Connect advertising results to acquisition cost and contribution before increasing spend.
Start with the work
Campaign revenue is only one part of the decision. Use the same reporting period for spend and attributed revenue. Separate product costs, acquisition costs and fixed expenses before interpreting the result.
Illustrative business scenario
Illustrative example: advertising spend of 1,000 produces attributed revenue of 4,000. ROAS is 4.0. If contribution before advertising is 30%, that revenue contributes 1,200 and leaves 200 after advertising, before fixed expenses and other excluded costs.
Put the workflow into practice
Collect matching inputs
Gather spend, attributed revenue and the costs included in the margin definition.
Calculate and compare
Use ROAS alongside contribution and acquisition cost. Keep attribution assumptions with the result.
Choose the next test
Review the offer, conversion path or spend allocation. Change one decision with a defined review period.
How to review the result
Use the result to compare scenarios under the same assumptions. Returns, delayed purchases and incomplete attribution can change the picture. The example is a planning illustration, not evidence of client performance.
Tools, services and related solutions
ROAS Calculator · Contribution Margin Calculator · Digital Growth Services
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Content updated: October 11, 2026