Dental Practice Value Calculator

Dental Practice Value Calculator: Estimate Your Practice's Worth body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: #333; background-color: #f8f9fa; margin: 0; padding: 0; } .container { max-width: 1000px; margin: 30px auto; padding: 25px; background-color: #ffffff; box-shadow: 0 0 15px rgba(0, 0, 0, 0.05); border-radius: 8px; } h1, h2, h3 { color: #004a99; text-align: center; margin-bottom: 1.5em; } h1 { font-size: 2.5em; } h2 { font-size: 2em; margin-top: 1.2em; } h3 { font-size: 1.5em; margin-top: 1em; } .loan-calc-container { background-color: #eef3f7; padding: 30px; border-radius: 8px; margin-bottom: 30px; box-shadow: inset 0 1px 3px rgba(0,0,0,0.05); } .input-group { margin-bottom: 20px; text-align: left; } .input-group label { display: block; margin-bottom: 8px; font-weight: 600; color: #004a99; } .input-group input[type="number"], .input-group input[type="text"], .input-group select { width: calc(100% – 22px); padding: 12px 10px; border: 1px solid #ccc; border-radius: 5px; font-size: 1em; box-sizing: border-box; transition: border-color 0.2s ease-in-out; } .input-group input[type="number"]:focus, .input-group input[type="text"]:focus, .input-group select:focus { border-color: #004a99; outline: none; box-shadow: 0 0 0 3px rgba(0, 74, 153, 0.2); } .input-group .helper-text { font-size: 0.85em; color: #666; margin-top: 5px; display: block; } .error-message { color: #dc3545; font-size: 0.85em; margin-top: 5px; display: block; min-height: 1.2em; } .results-container { background-color: #ffffff; padding: 30px; border-radius: 8px; margin-top: 30px; box-shadow: 0 2px 10px rgba(0,0,0,0.08); text-align: center; } .results-container h3 { margin-top: 0; color: #333; } .primary-result { font-size: 2.5em; font-weight: bold; color: #28a745; margin: 15px 0; padding: 15px; background-color: #e8f5e9; border-radius: 6px; border: 1px solid #28a745; } .intermediate-results { display: flex; justify-content: space-around; flex-wrap: wrap; margin: 25px 0; } .intermediate-result-item { text-align: center; margin: 10px 5px; padding: 10px 15px; background-color: #f0f5fa; border-radius: 5px; border: 1px solid #d0e0f0; } .intermediate-result-item strong { display: block; font-size: 1.3em; color: #004a99; margin-bottom: 5px; } .intermediate-result-item span { font-size: 0.9em; color: #555; } .formula-explanation { font-size: 0.9em; color: #666; margin-top: 20px; padding-top: 15px; border-top: 1px dashed #ccc; } .button-group { margin-top: 25px; text-align: center; } .btn { padding: 12px 25px; margin: 0 8px; border: none; border-radius: 5px; font-size: 1em; cursor: pointer; transition: background-color 0.2s ease, transform 0.1s ease; font-weight: 600; } .btn-primary { background-color: #004a99; color: white; } .btn-primary:hover { background-color: #003366; } .btn-secondary { background-color: #6c757d; color: white; } .btn-secondary:hover { background-color: #5a6268; } .btn-reset { background-color: #ffc107; color: #212529; } .btn-reset:hover { background-color: #e0a800; } .btn:active { transform: translateY(1px); } table { width: 100%; margin-top: 30px; border-collapse: collapse; box-shadow: 0 1px 5px rgba(0,0,0,0.1); } th, td { padding: 12px 15px; text-align: left; border-bottom: 1px solid #ddd; } th { background-color: #004a99; color: white; font-weight: bold; } td { background-color: #fdfdfd; } tr:nth-child(even) td { background-color: #f6f9fc; } caption { font-size: 1.1em; font-weight: bold; color: #004a99; margin-bottom: 10px; caption-side: top; text-align: left; } canvas { display: block; margin: 30px auto; max-width: 100%; background-color: #fff; border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); } .article-content { margin-top: 40px; background-color: #ffffff; padding: 30px; border-radius: 8px; box-shadow: 0 0 15px rgba(0, 0, 0, 0.05); } .article-content p, .article-content ul, .article-content ol { margin-bottom: 1.2em; } .article-content li { margin-bottom: 0.5em; } .article-content a { color: #004a99; text-decoration: none; } .article-content a:hover { text-decoration: underline; } .faq-item { margin-bottom: 15px; padding: 10px; border-left: 3px solid #004a99; background-color: #f0f5fa; border-radius: 4px; } .faq-item strong { display: block; color: #004a99; margin-bottom: 5px; } .related-links ul { list-style: none; padding: 0; } .related-links li { margin-bottom: 10px; } .related-links a { font-weight: bold; }

