Customer Acquisition CostCAC

By Federico Donatone · Updated October 15, 2026

Definition

Customer acquisition cost (CAC) is the total sales and marketing spend in a period divided by the number of new customers won in that period. It includes salaries, commissions, tools, agencies and ads, not just campaign budgets. CAC tells a company whether it can afford the way it grows.

How to calculate customer acquisition cost

FormulaCAC = Total sales and marketing cost in a period ÷ New customers won in the same periodFor example, if a quarter costs $180,000 in sales salaries, tools, agency fees and ads, and you sign 6 new customers, CAC is $180,000 ÷ 6 = $30,000 per customer.

Pick a period long enough to cover your sales cycle. When deals take months to close, this quarter's spend often produces next quarter's customers, so many teams use a trailing period or lag the cost by the length of the cycle.

Blended CAC divides all spend by all new customers. Channel CAC splits it by source (outbound, paid ads, partners, inbound) so you can see which motion pays for itself. Channel CAC needs a record of where each customer really came from.

What to include in CAC

Cost	Include?	Note
Sales and SDR salaries, commissions	Yes	Fully loaded, with benefits
Marketing team and paid media	Yes	Ads, events, content production
Sales and data tools	Yes	CRM, enrichment, sequencer, dialer
Agencies and contractors	Yes	Outbound, lead generation, consultants
Customer success after signing	No	Belongs to retention cost
Product and engineering	Usually no	Unless built only to acquire customers

From our workThe most common mistake we see is a CAC that only counts ad spend. It looks cheap, then the hiring plan breaks because salaries were the real cost.

Agency and outsourced SDR fees belong in CAC exactly like salaries. Comparing an in-house team's ad-only CAC with an agency's full fee makes the agency look expensive when it may be the cheaper option.

Why cost per meeting is not cost per customer

Outbound teams often track cost per booked meeting. It is a useful input, but every step between a booked meeting and a signed contract loses volume, so CAC is always far higher. Walk the same spend down the funnel:

Cost per booked meeting: spend ÷ meetings booked.
Cost per held meeting: spend ÷ meetings that took place.
Cost per qualified opportunity: spend ÷ opportunities sales accepted.
CAC: spend ÷ deals won.

14.6%of 1,380 B2B meetings booked by cold calling ended in a no-showSource: Growth Cab show rate study, 2024 to 2026

Those empty slots still cost SDR time, so cost per held meeting is always higher than cost per booked meeting. Our meeting show rate calculator estimates how many of the meetings you book will actually take place.

How to judge your own CAC

There is no universal good CAC. A cost that would sink a company selling small monthly plans can be healthy for one selling large multi-year contracts. Judge it against what a customer is worth to you, and against how long it takes to earn it back.

FormulaCAC payback (months) = CAC ÷ (Monthly recurring revenue per new customer × Gross margin)If CAC is $30,000, a new customer pays $5,000 a month and gross margin is 80%, payback is $30,000 ÷ ($5,000 × 0.8) = 7.5 months.

Compare CAC with customer lifetime value, measured in gross profit.
Watch the trend: CAC rising while win rate falls usually points to targeting or messaging, not budget.
Compare your own channels with each other, not with companies that sell at a different deal size.

Tool spend is part of CAC too. Our sales tech stack consolidation test shows how to cut overlapping tools without losing output.

Customer Acquisition Cost FAQ

What is the difference between CAC and cost per lead?

Cost per lead divides spend by the number of leads, whether or not they ever buy. CAC divides spend by customers actually won. A channel with cheap leads can have an expensive CAC if few of those leads turn into deals.

What is a good customer acquisition cost?

A good CAC is one your customers pay back with room to spare. Compare it with customer lifetime value and with the months of gross margin needed to recover it. The right level depends on your deal size, margin and cash, so a number from another company tells you little.

How do you reduce customer acquisition cost?

Narrow targeting so fewer deals are lost after expensive meetings, and keep the gap between booking and meeting short so more meetings take place. Raise win rate with better discovery, and cut tools that do the same job twice. Lower CAC from cheaper leads alone rarely lasts.

Related terms

Customer Lifetime ValueCustomer lifetime value (CLV, often called LTV) is an estimate of the total gross profit a company earns from one customer over the whole relationship, from first payment to cancellation. Subscription businesses usually calculate it from average revenue per account, gross margin and churn rate. It sets the ceiling on what you can spend to win a customer. LTV to CAC RatioThe LTV to CAC ratio compares customer lifetime value (the gross profit a customer brings over the relationship) with customer acquisition cost (the sales and marketing spend needed to win them). A ratio of 1 means you spend as much to win a customer as you earn from them. A higher ratio means each customer returns more than it cost. Show RateMeeting show rate is the percentage of booked sales meetings that actually take place. A related metric, the no-show rate, counts meetings the prospect did not attend. Teams that book B2B meetings track both to judge lead quality and booking habits, and to see how much of a full calendar turns into real sales conversations. Win RateWin rate is the percentage of sales opportunities that end in a won deal, out of all opportunities that reached a final outcome. It is calculated as deals won divided by deals won plus deals lost. Win rate shows how well a team qualifies and sells, and it is a core input to pipeline and revenue forecasts. Sales CycleA sales cycle is the series of stages a deal goes through from the first contact with a prospect to a signed contract, and the time that journey takes. In B2B, the sales cycle usually runs through prospecting, qualification, discovery, proposal, negotiation and close, and gets longer as deal size and the number of decision makers grow. Outbound SalesOutbound sales is a sales approach in which the seller starts the conversation, contacting potential buyers who have not asked to hear from the company. In B2B, outbound sales teams choose target accounts, find the decision makers, reach them by phone, email or LinkedIn, and turn the ones who fit into qualified meetings and pipeline.