What makes a discount expensive
Blanket discounts are expensive, yet brands use them for their speed and reliability in moving short-term volume. The problem shows up in the P&L a week later.
A 10% discount on a $100 product reduces revenue by $10 while your cost of goods stays fixed. On a product with a 50% gross margin, that discount absorbs 20% of your gross profit per unit. To break even on margin dollars, you need meaningfully higher volume — volume that doesn’t always materialize. Run a 20% sitewide sale on the same economics and you’ve cut your per-unit profit nearly in half.
The compounding problem is who receives the discount. McKinsey research found that 65% of customers say targeted promotions are a top reason to make a purchase. Broadly applied discounts cannibalize revenue from purchases that would have occurred at full price. A targeted promotion — scoped to a first purchase, a basket threshold, a lapsed customer — puts most of the discount cost toward orders that genuinely needed an incentive.
McKinsey research details a North American retailer that shifted from mass seasonal discounts to segmented offers. After three months, the company saw approximately 3% annualized margin improvement in initial tests, without reducing total promotional activity.
Discount structures that protect margins
Not all discounts carry equal margin risk. The most effective structures require customers to spend more to unlock the offer—the incremental revenue offsets the discount.
Volume-based discounts: Customers add a third item to unlock a discount, increasing their absolute spend even if the per-unit margin is slightly lower.
Tiered discounts: These offer increasing discounts as quantity increases (e.g., 5% off one, 10% off two, 15% off three). This motivates customers to reach the next tier, increasing basket size and offsetting the discount rate.
Free shipping: By eliminating shipping costs, you reduce cart abandonment while encouraging customers to add more items to qualify, effectively increasing the average order value.
First-time customer discounts: Frame these as a one-time welcome rather than a recurring offer. This attracts customers genuinely interested in the product rather than those shopping exclusively for discounts.
Not all discounts carry equal margin risk. The most effective structures require customers to spend more to unlock the offer—the incremental revenue offsets the discount.
- Volume-based discounts: Customers add a third item to unlock a discount, increasing their absolute spend even if the per-unit margin is slightly lower.
- Tiered discounts: These offer increasing discounts as quantity increases (e.g., 5% off one, 10% off two, 15% off three). This motivates customers to reach the next tier, increasing basket size and offsetting the discount rate.
- Free shipping: By eliminating shipping costs, you reduce cart abandonment while encouraging customers to add more items to qualify, effectively increasing the average order value.
- First-time customer discounts: Frame these as a one-time welcome rather than a recurring offer. This attracts customers genuinely interested in the product rather than those shopping exclusively for discounts.
Not all discounts carry equal margin risk. The most effective structures require customers to spend more to unlock the offer—the incremental revenue offsets the discount.
The stacking problem
Brands running multiple simultaneous promotions face margin risk that often goes unnoticed until it’s too late: a customer applies a newsletter code, a loyalty reward, and a free shipping threshold in the same transaction. Each promotion was designed to be profitable in isolation. Combined, they may not be.
Without rules that define which discounts can coexist, the customers most familiar with your promotion structure capture a disproportionate share of margin. This is a configuration problem as much as a strategy one. If your promotion engine doesn’t let you define exclusions, stacking is effectively a customer decision, not a business one.
What you can do with Centra’s promotion engine
Centra’s native promotional tools give brands the flexibility to offer targeted discounts and the control to make sure those discounts apply exactly where intended, right out of the box.
Brands running multiple simultaneous promotions face margin risk that often goes unnoticed until it’s too late: a customer applies a newsletter code, a loyalty reward, and a free shipping threshold in the same transaction. Each promotion was designed to be profitable in isolation. Combined, they may not be.
Without rules that define which discounts can coexist, the customers most familiar with your promotion structure capture a disproportionate share of margin. This is a configuration problem as much as a strategy one. If your promotion engine doesn’t let you define exclusions, stacking is effectively a customer decision, not a business one.
