Base — your inputs as-is
Runway
15+ mo
default alive
Gross burn
$120,000
/ month (base)
Net burn (today)
$100,000
/ month
Need to raise
$0
to reach 24mo
Effective spend
$120,000
your inputs
Effective growth
8.0%
/ month
Projected cash balance
next 48 moAI explainer
Ask anything about your result
The math above is deterministic. AI explains what it means — it never recalculates the numbers.
About
How many months of cash do you have? Plug in your bank balance, monthly spend, MRR, and growth rate to see when you run out — with revenue growth factored in, not just burn divided by cash.
How it works
- 01Enter cash in bank and gross monthly burn.
- 02Add current MRR and your expected monthly MRR growth rate.
- 03We project cash month-by-month: each month you spend gross burn, earn growing MRR, and net the difference against cash.
- 04Runway is the month your balance hits zero — or 'default alive' if MRR overtakes burn first.
Examples
Default alive
$1.5M cash, $120k spend, $20k MRR growing 8%/month. MRR overtakes burn around month 22 and the company never runs out — that's 'default alive'.
Tight 12 months
$1M cash, $150k spend, $10k MRR, 3% growth. You hit zero around month 10. Either raise, cut burn, or accelerate growth — pick fast.
FAQ
What's gross vs net burn?+
Gross burn = total monthly spend. Net burn = gross burn minus revenue. Both matter: net burn drives runway, gross burn drives the size of your next raise.
Should I model collections lag?+
For SaaS with annual prepays, MRR overstates cash inflow. As a hack, use 90% of MRR or model in your spreadsheet. We use MRR as a direct cash proxy here.
What growth rate should I use?+
Use a conservative trailing 3–6 month average. Investors will discount aggressive forecasts; founders should plan for the low case.
Does this model fundraises?+
No — it's a pure cash-out projection. To model a raise, add the raise amount to 'cash in bank' and rerun.