Runway Trigger: A 3-Scenario Calculator for Pre-Revenue Founders

You are staring at a bank balance and a spreadsheet that refuses to feel reassuring. The question is whether the next dollar has a job. Founders should start a fundraise when they have 6-9 months of runway left, and a typical fundraising cycle takes 3-6 months before cash arrives. A runway trigger card is a small spreadsheet with a rule attached: it forces a decision before fear makes the decision for you.

With no customers yet, the plan cannot lean on revenue. It can only lean on fixed cost, cash left, and a trigger. Before a paying user shows up, the work is cash discipline.

Build the trigger card before the money gets low

Paul Graham is credited with creating the startup labels 'default alive' and 'default dead' to separate companies that become cash-flow positive before cash exhaustion from companies that fail without intervention. Your trigger should decide which path you are on before the cash decides it.

• Fixed monthly cost: a defensible number that includes salaries, tools, rent, insurance, and the small bills you keep forgetting.
• Three assumptions: optimistic, base, and worst, each with months of runway and lines that change only when a real input changes.
• Trigger months: start a raise at 9 months, cut if the worst case is under 6 months, and treat 3 months as emergency.

Optimistic is your best plausible month, base is your normal month, and worst is the month where hiring stalls, a contract slips, and a tool bill creeps up.

Do not let revenue enter this card yet. Adding a revenue line makes it large enough to feel safe. Keep the card about cash leaving, not revenue arriving.

Keep the card short. If it needs another page, the card is too complicated. Put the fixed cost at the top, the trigger months under it, and the owner of each line next to it.

Review the card monthly. Put a note in your calendar and run a quick check: cash, fixed cost, trigger month. If the trigger month moves, write down why.

The raise window is the real deadline

Start the raise at 9 months, the top of the fundraise window, so you are not raising from fear.

Raise for 18-24 months of runway. Add a 10-20% buffer to the budget. The buffer covers the month that does not go as planned.

Founders should hold at least 18-21 months of runway, and the longest average gap was 22 months, occurring between most Series B and Series C rounds.

Divide cash by fixed monthly cost for your base runway, then run the same division under each assumption. The spread between the lines tells you what the plan can absorb.

The cut rule keeps you honest

Treat the base case as a guess. One survey found 55% of startup founders had fewer than 6 months of runway remaining. If your worst case drops below 6 months, cut. Cut the slow hire, the extra seat, the experiment that has not earned another month.

A finished card has a written list of what you will stop spending before anything else. A cut you cannot name is not planned. The list should be boring: a service, a seat, a paid tool, a slow contract, a deferred hire.

Early cuts keep options open. Late cuts force you to choose between bad things.

The emergency rule is the final warning

Paul Graham and Peter Sandberg are cited as holding that the startup runway red zone starts at 3 months. At 3 months, the next raise becomes a crisis task. Tell your board, your key hires, and your biggest potential customers what you need and by when.

Ready means a dated list of conversations, a cash count, and a clear decision to proceed or stop. It should include the amount you need and the date you need it. Reaching this point with no plan means the raise is already lost.