CAC is all marketing and sales cost, including salaries, tools and agency fees, divided by the new customers it won. $60,000 of fully loaded cost producing 150 customers is a $400 CAC. Judge it against lifetime value rather than in isolation: a 3:1 LTV to CAC ratio is the widely used healthy benchmark, and below 1:1 the business loses money on every customer it acquires.
What is customer acquisition cost?
CAC is everything you spent to win customers divided by the number of new customers you won. The word everything is doing the work: media, tools, agency fees, and the salaries of the people running both marketing and sales. Counting media alone produces a flattering number that no investor or board will accept.
The denominator matters just as much. Count genuinely new customers, not orders and not returning buyers. Mixing repeat purchases into the count is the fastest way to make acquisition look cheaper than it is.
The LTV to CAC ratio
CAC on its own is not good or bad; it is only meaningful against what a customer is worth. The common benchmark is 3:1, meaning a customer returns three times what they cost to acquire. Below roughly 1:1 the business loses money on every customer it wins.
A ratio far above 3:1 is not automatically good news either. It often means the business is underinvesting in growth and leaving reachable demand unbought. The useful question is whether you could profitably spend more, not whether the ratio is as high as possible.
Payback period matters as much as the ratio
A healthy ratio recovered over three years is a very different business from the same ratio recovered in three months, because the second one can reinvest its own returns and the first must finance them. Cash, not ratio, is what constrains most growth.
This is also why first-order break-even and lifetime break-even are different decisions. You can afford to lose money on a first order only if the repeat rate carrying that loss is measured rather than assumed.
CAC benchmarks
Benchmarks are a sanity check, not a target. Your own account history on the same audience and placement is always the better comparison, but these are the numbers to reach for when you have none.
How to read an LTV to CAC ratio
These are operator rules of thumb rather than measured industry medians, which vary too widely by model to quote as a single figure.
| Ratio | What it usually means |
|---|---|
| Below 1:1 | Losing money on every customer acquired |
| 1:1 to 2:1 | Acquisition is barely paying for itself; no room to fund overhead |
| 3:1 | The widely used healthy benchmark |
| 4:1 to 5:1 | Efficient, and often a sign you could profitably spend more |
| Above 5:1 | Usually underinvestment in growth rather than excellence |
Frequently asked questions
How do you calculate CAC?
Add all marketing and sales costs for a period, including media, tools, agency fees and salaries, then divide by the number of genuinely new customers acquired in that period. $60,000 of total cost producing 150 new customers gives a CAC of $400.
What is a good LTV to CAC ratio?
The widely used benchmark is 3:1, meaning a customer is worth three times what they cost to acquire. Below about 1:1 the business loses money on every customer. A ratio well above 3:1 often signals underinvestment in growth rather than efficiency.
How do I calculate the LTV to CAC ratio?
Divide customer lifetime value by customer acquisition cost. A $900 LTV against a $400 CAC is a 2.25:1 ratio, below the 3:1 benchmark most operators aim for. Enter lifetime value in the optional field above and this calculator returns the ratio alongside the share of lifetime value that acquisition consumes.
Should CAC include salaries?
Yes. Fully loaded CAC includes the salaries of marketing and sales staff, plus tools and agency fees. A media-only figure is really a blended CPA, and presenting it as CAC materially understates the cost of growth.
What is the difference between CAC and CPA?
CPA is media spend per conversion in a channel or campaign. CAC is all sales and marketing cost per new customer across the business. CPA is a campaign optimisation metric; CAC is a business health metric.
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Measuring is the easy half
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