Comparing Cost Per Acquisition (CPA) to Lifetime Value (LTV) tells you whether what you’re spending to get a new member actually makes sense over the long run. Here’s how to do it step-by-step:
1. Calculate CPA (Cost Per Acquisition)
Example:
You spend $2,700 on ads + staff/follow-up cost of $300 = $3,000.
You acquired 30 new members.
2. Estimate LTV (Lifetime Value)
Basic formula:
LTV = Average Monthly Revenue per Member × Average Lifetime (in months)
To estimate lifetime, use churn:
Example:
- Average member pays $150/month
- Monthly churn is 5% → lifetime ≈ 1/0.05 = 20 months
LTV = $150 × 20 = $3,000
If you want to be more precise, subtract direct service delivery cost to get gross margin-based LTV (e.g., if delivering the service costs you $30/month in overhead, use $120 net per month instead of $150).
3. Compare the Ratio (LTV : CPA)
Healthy benchmark: 3:1 or better.
If it’s below 2:1, you’re either overspending to acquire or not retaining/monetizing long enough.
4. Calculate Payback Period
How long it takes to recoup the acquisition spend:
With $150/month revenue:
If using net margin (say $120 net):
5. Segment by Source
Do the above calculations per lead source. You might find:
- Facebook: CPA $224.25, LTV $897 → 🟡 good (4:1 ratio)
- Organic: CPA $144, LTV $3,600 → 🔵 excellent (25:1 ratio)
- Referral: CPA $0, LTV $6,300 → 🟢 best ROI (∞ ratio)
That tells you where to double down and where to optimize or cut.
6. Actionable Flags
Low LTV: Improve retention (reduce churn) by driving high-quality leads, nurturing new members, and adding greater value.
LTV / CPA < 2: Tighten acquisition targeting, improve onboarding and retention, or increase average revenue (upsells, longer commitments, referrals (e.g. bring a friend).
Payback > 3 months: Cash flow risk—consider ditching that lead source to prevent bleeding the business. If this is an overall problem, consider upfront payment incentives (e.g. 3 months for $850 instead of $900 or “pay-in-full” bonus (like a free guest session or branded gear)).
High CPA but high LTV: You can afford to spend more to scale if retention stays stable.
5 POWERFUL INSIGHTS FROM YOUR WEEKLY REPORT
Growing faster isn’t about more hustle—it’s about sharper visibility and smarter action. Read 5 POWERFUL INSIGHTS FROM YOUR WEEKLY REPORT, in that article we break down where real opportunity lives, what’s leaking, which sources deserve more budget, how to tighten your sales engine, and why celebrating progress matters.
