Interest Rate to Use for Present Value Calculation

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Business Runway & Burn Rate Calculator

Calculate how many months your business can survive at current spending levels.

Net Monthly Burn Rate:
Estimated Business Runway:

Understanding Business Runway and Burn Rate

For startups and small businesses, runway is the amount of time the company has before it runs out of money, assuming income and expenses remain constant. It is one of the most critical metrics for founders to monitor, as it dictates how much time you have to achieve profitability or secure the next round of funding.

How to Calculate Your Burn Rate

Your Gross Burn Rate is the total amount of spending each month. However, for most businesses, the Net Burn Rate is more important. This is calculated as:

Net Burn Rate = (Fixed Expenses + Variable Expenses) - Gross Revenue

If your expenses are $10,000 and your revenue is $4,000, your net burn rate is $6,000 per month.

The Formula for Business Runway

Once you know your net burn, the runway formula is simple:

Runway (Months) = Current Cash Balance / Net Monthly Burn Rate

Example Calculation

Metric Amount
Cash on Hand $100,000
Total Monthly Expenses $15,000
Monthly Revenue $5,000
Calculated Runway 10 Months

Strategies to Extend Your Runway

  • Reduce Fixed Costs: Evaluate office space needs or software subscriptions.
  • Increase Lead Generation: Focus on high-ROI marketing channels to boost revenue.
  • Improve AR: Speed up your Accounts Receivable to get cash in the door faster.
  • Pivot Pricing: Adjusting your price point can sometimes reduce the burn rate without increasing costs.
function calculateBusinessRunway() { var cash = parseFloat(document.getElementById("cashBalance").value); var revenue = parseFloat(document.getElementById("monthlyRevenue").value) || 0; var fixed = parseFloat(document.getElementById("fixedExpenses").value) || 0; var variable = parseFloat(document.getElementById("variableExpenses").value) || 0; if (isNaN(cash) || cash < 0) { alert("Please enter a valid current cash balance."); return; } var totalExpenses = fixed + variable; var netBurn = totalExpenses – revenue; var resultDiv = document.getElementById("runwayResult"); var burnOutput = document.getElementById("burnRateOutput"); var runwayOutput = document.getElementById("runwayOutput"); var messageOutput = document.getElementById("runwayMessage"); resultDiv.style.display = "block"; if (netBurn <= 0) { burnOutput.innerHTML = "$0 (Profitable or Breakeven)"; runwayOutput.innerHTML = "Infinite"; messageOutput.innerHTML = "Congratulations! Your business is generating more cash than it spends. You are 'default alive'."; messageOutput.style.color = "#27ae60"; } else { var months = cash / netBurn; burnOutput.innerHTML = "$" + netBurn.toLocaleString(undefined, {minimumFractionDigits: 2, maximumFractionDigits: 2}); runwayOutput.innerHTML = months.toFixed(1) + " Months"; if (months < 6) { messageOutput.innerHTML = "Warning: Your runway is less than 6 months. It may be time to cut costs or seek funding."; messageOutput.style.color = "#e74c3c"; } else if (months < 12) { messageOutput.innerHTML = "Your runway is stable, but keep a close eye on your growth metrics."; messageOutput.style.color = "#f39c12"; } else { messageOutput.innerHTML = "You have a healthy runway. Focus on sustainable scaling."; messageOutput.style.color = "#27ae60"; } } }

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