How to Use the Search Ad Breakeven Bid Calculator
To avoid losing money on search ads, your cost per click must stay below a certain threshold. Max CPC = AOV × Profit Margin × Conversion Rate. Bidding above this limit means each click costs more than the profit it generates.
Example: $100 AOV, 40% margin, 2% CVR → Max CPC = $100 × 0.4 × 0.02 = $0.80. If your current CPC is $1.20, you're overspending by $0.40 per click. The required Target ROAS would be 125x, meaning you need $125 in revenue for every $1 spent on ads.
Enter your current CPC to instantly see how much room you have before hitting the breakeven limit. Use the Target ROAS value in Google Ads or Microsoft Ads Smart Bidding to automate profitable bidding.
Frequently Asked Questions
Profit Margin = (Sale Price − COGS) ÷ Sale Price × 100. Include all variable costs: product cost, shipping, payment processing fees, returns, and customer support overhead. Use the true blended margin, not just product markup.
Set up conversion tracking in Google Ads or your analytics platform. Without data, use an industry average (typically 1–3% for e-commerce). Update the calculation as real data accumulates for a more accurate Max CPC.