CAC (Customer Acquisition Cost) is the most-quoted SaaS metric and also the most-misreported. Most teams use blended CAC, which under-counts the cost of acquiring the customers you actually keep. This calculator does the proper math: blended CAC, qualified-cohort CAC, LTV:CAC ratio with verdict chips against 2026 SaaS benchmarks (3:1 minimum, 5:1 healthy, 7:1+ exceptional), and CAC payback period (12-18 months for healthy SaaS).
Blended CAC = total sales + marketing spend ÷ all new customers. The problem: customers acquired via free trial or low-intent channels often churn within 90 days, distorting your real cost of "kept" customers. Qualified-cohort CAC measures the cost per customer who is still active after a defined retention window (typically 90 or 180 days). For most SaaS, qualified-cohort CAC runs 1.4-2.2× higher than blended — meaningful enough to change paid-channel decisions.
KeyBanc Capital Markets 2024 SaaS Survey: median LTV:CAC for healthy SaaS is 4.5:1, with top quartile at 7:1+. CAC payback period: median 18 months, top quartile <12 months. Below 3:1 LTV:CAC indicates customer economics are too tight to scale paid acquisition profitably; below 1:1 means you're lighting money on fire. The calculator surfaces verdict chips against these tiers automatically.
Use both. Blended is what your CFO sees on the P&L. Qualified-cohort (CAC of customers retained past day 90/180) is what tells you whether paid channels actually pay back. Most decisions about scaling channels should use qualified-cohort, not blended.
KeyBanc 2024: median 4.5:1 for healthy SaaS, 7:1+ for top quartile. 3:1 is the floor below which scaling becomes uneconomical. Below 1:1 means churn is winning. Above 10:1 you're probably under-investing in growth and should accelerate spend.
CAC payback = CAC ÷ (ARR per customer × gross margin). KeyBanc 2024 median: 18 months. Top quartile: <12 months. Anything >24 months is hard to fund without strong cash position. Critical for venture-backed SaaS evaluating cash runway against burn.
Bad leads consume SDR + AE time at the qualification stage and inflate "fully-loaded" sales cost without producing customers. If your lead-to-customer rate is 2% versus a competitor's 5%, your CAC is 2.5× theirs at the same CPL. Run our Lead Qualification Cost calculator to quantify the payroll impact specifically.
Yes. Fully-loaded CAC includes: paid ad spend, content/SEO costs amortized, sales team salary + commission + tooling, marketing team salary + tooling, partner referral fees. Many teams report only paid-media CAC, which understates true CAC by 3-5×.
Sources: KeyBanc Capital Markets SaaS Survey 2024 · OpenView 2023 SaaS Benchmarks · Bessemer State of the Cloud 2024 · SaaS Capital 2024