Break-even ROAS: calculate what remains after ad costs

1. Put revenue and costs on the same basis

ROAS compares revenue attributed to advertising with advertising costs. It is a revenue efficiency ratio, not a profit margin. Specify whether you are using platform-attributed revenue or your store’s total revenue; do not quietly mix the two.

Sources: Shopify — Return on ad spend

• Use one reporting period and one currency.
• Subtract discounts and refunds from the sales basis you analyze.
• Separate taxes collected for remittance from revenue you retain. Follow your accountant’s treatment for your market.
• Include product costs, fulfillment, shipping you fund, payment fees and expected return costs.
• Avoid deducting the same refund twice: once from revenue and again as a full refund cost.

2. Work through a complete contribution example

The figures below are a hypothetical monthly scenario, not customer results. Revenue has already been adjusted for discounts, refunded sales and collected sales taxes. The return-cost line covers extra handling and non-recovered shipping, not the refunded revenue again.

Contribution before ads = net revenue − variable non-ad costs
Contribution after ads = contribution before ads − ad spend
Break-even ROAS = net revenue ÷ contribution before ads
Example: 10,000 ÷ 4,500 = 2.22×

3. Set a target above advertising break-even

At 2.22× in this scenario, all $4,500 of contribution goes to ads. The business still has salaries, software, rent or other fixed overhead. Advertising break-even is therefore not the same as business break-even.

Suppose you need to retain $2,000 after ads for overhead and your desired surplus. Your ad budget ceiling at this revenue level is $4,500 − $2,000 = $2,500. The corresponding revenue-to-ad-spend target is $10,000 ÷ $2,500 = 4×. This is a planning constraint at the assumed sales and cost mix, not a prediction that more spend will scale linearly.

If contribution before ads is zero or negative, no finite positive ROAS solves those unit economics without changing the offer or costs.

4. Separate store economics from platform attribution

The example uses total net store revenue divided by total ad spend, often called a blended revenue-to-spend ratio or MER. A platform ROAS uses that platform’s attributed revenue. Different attribution windows can make the two disagree without either arithmetic being wrong.

Do not sum the revenue credited by Meta, Google and email and treat it as store sales. Multiple systems can claim the same order. Reconcile the overall business against actual orders, then use platform reporting to help diagnose campaigns. Keep the definition visible next to every ratio.

5. Turn the calculation into a weekly routine

Maintain costs per product or order type rather than using one permanent margin for the whole store. A bundle, a heavily discounted order and a repeat subscription can have different economics. Review refunds after enough time has passed, because early revenue can overstate the eventual margin.

EcomTrackr’s My Store currently provides setup guidance and a manual calculation workflow. Automated Shopify inventory, complete cost reconciliation and live Meta account reporting require connected services; do not treat manual entries as synchronized financial records. Use this example with your own verified figures.

Common questions