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Markdown and clearance sales:
clear out inventory

Profile photo Fabrice Decroo

Fabrice Decroo

Director of Consulting

August 17, 2026

A markdown is a structural, non-reversible price reduction and should not be confused with a promotion. If not managed properly, it erodes profit margins due to excessive caution or excessive price reductions.

Price reductions cost U.S. retailers approximately $300 billion a year, or nearly 12% of the industry's revenue.

Aging inventory doesn’t just take up warehouse space—it eats into profit margins every week it remains unsold. Markdown —the gradual, irreversible reduction in the price of a product nearing the end of its life cycle—is the strategy that addresses this urgent need. If not managed properly, it results in selling off inventory too early or too late. This guide provides a comprehensive framework.

In everyday language, markdowns are often confused with sales; both result in a lower price. Yet the logic behind them is opposite.

  • A promotion is a temporary and reversible marketing tool: it aims to generate traffic or sales growth for a product, which will then return to its regular price.
  • A markdown is a structural, non-reversible price reduction: it is applied to inventory that must be sold before a deadline (end of season, end of collection, expiration date), and the price never goes back up.

Confusing the two leads to two symmetrical mistakes: treating a markdown as a one-time promotion (and thus under-discounting it, allowing inventory to pile up), or treating a promotion as a markdown (and permanently damaging the price perception of a product that didn’t need to be sold off at a discount).

Markdowns are not just a minor end-of-season issue; they are one of the biggest sources of margin loss in the retail industry. According to a Retail Dive analysis of the U.S. market, markdowns cost retailers approximately $300 billion in revenue in a single year—nearly 12% of the sector’s total revenue.

$300 billion

in lost revenue for U.S. retailers over the course of a year due to markdowns, representing approximately 12% of the sector’s total revenue—with more than half of these unplanned markdowns attributed to inventory management errors (Retail Dive).

This figure reflects only the visible part—the marked-down price. It does not account for the cost of storing the product while it awaits markdown, nor the opportunity cost of the retail or warehouse space it continues to occupy.

The most commonly discussed mistake is selling off a product at a price that erodes too much of the profit margin—a product that could have been sold at a higher price. But the opposite mistake, though less obvious, is just as costly: waiting too long to mark down a product, and ending up with unsellable inventory that is ultimately destroyed, donated, or liquidated at a total loss.

According to the State of Fashion study by McKinsey & Company (BoF-McKinsey), 30 to 40 percent of the clothing produced is sold at a discount or marked down—or never sold at all—representing an estimated loss of between 70 and 140 billion dollars worldwide.

30–40%

of the clothing produced worldwide is sold at a discount or never sold at all—an estimated loss in value of between 70 and 140 billion dollars per year (McKinsey & Company, State of Fashion).

The textile industry is the most extensively documented in this area, but this approach applies to any category with a limited lifespan: end-of-generation electronics, seasonal products, and food items with a short shelf life.

A well-developed markdown policy is not simply a matter of “lowering the price when items aren’t selling.” It is based on five key factors:

  • Turnover rate: measuring how quickly inventory is actually selling, category by category — see our article on the trade-off between margin and turnover rate.
  • The timing and extent of markdowns: deciding when to mark down items—and by how much—without winging it—see our article on creating a markdown grid.
  • Discontinued items and slow-moving inventory: Identify items that are no longer selling before they become a problem—see our article on dealing with unsold inventory before it becomes a costly issue.
  • Forecasting Remaining Inventory and Seasonality: Estimating How Much Will Remain to Be Sold at the End of the Season — see our article on forecasting remaining inventory.
  • Governance: Establish clear rules to ensure that markdowns remain a managed process, not a panic reaction at the end of the season.
1

Monitor the flow rate continuously

Compare, item by item, the actual sales rate with the rate needed to sell through inventory by the deadline.

2

Detect the discrepancy early

Identify shipments that are behind schedule several weeks before the end of the season.

3

Simulate the required depth

Calculate the minimum discount that will allow the remaining inventory to be sold off in the time remaining, without selling at a greater discount than necessary.

4

Follow a schedule, not your instincts

Apply predefined markdown tiers (for example, -20%, then -40%, then -60%) at predetermined milestones.

5

Measure and Adjust

Compare the actual results with the projected trajectory, and adjust the schedule for the following season accordingly.

The GENIUS Promotions module on the Booper platform handles promotions and clearance sales alongside standard pricing—following the same approach as the other GENIUS modules: combining AI with business rules rather than replacing human judgment with blind automation.

The goal is not to have a tool that decides on price reductions on its own, but rather a tool that provides early warnings, quantifies the impact of a price reduction scenario before implementing it, and allows a category manager to approve it.

Before the end of the season, three questions to ask yourself

  • Do I know, reference by reference, how my actual flow rate compares to the target?
  • Do I have a set markdown schedule, or do I decide at the last minute?
  • Can I calculate the impact of a price reduction before applying it, or do I find out afterward?

The questions we're asked most often before getting started.

A promotion is a temporary and reversible marketing tool; the price then returns to normal. A markdown is a structural and irreversible price reduction applied to inventory that must be sold before a deadline.

No. This mechanism applies to any category with a limited shelf life: seasonal products, end-of-generation electronics, and food items with a short expiration date.

By tracking actual sales volume against the sales trajectory needed to sell the inventory by the deadline, and identifying any deviation several weeks in advance.

Both are costly, but in different ways: marking down prices too early unnecessarily erodes profit margins, while marking down prices too late risks ending up with unsellable inventory that must be liquidated at a total loss or destroyed.

No. The pace and extent of markdowns depend on the category's shelf life.

Sources: Retail Dive, “Markdowns cost retailers $300B last year” — retaildive.com · McKinsey & Company, “The State of Fashion 2025” (BoF-McKinsey) — mckinsey.com · Booper product data (GENIUS Promotions module; Coopérative U and Barbotteau Group case studies published by Booper).

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