What Is a Good ROAS for Your Profit Margin?

Calculate the contribution left before ads, reserve the profit required per order, and divide net revenue by the remaining allowable acquisition cost. A high-margin store can profit below a ratio that would lose money for a low-margin store.

Good target ROAS = net revenue / (contribution before ads - retained profit)

Tradeoff: Raising a target can protect unit economics while reducing reach or volume. The formula establishes the business requirement; it does not promise an ad platform can deliver that ratio at the intended spend.

Each illustrative scenario uses a $100 net order, 3% fees, a 5% returns and discounts allowance, and a $15 retained-profit goal. Only gross margin changes.

These are not sector averages. They show how the same revenue target changes when the cost structure changes.

• Revenue basis: Confirm the attributed conversion value resembles the net revenue used in the model.
• Cost coverage: Include product, fulfillment, fees, returns, and other variable order costs.
• New versus repeat customers: Do not use blended repeat-purchase revenue to justify an acquisition target without a cohort view.
• Data maturity: Allow recent conversions, cancellations, and refunds to settle.
• Scale: Compare total contribution, not just the highest ratio; a lower ROAS can create more profit at greater volume.

Amazon Ads describes ROAS as attributed revenue divided by ad spend. Shopify profit reports provide product-cost and margin context. The target method and scenarios above are ROAS Break modeling choices, documented in the methodology.

• Amazon Ads ROAS guideROAS definition and interpretation. Checked August 20, 2026.
• Shopify profit reportsProduct cost and profit reporting. Checked August 20, 2026.