Customer Acquisition Cost Calculator

Measure paid and blended CAC so your growth targets stay profitable.

Methodology & standardsRuns on your devicePaid CAC = Ad Spend / New Customers | Blended CAC = (Ad Spend + Payroll + Agency Fees) / New Customers

Inputs

Results update live

Presets:

Ad spend

Total performance media spend for the period.

New customers acquired

Only first-time customers from that same period.

Marketing payroll allocationAdvanced

Premium: include internal team cost tied to acquisition.

Agency and software feesAdvanced

Premium: include agency retainers and ad tooling costs.

Gross profit per first orderAdvanced

Premium: used to estimate how many orders are needed to recover CAC.

Scenario workspace

Save scenarios and compare outcomes. Local autosave stays on by default for quick planning.

Free Core: 1 saved scenario per tool.

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No saved scenarios yet. Save your current assumptions to compare results over time.

Scenario	Plan	Paid CAC	Customers per $10k spend
Current session	Free	$20.00	500.0

When to use this tool

Before increasing ad budget to check if customer acquisition can scale without margin collapse.
During channel reviews to compare acquisition efficiency across campaigns or agencies.
Before hiring or retainers to understand true blended acquisition cost.

Growth quality check

CAC only matters when you compare it with payback and lifetime value

Customer acquisition cost shows what it costs to win a new customer. The decision comes from comparing CAC against gross margin, payback period, retention, and the expected value of future orders.

Trust note: CAC is an operating estimate. Keep channel-level tracking clean so blended averages do not hide weak acquisition economics.

Reference points

Shopify help center Google Analytics help

Calculate ROAS Check customer lifetime value Find payback period

Methodology

Include all campaign spend, creative costs, sales costs, and tool costs tied to acquisition.
Divide total acquisition cost by new customers, not total orders or leads.
Compare CAC against contribution margin and repeat purchase behaviour before increasing spend.

Practical examples

$6,000 acquisition spend and 300 new customers gives a CAC of $20.
If first-order contribution profit is $12, the customer must repeat or upsell to repay CAC.
A higher CAC can be acceptable when retention, subscriptions, or repeat purchases are strong.

Common mistakes to avoid

Do not divide acquisition cost by all customers if existing customers also bought during the period.
Do not ignore agency fees, influencer fees, creative production, or sales commissions.
Do not scale paid acquisition without knowing payback timing.

FAQ

Frequently asked questions

How the calculation works and where its limits are.

What is the difference between paid CAC and blended CAC?

Paid CAC only includes media spend, while blended CAC adds team and tooling costs so you see true acquisition efficiency.

Why does blended CAC matter for scaling?

Blended CAC shows whether your growth model still works after all acquisition overhead, not just ad platform spend.

How do I lower CAC without hurting growth?

Improve conversion rate, increase repeat purchase rate, and tighten targeting before simply increasing bids.