What this calculator does
Most business & marketing tools bury the answer under ads and jargon. The cac calculator (customer acquisition cost) shows the number first, the breakdown next, and the assumptions in plain language.
The CAC Calculator gives you both the blended cost of acquiring a customer and the paid CAC that matters for ad-channel decisions. Blended is your board-level number; paid CAC is the number you optimize against LTV.
How to use the CAC Calculator (Customer Acquisition Cost)
- Add up all marketing spend for the period — ads, content, events, agencies.
- Enter fully-loaded sales cost (salary + commission + benefits + overhead).
- Include tools: CRM, marketing automation, attribution software.
- Count new customers, and split out the ones from paid channels.
The formula
blended_cac = (marketing + sales + tools) / new_customers; paid_cac = (marketing + tools) / paid_customers
Worked example
$20k marketing + $30k sales + $2.5k tools = $52,500 across 40 new customers → blended CAC $1,313. If 25 came from paid, paid CAC = $900.
Common mistakes
- Excluding sales team cost from blended CAC — it inflates efficiency artificially.
- Counting expansion revenue customers as 'new'.
- Averaging across too long a window — 3 months is usually the right lookback.
When to use it
Use monthly for growth reviews, before increasing ad budget, and any time you're calculating LTV:CAC or the CAC payback period.
Pro tips for the CAC Calculator (Customer Acquisition Cost)
- For big decisions, run best-case, expected, and worst-case scenarios and compare the breakdowns side by side.
- Copy the result to paste it directly into email, Notion, or a spreadsheet cell.
- Use Print / PDF to export a clean, ad-free summary you can share with a client or advisor.
Frequently asked questions
›What's a good LTV:CAC ratio?
3:1 is the SaaS benchmark. Below 1:1 you're losing money; above 5:1 you're probably under-investing in growth.
›Should I include content marketing?
Yes — treat content as marketing spend, and count organic sign-ups from content in the blended (not paid) denominator.
›How does CAC payback tie in?
CAC payback = CAC / (ARPA × gross margin). Under 12 months is healthy for SMB, under 24 for enterprise.
›Can I use this on mobile?
Yes — the cac calculator (customer acquisition cost) is fully responsive, and results, charts, and the share button all work on phones and tablets.
›Where does the formula come from?
The formula shown in the "How it works" section is the same one you'll find in standard business & marketing references — no proprietary tweaks or hidden weightings.
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