To calculate return on marketing investment, marketers need to know which of the following?

• A. Net profit and revenue
• B. Gross margin and marketing expenditure
• C. Customer lifetime value
• D. Click-through rate

Answer: (B)

Return on marketing investment is measured by how much profit the marketing activity generates relative to what was spent. The key is to use profit that’s directly tied to the marketing effort, which is typically represented by the gross margin from the sales influenced by the campaign. Comparing that to the marketing expenditure shows whether the campaign is delivering profit above its cost. Using gross margin plus marketing spend isolates the financial impact of the marketing activity itself, rather than mixing in unrelated costs or metrics.

Net profit and revenue mix in all kinds of other costs and do not isolate the marketing-driven profitability. Customer lifetime value and click-through rate provide valuable insights, but they focus on long-term value or engagement rather than the immediate profitability of a specific marketing investment.