Coupons Exist To Charge Two Prices At Once

A coupon looks like a gift and functions as a sorting device. It allows one product to carry two prices without the store having to choose between them.

Different shoppers will pay different amounts

For any product, some buyers would pay considerably more than the shelf price and others would only buy at a discount. A single price either loses the second group or gives away money on the first.

A seller that could tell the two groups apart would charge each accordingly. The problem is that nobody announces which group they belong to.

The coupon solves this by making the discount conditional on an action rather than on an identity.

The effort is the point, not an inconvenience

Clipping, printing, entering a code or loading an offer to an account all take time. That time is what separates price-sensitive shoppers from indifferent ones.

A discount available with no effort at all would be taken by everyone, which is simply a lower price. The friction is doing the sorting work.

This explains why coupons are rarely made as easy as they could be. Removing every obstacle would defeat the mechanism.

Expiration and limits control the exposure

Dates and quantity limits cap how much revenue the seller gives up and concentrate the response into a period the store can staff and stock for.

They also convert a discount into an event, which drives trips rather than just cheaper baskets. A shopper who comes for one item buys others at full price.

The economics work when the additional traffic outweighs the margin surrendered on the discounted item.

Manufacturer and store coupons do different jobs

A manufacturer coupon is funded by the brand and aims to move a shopper from a competing product. The store is reimbursed and is largely neutral about which brand wins.

A store coupon is funded by the retailer and aims to move a shopper from a competing store. The brand is incidental.

Because the funding differs, the two can sometimes be combined, and the rules on combining them are set by whoever is paying.

Digital changes what the seller learns

An offer loaded to an account is tied to a shopper's history, so the discount can be targeted rather than broadcast.

That makes the sorting far more precise. The seller no longer needs effort as a proxy, because it already knows who buys the product and at what frequency.

The mechanism is unchanged and the aim is the same: two prices for one product, given to the two groups that will respond to them.