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Free break-even ROAS calculator

What can an order
afford to spend on ads?

Start with your order revenue and costs. See your break-even threshold, then add a profit target to plan the next step.

No email required. Your figures stay in your browser.

Your figures

Use pounds and a consistent basis for every field. Zero means that cost does not apply.

After discounts and refunds, using the same order count as your costs. Include customer delivery charges if you include the matching delivery costs.
Your average cost of goods sold, including inbound freight. Account consistently for recovered stock after returns.
Average fulfilment and return-handling costs per order. Do not deduct refunded revenue again here.
Average transaction, marketplace and other variable selling fees per order, where applicable.
Overheads & profit target
Optional: fixed costs for the period divided by the same order count. This allocation changes when order volume changes.
Optional: the amount you want left after the entered costs and advertising. This is a target, not a guarantee.

How the calculation works

Break-even CPA = order revenue − product costs − fulfilment costs − selling fees − allocated overheads.

Break-even ROAS = order revenue ÷ break-even CPA. For your profit target, we subtract your desired profit from the CPA allowance before calculating target ROAS.

Compare like with like

If you are VAT registered, exclude VAT from revenue and recoverable VAT from costs. Otherwise, use the revenue you retain and the costs you actually bear, including non-recoverable VAT. Use the same order population and period for every average.

This model treats each order as carrying the entered advertising cost. It does not include future repeat purchases, or infer how many orders your ads caused. A blended store calculation is not automatically a campaign target.

Check the revenue basis before comparing this result with Google Ads or Meta: platform conversion values may include VAT, shipping or orders later refunded. The calculator does not combine platform ROAS figures or validate your tracking.

When there is no room for advertising

If costs meet or exceed revenue, there is no positive CPA allowance. The calculator shows this explicitly instead of displaying a misleading negative or infinite ROAS.

Figures are estimates from your inputs, rounded for display. They do not guarantee profit. Cost changes, attribution and the mix of products sold can change the threshold.

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