Dental Practice Value Calculator

Estimate the market value of your dental practice with this comprehensive tool.

Practice Valuation Inputs

Enter the total revenue generated by the practice in USD.
Earnings Before Interest, Taxes, Depreciation, and Amortization as a percentage of revenue.
Total number of fully equipped operatories.
How long the practice has been in operation.
The amount the owner dentist currently takes from the practice.
0.5x – 0.7x (Early Stage/Lower Profitability) 0.7x – 0.9x (Growth/Moderate Profitability) 0.9x – 1.1x (Established/Good Profitability) 1.1x – 1.3x (High Profitability/Strong Market Position) 1.3x – 1.5x (Exceptional Practice/High Demand) A general multiplier based on industry benchmarks. Adjust based on your specific practice characteristics.

Valuation Results

Annual EBITDA
Adjusted EBITDA
Value per Chair
Valuation Method: Based on Adjusted EBITDA Multiplied by Industry Multiple.

Formula: (Annual Gross Revenue * EBITDA Margin %) * Industry Valuation Multiple = Estimated Practice Value

*Note: This is a simplified model. Actual practice value is determined by many factors and professional appraisal.*

Enter practice details and click "Calculate Value" to see your estimated practice worth.

Valuation Metrics Analysis

Comparison of Estimated Value Drivers.

Key Valuation Components
Component Description Impact on Value
Annual Gross Revenue Total income generated by the practice. Positive (Higher revenue = Higher value)
EBITDA Margin Profitability before interest, taxes, depreciation, and amortization. Positive (Higher margin = Higher value)
Adjusted EBITDA EBITDA adjusted for non-recurring or discretionary owner expenses. Positive (Higher adjusted EBITDA = Higher value)
Valuation Multiple Industry benchmark multiplier reflecting practice's market position, growth, and profitability. Positive (Higher multiple = Higher value)
Practice Age Longevity and stability of the practice. Generally Positive (Older, stable practices often valued higher)
Operatory Chairs Capacity for patient treatment. Positive (More chairs can indicate higher revenue potential)

What is Dental Practice Value?

{primary_keyword} is the estimated worth of a dental practice as a business entity. It's not merely the sum of its physical assets (like equipment and real estate), but rather a calculation of its earning potential, market position, patient base, goodwill, and future cash flow. Understanding your dental practice value is crucial for several reasons: for potential sale or acquisition, for strategic planning, for securing financing, for partnership discussions, or even for estate planning. Many dentists new to practice ownership, or those considering a transition, often underestimate the complexity involved in accurately assessing a practice's true market value. A common misconception is that value is simply a multiple of the dentist's annual income or the total collections. While these are factors, a comprehensive valuation considers profitability, operational efficiency, growth potential, and intangible assets.

Dental Practice Value Formula and Mathematical Explanation

The core of a dental practice value calculator often relies on assessing the practice's profitability and then applying an industry-standard multiple. A widely used metric is Earnings Before Interest, Taxes, Depreciation, and Amortization (EBITDA), which provides a measure of operational profitability. However, for valuations, we often use Adjusted EBITDA, as it normalizes for owner-specific expenses or non-recurring items that might inflate or deflate the true earning capacity of the practice.

