Runway
Cash runway is the time until available cash reaches zero under an explicit burn and income assumption. If costs are changing, a fixed cash ÷ burn estimate can be misleading.
Live model
Enter your assumptions to see an estimate. Use source view to inspect or change the calculation. Your inputs stay in this browser.
template: runway savings = 30000 in usd monthly_burn = 2800 in usd monthly_income = 600 in usd burn_change_rate = 3%
Inputs
Method
net_burn = monthly_burn - monthly_incomesimple_runway = starting_cash / net_burnchanging-burn runway is found by projecting each month until balance ≤ 0The inputs and source use the same model. Open it in Continuum for a document you can keep and revisit.
Worked example
The useful question is not only the depletion month. It is when to cut costs, replace income, or stop treating the current plan as safe.
Questions
Only when there is no income and costs are flat. With recurring income, use net burn. With changing costs or irregular cash events, project the balance over time.
The simple depletion case no longer applies because the modeled balance is not shrinking. Stress-test whether the income is durable instead.
Update whenever cash, recurring income, or the cost structure changes materially. During a constrained period, monthly review is often more useful than an annual budget.
Keep the reasoning
The full template opens as a local Continuum document. Edit every assumption, explore the result breakdown, and keep the source.
Open cash runway calculator