SaaS CAC Calculator - Customer Acquisition Cost for Software Companies
Customer acquisition cost (CAC) is one of the most critical unit economics metrics for SaaS companies. It determines how much you spend to acquire each new paying customer when you add together all sales and marketing expenses. SaaS CAC varies dramatically by deal size: self-serve SMB products can have CAC as low as $200, while enterprise deals requiring a full sales motion commonly run from $1,000 into the several thousands. The goal is always to maintain a healthy LTV:CAC ratio of 3:1 or better, with a CAC payback period that fits your segment: under 12 months for SMB, 18 for mid-market, and 24 for enterprise (Bessemer Venture Partners).
SaaS CAC Benchmarks
SaaS Acquisition Channels and Typical CAC
Paid Search (Google Ads)
High intent, competitive CPCs for SaaS keywords
Content Marketing / SEO
Lower CAC over time but slower ramp-up, 6-12 months to see results
Outbound SDR
High cost but effective for enterprise segments
Product-Led Growth
Freemium or free trial converts at 2-5% to paid
Partner / Referral
Lower CAC, higher close rates, harder to scale
Social Ads (LinkedIn)
Higher CPCs but strong B2B targeting
SaaS CAC Measurement Tips
Separate new logo CAC from expansion CAC. Most SaaS companies focus on new logo CAC, but tracking expansion separately reveals which customer segments generate the most revenue growth after 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 CAC vs. paid CAC separately. Blended CAC includes organic and word-of-mouth, paid CAC isolates the marginal cost of paid channels. Paid CAC helps you make channel investment decisions.
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 CAC payback period alongside CAC. A $1,000 CAC is acceptable if your ARPU is $200/month, but devastating if ARPU is $20/month. CAC payback period provides the full picture.
Calculate Your SaaS CAC
Use our free CAC calculator with your actual marketing and sales numbers. Supports blended CAC, paid CAC, and channel-by-channel breakdown.
Open CAC CalculatorSaaS CAC: Frequently Asked Questions
A good SaaS CAC depends on your deal size and LTV. For SMB SaaS, a CAC under $400 is strong. Mid-market targets under $800, and enterprise CAC commonly runs $1,000 to $5,000 or more, which is healthy when contract values support it. More important than the absolute number is your LTV:CAC ratio (aim for 3:1+) and a CAC payback period that fits your segment: under 12 months for SMB, 18 for mid-market, 24 for enterprise (Bessemer). A high CAC is acceptable if you have strong retention and high LTV.
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. Many SaaS companies also track CAC with a 1-3 month lag to account for the sales cycle length.
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 reduces CAC by letting the product itself drive acquisition through free trials, freemium tiers, or viral mechanics. In PLG models, users discover and experience value before any sales interaction, which dramatically lowers the cost per qualified lead. Top PLG companies achieve blended CACs of $50-$200 versus $500-$1,000+ for traditional sales-led SaaS. The trade-off is lower average deal size, though successful PLG companies add sales overlays to capture enterprise deals.