ROAS, break-even ROAS and what they leave out

Return on ad spend (ROAS) is revenue attributed to ads divided by what you spent on those ads:

ROAS = attributed revenue ÷ ad spend

Spend $2,500 and record $12,500 in sales from the campaign, and ROAS is 5.00, often written 5× or 500 %.

ROAS is not profit

A 5× ROAS sounds excellent, but the $12,500 is revenue. It still has to pay for the products, payment fees, shipping, returns and everything else. Whether 5× is good depends entirely on your margins.

Break-even ROAS

The ROAS at which ads exactly pay for themselves depends on how much of each sale is left after variable costs, known as the contribution margin:

break-even ROAS = 1 ÷ contribution margin

Example: you sell a product for $50. Product cost is $20, payment and platform fees $3 and shipping $7. That leaves $20 per order, a 40 % contribution margin. Break-even ROAS is 1 ÷ 0.40 = 2.50. Below 2.5×, every sale from ads loses money; above it, ads contribute profit.

The same numbers give the maximum cost per acquisition: you can spend up to $20 in ads per order before losing money. The break-even ROAS calculator works this out from your costs.

Comparing campaigns fairly

When comparing several campaigns, add up all revenue and all spend before dividing. Averaging the individual ROAS figures gives a small test campaign the same weight as your main one. For example, a campaign with $1,000 revenue on $100 spend (10×) and one with $1,000 on $900 (1.1×) together have ROAS 2,000 ÷ 1,000 = 2.0×, not the 5.6× average.

What ROAS leaves out

• Attribution. Platforms count conversions differently (click windows, view-through). Two dashboards can report different ROAS for the same sales.
• Fixed costs. Salaries, software and rent are not variable costs, so break-even ROAS does not cover them. For those, see the business break-even calculator.
• Refunds and repeat purchases. Returns lower real revenue; repeat customers raise it later than the dashboard shows.

For a complete per-order picture, the order-profit calculator subtracts fees, shipping, refunds and ad cost per order.