Attribution & Analytics
Break-Even CPA Explained for Shopify Stores
Break-even CPA is the maximum acquisition cost an order can absorb before the contribution profit you are measuring reaches zero.
Simple example
Product price: $100.
Product cost: $50.
Variable shipping/fees: $10.
Contribution before advertising = $40.
In that simplified example, a $40 CPA is break-even on the first order.
Add the costs that actually change per order
Depending on the business, include:
- cost of goods
- payment fees
- fulfilment
- shipping subsidy
- expected refunds/returns
- sales commission
- other variable costs
Fixed overhead is usually handled separately, but your target CPA must still leave enough contribution to support the business.
Break-even CPA is not target CPA
If you acquire every customer at exact break-even and they never buy again, advertising creates no first-order contribution. Set an allowable CPA below break-even unless lifetime value justifies spending more.
Use new-customer economics
Returning customer orders can make blended CPA look better. For acquisition decisions, calculate what you can afford to pay specifically for a new customer.
Need the real economics laid out?
If your team uses a CPA target that was guessed rather than calculated, contact us. We can build the target from your actual Shopify economics.