- How should an Egyptian ecommerce store set an acquisition budget from contribution margin?
- How do refunds, fulfilment costs and comparable customer cohorts affect the CAC decision?
Revenue does not tell you what you can spend
An Egyptian ecommerce store can increase advertising revenue while weakening its economics. Discounts, refunds, product costs and fulfilment all affect how much remains to fund acquisition. The useful budgeting question is not simply “How much revenue did advertising report?” It is “How much contribution remains from comparable new-customer orders before and after acquisition?”
Keep revenue, contribution and profit separate. Revenue is sales income under your chosen reporting definition. Contribution subtracts the variable costs included in your model. Overall profit also depends on overhead and other expenses. A positive order contribution after CAC does not prove the business is profitable.
Define CAC before comparing reports
Shopify’s CAC guide defines customer acquisition cost using acquisition costs divided by new customers over the same period. State exactly which costs you include. A media-only CAC can support campaign monitoring, but it is not equivalent to a broader CAC that includes relevant creative, agency and acquisition-tool costs.
Count new customers rather than orders, and document how you identify them. Align the cost window with the customer cohort and acknowledge timing limitations when spending precedes purchase. Do not divide this month’s costs by an unrelated lifetime customer total.
Also distinguish the store’s new-customer record from platform-attributed conversions. Different attribution rules can produce different reported totals. Use reconciled commerce and finance records for the contribution model, with advertising reports supporting diagnosis rather than replacing the ledger.
Build a blank first-order contribution worksheet
Start with a defined acquisition cohort and retain the actual order identifiers used for reconciliation. Leave the inputs unfilled until the finance or operations owner supplies them: new customers, sales after discounts, refunded revenue, product cost, fulfilment, payment charges, return handling and other variable order costs. Identify the currency consistently without inserting an assumed amount.
Net revenue equals sales after discounts less refunded revenue. Contribution before acquisition equals net revenue less the documented variable costs. Divide that contribution by the new customers in the same cohort to obtain contribution per new customer. Explain how recoverable returned inventory is treated, and do not subtract the same adjustment twice.
Record media and allocated non-media acquisition costs separately. Broader CAC equals their combined acquisition cost divided by new customers; media-only CAC uses media spend alone. Contribution after acquisition subtracts the included acquisition costs from contribution before acquisition. Keep exclusions visible, especially overhead, so a positive subtotal is not described as final profit.
Convert the calculation into a budget rule
Leave fields for contribution per new customer, the finance-approved retained contribution, planned new customers and allocated non-media acquisition costs. The acquisition ceiling per customer equals contribution before acquisition per customer minus the amount retained for overhead and uncertainty. Approval must come from the actual business plan, not an assumed market benchmark.
Multiply the approved ceiling by planned new customers to obtain the total acquisition allowance. Subtract the included non-media acquisition costs to find the remaining media allowance. Keep the plan distinct from observed performance: an allowance defines affordability, not how many customers the spend will acquire. If the remaining allowance is not workable, revise the plan or cost assumptions with finance rather than concealing the gap.
Review cohorts before increasing spend
Allow enough time for refunds and returns to mature. Record unrecoverable products, payment costs and fulfilment expenses consistently, including relevant costs from unsuccessful deliveries. Include cancellations and failed deliveries where they affect the actual cohort, and document the treatment of recoverable inventory and costs that remain payable.
Avoid assuming repeat purchases will rescue weak first-order economics without cohort evidence. Do not treat a platform revenue metric as profit or scale while refund exposure remains unresolved.
Use GA4 ecommerce measurement to improve event visibility, while keeping financial reconciliation separate. For help connecting acquisition planning with a documented contribution model, contact Kitely.
