Retail markdown strategy: how to clear inventory without destroying margin

Key takeaways

• A markdown pricing strategy is a plan to cut prices at the right time and by the right amount to clear slow-moving stock without giving away more profit than necessary.
• Good markdown decisions run on three signals: sell-through rate, days of supply remaining, and price elasticity.
• A cut made too early loses margin that was never at risk, while a cut made too late forces a much bigger discount to shift the same stock.
• How deep to cut depends on how far sales are lagging and how much selling time is left. A few smaller, staged cuts usually protect more margin than one big drop.
• Across a large assortment, a pricing platform automatically picks the right time and cut for each product, always within the retailer's margin floor.

What is a retail markdown strategy?

A retail markdown strategy is a plan for when to lower a product's price and by how much, so that a retailer can sell stock before it loses value. It decides in advance which products get marked down, what triggers the first price drop, and how far the price falls at each stage. Unlike a promotion, which is temporary, retail markdowns are permanent, so once a product is marked down, it usually stays down until it clears.

Why markdown strategy matters for margin

Markdown strategy matters for margins because the timing and size of each price drop determine how much money a retailer keeps on each unit sold. The same product can be marked down by 20% or 50%, depending on when the retailer acts.

Unsold stock is one of retail's highest costs. IHL Group's 2026 study puts inventory distortion, the combined cost of overstocks and out-of-stocks, at $1.7 trillion a year, or 6.2% of global retail sales.

A markdown strategy manages clearing the overstock side of that without giving back more margin than necessary.

Two mistakes drive most of the margin loss:

1. Marking down too early gives up margin on stock that would have sold at full price anyway.
2. Marking down too late leaves a retailer holding slow stock that now needs a much steeper discount to move, often just as every competitor clears the same stock.

A deliberate approach to markdown pricing avoids both by matching each price drop to what the product actually needs, rather than defaulting to a blanket sale. That is how a retailer protects margin rather than clearing the same stock at a deeper cut than timing requires.

The three inputs that drive markdown decisions

Three inputs drive every markdown decision: sell-through rate, days of supply remaining, and price elasticity. The first shows how fast a product is selling, the second how long the current stock will last at that pace, and the third how much demand responds to a lower price. Read together, they answer whether a markdown is needed, when to apply it, and how deep it should be.

Sell-through rate

Sell-through rate is the percentage of stock that sells within a set period: units sold divided by the stock on hand at the start, times 100.

It is the clearest early signal of a markdown, because a rate that falls behind target with limited selling time left indicates stock that will not clear at its current price.

Read against a target rather than on its own, sell-through rate tells a retailer that a price drop may be needed, and roughly how soon.

Days of supply remaining

Days of supply remaining measures how long existing inventory will last at the current sales velocity. This is typically calculated by dividing units on hand by average units sold per day.

It turns a sell-through figure into a countdown: two products can sell at the same rate, but the one with 200 days of supply and only 60 days of selling season left is well behind, while the other is on track.

This input sets the deadline because a markdown must clear the stock before the season ends, the product is replaced, or, for perishables, its shelf life runs out.

Price elasticity

Price elasticity is how much demand changes when the price changes. A highly elastic product sells a lot more with a small cut, while an inelastic one barely responds, so its price has to drop much further to move the same volume.

A product's price elasticity is one of the factors that determine how deep a markdown needs to go. Without it, a retailer is guessing whether 10% or 40% will clear the stock.

Elasticity is estimated from past sales where the price has changed, and it feeds into demand forecasting, which uses that same history to predict how much a product will sell at each price.

When to take the first markdown

Retailers should take the first markdown as soon as it becomes clear that a product will not sell out at full price within its must-sell window. Three signals indicate that moment: sell-through falling below the pace needed to clear the stock, the product nearing a life cycle stage where its value drops, or a competitor cutting the price on a comparable item.

Each of these signals is reason enough to act on its own, so retailers should initiate a markdown when the first appears, rather than waiting for the others.

The sell-through trigger

The sell-through trigger fires when a product is selling too slowly to clear on time. A retailer sets a target rate for the selling period, then compares actual sell-through against it. When actual sell-through falls below target, and days of supply confirm the stock cannot catch up before the deadline, that gap signals a markdown.

The earlier the gap appears, the smaller the markdown needed to close it, which is why this trigger is checked throughout the selling period, not only near the end.

The life cycle timing trigger

The life cycle timing trigger fires when a product reaches a stage where its value is about to drop, regardless of its current sell-through. For example, a seasonal line loses appeal once the season ends, an electronics model loses value the moment its replacement lands, and a perishable loses all of it at expiry.

In each scenario, product depreciation dictates the timeline, not sales pace. Waiting for sell-through to drop often leads to discounting after the product has already lost its value. Aligning markdowns with life cycle pricing means planning the price path around these known drop-off points from the start.

