Core SaaS metrics every B2B founder needs to track
B2B SaaS is the most metrics-studied category in software. Investors, acquirers, and operators have developed a clear set of benchmarks for what good looks like at each stage. Here's what actually matters and what it should look like at your ARR tier.
Key metrics for B2B SaaS SaaS
Net Revenue Retention (NRR)
NRR is the single most important metric for B2B SaaS health. 100% means you're not losing revenue from existing customers. 120%+ means your existing base is growing.
CAC / LTV ratio
Your customer acquisition cost must be recoverable from lifetime value. LTV:CAC of 3:1 is the floor; 5:1+ is strong.
Monthly / Annual Churn Rate
Track both. Annual contracts hide monthly churn — when an annual customer doesn't renew, it shows up as a large one-time churn event.
Rule of 40 Score
Growth rate % + profit margin %. Below 40 needs explanation. Above 60 is excellent at scale.
Benchmarks for B2B SaaS companies
| Metric | Good | Great |
|---|---|---|
| NRR | > 100% | > 120% |
| Monthly churn | < 2% | < 0.8% |
| LTV:CAC ratio | > 3:1 | > 5:1 |
| Rule of 40 | > 40 | > 60 |
B2B SaaS metrics have been studied extensively, but most benchmarks assume you're measuring things correctly. Many early-stage companies are missing revenue they don't know about.
**The difference between MRR and cash**
MRR is a recognized revenue concept — it's the revenue you're entitled to in a given month based on contracts. Cash collected can differ significantly if customers pay annually in advance (good — you have cash before recognizing revenue) or pay net-60 on invoices (bad — you've recognized revenue you haven't collected). Monitor both.
**How expansion revenue changes the churn math**
A B2B SaaS company with 3% monthly gross churn and 110% NRR is losing customers but growing revenue from the ones that stay. The gross churn number looks alarming; the NRR tells the real story. Don't let gross churn metrics drive decisions without looking at NRR first.
**Failed payment recovery in B2B**
B2B companies often accept wire transfers, ACH, or invoice payment in addition to card. Each method has different failure modes. Card payments fail at 2–5% per month; ACH returns happen 3–5 days after the debit. If you don't have a dunning process for each payment method, you're losing revenue to payment failures every month.
Common revenue leaks in B2B SaaS SaaS
- ✗Seat expansion not captured when teams grow beyond original contract
- ✗Annual contract renewals missed when there's no proactive renewal workflow
- ✗Failed payment dunning that stops after 3 attempts instead of smart retry sequences
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