What CAC measures
Customer Acquisition Cost (CAC) is what you spend, on average, to acquire one new paying client — calculated as total acquisition spend divided by number of new clients acquired. Use the Marketing ROI Calculator to calculate this from your own numbers.
CAC means little on its own
A high CAC isn't automatically bad, and a low CAC isn't automatically good — it depends on what that client is worth to you over time. This is why CAC is best evaluated alongside Customer Lifetime Value, not in isolation.
A simple rule of thumb some businesses use: if a new client's lifetime value is at least 3x your CAC, that acquisition channel is generally healthy. Treat this as a rough guide, not a strict rule — your own margins and cash flow needs matter too.
Reducing CAC without cutting corners
- Improve your Google Business Profile and reviews — free channels that lower your blended CAC.
- Increase referrals — a referred client typically costs less to acquire than a cold ad-driven one.
- Improve your booking conversion rate so fewer inquiries are "wasted" before they become an actual booking.
Frequently asked questions
Should every marketing channel have the same CAC target? No — a paid ad channel and organic referrals will naturally have very different CAC, and that's expected. Compare each channel's CAC against its own contribution, not against each other in isolation.
How often should I recalculate CAC? Regularly enough to catch meaningful changes — monthly or quarterly is reasonable for most small beauty businesses, rather than a one-time calculation.