The competitive trigger

The competitive trigger fires when a competitor drops the price on the same or a similar product. That resets what shoppers expect to pay, so the product can stall even if its sell-through looked fine the week before. Matching every competitor's cut is a race to the bottom, so retailers should be cautious about following suit.

To avoid that, retailers should run two checks first: whether the competitor's cut is lasting or just a short promotion, and whether the product is one shoppers actually price-check.

A markdown is permanent, while a competitor's promotion may not be. If the cut is permanent on a product shoppers watch, a markdown may be justified. If it is only a short promotion, a permanent markdown is the wrong tool, since it gives up margin for a threat that will pass on its own. In that case, the better response, if any, is a considered promotional pricing strategy.

How deep to markdown

In markdown pricing, depth depends on how far sell-through has fallen behind target and how much selling time is left. A small gap caught early needs only a light cut, while a wide gap with little time left needs a deep one.

The matrix shows direction, not a fixed depth: a markdown gets deeper as sell-through falls and as time runs out. The actual size depends on the required sell-through acceleration and the product's elasticity, as covered below.

Calculating the required sell-through acceleration

Calculating required sell-through acceleration replaces vague performance estimates with a precise sales-velocity target.

Start with the units still in stock and the remaining weeks to sell them to determine the sales rate needed to clear the stock on time. Compare that to the current rate; the difference shows how much faster the product must sell. Elasticity then translates that needed lift into a price cut.

For example, take a product with 700 units left and 10 weeks to sell them. Clearing on time means selling 70 per week, so if it is currently selling 50 per week, it has to sell 40% faster. That 40% is the target the markdown has to hit.

How deep a cut it needs depends on elasticity: a product shoppers respond to strongly gets there with a small cut, while one they barely respond to needs a deeper one.

Staged markdowns vs. single deep cut

A staged markdown involves several smaller cuts over time, while a single deep cut results in a single large reduction.

Staged markdowns usually protect more margin because the retailer can stop as soon as the product starts selling again. Say a first cut of 15% gets it moving. The retailer stops there and keeps the remaining margin, rather than taking the full 40% in a single deep cut.

Staging only works with two things: enough selling time left to make several cuts, and a check after each one to see whether sales picked up before deciding on the next. When time is short, a single deep cut is the practical choice, but it carries a risk: the entire cut is set before the retailer sees how customers respond, making it easy to go deeper than the product needs.

The floor: cost and margin constraints

Every markdown has a floor, which is the lowest price worth setting, determined by the product's unit cost and any minimum margin the retailer holds to.

Above the floor, a deeper cut trades margin for speed; at the floor, there is no margin left to give. The table below shows how quickly that happens for a $100 item priced at $45.

For an illustrative $100 item that costs $45, the starting margin is 55%. The floor sits at the 55% markdown, where price meets cost; a higher-cost item reaches its floor sooner.

Gross profit falls faster than the discount suggests: a 40% markdown is not a 40% hit to profit but a 73% one, cutting it from $55 to $15.

Below-floor, every unit sells at a loss. That can still be worth it when holding the stock costs more than clearing it, or when the product will be worth nothing once its life cycle ends. The floor is the default stopping point, and dropping below it is a deliberate exception, never routine.

How to sequence markdowns across a season or life cycle

Sequencing is the order and timing of markdowns across a product's selling life, from full price to final clearance. A good sequence places each markdown when sell-through falls behind and goes no deeper than that moment requires, protecting margin at every step.

It moves a product through a full-price period, one or more markdowns, and a final clearance, coordinating those cuts with any promotional events that fall in the same window.

A four-stage markdown sequence

A four-stage markdown sequence moves a product from full price to clearance in steps, cutting only as far as each stage needs.

• Stage one is the full-price period. The product sells at full price while the retailer tracks sell-through against target and takes no action as long as it stays on pace.

• Stage two is the first markdown. This triggers once sell-through falls behind while full-price demand still exists. The first markdown is typically a small cut, because acting early improves the rate while margin is still high.
• Stage three is a second markdown. Retailers typically use the second markdown only if the first did not close the gap. With less time left, this cut goes deeper, sized to the stock still on hand and the weeks remaining.
• Stage four is final clearance. Stage four happens just before the deadline. Whatever is left is cleared down to the floor, or below it if holding the stock would cost more than selling at a loss.

Coordinating markdowns with promotional events

Coordinating markdowns with promotional events is part of retail promotion optimization, which schedules discounts so they reinforce one another rather than stack. For instance, a big traffic event like Black Friday can move slow stock on its own, which may remove the need for a separate markdown, or make a smaller one enough.

The risk, however, is that when an event discount stacks on top of an existing markdown, it cuts far deeper than the product needs. Before an event, retailers should check which slow items the event will likely clear anyway, then hold or shrink their markdowns so a product never takes both cuts at once.

Keeping markdowns and promotions on a single plan, as Competera does through promo management, prevents them from working at odds.

