SaaS CAC Calculator - Customer Acquisition Cost for Software Companies
CAC measures sales and marketing acquisition spend per new paying customer. Review it alongside customer value, gross margin, and payback. Bessemer’s 2021 guidance recommends payback under 12 months for SMB, 18 for mid-market, and 24 for enterprise SaaS; these targets depend on the business context.
SaaS CAC reference points
Payback targets come from Bessemer’s 2021 cloud report. They are segment-specific guidance, not industry averages.
SaaS acquisition channels
Paid Search (Google Ads)
Compare keyword intent, conversion, and acquisition cost.
Content Marketing / SEO
Include content production and distribution costs when measuring acquisition.
Outbound SDR
Include prospecting, sales staff, and supporting tools in acquisition cost.
Product-Led Growth
Track trial or freemium conversion alongside the cost of serving free users.
Partner / Referral
Include partner fees, incentives, and program costs.
Social Ads (LinkedIn)
Compare acquisition cost and customer value by audience.
SaaS CAC Measurement Tips
Separate new logo CAC from expansion CAC. Most SaaS companies focus on new logo CAC, but tracking expansion separately helps compare its acquisition costs with new-customer acquisition.
Include fully-loaded sales and marketing costs. A common mistake is excluding SDR salaries, sales tools, marketing software, and event costs. True CAC must include all costs required to acquire a customer.
Track blended and paid CAC separately. Blended CAC covers all new customers; paid CAC divides paid-channel acquisition costs by customers attributed to those channels. Paid CAC is an average over the measured period, not necessarily the cost of acquiring the next customer.
Segment CAC by deal size. SMB and enterprise have fundamentally different acquisition economics. Mixing them produces a misleading average that obscures which segments are profitable.
Measure payback alongside CAC. With the same margin, $1,000 CAC takes longer to repay at $20 monthly ARPU than at $200. Retention and available cash also matter; ARPU alone does not establish whether either case is viable.
Calculate Your SaaS CAC
Use our free CAC calculator with your actual marketing and sales numbers. Includes a cost-category breakdown and optional LTV:CAC and payback inputs.
Open CAC CalculatorSaaS CAC: Frequently Asked Questions
Judge CAC against gross-profit LTV, payback, and available cash. Bessemer’s 2021 report recommends payback under 12 months for SMB, 18 for mid-market, and 24 for enterprise SaaS. Treat a 3:1 LTV:CAC ratio as a guideline, and verify the retention and margin assumptions behind it.
SaaS CAC = Total Sales and Marketing Spend / Number of New Customers Acquired. Use the same time period for both numbers, typically monthly or quarterly. Include all sales and marketing costs: salaries, commissions, ad spend, tools, events, and agency fees. Divide by only new customers, not expansions or renewals. If the sales cycle creates a lag, compare acquisition spending with the customer cohort it supported and state the method.
CAC payback period is the number of months it takes to recover your customer acquisition cost from gross profit. Formula: CAC Payback = CAC / (Monthly ARPU x Gross Margin). For example, if CAC is $600, ARPU is $100/month, and gross margin is 75%, payback = $600 / ($100 x 0.75) = 8 months. Investors and operators use this metric to assess cash efficiency. Bessemer Venture Partners sets the target ladder by segment: under 12 months for SMB SaaS, under 18 for mid-market, and under 24 for enterprise.
PLG lets users try the product through a trial, freemium tier, or referral before a sales conversation. That can reduce some acquisition costs, but results depend on conversion, product costs, and customer value. Teams may add sales support for enterprise deals; compare the economics of each approach.