The fundamental formula looks like this:

Estimated Practice Value = Adjusted EBITDA × Valuation Multiple

Let's break down the components:

  1. Annual Gross Revenue (AGR): The total amount of money the practice collected from patient services in a given year.
  2. EBITDA Margin (%): This is calculated as (EBITDA / Annual Gross Revenue) × 100. It shows how much profit a practice makes for every dollar of revenue after accounting for operational expenses but before financing and non-cash charges.
  3. EBITDA: Calculated by taking the Annual Gross Revenue and subtracting all operating expenses (excluding interest, taxes, depreciation, and amortization).
    EBITDA = Annual Gross Revenue - Operating Expenses (excluding interest, taxes, D&A)
  4. Adjusted EBITDA: This is where we refine EBITDA. We add back or subtract specific items to reflect the true economic benefit to a new owner. Common adjustments include:
    • Adding back discretionary owner expenses (e.g., excessive owner salary/draw above market rate, personal expenses run through the business, family member salaries not performing a necessary role).
    • Adding back non-recurring expenses (e.g., one-time legal fees for a lawsuit, costs of a major equipment upgrade that isn't routine).
    • Subtracting any necessary capital expenditures if not already accounted for in depreciation.

    Adjusted EBITDA = EBITDA + Owner Discretionary Expenses - Non-Recurring Expenses
  5. Valuation Multiple: This is a multiplier derived from industry benchmarks, transaction data, and market conditions. It reflects the risk and growth potential of the practice. A higher multiple indicates a more desirable practice. Factors influencing the multiple include profitability, patient retention, service mix, location, technology, and staff quality.
Valuation Variables and Ranges
Variable Meaning Unit Typical Range
Annual Gross Revenue Total revenue from patient services USD $200,000 – $2,000,000+
EBITDA Margin Operating profit as % of revenue % 15% – 40%
EBITDA Earnings before interest, taxes, depreciation, amortization USD Varies based on revenue and margin
Adjusted EBITDA Normalized profitability for valuation USD Varies based on adjustments
Valuation Multiple Industry benchmark multiplier Ratio (e.g., 1.0x) 0.5x – 1.5x+ (highly variable)
Practice Age Years of operation Years 1 – 50+
Operatory Chairs Number of treatment rooms Count 1 – 10+
Owner Dentist Salary Dentist's personal compensation USD $100,000 – $300,000+

Practical Examples (Real-World Use Cases)

Let's illustrate how the dental practice value calculator works with two distinct examples:

Example 1: Established, Profitable Practice

Dr. Anya has a well-regarded general dentistry practice that has been serving the community for 20 years. She is considering retirement and wants to get a realistic valuation.

  • Annual Gross Revenue: $750,000
  • EBITDA Margin: 30%
  • Number of Operatory Chairs: 5
  • Practice Age: 20 years
  • Owner Dentist's Salary: $200,000 (market rate for her role)
  • Industry Valuation Multiple: 1.1x (typical for a stable, profitable practice)

Calculation:

  • EBITDA = $750,000 × 30% = $225,000
  • Adjusted EBITDA = $225,000 (Assuming owner's salary is reasonable and there are no other significant adjustments)
  • Estimated Practice Value = $225,000 × 1.1 = $247,500

Interpretation: Dr. Anya's practice is estimated to be worth approximately $247,500 based on these inputs. The multiple of 1.1x reflects its strong profitability and established position. The value per chair is $49,500 ($247,500 / 5 chairs).

Example 2: Growing Practice with High Owner Compensation

Dr. Ben runs a newer practice, 5 years old, with modern equipment and a focus on cosmetic dentistry. He's looking to bring on a partner and needs to establish a fair valuation.

  • Annual Gross Revenue: $600,000
  • EBITDA Margin: 25%
  • Number of Operatory Chairs: 4
  • Practice Age: 5 years
  • Owner Dentist's Salary: $300,000 (potentially high for the practice's revenue)
  • Industry Valuation Multiple: 0.9x (reflecting growth but also higher owner draw impacting immediate cash flow for a buyer)

Calculation:

  • EBITDA = $600,000 × 25% = $150,000
  • Adjusted EBITDA = $150,000 – ($300,000 – $200,000) = $50,000 (Assuming a market rate for the owner's role is $200,000, we add back the excess $100,000)
  • Estimated Practice Value = $50,000 × 0.9 = $45,000

Interpretation: Dr. Ben's practice has an estimated value of $45,000. This significantly lower value compared to the first example is primarily due to the high owner compensation. A buyer would see the practice's true earning potential as much lower once they have to pay themselves a market salary. The value per chair is $11,250 ($45,000 / 4 chairs). This highlights the critical importance of adjusting for owner compensation when determining dental practice value.

