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What Is Customer Acquisition Cost In SaaS? – Explained

What Is Customer Acquisition Cost In Saas? - Explained
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Customer acquisition cost, or CAC, is one of the most important metrics for any Software as a Service (SaaS) business to understand and track. 

In simple terms, CAC tells you how much it costs to gain a new paying customer.

In this article, we’ll dive deep into what customer acquisition cost means in the world of SaaS. 

You’ll learn why it’s crucial to measure, how to calculate it, and proven strategies to optimize your CAC.

SaaS Basics: What You Need to Know

Before exploring CAC, let’s make sure we’re on the same page about SaaS.

SaaS is a way of delivering software applications over the internet, usually on a subscription basis.

Instead of installing and running software locally, you access it via a web browser, while the software and your data are stored on the provider’s servers.

Examples of popular SaaS applications include:

  • Salesforce for customer relationship management
  • Dropbox for cloud storage and file sharing
  • Slack for team communication and collaboration


The SaaS model offers many benefits over traditional software, such as:

  • Lower upfront costs (no expensive license fees)
  • Instant updates and new features
  • Easy scalability as your business grows
  • Built-in support and maintenance


For businesses, SaaS has been revolutionary:

  • It levels the playing field, giving small companies access to enterprise-grade tools
  • It reduces IT overhead and simplifies budgeting with predictable subscription fees
  • It enables remote work and collaboration across multiple locations

Customer Acquisition Cost: Defined and Explained

Now that we’ve covered SaaS essentials, let’s zoom in on customer acquisition cost. 

Put simply, CAC measures the cost of convincing a potential customer to buy your product or service.

CAC accounts for all the costs involved in acquiring new customers, such as:

  • Marketing and advertising spend
  • Salaries for marketing and sales staff
  • Sales commissions and bonuses
  • Technical costs for marketing websites and landing pages


Why does CAC matter so much for SaaS businesses? A few key reasons:

  1. Profitability: If your CAC is too high relative to the revenue you earn from each customer, your business will struggle to make a profit.
  2. Growth: Keeping CAC under control allows you to scale your customer base and revenue in a sustainable way. Sky-high acquisition costs will stunt your growth.
  3. Efficiency: Tracking CAC helps you see which of your marketing and sales activities deliver the best bang for your buck, so you can optimize your strategy.
  4. Valuation: Investors look closely at a SaaS company’s CAC when gauging its efficiency, profitability and growth potential. A healthy CAC can boost your valuation.

How to Calculate Customer Acquisition Cost

To calculate your company’s CAC, follow these steps:

  1. Define a time period you want to measure (monthly, quarterly or annually).
  2. Add up your total sales and marketing costs over that time frame – include ads, marketing salaries, sales commissions, and associated overhead.
  3. Divide that amount by the number of new customers acquired during the same period.


For example, if your company spent $100,000 on sales and marketing last quarter and gained 1,000 new customers, your CAC is $100,000 / 1,000 = $100.

It’s important to calculate and track CAC regularly, so you can spot issues quickly. Many SaaS businesses monitor CAC on a monthly basis.

Keep in mind some nuances when measuring CAC:

  • Isolate costs specifically tied to new customer acquisition; don’t include general brand-building activities or customer retention costs.
  • Be sure to count unique new paying customers, not freemium users or free trials that didn’t convert.
  • Consider breaking out CAC by acquisition channel (paid search, content marketing, etc.) to see which perform best.

CAC’s Role in the SaaS Business Model

In a SaaS business, customers pay recurring subscriptions to access the software, creating the potential for substantial long-term revenue.

However, SaaS companies need to invest a lot upfront in sales and marketing to acquire those customers.

Unlike a one-time software license fee, it can take months or even years to recoup the CAC and reach profitability for each customer.

This dynamic makes CAC absolutely crucial in the SaaS business model. 

If it costs you more to acquire each new subscriber than you’ll likely earn from them, you’ll quickly burn through cash.

Even if your product is amazing, excessive acquisition costs will be a major drag on growth. 

Successful SaaS startups are obsessive about tracking and optimizing CAC.

Proven Strategies to Optimize Customer Acquisition Cost

The good news is you have many levers to pull to lower your CAC and acquire customers more efficiently. Consider these tips:

  • Nail your ideal customer profile: The tighter you can define your target audience, the more effective your marketing spend will be. Create detailed buyer personas.
  • Produce high-quality content: Genuinely helpful blog articles, ebooks and webinars will attract potential customers and generate inbound leads at lower cost than paid ads.
  • Exploit organic search: Invest in SEO to rank for keywords your prospects are searching. Organic traffic has a high conversion rate and little incremental cost.
  • Launch a referral program: Your happy customers can be your best salespeople. Incentivize them to recommend you and watch your CAC plummet.
  • Perfect your onboarding: A smooth onboarding experience turns more free trials into paying users. Continuously test and optimize your conversion funnel.
  • Expand your freemium: While you need the right balance, a free tier is an excellent way to entice new users to try your software at very little cost to you.
  • Raise prices: It may seem counterintuitive, but if your product delivers lots of value, don’t be afraid to charge accordingly. Higher revenue per user offsets your CAC.

Putting It All Together

In the fast-moving world of SaaS, mastering customer acquisition cost is absolutely essential. 

Equipped with a solid grasp of CAC, you’ll be able to efficiently scale your business and maximize sustainable growth.

Remember, always keep a pulse on your CAC. 

Religiously track it, continuously work to optimize it, and make it a core topic in your management meetings.

By taking a strategic, data-driven approach to customer acquisition, you’ll be well on your way to building a thriving SaaS company – without burning piles of cash.

Picture of Walter Voronovic

Walter Voronovic

Founder @ WalterVoronovic.com. I've worked as a performance marketer since 2019. Today, I write about SaaS marketing & design and test & review marketing tools.
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