Runway & burn
Net monthly burn, months of runway, and an estimated cash-out date, from your bank's complete cash flows, with Ramp explaining what's driving the number.
- Install
all-systems-go- Ask
- “What's our runway?” or
/runway-and-burn - Reads
- Mercury, Ramp, Stripe — read-only, with your own login
- Works best with
- A Finance Brain: this tool reads your definitions first
- Time
- A minute or two per run
What you get
- A headline: “≈ X months of runway (net burn ≈ $Y/mo, cash ≈ $Z as of
)." - A monthly table of outflows, inflows, and net burn, so you can check the math.
- The trend and its drivers: is burn rising or falling, and which vendors or categories are moving it.
- Caveats: one-time items, excluded accounts, cash vs. accrual.
How it calculates
- The bank is the source of truth for burn. Mercury sees every dollar out: payroll, taxes, card settlements, wires. Card spend alone understates burn, often badly, so Ramp is used to explain the burn, never to total it.
- Your definitions come from your Finance Brain: which accounts count as runway cash, which transfers are internal, how you define burn.
- Trailing three full months by default. Net burn is outflows minus inflows, and runway is current cash divided by net burn.
- The arithmetic runs in a computation step, never by eye, and every number shows its work.
Try asking
Use the trailing three full months and show the monthly burn table.
Why did burn change this month?
Install
You'll need Claude Cowork (the Cowork tab in the Claude desktop app, on a Pro, Max, Team, or Enterprise plan). Everything installs from inside Cowork — no command line.
- Add the airCFO marketplace (once — skip this if you've installed any airCFO tool before): click Customize in the left sidebar, then Browse plugins → Personal → + → Add marketplace from GitHub, and enter
https://github.com/aircfo/claude-startup-finance - Install
all-systems-go. Already installed? Click Update on the marketplace instead, so you have the latest version. - Work from your Finance Brain if you have one: open the folder with Work in a folder so the tool reads your definitions. No Finance Brain yet? Download the free starter kit.
- Ask:
What's our runway?
Missing one of the systems above? The tool still runs. Whatever it couldn't read shows up as an open question, never a guess.