Is a discount profitable? Calculate contribution before the offer
SNS Team · Reviewed 2026-11-05
A discount may move stock or generate more orders without leaving enough money to operate.
Before launching, calculate what remains from each discounted order after its costs. Ask whether price is really the issue, or whether sizes are unavailable or customers lack confidence. Do not judge order volume alone: review the remaining contribution and delivery process. Save the calculation before your next promotion.
Calculate what remains from an order
Contribution margin is sales value minus the variable costs associated with the order. Include product cost, packaging, payment fees, shipping support and cancellation or return effects using your records. Contribution is not net profit: fixed expenses still need to be covered.
A practical step to try
Illustration: a product priced at 1,000 with variable costs of 600 leaves 400 before advertising and fixed costs. A discount of 100 reduces this to 300 if costs stay unchanged. Maintaining the same total contribution requires more orders. That increase is a hypothesis to test, not a promise created by discounting.
How should you evaluate discount advertising?
Compare contribution after advertising cost, rather than ROAS alone. Separate new and returning customers where possible. Check whether the discount created additional purchases or reduced the price of orders that would have occurred anyway. Agree promotion limits before publishing.
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Prepared by the SNS team. Examples are educational, not a promise of results or a published client case.