How do you read CAC payback when half your sales motion is PLG and half is enterprise outbound?
The Hybrid CAC Problem
Blended CAC payback breaks when you're running two fundamentally different go-to-market engines. PLG land-and-expand has near-zero sales cost per first user; enterprise outbound costs $15K–$40K per deal. Averaging them masks which arm actually works.
The Right Split
Track them separately:
- PLG CAC payback: months until that user's expansion revenue covers acquisition spend (often 3–6 months, sometimes never on initial sale)
- Enterprise CAC payback: months until ASP or expansion revenue hits 2–3x initial contract value
- Blended payback (optional reporting): weight each by pipeline contribution, not just revenue
Key Metrics by Motion
| Motion | CAC Calc | Payback Target | Red Flag |
|---|---|---|---|
| PLG | signups × landing-page + email | 4–8 mo | >12 months |
| Outbound | salary/quota + 20% overhead | 18–24 mo | >30 months |
| Partner-led | partner rev-share | 24–36 mo | declining partner velocity |
Why This Matters
SaaStr and Pavilion both warn: blended metrics hide unit economics failure. You might think you're healthy at $1.20 CAC:LTV when really your PLG is 0.80 (scaling) and outbound is 2.10 (broken). Once you split them, you can:
- Kill underperforming outbound campaigns
- Reinvest in PLG acquisition (cheaper)
- Size your sales team correctly against payback math
Bridge Group's best-in-class SaaS companies separate the math entirely, funding each channel as its own P&L until maturity kicks in.
Implementation Shortcut
Tag every lead source in your CRM (organic, paid, sales, partner). Pull CAC by tag. If your payback spread is >12 months between channels, you've found your problem. Fix channel 2 before scaling either one.
TAGS: CAC payback,PLG,enterprise sales,SaaS metrics,unit economics,hybrid go-to-market,CAC:LTV