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The formula: Cost Per Conversion = Total Spend ÷ Conversions. All figures are estimates for planning purposes.
ROAS
5.00×
Profit Margin
80.00%
Revenue, profit, ROI, and ROAS require an average value per conversion.
A ROAS above 1× means revenue exceeds ad spend before other costs.
Lowering cost per conversion lifts profit even when spend stays the same.
Cost per conversion is the truest measure of paid-media efficiency. Here's what it means and how to improve it.
Cost per conversion is the average spend to earn one tracked action — a sale, lead, or sign-up. Unlike cost per click, it reflects whether traffic actually does what you want.
CPC is cost per click, CPL is cost per lead, and CPA (cost per acquisition) is cost per customer. Cost per conversion can mean any of the action-based ones depending on your goal.
Raise conversion rate with better targeting, copy, and landing pages; cut wasted spend on low-intent keywords and audiences; and let conversion bidding optimize toward results.
Cost per conversion is inversely tied to conversion rate. Doubling your conversion rate roughly halves your cost per conversion — often the highest-leverage lever you have.
Feeding conversion values back to platforms lets algorithms bid more for high-value conversions and less for low-value ones, improving ROI beyond a flat cost-per-conversion target.
Search typically delivers lower cost per conversion than display or top-of-funnel social. Always judge against the profit a conversion generates, not an industry average.
Your cost per conversion only means something next to what a conversion is worth.
Cost per conversion is the cleanest efficiency metric in paid media: total spend divided by the number of conversions it produced. Its weakness is that a 'conversion' can mean almost anything — a purchase, a form fill, a phone call, a newsletter signup — and those are worth wildly different amounts. Two accounts reporting an identical $40 cost per conversion can be one thriving and one quietly failing.
Before benchmarking, write down what one conversion is actually worth to you: the average order value or the average deal value multiplied by the rate at which those conversions close. That number, not an industry average, is the ceiling you must stay under.
| Sector | Cost per conversion (CAD) | What the conversion usually is |
|---|---|---|
| E-commerce | $15 – $60 | A completed purchase. Judge against average order value and margin. |
| Home services | $45 – $160 | A call or booking request. High close rates justify the higher cost. |
| Dental / medical | $60 – $220 | A new-patient enquiry. Lifetime value is what makes this work. |
| Legal | $150 – $700 | A consultation request. Very high case value absorbs very high cost. |
| B2B / SaaS | $80 – $400 | A demo request or trial. Only meaningful alongside lead-to-close rate. |
| Automotive | $40 – $150 | A lead form or test drive booking. Gross per unit sets the ceiling. |
Ranges reflect Google Search in competitive Canadian metros. Meta typically produces cheaper conversions of lower intent, which is why comparing the two on cost per conversion alone is misleading.
If your account counts newsletter signups and purchases as the same conversion, your cost per conversion is an average of two unrelated things. Separate them or the number is meaningless.
Your maximum sustainable cost per conversion is gross profit per sale multiplied by the rate at which conversions become sales. Anything above that loses money on every unit.
Cost per conversion almost always rises with spend, because the cheapest demand is captured first. Judge scaling decisions on the marginal cost, not the account average.
A seven-day window and a thirty-day window will report materially different costs for identical performance. Fix the window before comparing periods.
Cost per conversion counts leads, not customers. A campaign with a cheap cost per lead and a terrible close rate looks best on this metric and worst on the bank statement.
For service businesses, most conversions are phone calls. Without call tracking, a large share of conversions goes uncounted and your reported cost is inflated.
You can always lower cost per conversion by counting easier actions. If the fix makes the number better and the revenue worse, it is not a fix.
Meta conversions are typically cheaper and colder than Search conversions. Compare cost per closed customer, or you will defund the channel that is actually producing revenue.
A visitor who submits a form and then calls can register two conversions. Deduplicate, or your cost will look roughly half what it really is.
A large share of paid leads are lost to slow response, not bad targeting. Improving speed-to-lead often beats any bid change available in the account.
If your cost per conversion is above what a conversion is worth, resist the instinct to cut budget first. The usual causes are broken tracking, a landing page that does not match the ad, and untriaged search terms — all of which are cheaper to fix than lost volume is to replace.
We build and optimize paid campaigns that lower CPA and grow profit for businesses across Canada. No long-term contracts.