Hustlay
Free SaaS tool

Is your customer acquisition cost sustainable?

Enter your spend and new customers to get CAC. Add lifetime value to see your LTV:CAC ratio — the number that tells you if growth is actually profitable.

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This period
$
Ad spend + sales/marketing salaries + tools
$
Use the LTV calculator if you don't have this yet
$
%
Your numbers
CAC
$100.00
LTV : CAC
4.5 : 1
Payback
3.2 mo
Healthy (4.5:1).
Solid unit economics. You likely have room to invest more in acquisition and still be profitable.
How it's calculated

CAC = sales & marketing spend ÷ new customers

Worked example
$5,000 spent on ads and sales tools this month, 50 new customers acquired: CAC = $5,000 ÷ 50 = $100 per customer. If each customer is worth $450 over their lifetime, the ratio is 4.5 : 1 — healthy.
CAC only makes sense next to LTV
A $100 CAC is great if the customer is worth $1,000 — and terrible if they're worth $80. CAC alone is a vanity number; always pair it with lifetime value.
FAQ

Common questions about CAC

Customer Acquisition Cost — the fully-loaded cost of acquiring one new customer. CAC = total sales & marketing spend ÷ new customers acquired in that period. Include ad spend, sales salaries, commissions, tools, and content costs tied to acquisition — not just ad spend alone.
Related free tools:
LTV calculator →Churn rate calculator →MRR & ARR calculator →
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