How is startup cash runway calculated?

SaaS cash runway is the number of months a company can operate before exhausting cash reserves, calculated as total liquid cash divided by net monthly burn (gross expenses minus gross revenues). Best practice mandates maintaining 18 to 24 months of verified runway to withstand funding cycles.

What is the difference between gross burn and net burn?

Gross burn is the total monthly operating cash outlay. Net burn is gross burn minus monthly recurring revenue collected. Net burn dictates the true monthly depletion of startup treasury balances.

Corporate Treasury Engine

SaaS Cash Runway & Net Burn Rate Modeling Engine

Interactive runway projection model for tech startups, factoring net monthly burn, revenue CAGR, and hiring cohorts.

Treasury & Burn Inputs

Current Liquid Cash Reserves ($)

Gross Monthly Operating Expenses ($)

Monthly Recurring Revenue (MRR) ($)

Projected MoM Revenue Growth (%)

Runway Projections

Estimated Runway

22 Months

Net Monthly Burn

$33,000/mo

Default State Status:

Healthy Runway (18+ mo)

Runway Tier	Operational Horizon	Executive Mandate
Over 24 Months	Comfort Zone	Aggressive product R&D and market expansion
18-24 Months	Target Ideal	Maintain disciplined CAC and unit economics
12-18 Months	Active Preparation	Initiate fundraising pipeline or tighten non-core burn
Under 12 Months	Critical Zone	Restructure team or initiate emergency capital injection

Startup Treasury & Banking Infrastructure

Built for High-Growth Startups

Mercury Startup Banking

FDIC-insured business checking, treasury yield, and automated runway management for founders.

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Venture Capital SaaS Net Burn Multiples & Runway Benchmarks (2025-2026)

Empirical research across 450+ venture-backed software companies (Bessemer Cloud Index & Stanford GSB Venture Studies) demonstrates that startup survival strongly correlates with net burn efficiency rather than gross capitalization. The empirical benchmark schedule below illustrates target burn multiples and median runway allocations.

ARR Stage	Median Net Burn Multiple	Top Quartile Efficiency	Target Runway Horizon	24-Month Survival Rate
Pre-Revenue to $1M ARR	1.8x to 2.4x	< 1.4x Net Burn	20 to 24 Months	68.4%
$1M to $5M ARR	1.3x to 1.7x	< 1.1x Net Burn	18 to 22 Months	82.1%
$5M to $15M ARR	0.9x to 1.2x	< 0.8x Net Burn	18 to 24 Months	91.5%
$15M+ ARR (Scale)	0.4x to 0.7x	Cash Flow Breakeven	24+ Months / Self-Funded	97.8%