# Customer Acquisition Cost (CAC)

> The fully loaded cost of winning one new customer.

- Type: Calculator: Cost to win one new customer
- Tags: Metrics, GTM
- Growth levers: Acquisition (primary), also Revenue
- ~876 words

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**CAC Calculator.** Fully loaded cost to acquire one new customer. Inputs: Sales + marketing spend, New customers won. Outputs: Customer acquisition cost.

Customer acquisition cost (CAC) is what you spend on sales and marketing to win one new customer, calculated as total sales and marketing spend divided by the number of new customers that spend acquired in the same period. It is the denominator behind every unit-economics question you have: whether a channel pays back, whether you can afford to scale spend, and whether the business gets more profitable as it grows or less.

> **Formula:** CAC = total sales and marketing spend in a period / new customers acquired in that same period. Load the spend fully: ad budget, the salaries of everyone in sales and marketing, agency fees, and the tools they run on, not just the media bill.

## How CAC is calculated

Worked example: last quarter you spent $90,000 across sales and marketing and closed 75 new customers. $90,000 / 75 = **$1,200 CAC**. That is the live calculator's default, so change the two inputs above and the number moves with you. The figure is only as honest as the spend you feed it: skip the headcount and tools and you get a flattering number that falls apart the moment finance loads the real costs.

Two flavours are worth separating. Blended CAC divides total spend by every new customer, paid and organic alike, and it is the number most benchmark reports quote. Paid CAC divides only your paid-channel spend by the customers that channel produced, and it is the one that tells you whether to pour more budget into a campaign. A low blended CAC propped up by free word of mouth can hide a paid channel that loses money on every signup.

CAC on its own is half an answer. The other half is what a customer is worth, so read it next to [lifetime value](https://www.productgrowth.blog/calculators/customer-lifetime-value-ltv) and the [LTV:CAC ratio](https://www.productgrowth.blog/calculators/customer-lifetime-value-to-customer). A $1,200 CAC is cheap for a customer who pays you $20,000 over their life and ruinous for one who churns at $300.

## Customer Acquisition Cost (CAC) benchmarks by industry

| Industry | Median | Good | Great |
| --- | --- | --- | --- |
| SaaS | $900 | $450 | $200 |
| Fintech | $1,450 | $800 | $400 |
| Dev Tools | $700 | $400 | $180 |
| AI/ML | $650 | $350 | $180 |
| E-commerce | $250 | $120 | $50 |
| Healthtech | $950 | $550 | $280 |
| Martech | $600 | $320 | $150 |
*Blended CAC ($) · First Page Sage, Average CAC by Industry B2B Edition 2026 (Fintech SaaS $1,450; Medtech $921; Software Development $720; Adtech $560; eCommerce $274; IT & Managed Services $454). AI/ML has no dedicated vertical in that study; its row is a conservative estimate held between Dev Tools and SaaS. Benchmarkit 2025 B2B SaaS Performance Metrics (2024 data): median New CAC Ratio $2.00 of S&M per $1 of new ARR, bottom quartile $2.82.*

These bands come from [First Page Sage's 2026 CAC by Industry study (B2B edition)](https://firstpagesage.com/reports/average-customer-acquisition-cost-cac-by-industry-b2b-edition-fc/?utm_source=productgrowth.blog), which puts blended fintech SaaS CAC near $1,450, medtech around $921, software development at $720, adtech at $560, and e-commerce SaaS near $274. The spread tracks sales complexity: regulated, high-trust buying like fintech and healthtech costs the most to win, while consumer-adjacent e-commerce costs the least. There is no clean AI/ML row in that study, so treat the AI/ML band here as a careful estimate sitting between dev tools and broad SaaS, not a sourced figure. Stage matters too, so [Benchmarkit's 2025 SaaS metrics report](https://www.benchmarkit.ai/2025benchmarks?utm_source=productgrowth.blog) found the median company now spends about $2.00 in sales and marketing for every $1.00 of new customer ARR, with the bottom quartile near $2.82, the worst efficiency in years.

## How to bring CAC down

The fastest lever is usually not a cheaper channel, it is a higher conversion rate on the traffic you already pay for. Halve the leak between signup and activation and you halve CAC without touching the ad budget, which is why the metric belongs next to your [conversion rate](https://www.productgrowth.blog/calculators/conversion-rate) and [cost per lead](https://www.productgrowth.blog/calculators/cost-per-lead-cpl) on the same dashboard.

1. **Fix activation before spend.** If new users do not reach value, every dollar of acquisition leaks straight back out as early churn. Cheaper than any channel optimisation.
2. **Lean on channels that compound.** Referrals, organic search, and content carry a near-zero marginal CAC once they are running. First Page Sage's blended CAC is roughly 75% organic for that reason.
3. **Cut payback to free up cash.** A lower CAC shortens the months it takes to earn the customer back. Track it with the [CAC payback period calculator](https://www.productgrowth.blog/calculators/cac-payback-period).

#### What is a good customer acquisition cost (CAC)?

There is no single good number; CAC only makes sense against industry and lifetime value. Blended B2B SaaS CAC runs roughly $900 at the median, dropping toward $200 for the most efficient companies, while regulated fintech and healthtech sit near $1,450 and e-commerce can come in under $300. The honest test is the LTV:CAC ratio: aim for at least 3:1, meaning a customer is worth three times what you paid to win them, and a CAC payback period under 12 months.

#### How do you calculate CAC?

Add up all sales and marketing spend in a period, including salaries, ad budget, agency fees, and tools, then divide by the number of new customers you won in that same period. If you spent $90,000 and closed 75 customers, your CAC is $1,200. Use the same window for both numbers so spend and customers line up.

#### What is the difference between CAC and CPA?

CAC counts the cost of winning a paying customer; cost per acquisition (CPA) usually counts the cost of a lighter action like a signup, lead, or trial. CAC sits at the bottom of the funnel and is always higher, because only some of the signups CPA pays for ever convert to paying customers.

#### Should CAC include salaries?

Yes. A fully loaded CAC includes the salaries and overhead of everyone in sales and marketing, not just media spend. Ad-only CAC looks great on a slide and falls apart the moment you account for the team running the campaigns, which is why most benchmark reports quote the loaded figure.

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