Plan startup cash runway with hiring timeline, revenue ramp, and funding milestones on an interactive Gantt-like timeline.
Runway is how many months your cash survives your burn rate, and the planner exists so you know that number before a hire or a round changes it. You enter starting cash, monthly operating costs, planned hires with start months, a revenue ramp, and funding rounds; the tool lays them on a month-by-month Gantt-style timeline and carries the cash balance forward month by month to the cash-out month. Most people get it wrong: runway is not one number. Every hire start date and funding date moves the cash-out month, and the timeline exists to make those shifts visible. The plan runs entirely in your browser; nothing is uploaded.
A concrete input and expected output from the current implementation.
Input
Starting cash: $100,000. Operating costs: $15,000/month. Revenue: $5,000/month from month 1. Hire: 1 engineer, month 3, +$6,000/month. Funding: none.
Expected output
Runway: 7 months. Cash reaches $0 at the end of month 7. Net burn is $10,000/month for months 1-2 (costs minus revenue) and $16,000/month from month 3 once the hire adds $6,000 to monthly costs.
Each month nets costs against revenue: $15,000 - $5,000 = $10,000 for months 1-2, then $21,000 - $5,000 = $16,000 after the hire. The $80,000 left after two months of $10,000 burn is exhausted by $16,000 per month in exactly five months, so the hire shortens runway from 10 months to 7.
The model starts from your opening balance and walks the timeline month by month. Each month adds revenue and funding receipts and subtracts operating costs plus the salaries of any hires whose start month has arrived. Cash-out is the first month the running balance hits zero. Each input takes effect in its start month rather than being spread evenly across the year.
Hires, funding rounds, and revenue milestones are drawn as bars or markers along a monthly grid, with the projected cash line and the cash-out month beneath. Because the chart and the cash projection are two views of the same inputs, changing a hire's start month or a round's amount redraws both and moves the cash-out month accordingly. The timeline is the model, not an illustration.
Because each salary starts when the hire starts, not on day one. A yearly budget spreads salary cost evenly across 12 months, which spends the money earlier than it actually leaves the account. The planner charges each hire only from its start month, so the cash-out month depends on when hires begin, not on how many salaries the budget contains.
Yes - that is the plainest configuration. With the revenue ramp left at zero, each month subtracts only costs from the balance, and runway reduces to starting cash divided by monthly burn. Most pre-revenue plans are exactly this shape, and adding a ramp later shows how much of the runway the revenue buys back.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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