the band. This is not “let every salesperson give whatever they want to whoever they want”; on the contrary, it takes the discount out of personal whim and places it in a decision framework.

So the real choice is not “a single rate or chaos?” It is “a blind single rate, or rule-based differentiation by sensitivity?” The second is both more profitable and more disciplined.

Margin erosion is silent

The most dangerous side of the same discount for everyone is that its cost is invisible.

A discount given to the wrong person does not look like an error. There is no single large loss; only the sum of thousands of small, unnecessary discounts. Each looks insignificant on its own, but together they erode a significant part of margin. And because a single rate looks orderly and fair, no one questions this erosion.

This silence makes the problem permanent. A visible error is fixed; an invisible erosion lasts for years. The first step to recovering margin is to make this silent loss visible: how much of the discount made the sale happen, and how much was just a gift?

Closing

Applying the same discount to all customers looks easy and fair, but it is expensive. Because not every customer has the same price sensitivity: some will not buy without a discount, some would have bought anyway. A standard discount cannot tell these two apart and quietly erodes margin with the discount it gives to those who do not need it.

The solution is to differentiate the discount by sensitivity, but in a rule-based rather than arbitrary way. The goal is not less discount for everyone but directing the discount to where it works most. The first step is to make the silent margin erosion visible.

The right question is:

Are we debating what percentage off to give this period, or seeing whether the discount goes to the customer who makes the sale happen or the one who would have bought anyway?