Break-Even ROAS per SKU

Break-even ROAS is the return on ad spend at which the advertising on a product neither makes nor loses money. It equals 1 divided by the product's contribution margin before ad spend. Calculated per SKU, it shows the lowest ROAS each product can accept before its ads start losing money.

• Formula: Break-even ROAS = 1 / contribution margin before ad spend.
• Contribution margin: The share of the selling price left after product, fees, delivery and returns, before any advertising.
• Per SKU: Each product has its own costs, so each has its own break-even ROAS.
• Rule: A campaign whose ROAS stays below the product's break-even number loses money on those sales.
• Target ROAS: Usually set above break-even, so the brand keeps some profit.

This lesson follows one example: a namkeen brand from Indore that sells Ratlami sev, a festive gift box and a small 100 g trial pack on its website and on Amazon. Its ads report a healthy ROAS overall, yet the owner suspects some products lose money. Working out break-even ROAS for each product shows exactly which ones.

Key Characteristics of Break-Even ROAS

• Built on contribution margin: It uses only the costs that rise with each additional sale, called variable costs, not rent or salaries.
• Specific to each product: Price and cost differ by SKU, so a single store-wide number hides losses.
• A floor, not a goal: It marks zero contribution after ad costs; the actual target should usually sit higher.
• Changes with price: Any discount lowers the margin and raises break-even ROAS, which matters most during sale events.
• Linked to ACoS: Break-even ACoS equals the contribution margin, as explained in ROAS vs ACoS vs TACoS.

How Break-Even ROAS Works

1. Start from the selling price after GST: Use the amount the business actually retains from each unit, because the GST portion is collected on behalf of the government.
2. Subtract variable costs: Deduct product cost, marketplace commission, payment gateway charges, packaging, delivery and a realistic allowance for returns.
3. Calculate the contribution: Whatever remains per unit is the contribution available before any advertising expense.
4. Convert it into a margin: Divide the contribution by the selling price, which gives the contribution margin as a decimal.
5. Calculate break-even ROAS: Divide 1 by that margin, and the result is the ROAS at which advertising costs exactly equal the contribution from advertised sales.

For the Ratlami sev, the price after GST is ₹200, while product cost is ₹80, fees with the returns allowance come to ₹40, and delivery with packing costs ₹30. The contribution is therefore ₹50, the contribution margin is 50 divided by 200, or 25 percent, and the break-even ROAS is 1 divided by 0.25, which equals 4.0.

Example: Break-Even ROAS for an Indore Namkeen Brand

These figures are the brand's own illustrative numbers, not industry averages. To verify the sev result, imagine the brand spends ₹1,000 on advertising at a ROAS of exactly 4: advertised sales reach ₹4,000, which is 20 packs contributing ₹1,000, exactly matching the advertising cost. At a ROAS of 5, sales of ₹5,000 mean 25 packs contributing ₹1,250, leaving ₹250 after advertising, while at a ROAS of 3, sales of ₹3,000 mean 15 packs contributing ₹750, a loss of ₹250.

The table changes the owner's plans. The gift box can accept a ROAS as low as about 2.67, so it deserves more budget before Diwali. The trial pack needs a ROAS of 10 just to break even, which is rare, so it should be sold mainly as an add-on or used deliberately to win new customers who are expected to reorder. The Amazon Ads tutorial shows how to split these products into separate campaigns with separate targets.

To keep a profit of ₹20 per sev pack, the brand can spend at most ₹30 per pack on ads, so its target ROAS is 200 divided by 30, which is about 6.67.

Benefits of Knowing Break-Even ROAS

• Clear decisions: Every campaign can be judged against a real floor rather than a vague idea of a good ROAS.
• Better budget split: Money moves toward products with room to spend, like the gift box.
• Safer sale events: Recalculating with sale prices shows which discounts cannot support advertising.
• Common language: Founders, agencies and marketplace managers can agree on one number per product, which also supports D2C marketing planning.

Limitations of Break-Even ROAS

• Ignores repeat purchases: A customer who reorders several times may justify a first order bought below break-even.
• Depends on accurate costs: Missing costs, such as returns or payment fees, make the number look better than reality.
• Platform ROAS is not always true ROAS: Ad platforms credit themselves for some sales that would have happened anyway, as described in what is ROAS.
• Fixed costs are left out: Covering break-even on ads does not mean the whole business is profitable.

How AI Changes Break-Even ROAS

What AI Automates Now

Ad platforms' automated bidding, such as target ROAS strategies, can aim for a ROAS figure you set, and AI assistants can build a per-SKU margin sheet from exported cost data in minutes. Some platforms can also optimise toward profit values when a brand sends margin data.

What Still Needs a Human

Only the business knows its true costs, return rates and whether a low-margin product is worth selling at a loss to win new customers. A person must supply the correct costs, choose targets above break-even, and update them whenever prices, fees or discounts change.

Risk to Watch

If a brand feeds automated bidding a target ROAS below the true break-even, the system will spend efficiently toward a loss. AI tools can also make arithmetic mistakes in long tables, so check every formula.

Do It with AI

Use this prompt to build a break-even ROAS table from your own costs; it works in ChatGPT, Claude or Gemini.

1. Collect real costs for each SKU from invoices, marketplace fee statements and delivery bills.
2. Run the prompt and check two products by hand with a calculator.
3. Put each product's break-even and target ROAS into your campaign sheet.
4. Recalculate before every sale event with the discounted prices.

Check Before You Use It

• Facts: Match every cost with a statement or invoice, and recheck the arithmetic yourself.
• Brand fit: Decide deliberately which products you are willing to advertise at a loss for new customers.
• Compliance: Use the price after GST, and keep margin data private when using AI tools under your company's data policy.