Official skill · Finance
Cash runway update
Writes a cash runway update: cash, 3-month average net burn, runway in months, base, downside and upside scenarios, and levers, formulas shown. Use it when monthly, after the books close.
AI skill
Have your AI report how many months of cash you have left
14 days free · No card needed
Works in Claude, ChatGPT, and coding agents. On Team and Business, the official skill in your pod updates itself when we improve it.
When to use it
- Monthly, after the books close
- Before a fundraise, a hiring plan, or a big spend
What you give it
- Cash on hand at month end
- Cash in and out for 3 months
- Confirmed changes ahead and stated risks
What you get
A runway update with the burn table, runway formula, 3 scenarios, and levers that extend runway.
How it works
- State cash on hand
- Compute net burn
- Compute runway
- Build 3 scenarios
- List the levers
- Write the headline
Example
What you give it
> Ferro Labs. Cash at 31 Aug: 1,240,000. > Jun: in 95,000, out 205,000. Jul: in 102,000, out 214,000. Aug: in 98,000, out 228,000. > Signed: 1 engineer starts 1 Oct, 11,000 per month all-in. Risk: largest customer (18,000 per month) may not renew in Nov. Possible: annual prepay offer to 5 customers, amount not known.
What you get back (the start of it)
Runway update — August
Headline: 9.7 months of runway in the base case; cash runs out in June next year.
Cash
Cash on hand at 31 August: 1,240,000 (all accounts given)
Burn
| Month | Cash in | Cash out | Net burn |
|---|---|---|---|
| June | 95,000 | 205,000 | 110,000 |
| July | 102,000 | 214,000 | 112,000 |
| August | 98,000 | 228,000 | 130,000 |
| 3-month average | 117,333 |
The rest of this output, the full steps and the checks the AI runs before it answers are in your pod once you add the skill.
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Changelog
- v1.0.0 · · First release.
Sources
- Default Alive or Default Dead? (read 2026-11-04)
- What is burn rate? What startups need to know about this key metric (read 2026-11-04)
- Burn rate calculator: Calculate your Burn rate and startup runway (read 2026-11-04)
- 16 Startup Metrics | Andreessen Horowitz (read 2026-11-04)