What Does It Cost You to Win One Customer?
What this calculates
Customer acquisition cost is what you spend to win one customer. This divides sales and marketing spend for a period by the customers won in it, and separates the program spend from the salaries so you can see both. Excluding salaries makes the number smaller and makes it wrong.
A SaaS company spending $90,000 on sales and marketing to win 30 customers has a customer acquisition cost of $3,000. Strip the $36,000 of salaries out of that spend and the same 30 customers appear to cost $1,800 each.
Your numbers
What you spent
What you got
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Cost to win one customer
Live$3,000
fully loaded, across 30 customers won
- Program spend only
- $1,800
- What the salary line adds
- $1,200
- People share of CAC
- 40.0%
- Total spend in the period
- $90,000
Fully loaded
At $3,000 a customer, 40.0% of what you spent to win them was salary and $1,800 a head was program spend. That split is the ordinary one for a SaaS company with a sales team. This number means nothing on its own, so take it to the lifetime value calculator and read it as a ratio.
Pressure-test this against your real numbers
Thirty minutes on which half of the acquisition cost is actually buying customers.
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How is customer acquisition cost calculated?
Add the program spend and the sales and marketing salaries for one period, then divide by the customers won in that same period. The toggle decides whether the salary line is in the headline figure, and the page reports both either way, because the gap between them is usually larger than any efficiency change you could make this quarter.
Formula
Fully loaded CAC = (program spend + salaries) ÷ new customers Program-only CAC = program spend ÷ new customers What the salary line adds = fully loaded CAC − program-only CAC People share of CAC = salaries ÷ (program spend + salaries) This is blended CAC across every channel. Splitting it by channel needs the spend and the customers attributed separately, which is a different exercise.
- Spend and customers cover the same period. A long sales cycle breaks that assumption, because this quarter’s customers were won with last quarter’s spend, and the fix is to lag the spend by roughly your cycle length rather than to change the formula.
- Salaries are fully loaded, meaning base, commission, benefits and payroll tax for everyone whose job is winning customers. A founder selling half time belongs in here at half their cost.
- Customer success and account management are excluded unless they carry a new-business quota. Renewal and expansion work is retention cost, and putting it here inflates CAC while hiding the expansion it produced.
- This is blended CAC. Every channel is averaged together, so a cheap channel subsidizes an expensive one and neither is visible. Channel-level CAC needs attributed spend and attributed customers.
- Free trials and freemium users are not customers until they pay. Counting signups as customers produces a CAC that looks excellent and describes nothing.
When this number misleads
Blended CAC hides the number you actually need. A company spending nothing on paid and winning twenty customers through referral, alongside ten customers bought at $6,000 each, reports the same $3,000 blended figure as a company where every customer cost $3,000. The first has a growth problem it cannot see and the second has a cost problem it can. Referral, inbound and outbound do not cost the same and do not scale the same, so a blended figure is a reporting number rather than a decision one. Split it the moment one channel is carrying more than half your new business.
What is a good customer acquisition cost?
There is no such thing as a good CAC on its own. The same $3,000 is excellent against a $30,000 contract and fatal against a $500 one, so every honest benchmark for acquisition cost is a ratio rather than a number. What this page can tell you is what your CAC is made of, and whether the figure you are quoting includes the people who did the work.
Two ratios do the judging, and both need a number this page does not ask for. LTV to CAC compares acquisition cost against what a customer is worth over their life. CAC payback compares it against gross margin per month, which is how many months of that customer it takes to get the money back. The Customer Lifetime Value Calculator computes both, and this page deliberately does not duplicate them.
Should salaries be included in CAC?
Yes, if the number is going anywhere near a decision about the business. Fully loaded CAC counts the salaries of the people doing sales and marketing alongside the program spend. It is the version an investor will calculate from your accounts whether or not you calculate it yourself, and it is usually the larger number by a wide margin.
| People share of CAC | What it usually means | How fast it moves |
|---|---|---|
| Under 30% | Acquisition is mostly paid program spend | Fast, and it stops when the spending stops |
| 30% to 60% | The ordinary split for a SaaS company with a sales team | Mixed |
| Over 60% | Acquisition is mostly headcount | Slow, through productivity per rep or cycle length |
Those three bands are my own practitioner guidance, not research. I have not found a published dataset that splits acquisition cost into program and people, and I am not going to dress an estimate up as one. They come from what the split looks like in the engagements I run, and you should replace them with your own numbers if you have them.
There is a narrower version of this argument worth knowing. Some teams exclude salaries deliberately when judging a single campaign, because the salespeople were being paid whether or not the campaign ran. That is defensible for comparing one channel against another. It stops being defensible the moment the number is used to describe the company, and the toggle on this page exists to make the difference visible rather than to hide it. Which motion you are running changes the split more than any efficiency work does.
Questions founders ask about this
Should salaries be included in CAC?
Yes, when the number describes the company. Fully loaded CAC counts the salaries of everyone whose job is winning customers, and it is what an investor will calculate from your accounts regardless of what you publish. Excluding them is defensible for comparing one campaign against another, because those people were paid either way, and it is not defensible anywhere else.
What is a good CAC for a SaaS company?
There is no answer to that without knowing what a customer is worth. The same $3,000 is excellent against a $30,000 contract and fatal against a $500 one. Judge it as a ratio instead, either against lifetime value or against how many months of gross margin it takes to earn the money back.
What is the difference between blended and paid CAC?
Blended CAC divides all your acquisition spend by all your new customers, including the ones who arrived through referral and cost nothing. Paid CAC counts only the customers a channel actually bought. Blended always looks better, and the gap between the two is a measure of how much of your growth is not being paid for.
Does customer success belong in CAC?
Not unless they carry a new-business quota. Their work retains and expands customers you already have, which is retention cost rather than acquisition cost. Putting them in CAC inflates the figure and simultaneously hides the expansion revenue they produced, so it damages two numbers at once.
Do you store what I enter?
No. The calculation runs in your browser and nothing is transmitted. Your last inputs are saved in your own browser so the page remembers them when you return. If you use the email field, only the result summary and your address are sent.
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