Formula
Example
€5,000 ÷ €1,000 = 5.0 = 500%
Illustrative calculation, not a client result. Attributed value is not profit; 5.0 and 500% express the same ROAS.
Why it matters
It supports advertising decisions when value is measured correctly. A business decision also needs margin, other costs, measurement quality and the attribution model.
How it works
Divide reported advertising value by advertising spend for a comparable period. If the value represents revenue, ROAS measures revenue relative to advertising, not profit. Target ROAS is a bidding objective, distinct from the achieved result.
Example
Example: €5,000 in reported value and €1,000 in advertising spend produce ROAS of 5.0, or 500%. These numbers are illustrative.
Common mistakes
Do not equate ROAS with ROI or profit. Do not set a universal good ROAS without understanding business economics. Inaccurate tracking or different attribution can change the reported ratio.
How can you check this in practice?
Align recorded conversion value and cost within one scope. €5,000 value over €1,000 spend is 5.0 or 500%. Check returns, currency and attribution window; recent days may not yet include delayed conversions.
Distinctions and limitations
ROAS compares advertising value with ad spend; ROI considers return against defined investment costs. ROAS of 5 is not profit of 5. Product margin, fulfilment, shipping and returns can change the business interpretation.
Margin and break-even context
In a simplified model, 25% contribution margin before advertising implies break-even ROAS 4: 1÷0.25. This includes relevant variable costs and is not a universal target. Product mix, returns and fixed costs can change evaluation.
ROAS and CPA
With equal CPA, two campaigns can have different order values. CPA €20 on a €40 order versus a €200 order does not describe the same value-to-cost relationship. Even higher ROAS may be unsuitable with a lower contribution margin.
Official sources
Editorial responsibility: Biser Bozhinov · PPC Specialist
Updated: 05/11/2026
For a correction or question: office@z-consult.bg