Runway (Months)
Estimated number of months the company can operate at the current net burn before unrestricted cash reaches zero, holding everything else constant. The single most consequential survival input for venture-backed companies — it sets the urgency of every fundraising, hiring, and cost decision. Common pitfall: runway is often quoted off `finance.total_cash_in_bank` and a single-month spot-burn instead of operationally-available cash and a 3-month-trailing burn — the result is a runway that looks 2–4 months longer than it actually is when working capital tightens. Boards should ask which cash and which burn went into the calculation. — Finance KPI anchored to KBCM/Sapphire SaaS Survey 2024 (15th Annual).
Rogue ID: finance.runway_months
Type: Number (months)
Domain: Finance
Definition
Estimated number of months the company can operate at the current net burn before unrestricted cash reaches zero, holding everything else constant. The single most consequential survival input for venture-backed companies — it sets the urgency of every fundraising, hiring, and cost decision. Common pitfall: runway is often quoted off finance.total_cash_in_bank and a single-month spot-burn instead of operationally-available cash and a 3-month-trailing burn — the result is a runway that looks 2–4 months longer than it actually is when working capital tightens. Boards should ask which cash and which burn went into the calculation.
Formula
runway_months = max(finance.operationally_available_cash, finance.total_unrestricted_cash) / finance.net_burn_rate. When net burn is negative (cash-flow positive), runway is unbounded — render as ∞ rather than negative. Most boards use a 3-month-trailing-average net burn for the denominator to dampen single-month noise.Why it matters
Drives the timing of every fundraise, hire, and budget cut — and is the number investors lead with in diligence. Crossing under stage-typical thresholds usually triggers a board-level cost or fundraising conversation.
How to interpret
Stage-typical industry context (per the 2024 KeyBanc Capital Markets & Sapphire Ventures SaaS Survey §runway / month-of-cash discussion): private SaaS companies with $10M–$50M year-end ARR median ~25 months of cash; those <$10M or >$50M ARR median ~18 months. Practitioner heuristics (industry folk-wisdom, not citation-grade): under 6 months is critical (immediate fundraise or cost action); 12–18 months is healthy for active fundraising; 24+ months gives optionality. Recalculate any time burn changes materially or a tranche closes.
Related KPIs
finance.total_cash_in_bankfinance.total_unrestricted_cashfinance.operationally_available_cashfinance.net_burn_ratefinance.burn_rate_scenariosfundraising.target_raise
Source
KBCM/Sapphire SaaS Survey 2024 (15th Annual) · section: Months of Cash (Runway) by ARR Cohort — published 2024-09-01.
Why does this cite KBCM/Sapphire SaaS Survey 2024 (15th Annual)? Read the ontology methodology for the published vs editorial tier system, attribution rules, and dispute process.
Stage relevance
| Company stage | Priority |
|---|---|
| Pre-Seed | Core |
| Seed | Core |
| Series A | Core |
| Series B | Recommended |
Suggested for stages: Pre-Seed, Seed, Series A, Series B.
Default owning functions
- Finance
Machine-readable
- This KPI as JSON:
/api/ontology/finance/runway_months.json - All Finance KPIs:
/api/ontology/finance.json - Full catalog:
/api/ontology/index.json