ROAS Versus Profit: Use Total Costs for an Ecommerce Campaign

ROAS is useful for comparing tracked revenue with advertising spend, but it is not a profit statement. A campaign can show a positive ROAS while the store loses money after product, fulfilment and operating costs. Make the unit economics visible before changing bids.

Calculate the platform ratio

ROAS equals attributed revenue divided by ad spend. In a clearly illustrative example, AED 10,000 in tracked revenue and AED 2,500 in media spend gives a ROAS of 4. This says nothing yet about the cost of goods, shipping subsidy, payment fees, returns or agency fees.

Move from revenue to contribution

Suppose the same illustrative sales carry AED 5,000 in product costs, AED 800 in fulfilment and payment costs, and AED 2,500 in ad spend. The remainder is AED 1,700 before other operating costs and returns. A different product mix could change that result even at the same ROAS. Use order data and actual margins rather than copying these sample values into a forecast.

Check the quality of attributed revenue

Validate purchase events and values against real orders, including refunds and duplicate events. Separate platform attribution from the store’s accounting view. Use the Megvi ROI calculator for a scenario, then revisit assumptions with actual product margins and verified costs.

Worked decision example

Illustrative product mix: two products generate the same AED 1,000 revenue but have different margins and return rates. If the ad platform reports one blended ROAS, it may hide that one item contributes much less to overhead after delivery and fees. Segment the economics where order data permits and decide whether a product group deserves a different bid or offer. The calculator is a scenario tool; accounting records determine the actual contribution.

Practical review checklist

• Is revenue verified against orders?
• Are product and fulfilment costs included?
• Does the decision use contribution, not ROAS alone?

Where to go next

advertising ROI calculator · Google Ads service · PPC measurement guide