What is CAC?
CAC (Customer Acquisition Cost) is the fully loaded cost of acquiring one new paying customer. Unlike CPA (which can refer to leads or actions), CAC specifically measures the cost to acquire a customer who actually pays you money. It includes all sales and marketing expenses: ad spend, tool subscriptions, salaries, agency fees, content production, and overhead.
CAC = Total Sales and Marketing Costs / Number of New Customers Acquired
Why CAC Matters for B2B Sales
CAC is the north star metric for evaluating the efficiency of your entire go-to-market engine. Investors, boards, and leadership teams use CAC (especially the CAC-to-LTV ratio) to determine whether a business model is sustainable and scalable.
A healthy B2B SaaS company typically targets a CAC payback period of 12-18 months, meaning the revenue from a new customer covers the acquisition cost within the first 12-18 months of the relationship.
Key Benchmarks
- B2B SaaS (SMB): $200-$1,000 CAC
- B2B SaaS (Mid-Market): $1,000-$10,000 CAC
- B2B SaaS (Enterprise): $10,000-$100,000+ CAC
- Ideal LTV:CAC ratio: 3:1 or higher
- CAC payback period: Under 18 months
Components of CAC
- Marketing costs: Ad spend, content creation, events, tools, marketing team salaries
- Sales costs: SDR and AE salaries, commissions, sales tools, CRM subscriptions
- Agency/outsourcing fees: Lead generation agencies, consultants, freelancers
- Overhead allocation: Office space, equipment, software proportional to sales/marketing
Common Mistakes
- Not including all costs: Only counting ad spend gives a false picture, salaries are usually the biggest line item
- Blending inbound and outbound CAC: Track separately to know which channel is most efficient
- Ignoring CAC trends over time: Rising CAC may indicate market saturation or targeting issues
- Not segmenting by customer type: Enterprise CAC will always be higher than SMB, don't blend them
How FlowStrata Reduces CAC
FlowStrata helps B2B companies reduce CAC by replacing or supplementing expensive inbound channels with efficient outbound lead generation. Our done-for-you model eliminates the need to hire and train in-house SDRs, reduces tool and infrastructure costs, and delivers qualified meetings at a fraction of the cost of building an internal outbound team. Clients typically see a 30-50% reduction in effective CAC compared to in-house operations.