Gross margin

Gross margin is the share of sales revenue remaining after subtracting the cost of goods sold (COGS), expressed as a percentage. It's calculated as (revenue minus COGS) divided by revenue, and it's one of the most-watched numbers in retail because it reflects how much room a retailer has to cover operating costs and still turn a profit.

How gross margin works

Gross margin is driven by two levers: the price charged and the cost paid for goods. A retailer can raise gross margin by increasing price, negotiating lower supplier costs, or shifting sales mix toward higher-margin categories. Gross margin is usually reported at the SKU, category, and company level, and retailers track it separately from markup, since the two describe the same relationship from different starting points.

• Revenue: total sales at retail price
• COGS: what the retailer paid for the goods sold, including freight and duty
• Gross margin percent: (revenue minus COGS) divided by revenue

Retailers often set a gross margin target at the category level rather than expecting every SKU to hit the same number. A key value item might run a thin margin because it's heavily price-compared, while a private-label item in the same category runs a much wider margin, and the two average out to the category's target.

Example

A sporting goods retailer sells a jacket for $120 that cost $72 landed. Gross profit is $48, and gross margin is 40 percent ($48 divided by $120). If a competitor forces a price cut to $105 while cost stays at $72, gross margin drops to about 31 percent, a meaningful hit even though the retailer is still profitable on the item. Across a category of similar jackets, that 9-point drop, if left unaddressed, can translate into a large gap versus the category's planned profit for the season.

Why it matters for retailers

Gross margin is the foundation profitability metric for a retail business; if it erodes across enough SKUs, no amount of sales volume growth fixes the underlying problem. Category managers use gross margin targets to guide pricing, promotion, and markdown decisions, and to spot categories that are quietly losing profitability even as revenue holds steady.

Because gross margin sits upstream of every other profitability metric, small unnoticed erosion, a few points here and there across hundreds of SKUs, can add up to a significant hit to overall profit well before it shows up clearly in a quarterly report. Retailers that review gross margin only at month-end often discover the erosion long after the pricing decisions that caused it, by which point the affected inventory has already sold through at the lower margin.

How Retailgrid helps

Retailgrid tracks gross margin at the SKU and category level in real time inside the AI workspace, and pricing guardrails stop a price change or markdown from dropping margin below an approved floor before it goes live. Category managers can see margin impact before approving a change rather than discovering the hit afterward in a monthly report, which turns gross margin from a lagging number into something actively managed day to day.