Break-Even CPC Calculator
The most a click can cost before an ad loses money, from order value, gross margin and conversion rate — and the lower figure that leaves a target margin.
Each click is worth the profit of an order multiplied by the chance the click becomes one.
How the break-even cpc calculator works
Each click is worth the profit of an order multiplied by the chance the click becomes one. Pay more than that and every order costs more than it earns; that is the break-even cost per click.
Break-even is not a target. Keeping a share of revenue as profit means bidding below it; enter that share and the calculator gives the maximum bid that still leaves it, and the return on ad spend each figure implies.
Formula: break-even CPC = AOV × gross margin × conversion rate; at a target margin: AOV × (gross margin − target) × conversion rate
Worked examples
| Inputs | Break-even cost per click | Note |
|---|---|---|
| Retail keyword | $0.80 | 32 profit × 2.5% = 0.80; keep 10% → 0.60 |
| High-ticket, low conversion | $1.68 | 210 × 0.8% = 1.68 |
| No margin kept | $0.99 | 24.75 × 4% = 0.99 |
FAQFrequently asked questions
Why gross margin and not revenue?
A click can only be paid for out of what the order earns after the goods and their direct costs. Using revenue would suggest bidding up to the whole order value and losing the cost of goods on every sale.
What is a break-even ROAS?
The return on ad spend at which ads exactly cover themselves: revenue divided by spend equal to one over the gross margin. At a 40% margin that is 2.5 — every unit of spend must return 2.5 in revenue just to break even, and more to leave a profit.
Should I include repeat purchases?
For a first-order bid, only if you are confident of them. Some advertisers use lifetime gross profit instead of one order and accept a loss on the first sale; that is a deliberate choice about payback, and the calculator will follow whichever order value you enter.
Does the conversion rate include all clicks?
Use the conversion rate of the traffic the bid buys — the campaign or keyword, not the site average. Branded searches convert far better than generic ones and would overstate what a generic click is worth.
Where these figures come from
- APICS / ASCM — inventory management terminology — the turnover, safety stock and reorder point definitions used here
- Australian Competition and Consumer Commission — the Australian consumer law regulator
Last checked: September 2026. These are standard retail and inventory-management definitions.