CAC Calculator: Know Your True Customer Acquisition Cost
Calculate your new customer CAC and blended CAC side by side, then compare your number against verified benchmarks for SaaS, eCommerce, and Fintech. Most teams are surprised to find their blended number is hiding a much higher cost to acquire net-new customers.
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Why new customer CAC and blended CAC tell different stories
Customer acquisition cost is the total sales and marketing spend required to bring in one new customer. Blended CAC folds reactivated customers into the denominator, which makes your acquisition efficiency look better than it actually is. If you are spending $400K per month and acquiring 200 net-new customers plus 80 reactivations, your blended CAC looks like $1,428 but your true new customer CAC is $2,000. That gap matters when you are modeling payback periods or pitching a new channel.
If you are evaluating whether to reduce your CAC through channel optimization or headcount efficiency, start with the new customer number. Teams using performance marketing automation typically see 15-30% CAC reduction within two quarters by eliminating manual work from the highest-spend channels.
B2B SaaS CAC benchmarks by segment
OpenView Partners SaaS benchmarks for companies targeting SMB buyers with ACV below $10K.
Mid-market SaaS companies at $20K-$80K ACV run significantly higher CAC reflecting longer sales cycles and enterprise tooling.
The 3:1 ratio is the Series B investor floor. Companies above 5:1 often have room to increase CAC and acquire faster.
A common rule of thumb: if your CAC exceeds one-third of first-year revenue from a customer, your payback period will likely exceed 12 months.
Four steps to your true CAC
Enter total sales and marketing spend
Input your fully loaded sales and marketing costs for the period: salaries, agency fees, paid ad spend, tools, and events. Use the same period you will use for customer counts.
Enter new customers and total customers acquired
Enter new logo count separately from reactivated or expansion customers. This lets the calculator show both your new customer CAC and your blended CAC side by side.
Compare new vs blended CAC
The gap between new customer CAC and blended CAC reveals how much of your acquisition efficiency is coming from reactivations. A large gap is a warning that net-new acquisition is far more expensive than it appears.
Benchmark against your vertical
Compare your CAC to the benchmark ranges for your ACV tier. If you are significantly above benchmark, the calculator surfaces the likely drivers and links to resources for improving each lever.
CAC questions, answered.
How do you calculate CAC?
CAC equals total sales and marketing spend divided by the number of new customers acquired in the same period. If you spent $300,000 in a quarter and acquired 150 new customers, your CAC is $2,000. The key word is new customers: if you fold reactivations or expansions into the denominator, you get blended CAC, which understates your true cost to acquire net-new logos.
What is a good CAC for B2B SaaS?
B2B SaaS CAC varies widely by segment and ACV. SMB-focused SaaS typically sees CAC between $200 and $1,500. Mid-market companies targeting $20K-$100K ACV deals commonly run $3,000-$8,000 CAC. Enterprise with $100K+ ACV can justify $15,000-$50,000 CAC when LTV exceeds $150,000. The real question is your LTV:CAC ratio, which should be 3:1 or higher.
What is the formula for CAC?
New customer CAC = (Total sales spend + Total marketing spend) / New customers acquired. Blended CAC uses all customers acquired including reactivations in the denominator. Fully loaded CAC also includes customer success costs allocated to the acquisition phase, which is how most CFOs and investors calculate it.
What is the difference between new customer CAC and blended CAC?
New customer CAC measures the cost to acquire a brand-new logo. Blended CAC folds reactivated churned customers and sometimes expansion revenue into the denominator. Blended CAC is always lower than new customer CAC, which is why it is misleading for modeling payback periods or evaluating channel efficiency.
What is a good CAC for B2B SaaS by vertical?
According to ProfitWell and OpenView Partners benchmarks: SaaS targeting SMB ($1K-$10K ACV) sees median new customer CAC of $702-$1,200. Mid-market SaaS ($20K-$80K ACV) typically runs $4,000-$10,000. Enterprise SaaS ($100K+ ACV) commonly sees $20,000-$60,000 CAC. Fintech is 30-50% higher than equivalent SaaS because of compliance and trust overhead.
How can I reduce my CAC?
The highest-leverage CAC reduction levers are: improving conversion rate on demo and trial landing pages (moving from 1% to 2% CVR halves your traffic CAC), shifting budget toward channels with lower CAC but similar LTV, reducing sales cycle length through better qualification, and investing in content and SEO which compounds over time with near-zero marginal CAC.
How does Hellyeah help reduce CAC?
Hellyeah agents automate the marketing execution work that directly impacts CAC: writing and testing ad copy faster, auditing landing page messaging for conversion gaps, and surfacing which campaigns are generating pipeline versus wasting spend. Reducing the headcount and time required for those workflows lowers the numerator in the CAC formula.
Should I include salaries in CAC?
Yes, fully loaded CAC includes all direct sales and marketing headcount costs, agency fees, platform costs, and a prorated allocation of tools and overhead used in acquisition. Investors and CFOs calculate it this way. Marketing-only CAC that strips out sales salaries understates the real cost to acquire a customer and leads to incorrect payback period modeling.
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Your CAC, tracked and benchmarked automatically
Hellyeah agents monitor your blended and new customer CAC against vertical benchmarks in real time, flagging when acquisition efficiency drops and surfacing the channels and campaigns behind the change.