Customer Acquisition Cost (CAC) is one of the most important numbers in your business, yet many brands either don’t track it accurately or don’t know what to do once they have it.

How to Calculate CAC Correctly

CAC = Total marketing and sales spend over a period ÷ Number of new customers acquired in that same period

Common mistakes when calculating this include only counting ad spend and ignoring other marketing costs, or measuring over inconsistent time periods that don’t align with when those customers actually converted.

Why CAC Alone Isn’t Enough

CAC only tells part of the story — it needs to be evaluated alongside Customer Lifetime Value (LTV). A high CAC can still be profitable if LTV is high enough; a low CAC can still be unsustainable if customers rarely make a second purchase.

A Healthy CAC-to-LTV Relationship

As a general benchmark, many businesses aim for an LTV to CAC ratio of at least 3:1 — meaning a customer generates at least three times what it cost to acquire them, leaving enough margin to cover operations and reinvest in growth.

Practical Ways to Improve CAC

• Improve landing page and checkout conversion rates, so more of your existing traffic actually converts
• Strengthen retargeting to convert warm audiences more efficiently than constantly chasing cold ones
• Refine targeting to focus spend on audiences most likely to convert and stay
• Invest in organic content and brand-building, which reduces long-term reliance on paid acquisition alone
• Improve creative and offer clarity, since even small conversion rate improvements meaningfully lower CAC

Why CAC Tends to Rise Over Time

As you exhaust your most responsive initial audiences, subsequent customers often cost more to acquire — this is normal, but should be tracked and managed rather than ignored until it becomes unsustainable.

At Digify, CAC and LTV are core metrics we track for every performance marketing engagement, not vanity numbers like reach or impressions alone.

FAQs

Q: What counts as a “good” CAC?

A: This varies enormously by industry and price point — the more meaningful benchmark is your CAC relative to your customer lifetime value, not an absolute number.

Q: How often should I recalculate my CAC?

A: Monthly tracking is common for most growing brands, allowing you to catch upward trends early before they become a serious profitability issue.

Q: Does CAC include organic marketing costs, or just paid ads?

A: A complete CAC calculation should include all customer acquisition costs — paid ads, content creation, and relevant team time — not just ad spend alone.

Q: What’s the fastest way to lower CAC without cutting ad spend?

A: Improving conversion rate on your existing traffic (through better landing pages, offers, or creative) typically delivers the fastest CAC improvement without needing to change spend levels.