How to Use This Dental Practice Value Calculator

Using our dental practice value calculator is straightforward. Follow these steps to get an estimated valuation:

  1. Gather Financial Data: You'll need your most recent full year's financial statements, specifically your Profit and Loss (P&L) statement and ideally a breakdown of expenses.
  2. Input Annual Gross Revenue: Enter the total revenue collected by your practice in the "Annual Gross Revenue" field.
  3. Determine EBITDA Margin: Calculate your practice's EBITDA and divide it by your Annual Gross Revenue. Enter this percentage in the "EBITDA Margin (%)" field. If you're unsure, use industry averages (15%-40%) as a starting point, but accurate figures are best.
  4. Enter Other Key Metrics: Input the number of operatory chairs, the age of your practice, and your current owner dentist salary/draw.
  5. Select Valuation Multiple: Choose a valuation multiple from the dropdown that best reflects your practice's characteristics. Consider its profitability, growth prospects, patient loyalty, and competitive landscape. If unsure, consult with a dental practice broker or appraiser.
  6. Click "Calculate Value": The calculator will instantly provide your estimated practice value, along with key intermediate metrics like Annual EBITDA, Adjusted EBITDA, and Value per Chair.

Reading Your Results:

  • Primary Result: This is your estimated total practice value.
  • Intermediate Values: These provide insights into the components driving the valuation (EBITDA, Adjusted EBITDA, Value per Chair). Pay close attention to Adjusted EBITDA, as it's the basis for the multiple.
  • Value per Chair: Offers a comparative metric against industry norms.

Decision-Making Guidance: This tool provides an estimate. Use these results as a starting point for discussions with potential buyers, lenders, or partners. For a definitive valuation, always engage a professional practice appraiser or dental business broker. This calculator helps you understand the *drivers* of value, empowering you to improve your practice and increase its worth.

Key Factors That Affect Dental Practice Value Results

While our dental practice value calculator provides a solid estimate, several nuanced factors can significantly influence the actual market value of a dental practice. Understanding these is key to maximizing your practice's worth:

  1. Profitability and Cash Flow: This is paramount. Practices with consistently high net profit margins (reflected in a strong EBITDA margin) command higher valuations. Consistent, predictable cash flow reassures buyers of the practice's stability and ability to service debt or provide income.
  2. Owner Compensation and Adjustments: As seen in Example 2, overly high owner salaries or discretionary spending can artificially depress the apparent profitability. A buyer will re-evaluate the practice based on *their* expected compensation and necessary operational costs, meaning Adjusted EBITDA is the true measure. Read more about Adjusted EBITDA.
  3. Patient Base and Retention: A large, loyal patient base with a high retention rate is a significant asset. This indicates a stable revenue stream and a lower risk of losing patients post-acquisition. Practices with younger patient demographics or those actively growing their patient base may fetch higher multiples.
  4. Service Mix and Specialization: Practices offering a diverse range of services, especially high-margin procedures like implants, orthodontics, or cosmetic dentistry, are often valued more highly than those solely focused on basic preventative care. Specialization can create a niche market advantage.
  5. Location and Demographics: A practice located in a high-growth area with favorable demographics (e.g., higher disposable income, growing population) will generally be more valuable. Visibility, accessibility, and local competition also play a role.
  6. Technology and Modernity: Investment in up-to-date technology (digital X-rays, intraoral scanners, modern sterilization equipment) can enhance efficiency, improve patient outcomes, and signal a practice that is forward-thinking, potentially increasing its appeal and value.
  7. Staff Quality and Stability: An experienced, loyal, and well-trained team can significantly contribute to a practice's smooth operation and reputation. High staff turnover can be a red flag for potential buyers, suggesting underlying issues.
  8. Lease Terms or Real Estate Ownership: Favorable lease terms (long duration, reasonable rent increases) or outright ownership of the practice's real estate can add substantial value and security for a buyer. Unfavorable lease terms can be a significant detractor.

