CAC — customer acquisition cost — is the single most lied-about metric in SaaS. Not because people are dishonest, but because most teams forget to count things. Sales salaries, tooling, agency fees, the coffee at trade shows. The honest version always feels worse than the version on the slide. This calculator gives you the honest version.
Industry benchmarks
How to calculate customer acquisition cost
CAC is conceptually simple. The formula is one line:
CAC = (Total Sales & Marketing Spend) / (New Customers Acquired)
The hard part isn't the math — it's deciding what counts as "spend." If you exclude sales salaries because "they'd be there anyway," you're lying to yourself. Include everything: ad spend, content costs, agency fees, sales salaries, commissions, tools, events, even the coffee at trade shows. The version that includes everything is sometimes called fully-loaded or blended CAC. It's the version that matters.
What drives CAC up
Five things, ranked by how much pain they cause:
- Long sales cycles. Every additional week of touch is more salary, more tooling, more meetings.
- Low conversion rates. A weak landing page or unclear ICP means most of the spend goes to people who never buy.
- Expensive channels. Paid media has a CAC floor. If you're paying for every click, you're paying forever.
- Poor targeting. Bad ad audiences and loose ICP definitions burn budget before any sales motion can save it.
- No attribution. If you don't know which channels actually produced customers, you can't fix the leak.
CAC by channel is where the real decisions happen
Blended CAC tells you whether the business works. Channel CAC tells you what to do tomorrow. If your paid CAC is $8,000 and your organic CAC is $800, you don't need a strategist — you need to shift budget. The companies that win at growth aren't the ones who spend the most. They're the ones who know exactly which dollars are working and double down on those. See how we optimize channel mix for B2B SaaS.
Frequently asked
What is a good CAC for SaaS?
A good CAC for B2B SaaS typically ranges from $200-$600 for SMB-focused products and $5,000-$20,000+ for enterprise. The number itself matters less than the ratio — your LTV:CAC ratio should be at least 3:1. If you are spending a dollar to make a dollar, that is not a business, that is a hobby.
How do you calculate customer acquisition cost?
CAC = (Total Marketing Spend + Total Sales Spend) / Number of New Customers Acquired. Include all costs: salaries, tools, ad spend, commissions, agency fees, and overhead. Most companies undercount by excluding sales costs — do not make that mistake.
What is the difference between CAC and blended CAC?
Simple CAC divides total spend by total customers. Blended CAC (also called fully-loaded CAC) includes all customer acquisition costs — marketing, sales salaries, tools, overhead, and commissions. Blended CAC is almost always the more honest number because it captures the true cost of acquiring a customer.
How can I reduce my SaaS CAC?
The highest-leverage ways to reduce CAC: improve conversion rates at each funnel stage, invest in organic channels (SEO, content, community), optimize paid media targeting, reduce sales cycle length, implement product-led growth motions, and improve lead quality so sales wastes less time on bad fits.