Business Runway Calculator
Enter cash reserves, monthly revenue, monthly expenses, one-time upcoming costs, cost-cut target, growth scenario, and fundraising amount. See net burn, runway now, runway if revenue stops, runway with cost cuts, runway with fundraising, break-even target, and months to break-even at growth rate. Plan cash before you need it.
Instant calculations · Editable fee assumptions · Export-ready results
Inputs
Values update results instantly. Adjust fee assumptions to match your seller dashboard.
Starting position
Available cash today
Monthly cash flow
Average monthly revenue
Total monthly expenses
Scenarios
If revenue stopped entirely, monthly burn (auto-calculated if 0)
Upcoming one-time costs (tax bill, equipment, etc.)
What % could you cut if needed
Monthly revenue growth to reach break-even
Additional cash you could raise
Results
Live estimates based on your inputs and editable fee assumptions.
Net burn rate
$5,000.00
Expenses minus revenue monthly.
Effective reserves after one-time
$22,500.00
Cash minus upcoming one-time costs.
Current runway (months)
4.50
Effective reserves divided by net burn.
Runway if revenue stopped
2.05
Runway with zero revenue.
Runway with cost cut
5.77
Runway after applying cost cut.
Runway with fundraising
4.50
Runway including additional capital.
Break-even revenue needed
$11,000.00
Revenue to cover monthly expenses.
Months to break-even at growth rate
999
How long to reach break-even with growth.
What this means
Cash $25000 − $2500 one-time = $22500 effective. Burn $5000/mo. Runway 4.5 months. Zero rev 2.0 mo. Cut 10% → 5.8 mo. Raise $0 → 4.5 mo. Break-even $11000.
Runway under different scenarios
Interactive breakdown of fees, costs, and remaining profit.
Distribution
- Current$4.5026.8%
- Zero revenue$2.0512.2%
- With 10% cut$5.7734.3%
- With raise$4.5026.8%
Total $16.81 · 4 segments · interactive
Line-item breakdown
Dollar amounts, share of revenue, and visual proportion.
- Current cash
- $25,000.00
- One-time costs
- $2,500.00
- Effective reserves
- $22,500.00
- Net burn monthly
- $5,000.00
- Current runway months
- 4.50
- Zero revenue runway
- 2.05
- Runway with cost cut
- 5.77
- Runway with fundraising
- 4.50
- Break-even revenue
- $11,000.00
- Months to break-even
- 999
Assumptions used
- • Net burn $5000.00 = $11000.00 − $6000.00
- • Effective $22500.00 = $25000.00 − $2500.00
- • Current runway 22500.00/5000.00 = 4.5mo
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Business Runway Calculator
Generated 8/4/2026, 2:51:58 PM · Currency USD
Inputs
- Current cash in bank: 25000
- Monthly revenue: 6000
- Monthly expenses (all costs): 11000
- Monthly burn if revenue stopped (0 = auto): 0
- Upcoming one-time costs: 2500
- Cost cut target % if needed: 10
- Monthly revenue growth % to break-even: 0
- Potential fundraising / loan amount: 0
Results
- Current cash: $25,000.00
- One-time costs: $2,500.00
- Effective reserves: $22,500.00
- Net burn monthly: $5,000.00
- Current runway months: 4.50
- Zero revenue runway: 2.05
- Runway with cost cut: 5.77
- Runway with fundraising: 4.50
- Break-even revenue: $11,000.00
- Months to break-even: 999
Interpretation
Cash $25000 − $2500 one-time = $22500 effective. Burn $5000/mo. Runway 4.5 months. Zero rev 2.0 mo. Cut 10% → 5.8 mo. Raise $0 → 4.5 mo. Break-even $11000.
How it works
Methodology & formulas
This calculator is transparent by design. Review the steps and formulas so you can trust the estimate and adjust assumptions when your dashboard differs.
Calculation steps
- 1Calculate net burn as expenses minus revenue when burning.
- 2Subtract one-time costs from cash for true available.
- 3Divide effective reserves by burn for runway months and weeks.
- 4Model zero revenue, cost cut, and fundraising scenarios separately.
- 5Solve for break-even months using log: months = ln(breakEven/currentRev)/ln(1+growth).
Formulas
- netBurn = max(0, expenses − revenue)
- effective = cash − oneTime
- runway = effective / netBurn
- zeroRevRunway = effective / monthlyExpenseBurnOnly or expenses
- cutRunway = effective / (expenses×(1−cut%) − revenue)
- raiseRunway = (cash+raise−oneTime)/netBurn
- breakEvenRev = monthlyExpenses
- monthsToBE = ln(BE/rev)/ln(1+growth%)
Important assumptions
- Net burn = monthlyExpenses − monthlyRevenue if positive else 0.
- Effective reserves = currentCash − oneTimeExpenses.
- Current runway = effectiveReserves / netBurn.
- Zero revenue runway = effectiveReserves / monthlyExpenses or burnOnly if provided.
- Cost cut runway = effectiveReserves / (expenses×(1−cut%) − revenue).
- Fundraising runway = (reserves+fundraise−oneTime)/netBurn.
- Break-even revenue = monthlyExpenses.
- Months to break-even solves revenue×(1+growth)^n = expenses.
Worked example
$25K cash, $6K revenue, $11K expenses
$25K cash, $6K revenue, $11K expenses = $5K burn. $2.5K one-time leaves $22.5K. Runway 4.5 months. Zero rev $22.5K/$11K=2 months. 10% cut runway $22.5K/$3.9K=5.8 months. With $50K raise, $72.5K/$5K=14.5 months. Break-even needs $11K revenue, $5K more. At 10%/mo growth break-even in ~6.4 months.
FAQ
Common questions
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