CAC Calculator (Customer Acquisition Cost)

Formula CAC = Total Acquisition Cost ÷ New Customers
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CAC
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CAC = Total Acquisition Cost ÷ New Customers

Use this free, online CAC calculator to calculate your customer acquisition cost instantly. It also works as a customer acquisition calculator, an acquisition cost calculator, and a reverse calculator just enter any two known values and it solves for the third.

What Is CAC (Customer Acquisition Cost)?

CAC, or customer acquisition cost, is the total sales and marketing cost required to acquire one new customer, typically calculated over a month or quarter across all channels combined, rather than for a single campaign the way CPA usually is.

CAC only tells you half the story on its own. A $1,200 CAC can be excellent or a disaster depending entirely on what that customer is worth to you over time, which is why this page also covers the LTV:CAC ratio, the framework nearly every current benchmark report treats as more important than the raw CAC number itself.

How to Calculate CAC

To calculate CAC, divide your total acquisition cost by the number of new customers it generated.

CAC = Total Acquisition Cost ÷ New Customers

Customer Acquisition Cost Calculator, Step by Step

  • Choose a time period (monthly, quarterly, or annual)
  • Sum all sales and marketing costs for that period, ad spend, tools, salaries, agency fees, everything that went into acquisition
  • Count the new customers gained in that same period
  • Divide total cost by new customers

Worked Examples

  • Small business: $5,000 spent, 50 new customers $5,000 ÷ 50 = $100.00 CAC
  • Mid-size SaaS company: $45,000 spent, 180 new customers $45,000 ÷ 180 = $250.00 CAC
  • Enterprise / sales-led: $850,000 spent, 340 new customers $850,000 ÷ 340 = $2,500.00 CAC

How to Calculate CAC Calculator Formula (Reverse Calculation)

Because this is a reverse-capable calculator, you can also start from a target CAC and solve for total cost or new customers instead.

  • To find Total Acquisition Cost: Total Acquisition Cost = CAC × New Customers
  • To find New Customers: New Customers = Total Acquisition Cost ÷ CAC

This is useful for growth planning. If your CAC typically runs $300 and the board wants 200 new customers next quarter, you know the acquisition budget needs to be at least $60,000, before the quarter starts rather than after you’ve already overspent.

LTV:CAC Ratio: The Number That Matters More Than CAC Alone

Virtually every current benchmark source agrees on this: comparing your raw CAC against an industry average tells you very little, because a $2,500 CAC is healthy for an enterprise deal worth $50,000 and reckless for a $200 product. The number that actually tells you whether acquisition is working is your LTV:CAC ratio.

LTV:CAC Ratio = Customer Lifetime Value ÷ CAC

What the ratio means in practice:

  • Below 2:1 — a warning sign. You’re close to break-even or losing money on acquisition once you account for delivery and overhead costs beyond marketing.
  • 3:1 — the widely cited healthy benchmark. You’re earning roughly $3 for every $1 spent acquiring a customer.
  • Above 5:1 or 6:1 — often a sign you’re under-investing in growth, not a sign everything is fine. Businesses in this range can frequently spend more on acquisition and still stay profitable.

Example: A customer generates $3,000 in revenue over their lifetime and costs $1,000 to acquire. LTV:CAC = $3,000 ÷ $1,000 = 3:1, right at the standard healthy benchmark.

Calculate your own LTV before judging your CAC against any benchmark below. The CAC number in isolation genuinely cannot tell you whether your business is healthy.

What Is a Good CAC?

CAC varies more by business model and deal size than almost any other marketing metric. The same “SaaS” label can mean a $200 self-serve CAC or a $67,000 enterprise CAC depending entirely on sales motion.

Context

Typical CAC

Source

E-commerce / DTC

$64 – $156

Tomba, LTV CAC Book, CO Consulting (2026)

B2B SaaS, blended average

$239 – $341

First Page Sage (2026)

B2B SaaS, self-serve / PLG

$200 – $700

Digital Applied, SaaSHero (2026)

B2B SaaS, enterprise sales-led

$5,000 – $67,000+

Digital Applied, Artisan Strategies (2026)

Education

~$1,143

First Page Sage (2026)

Legal services

$1,245+

CO Consulting (2026)

Consumer fintech

$1,340 – $2,140

LTV CAC Book (2026)

Why the range is wide: deal size and sales motion explain most of the variance here. A product-led-growth SaaS company selling a $30/month plan needs a CAC well under $500 to stay healthy; an enterprise sales team closing $100,000 annual contracts can profitably spend $10,000 or more per customer, and both can have identical, perfectly healthy LTV:CAC ratios. Never compare your CAC across a different business model or deal size, even within the same broad industry label.

How to Improve Your CAC

  • Improve customer retention: a longer average customer lifespan lowers the effective CAC-to-LTV ratio without changing acquisition spend at all
  • Invest in referral programs: referred customers typically cost 30 to 50 percent less to acquire than paid channels, and often carry higher lifetime value too
  • Compare organic and paid CAC separately: organic acquisition commonly costs roughly half of paid across most B2B industries, and blending the two hides where your real efficiency is coming from
  • Shorten the sales cycle where possible: every extra week in the pipeline adds cost without adding revenue
  • Improve activation and onboarding completion: customers who never fully activate quietly inflate your real CAC, since you paid to acquire them but they generate little to no durable revenue
  • Revisit CAC alongside LTV regularly: a rising CAC is only a problem if LTV isn’t rising to match it

Frequently Asked Questions

There’s no fixed dollar figure. CAC is “good” when your LTV:CAC ratio is healthy, commonly cited as 3:1 or better. A $2,500 CAC can be excellent for an enterprise deal worth $50,000+ over its lifetime, and poor for a product worth $500.

Divide your total sales and marketing cost by the number of new customers acquired over the same period. For example, $5,000 spent generating 50 new customers gives a CAC of $100. The calculator above does this instantly, or you can use it in reverse to solve for total cost or new customers.

3:1 is the most widely cited healthy benchmark across current industry sources. You earn roughly $3 for every $1 spent acquiring a customer. Below 2:1 is generally considered a warning sign; consistently above 5:1 or 6:1 often signals under-investment in growth rather than genuine efficiency.

CAC is broader and business-wide, typically including all sales and marketing costs (ad spend, tools, salaries, agency fees) divided by total new customers over a period. CPA usually refers to the cost of one specific conversion action within a single campaign or channel, and doesn’t necessarily include overhead costs the way CAC does.

Organic acquisition (SEO, organic social, referrals) is typically cheaper than paid acquisition across most B2B industries. Commonly cited data shows organic CAC running roughly half of paid CAC on average. That said, organic channels usually take longer to build and scale less predictably than paid.

Use the reverse mode above: set “I want to calculate” to New Customers, enter 10000 for Total Acquisition Cost and 200 for CAC. The calculator shows 50 new customers.