Target CPA Calculator

Estimate how much you can spend to acquire an order while retaining a target contribution. This is a planning ceiling you set from your own economics.

Find your acquisition ceiling

Target CPA = net order value − variable costs − desired contribution. A negative result means the order cannot support paid acquisition at that target.

Use the share of qualified leads that eventually buy. The lead ceiling assumes sales handling costs are already accounted for.

Enter figures per order

Net order value: Start with the amount you retain as revenue after expected discounts and refunds. Use the same product or customer segment for every input.
Variable costs: Include the costs that rise when another order is fulfilled, such as product cost, packing, fees, and shipping you pay. Avoid subtracting a discount twice.
Target contribution: Enter the amount you want left after acquisition to support overhead or profit. Zero shows first-order break-even.

Example: from order CPA to lead cost

A $95 order with $37 in variable costs and an $18 target leaves a $40 CPA ceiling. If 25% of qualified leads eventually buy, that supports $10 per qualified lead before sales handling costs. If just 15% buy, the same order economics support $6 per lead.

Use the ceiling alongside a volume target

Compare the ceiling with your realized acquisition cost on mature cohorts, then estimate whether the channel can deliver sufficient volume. A $40 ceiling can be viable at ten orders and hard to maintain at a hundred. Recalculate after a promotion changes pricing or fulfillment costs.

What if there is no affordable CPA?

A negative result means that the first order misses the desired contribution before acquisition. Test whether price, unit costs, or the target can change. If you want to count future purchases, build a separate scenario from observed repeat contribution and include the time it takes to collect it.