Direct answer: The six SaaS unit economics metrics investors focus on in 2026 are: CAC (fully-loaded sales + marketing spend ÷ new customers), LTV (average contract value ÷ gross churn rate), LTV:CAC ratio (target ≥3:1, best-in-class ≥5:1), NRR (existing customer MRR change ÷ starting MRR, target ≥100%), burn multiple (net burn ÷ net new ARR, target <1.5×), and magic number (net new ARR ÷ prior quarter S&M, target ≥0.75). Most teams understate CAC by 30–60% by excluding sales salaries. Sources: OpenView Partners 2026 SaaS Benchmarks (February 2026); Visible.vc Q1 2026 (March 2026).
The 6 Core SaaS Unit Economics Metrics
The most common CAC error: excluding sales rep salaries, commissions, and tooling. This understates CAC by 30–60% for most B2B SaaS companies. Fully-loaded CAC includes:
- Sales rep salaries + commissions + benefits
- Marketing team salaries
- Ad spend across all paid channels
- CRM, sales enablement, and marketing tools
- Agency/freelancer spend
- Trade shows and events (attributed portion)
Source: OpenView Partners 2026 SaaS Benchmarks (February 2026).
The simplified LTV = ACV ÷ churn rate is directionally useful but misses gross margin and expansion. Cohort-based LTV is more accurate: track actual revenue from each customer cohort month-by-month, discounted to present value. This is what sophisticated investors calculate independently.
A gross margin adjustment matters: if your gross margin is 60% (not 80%), LTV is 25% lower than the simple formula suggests — which collapses your LTV:CAC ratio.
Source: Andreessen Horowitz (November 2025).
Note: LTV:CAC above 5:1 can prompt investor questions about whether you're underinvesting in growth. The right answer: show that marginal CAC for incremental spend is still efficient.
Source: OpenView Partners 2026 SaaS Benchmarks (February 2026); Visible.vc Q1 2026 (March 2026).
NRR above 100% means your existing customers alone would grow the business even if you stopped acquiring new customers. It is the single strongest signal of product-market fit at scale.
Source: Bessemer Venture Partners State of the Cloud 2026 (April 2026).
Example: if you burn $400K/month net and add $300K net new ARR/month, your burn multiple is 1.33× — best-in-class. If you burn $600K and add $200K net new ARR, your burn multiple is 3× — which requires a strong growth narrative to offset.
Source: OpenView Partners 2026 SaaS Benchmarks (February 2026).
The magic number is most useful for making go-to-market investment decisions. If it's above 1.0, you should be spending more on S&M. If it's below 0.5, more S&M spend will just lose money faster — fix the conversion funnel first.
Source: Visible.vc SaaS Metrics Benchmarks Q1 2026 (March 2026).
2026 SaaS Benchmarks Summary
| Metric | Best in Class | Acceptable | Below Bar |
|---|---|---|---|
| CAC Payback Period | <12 months | 12–18 months | >24 months |
| LTV:CAC Ratio | ≥5:1 | 3:1–4:1 | <3:1 |
| NRR | ≥120% | 100–119% | <100% |
| Gross Margin (SaaS) | ≥75% | 65–74% | <60% |
| Burn Multiple | <1.5× | 1.5–2.5× | >2.5× |
| Magic Number | ≥1.0 | 0.75–1.0 | <0.5 |
Sources: OpenView Partners 2026 SaaS Benchmarks (February 2026); Visible.vc SaaS Metrics Benchmarks Q1 2026 (March 2026); Bessemer State of the Cloud 2026 (April 2026).
Score Your SaaS Metrics Against These Benchmarks
The Financial Health Scorecard benchmarks your unit economics against investors' actual 2026 standards — and identifies what to fix before your next board meeting or funding round.