A product sells for SAR 100 before tax and has a carrying cost of SAR 60. Its 40% gross margin looks comfortable. The supplier then quotes SAR 72 for replenishment while the retailer prepares a 10% promotion. Three different questions now matter: the profit on existing inventory, the prospective profit on the next batch, and the effect of the discount. Compressing them into one percentage can conceal an expensive decision.
The following figures are illustrative. Selling prices exclude tax, and costs exclude recoverable taxes. Keep the comparison consistent: do not divide a profit calculated before tax by a tax-inclusive selling price and compare it with a report using net revenue.
Two margin views, not two accounting alternatives
Gross margin on recorded sales uses their net revenue and the cost of goods sold under the applicable accounting policy. A replenishment margin is a management estimate of what could happen when new units are purchased and sold under assumed conditions. A higher supplier quotation does not automatically replace the recorded cost of units already held.
IAS 2 requires inventory measurement at the lower of cost and net realisable value. When inventory is sold, its carrying amount becomes an expense in the period of the related revenue. Keep this accounting basis for financial reporting and present prospective replacement-cost analysis separately as a decision scenario. Do not describe the scenario result as realised profit.
| Assumed transaction | Net selling price | Unit cost used | Gross profit per unit | Margin |
|---|---|---|---|---|
| Existing stock sold without discount | 100 | 60 | 40 | 40% |
| New batch sold at the unchanged price | 100 | 72 | 28 | 28% |
| New batch sold with a 10% discount | 90 | 72 | 18 | 20% |
The final discount reduces the selling price by SAR 10 but cuts unit profit from SAR 28 to SAR 18, approximately 35.7%. Calling the discount “small” therefore says little about its profit impact. What matters is the remaining gap between price and cost, not just the discount as a percentage of the original price.
How many extra units would compensate?
Suppose expected sales are 100 units from the new batch without a discount, producing SAR 2,800 in gross profit. At SAR 18 per unit, matching that amount requires at least 156 units; 155 units produce only SAR 2,790. The promotion therefore needs approximately 56% more volume before allowing for returns or additional order-fulfilment costs.
This is a mathematical comparison threshold, not a prediction that customers will buy that much more. Check inventory availability and fulfilment capacity, and consider whether customers are simply bringing next month's purchases forward rather than creating genuinely additional demand. If the offer generates sales of other products, assess the whole basket without counting the same benefit twice.
Gross profit also differs from order contribution after fulfilment. If the campaign causes additional payment charges, packaging or delivery costs, include these separately in the contribution analysis according to their actual behaviour. Avoid deducting an expense twice where the cost figure already incorporates it.
A price decision needs a test, not a reflex
Maintaining a theoretical 40% gross margin at a cost of SAR 72 requires a net price of 72 ÷ 0.60 = SAR 120. The formula identifies the price needed for that target; it does not prove that customers will accept it. Alternatives may include changing pack size, adjusting the assortment, improving purchase terms or accepting a temporarily lower margin within an explicit limit.
Test a selected product group over a defined period. Record the actual price after vouchers and discounts, unit volumes, returns, and profit in both money and percentage terms. Do not generalise from a week affected by stockouts: lower sales may indicate unavailable products rather than resistance to the price. Also separate a unit-cost increase from customers switching into lower-margin items.
At the sales and purchasing review, show the accounting report first, then place the replenishment scenario beside it with its assumptions visible. Cheap legacy stock will no longer conceal pressure on the next batch's profit, and concern about a supplier increase will not become an inappropriate change to the recorded inventory value.
Sources & further reading
Visit the original source to explore the concept and its wider context.
General educational content. Appropriate treatment depends on your business and accounting policies; consult your accounting professional when applying it to business records.
