A guessed runway is worse than no runway.
A wrong number makes you confident.
For founders who want to know how long they actually have. A model that is three months stale still displays a number. This playbook is how long you actually have, what really changes it, and how to stop finding out late.
// 31 PAGES · FIVE PARTS · THREE CHECKLISTS · FREE
Seven things to know about runway.
Each is a mechanism you can plan around, and the guide is plain about the limit: a model is only as good as the upkeep behind it.
It is the deadline that sets every other deadline
Startups do not really have a strategy problem, they have a sequencing problem: too many worthwhile things and not enough time to do them before the money is gone.
It determines your fundraising leverage, which is worth more than your pitch
The single largest factor in how a fundraise goes is not the deck, the traction or the narrative — it is whether you can walk away.
It converts burn from an accident into a decision
Most spending in a small company is not decided; it accumulates. A tool here, a contractor there, a subscription nobody cancelled, a cloud bill that grew, a hire made in an optimistic month.
It tells you what you are allowed to decide
Different runway lengths permit genuinely different strategies, and the mistake founders make is running a strategy their runway cannot support.
It prices every hire in the currency that actually matters
A hire has a salary, and a salary is an abstraction. What a hire really costs is *months*, and that number is immediate and concrete: this person shortens our runway by this much, so they need to produce something worth that much time before the clock runs out.
It is the earliest warning system you have
Almost every serious problem in a company shows up in the cash before it shows up anywhere else. Churn rising, sales slowing, a cost quietly compounding, collections slipping — each of them moves the runway number weeks or months before it becomes obvious in any other report.
And now the honest limit
Runway is a forecast, and forecasts age. It rests on assumptions about revenue that may not hold, spending that will surprise you, and timing that is lumpier than any average suggests.
Five parts, and a last page.
Parts one to five are the thinking and the doing, worth your time even if you never touch a piece of software. The last pages show how to keep the number current.
The honest case for knowing the number
Decide what you are counting
Build it simply
Use it
The checklists and the mistakes
Do it all in one place
Nine mistakes, all of them avoidable.
None is about finance skill. They are failures of upkeep and honesty, which is good news, because both can be set up in advance.
Quoting a number nobody has defined
Gross or net, cash or accrual, which window, whose plan. Two correct numbers that disagree produce a company that trusts neither and steers by neither.
Counting money that has not arrived
Committed, invoiced, awarded, facilitated and promised are all words for *not yet in the bank*. Every founder surprised by their own runway made this merge somewhere.
Using last month as the burn rate
One month is noise. A single annual bill or one large receipt will hand you a number that is wrong by months in either direction.
Baking optimistic pipeline into the base case
It is nearly always self-inflicted and nearly always invisible to the person who did it, because they built it on a good day. Contracted and probable only.
Never calculating planned burn
Current burn is the comfortable number and the plan is the real one. Founders who only run current burn are steering by a number they have already decided not to follow.
Waiting one more month before starting the raise
The most expensive habit in this guide. Leverage falls with the runway, and the moment will never feel convenient.
Cutting people first
It looks decisive and it is the most damaging, least reversible lever available. Unused spend and unchased invoices routinely produce months at almost no cost, and almost nobody works that order.
Only investigating bad news
An improvement that is actually a deferral will comfort you for exactly as long as it takes to arrive anyway, and it will arrive in a worse month.
Hiding the number from the team
People make poor decisions without knowing the constraint, and they forgive a hard number far more readily than they forgive discovering one was concealed.
Thirty-one pages.
Yours in one click.
Five parts, three checklists and the nine mistakes. One email with the link, no drip sequence, and we do not sell the list.