Agencies and consultancies don't typically think in SaaS terms, but LTV:CAC is equally valid — and often better than most SaaS companies because client retention is high and CAC can be very low (referrals, reputation, LinkedIn).
Agency LTV formula
Monthly retainer × Average client tenure (months) × Gross margin %
A $5,000/month retainer client who stays 24 months at 35% margin: LTV = $5,000 × 24 × 0.35 = $42,000
Agency acquisition costs
| Channel | Typical CAC |
|---|---|
| Referral from existing client | $0–$500 |
| LinkedIn outreach | $500–$2,000 |
| Paid ads (lead gen) | $2,000–$8,000 |
| Conference / events | $3,000–$15,000 |
| Cold outbound | $1,000–$5,000 |
Improving agency LTV:CAC
- Extend client tenure: quarterly business reviews, proactive reporting, and value expansion conversations (upsell from retainer to project work) are the highest-leverage levers
- Reduce CAC: a strong referral program (10% of first year value to the referrer) can make referrals the primary channel — near-zero CAC and highest-quality clients