Default Alive

What is Default Alive?

Default Alive is a startup planning concept popularized by Paul Graham. It asks whether a company appears able to become profitable before its available cash is exhausted, assuming a stated path for revenue, spending, and other operating inputs.

The question is forward-looking. Current cash and burn establish the starting position, while the model describes how revenue and costs may change. If the modeled path reaches break-even before the modeled cash-out date, the company is default alive under those assumptions. If the cash floor arrives first, the company is default dead under that model.

The label is conditional rather than permanent. Revenue growth can slow, payroll can increase, a commitment can begin, or costs can be reduced. Each change can move the projected break-even point or cash-out date. A useful classification therefore names the assumptions and the period reviewed instead of presenting the result as certainty.

Default Alive is not the same as runway

Runway estimates how long a selected cash position may last under a defined burn or timing model. Default Alive compares two modeled events: reaching profitability and reaching the cash floor.

A company can have a long runway but still remain default dead if its modeled costs continue to exceed revenue beyond the cash-out date. A company with less runway could be default alive if the stated path reaches sustainable break-even first.

Default Alive is not the same as break-even

Break-even describes the point where a defined measure of revenue equals a defined measure of cost. Default Alive adds a cash constraint: does the modeled business reach that point before its cash is exhausted?

The definitions used for profitability, cash, and spending must remain consistent. Accounting profit, operating cash flow, and cash-flow break-even are related but are not interchangeable.

What can change the answer?

• Revenue trajectory

  Growth, churn, pricing, collection timing, and the distinction between modeled revenue and received cash can alter the path.

• Spending trajectory

  Hiring, compensation, tools, commitments, taxes, and one-time costs can move the cash-out date or break-even point.

• Starting cash and financing

  Recorded cash and a completed financing can change the starting position. An unclosed fundraise should not be treated as cash already available.

• Model horizon and definitions

  The result depends on how far the model extends and which definition of profitability and available cash it uses.

Why it matters

Runway can show that a company has time without showing that the current path becomes self-sustaining. Default Alive adds a useful strategic question: does the modeled operating trajectory reach profitability before the cash constraint becomes binding?

The answer can frame a planning conversation about hiring, pricing, spending, growth, and financing. It should not make the decision automatically. Leaders still need to assess the credibility of the assumptions, the range of possible outcomes, and the cost of being wrong.

Conceptual test, not a prediction

• The defined starting cash position and any included financing already completed
• The spending trajectory, including planned changes and dated obligations
• The revenue trajectory and the assumptions that produce it
• A consistent definition of profitability or break-even
• The model horizon and timing conventions

Conceptual test, not a prediction

Modeled break-even date < Modeled cash-out date

Illustrative example

How RunwayCal helps

Common mistakes

• 1Treating Default Alive as a guarantee rather than a conditional model result.
• 2Using runway alone without modeling the revenue and cost path to break-even.
• 3Treating expected revenue or an unclosed financing as cash already received.
• 4Hiding the profitability definition, time horizon, or assumptions behind the label.