Growth calculator

Break-Even CPC Calculator

Calculate the maximum paid search or paid social CPC you can afford while meeting CAC or profit targets.

Inputs

Defaults are visible and can be changed before calculation.

Inline validation messages appear here when a value needs to be corrected.

Currency *Applies to CPC, CAC, profit, and fixed-cost outputs.Visitor-to-lead rate *Percentage of paid clicks that become leads, such as 4%.Lead-to-customer rate *Percentage of leads that become customers.Gross profit per customer *Gross profit available from one acquired customer before acquisition costs.Target profit per customerProfit you want to keep after acquisition. Subtracted before calculating affordable CPC.Target CACOptional CAC ceiling. Leave at 0 to use available gross profit as the CAC ceiling.Refund rateExpected percentage of gross profit lost to refunds.Sales cost per customerSales, onboarding, or closing cost allocated per acquired customer.Agency cost allocation per customerAgency or management cost allocated to each acquired customer.Landing page fixed costOptional fixed page or creative cost spread across expected clicks.Expected clicksExpected paid clicks used to allocate fixed landing page cost per click.

Results

Results are deterministic scenario outputs, not guarantees.

Enter values and calculate to see the summary, supporting metrics, warnings, and interpretation.

Interpretation

Deterministic interpretation rules will explain what the modeled result means once a calculation is available.

Detailed breakdown

Intermediate calculation rows will appear here after calculation.

Formula

Visitor-to-customer conversion rate

visitorToCustomerRate = visitorToLeadRate × leadToCustomerRate

Gross profit available for acquisition

netGrossProfitPerCustomer = grossProfitPerCustomer × (1 - refundRate) - salesCostPerCustomer - agencyCostAllocationPerCustomer - targetProfitPerCustomer

Maximum CAC

maximumCAC = targetCAC > 0 ? min(targetCAC, netGrossProfitPerCustomer) : netGrossProfitPerCustomer

Maximum affordable CPC

maximumCPC = maximumCAC × visitorToCustomerRate - landingPageFixedCost / expectedClicks

Maximum cost per lead

maximumCostPerLead = maximumCAC × leadToCustomerRate

Assumptions

Percentages are entered as human-readable values such as 4% and converted to decimals internally.
Target CAC is optional; when entered, it caps the CAC ceiling before CPC is calculated.
Fixed landing page cost is allocated across expected clicks before calculating maximum CPC.
Outputs are deterministic planning scenarios, not forecasts or guarantees.

Worked example

Example: CPC ceiling from funnel economics

If 4% of visitors become leads, 20% of leads become customers, gross profit per customer is $1,000, and target profit is $200, then $800 of CAC room times a 0.8% visitor-to-customer rate gives $6.40 CPC room before fixed costs.

FAQ

What does break-even CPC mean?

It is the maximum cost per click that fits the conversion rates, customer-level margin, CAC target, and fixed-cost assumptions entered in the model.

How does target CAC affect the result?

When target CAC is entered, the calculator uses the lower of target CAC and gross profit available for acquisition so CPC does not exceed either constraint.

Why include landing page fixed cost?

A page, creative, or testing cost can consume part of the click-level margin. Spreading it across expected clicks makes that cost visible.

Related calculators

Paid Ads Budget Calculator Break-Even ROAS Calculator CAC Calculator

Want help interpreting the model?

Use this calculator as a deterministic planning tool, then talk with Propel Collective about which assumptions are worth validating first.

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