Common retail markdown mistakes

Most retail markdown mistakes stem from acting on an incomplete picture of demand. These errors typically involve discounting at the wrong time, applying uniform price cuts across dissimilar items, taking secondary markdowns without evaluating previous results, or ignoring how discounting one product cannibalizes sales of another. Each misstep sacrifices margin that a data-driven approach would otherwise protect.

Marking down too early

A markdown taken too early cuts the price before a product has had a fair run at full price. The cost is margin loss on units that would have sold at full price anyway, because a markdown lowers the price for everyone, including the shoppers who were already going to buy.

Cutting early feels safe, because it lowers the risk of leftover stock. However, if done too soon, it gives up guaranteed margin to prevent a problem that may never happen.

Marking down too uniformly

A uniform markdown applies the same cut across a range of products, regardless of how each one is selling. For instance, a blanket 30% off treats a product that is nearly sold out the same as one sitting untouched, so it discounts stock that never needed a cut while undercutting the stock that did.

Markdown depth should follow each product's own sell-through and elasticity. That per-product approach, the core of markdown optimization, clears the right units instead of lowering prices across the board.

No monitoring between markdown stages

Weak markdown management shows up most between stages, where a retailer takes one cut and moves to the next with no read on whether the first one worked. A series of cuts protects margin only if the retailer reads the response to each one, since a first markdown that has already restarted sales makes a second one pure margin loss.

Tracking the right pricing KPIs across stages (sell-through rate and days of supply, above all) tells a retailer whether to stop, hold, or cut again.

Ignoring cross-product effects

Discounting a product in isolation ignores how price changes shift demand across the entire category. Lowering the price on one item can cannibalize sales from a full-price substitute sitting right next to it, clearing inventory on one SKU while eroding margins on another.

Cross-product effects can also work in reverse: discounting an entry-level item may pull through higher-margin accessories and complementary products. Mapping these relationships before setting a markdown ensures a single price cut does not fix one inventory issue at the expense of overall category profitability.

How Competera Pricing Platform supports retail markdown strategy

Competera Pricing Platform embeds automated markdown optimization into every pricing decision. The platform detects when inventory requires a discount, calibrates the price drop to product elasticity, simulates revenue and margin impact, and executes updates within preset guardrails across the entire assortment.

Sell-through monitoring and markdown trigger identification

Competera monitors sell-through across the assortment and flags a product for markdown when its rate falls behind, instead of on a fixed calendar date. Markdowns roll out in planned waves, so a product drops to the next discount level only after it hits its sell-through target. By tracking every product at once, the platform surfaces slow movers early, while a smaller cut can still clear them.

Elasticity-calibrated markdown depth recommendations

For depth, the platform sizes each markdown to the product's own elasticity rather than a blanket percentage. Its Contextual AI demand model reads elasticity, inventory, and product relationships to recommend the smallest cut that still clears the stock in time. Set product by product, it spares fast movers from needless discounting and gives stuck stock the cut it needs, while protecting how shoppers read the retailer's prices.

Competera Pricing Platform generates elasticity-calibrated markdown recommendations across your entire assortment, with margin floors automatically enforced in every repricing cycle.

What-if simulation for markdown scenario planning

Before any price changes, Competera runs markdown scenarios as what-if simulations. A retailer can test depths and timings and compare the predicted effect on revenue, gross profit, and margin over the next 1 to 12 weeks, each with a probability. Competera predicts that impact with 95%+ accuracy, so it can choose the best balance of clearing stock and protecting margin before a single price moves.

Automated markdown deployment with guardrails

The retailer sets the rules, and Competera works within them. Price floors, minimum margins, and business constraints are defined up front, and no recommendation drops a price below them on any repricing cycle. Within those limits, assignment, depth, and execution run automatically, and every recommendation stays visible and open to override, so the commercial team keeps control of the strategy while the platform handles the markdown management that would take weeks by hand.

Automating markdowns this way points to the future of markdown and promo optimization, where cuts follow demand rather than the calendar. For a retailer still cutting by hand, this is the clearest case for putting AI markdown solutions to work now.

Conclusion

A retail markdown strategy turns markdowns from a blunt, end-of-season discount into timed, sized decisions. Built on each product's own demand signals, it answers the questions every markdown raises: when to take the first cut, how deep to go, and when to hold.

Run this way, a markdown strategy breaks the trade-off between clearing inventory and protecting margin. Most retailers treat the two as a choice, cutting deep to move stock or holding on and getting stuck with it. Timing each cut and sizing it to the product lets them do both, clear what has to move while giving up only the margin the moment requires.

At the scale of a full assortment, Competera Pricing Platform reads every product's signals and turns them into AI-driven markdown recommendations, each sized to the product's elasticity and held above its margin floor, refreshed daily across every store and channel.

Talk to an expert to see how Competera turns markdown strategy into pricing decisions across your own assortment.