Runway Planning

Runway planning is insolvency avoidance. Runway modeling requires calculating fully-loaded gross burn and net burn, establishing deterministic Zero Cash Dates (ZCD), evaluating the "Default Alive vs Default Dead" framework, and structuring phased cost-reduction playbooks triggered by explicit cash thresholds.

1. Burn Rate & Runway Formulations

Calculate financial runway with mathematical precision:

• Gross Monthly Burn: $$\text{Gross Burn} = \text{Total Monthly Cash Outflows (Payroll + Hosting + Rent + Marketing + Tooling)}$$
• Net Monthly Burn: $$\text{Net Burn} = \text{Gross Burn} - \text{Total Monthly Cash Collections}$$ Rule: Use cash receipts, not accrual booked revenue, to calculate Net Burn.
• Months of Runway: $$\text{Months of Runway} = \frac{\text{Current Cash Balance} - \text{Restricted/Reserve Buffer}}{\text{Average Net Monthly Burn (Trailing 3 Months)}}$$
• Zero Cash Date (ZCD): The exact calendar date when the operating cash account reaches zero.

2. The Default Alive vs. Default Dead Framework (Paul Graham)

Evaluate company trajectory before planning capital allocation:

• Default Alive: If current revenue growth rate continues without hiring more staff or raising more capital, will the company reach cash flow profitability before running out of money?
• Default Dead: At the current burn rate and revenue trajectory, the company will run out of cash before reaching breakeven, requiring external financing to survive.
• Strategic Mandate: If Default Dead, the executive team must immediately either: (a) accelerate unit-profitable growth, or (b) reduce burn to cross into Default Alive territory.

3. The Runway Defense Trigger Framework

Establish pre-committed executive triggers tied to months of remaining runway:

4. Scenario Sensitivity Modeling

Model three distinct financial scenarios:

1. Status Quo (Base Case): Current net burn rate projected forward with modest planned growth.
2. Fundraising Runway Requirement: A standard venture capital fundraising process requires 6 to 9 months from first meeting to cash in bank. If you begin raising with <6 months of runway, you enter negotiations with zero leverage.
3. Emergency Zero-Growth Budget: Demonstrates the exact line-item cuts required to achieve cash flow break-even within 60 days.

Critical Rules

1. Never calculate runway using projected, unclosed revenue increases; runway is measured against guaranteed cash.
2. The fundraising countdown begins when cash hits 12 months, not 6 months.
3. Include severance costs, lease termination penalties, and working capital lag when modeling emergency expense reductions.

Verification Checklist

• Net burn calculated using cash collections rather than accrual revenue.
• Trailing 3-month average burn used to smooth one-off expenditure anomalies.
• Exact Zero Cash Date (ZCD) calculated and visible on executive dashboards.
• Default Alive / Default Dead status evaluated and communicated to the board.
• Phased cost-reduction playbook documented with explicit trigger dates.

Anti-Patterns

• NEVER assume an existing investor will provide an emergency insider bridge round without a signed term sheet.
• NEVER wait until 4 months of runway remain before initiating cost reductions.
• NEVER include accounts receivable in immediate cash runway calculations without applying a bad-debt discount.