Start with the decision, not a single CAC number

Start with three decisions, not a single kitchenware customer acquisition cost in Canada. Use blended CAC to set the overall acquisition budget: total acquisition spend divided by total new customers. It gives a store-wide view, regardless of which channel receives credit. Use channel CAC for allocation decisions: a channel’s spend divided by the new customers assigned to it under your attribution rule. It shows where efficiency differs, but it is not directly comparable across channels if attribution rules differ.

Use allowable CAC for offer and economics decisions. This is the maximum acquisition cost a new customer can support under your chosen profit assumptions. When a discount, bundle or shipping offer changes the economics, recalculate the allowable CAC rather than treating the old limit as fixed. Compare each observed CAC with that limit. A CAC calculator can structure the calculation, while Canadian market guidance provides relevant context.

Choose the CAC measure that matches the decision
MeasureWhat it answersUse it to act on
Blended CACWhat did acquiring each new customer cost overall?Set the total acquisition budget
Channel CACWhat did each channel cost per credited new customer?Shift, reduce or test channel spend
Allowable CACWhat is the highest acquisition cost the offer can support?Change offers or stop uneconomic acquisition

What belongs in acquisition cost

Customer acquisition cost should include costs incurred to win a new customer, not every cost attached to the order. Include paid media, ad-platform charges, creative production and testing, agency or contractor fees, and attributable incentives such as a first-order discount, referral reward or acquisition-only gift. Allocate shared creative, agency and platform costs across the period or campaigns they support, then use the same rule every time. A CAC calculator can help keep that numerator consistent.

Keep fulfilment separate: pick-and-pack, postage, delivery, duties and other costs required to get the order to the customer belong in order economics. Product cost also stays outside CAC; it is the cost of the goods sold, not the cost of finding the buyer. Retention spend, email, SMS, loyalty rewards and campaigns aimed at existing customers, should not enter new-customer CAC unless a clearly identifiable portion targets acquisition.

The practical test is intent: if the cost would remain when acquisition stopped, it is probably not acquisition cost. If it supports both new and existing customers, allocate it using a documented basis rather than assigning the full amount to CAC. This keeps CAC comparable with first-order contribution and prevents fulfilment or repeat-purchase activity from making acquisition appear more or less efficient than it is.

Worked example with sample numbers

This example is illustrative. It uses sample numbers for a kitchenware store selling in Canada. They are made up to show the method, they are not a benchmark, and your own figures will differ.

Formula: Ceiling = margin per order x orders per customer / target ratio.

Sample numbers: the most you can pay for a customer
Orders per customerMargin earnedCeiling at a 3:1 target
1.0C$52.81C$17.60
1.5C$79.22C$26.41
2.0C$105.62C$35.21
3.0C$158.44C$52.81

Run the same sum with your own numbers in the free calculator, or browse guides for sellers in Canada and more kitchenware guides.

General information only: tax, duty and import rules change and depend on your situation, so check with an accountant or the official source before acting.

Eligible Shopify stores can see these numbers for their own store through the Founding 10,000 offer.

First-order margin sets the ceiling

First-order contribution sets the maximum you can spend to acquire a customer without losing money on that order. Calculate realized revenue from the delivered order after discounts and any sales tax collected, then subtract product cost, payment processing, fulfilment, the merchant-paid share of shipping, and other variable costs such as packaging or marketplace fees. The result is the contribution available to fund acquisition.

Allowable CAC equals that contribution at first-order break-even. If the order contributes $24 before acquisition, a $24 CAC leaves no first-order profit; a $15 CAC leaves $9. Treat the ceiling as a limit, not a target: set it lower if the store needs first-order profit or must absorb measurement error. Use the CAC calculator to test the inputs. A blended CAC tells you what acquisition is costing across the store; allowable CAC tells you what a new order can economically support. ORVX can calculate product costs and margins, then report contribution after advertising by product and collection, so high-revenue orders are not mistaken for profitable ones.

How repeat orders change the limit

A repeat-order assumption can raise your planning limit, but it should not be treated as realized customer value. Suppose the first order contributes $24 after product, fulfilment and variable costs. If 40% of new customers place a second order and that order contributes $20, its expected contribution is $8 (0.40 × $20). A planning CAC limit could therefore be $32, before allowing for uncertainty, refunds and the time required to receive that second order.

That $32 is a modelled ceiling, not proof that each acquired customer is worth $32. Validate it with cohorts: compare customers acquired in the same period, measure their delivered repeat revenue and contribution, and update the repeat rate as evidence accumulates. ORVX shows customer-level profitability and repeat behaviour, so you can compare the assumption with observed results. The CAC calculator can help document the assumptions.

Payback should control spend when cash is tight, inventory is constrained, or repeat purchases arrive slowly. If you cannot fund the gap until order two, cap acquisition at the contribution available from order one, or require a defined payback period. Use the higher lifetime planning limit only when cohort evidence and cash capacity support it.

Read the worked example correctly

Read the worked example as a sequence, not as a benchmark for every Canadian kitchenware store. First, verify the inputs: province and tax treatment, delivered order revenue, discounts, refunds or returns, product cost, fulfilment and other included variable costs, new-customer count, and acquisition spend. Each must use the same period and currency. If the example uses a GST/HST adjustment, confirm that the rate matches the customer’s province; the Canada Revenue Agency publishes the applicable rates.

Then follow the margin bridge line by line. Start with realized revenue, subtract the costs included in the example, and confirm the resulting first-order contribution. That contribution is the maximum CAC the first order can support before it becomes unprofitable. If the example also shows a repeat-order assumption, keep that result labelled as a planning limit rather than realized first-order performance.

Finally, compare the calculated limit with actual CAC on the same basis. Actual CAC below the limit leaves contribution after acquisition; actual CAC above it indicates that the acquisition economics need attention. Use the CAC calculator to reproduce the arithmetic without changing the example’s assumptions.

Track the number by channel

Use blended CAC to judge the total acquisition budget, and channel CAC to decide where the next dollar deserves testing. Channel CAC is channel-attributed acquisition spend divided by the new customers credited to that channel; blended CAC uses total acquisition spend divided by all new customers. A channel can show an attractive CAC while the store’s blended result worsens if it takes credit for customers who would have purchased anyway.

Apply the same rules to every channel: identical date range, customer definition, currency, spend treatment and delivered-order revenue basis. Treat platform attribution as directional, not as incremental proof. Compare it with MER, total advertising spend against total store revenue, and inspect repeat behaviour and customer-level profitability before scaling. Scale when channel CAC remains below the channel’s allowable limit and incremental results hold across a consistent period. Test when volume or attribution confidence is limited; pause when CAC exceeds the limit and contribution or repeat value does not compensate. ORVX reports MER and attributed ROAS separately, bringing ad spend beside Shopify orders so both views can be checked against the same store data.

Use each CAC view for the decision it can support
MeasureUse it forMain limitation
Blended CACSet the overall acquisition budgetDoes not identify which channel caused the result
Channel CACAllocate testing and scaling decisionsDepends on each platform’s attribution rules
MERCheck total advertising efficiencyDoes not assign revenue to a channel

Sources

How this page was made: drafted with AI from a brief, then checked by automated rules for arithmetic, sources and duplication. The sample numbers were calculated, not reported.