Blended CAC
Fully loaded S&M ÷ **`max(new logos, 1)`**—pairs with **cac-payback-months** and **ltv-cac** embeds.
Example scenario
Finance closes Q2 with $410,000 in fully burdened sales and marketing OPEX—paid media, brand campaigns, sales commissions coded to S&M, MAP subscriptions, and field events—excluding CS upsell headcount tagged below gross margin (“Sales & marketing spend”). RevOps certifies 118 net-new customer IDs with firstSubscriptionInvoice dates inside the quarter (“New customers acquired”). Blended CAC lands near $3,475 per logo ($410K ÷ 118), implying roughly 2.88 net-new customers per $10,000 of S&M throughput—compare cohort gross margin before trusting headline efficiency versus enterprise-heavy ramps.
Blended CAC
Sales & marketing spend ÷ new customers
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How to calculate blended customer acquisition cost
- Pull trailing-period sales and marketing expense from the GL—map commissions, demand-gen software, creative agencies, and regional marketing payroll consistent with how FP&A briefs the board.
- Count “New customers acquired” as net-new accounts with first revenue recognition or activated subscriptions—exclude expansion SKUs and self-serve upgrades unless growth defines them as new logos.
- Divide spend by logos for “CAC (blended),” then read “New customers per $10k S&M spend” when execs ask efficiency elasticities under flat budgets.
- Reconcile numerator timing—multi-quarter nurture cycles mean spend today closes logos next quarter—avoid panic when blended CAC spikes during pipeline investment months.
Blended CAC planning context
- Public SaaS blended CAC dispersion by ACV band
- SMB motions often land materially lower dollars-per-logo than enterprise—benchmark inside your ARPA cohort, not industry medians from VC decks
- Fully loaded S&M definitions auditors tolerate
- Typically demand-gen, brand, SDR/AE compensation booked under S&M GA buckets—excluding pure research-and-development growth hacks unless capitalization policies say otherwise
- Throughput sanity—logos per incremental spend
- Reverse metric (“New customers per $10k S&M spend”) exposes elasticity faster than vanity percentage lifts when budgets surge ahead of pipeline maturity
Best use cases
- Growth and performance planning
- Budget and forecast scenario modeling
- Client-facing pre-qualification and education
Frequently asked questions
Should stock-based comp for sales leaders sit inside S&M spend?
Follow non-GAAP reporting policies—many boards add SBC back out for efficiency ratios while GAAP filings include it. Pick one definition per KPI dictionary.
Why exclude customer success from blended CAC?
CS usually owns retention and expansion ARR—mixing those costs into acquisition numerator inflates CAC when install base scales. Split blended vs. expansion cohort economics intentionally.
How do free trials or freemium users distort “new customers”?
Define conversion precisely—paid activation dates versus signup timestamps. Misaligned definitions double-count tire kickers or undercount delayed conversions spanning quarters.
Can I annualize one-month spend and logos?
Yes if seasonality is noisy—use trailing-twelve logo cohorts against trailing-twelve S&M for smoother ratios, noting finance closes lag actual bookings.
Glossary
Scenario modeling
Comparing multiple assumption sets to estimate potential outcomes before execution.
Conversion intent
User behavior that indicates readiness to take a commercial action such as signup or purchase.
Related calculators
Category: SaaS growth metrics & board reportingTopics: Blended CAC, Sales and marketing efficiency, New logo acquisition
Last reviewed: 2026-05-07
Reviewed by: Calclet Growth Team