Frequently Asked Questions (FAQ)

Q1: Is my practice's real estate included in this valuation?

A: This calculator focuses on the value of the practice as a business entity (goodwill, patient base, revenue streams). If you own the real estate separately, its valuation is a distinct process. Sometimes, the real estate is included in the sale, which would be negotiated separately and could increase the overall transaction value.

Q2: How accurate is the valuation multiple provided?

A: The multiples in the dropdown are general industry guidelines. The actual multiple for your practice depends on many specific factors, including market conditions, buyer pool, and the thoroughness of due diligence. It's best to consult with a professional for a precise multiple.

Q3: What is "goodwill" in dental practice valuation?

A: Goodwill represents the intangible value of a practice beyond its tangible assets. It includes the reputation of the dentist, the established patient relationships, the brand recognition, and the ongoing business potential. It's a significant component of the practice's overall value.

Q4: Can I use this calculator if I own multiple practices?

A: This calculator is designed for single practice valuation. For multi-practice entities, a more complex valuation methodology considering economies of scale, management structure, and portfolio synergies would be required.

Q5: How often should I update my practice valuation?

A: It's wise to conduct a valuation or at least review your practice's financial performance for valuation purposes annually, especially if you are considering a transition within the next 3-5 years. Market conditions and your practice's performance can change.

Q6: What if my practice has significant debt? Does that affect its value?

A: The valuation calculated here represents the enterprise value of the practice. When a practice is sold, the buyer typically assumes or pays off existing business debts. The net proceeds to the seller would be the sale price minus any liabilities paid off at closing. So, while debt doesn't reduce the *enterprise* value, it affects the *seller's net proceeds*.

Q7: My practice age is low (e.g., 2 years). How does that impact value?

A: Younger practices often have lower valuations because they haven't yet established a large, loyal patient base or a long track record of consistent profitability. Buyers may perceive higher risk. Focus on demonstrating growth, patient acquisition, and strong operational efficiency to build value.

Q8: What's the difference between selling the practice and selling the building?

A: Selling the practice refers to the business operations, patient list, goodwill, equipment, etc. Selling the building refers to the real estate itself. These can be separate transactions, or sometimes combined if the dentist owns both. A buyer might lease the space from the seller or purchase it as part of the deal.

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estimatedValue / numberOfChairs : 0; // Display results document.getElementById('displayEbitda').textContent = formatCurrency(ebitda); document.getElementById('displayAdjustedEbitda').textContent = formatCurrency(adjustedEbitda); document.getElementById('displayChairValue').textContent = formatCurrency(valuePerChair); document.getElementById('primaryResult').textContent = formatCurrency(estimatedValue); document.getElementById('no-results-message').style.display = 'none'; document.getElementById('results').style.display = 'block'; updateChart(estimatedValue, ebitda, adjustedEbitda, valuePerChair, numberOfChairs); } function resetCalculator() { document.getElementById('annualRevenue').value = '500000'; document.getElementById('ebitdaMargin').value = '25'; document.getElementById('numberOfChairs').value = '4'; document.getElementById('practiceAge').value = '10'; document.getElementById('doctorSalary').value = '180000'; document.getElementById('valuationMultiple').value = '0.9'; // Default to a middle value // Clear error messages document.getElementById('annualRevenueError').textContent = "; document.getElementById('ebitdaMarginError').textContent = "; document.getElementById('numberOfChairsError').textContent = "; document.getElementById('practiceAgeError').textContent = "; document.getElementById('doctorSalaryError').textContent = "; // Hide results and show initial message document.getElementById('results').style.display = 'none'; document.getElementById('no-results-message').style.display = 'block'; document.getElementById('valuationChart').getContext('2d').clearRect(0, 0, 400, 300); // Clear chart } function copyResults() { var mainResultElement = document.getElementById('primaryResult'); var mainResult = mainResultElement.textContent; var intermediateElements = document.querySelectorAll('.intermediate-result-item strong'); var intermediateValues = []; intermediateElements.forEach(function(el) { intermediateValues.push(el.textContent + ' (' + el.nextElementSibling.textContent + ')'); }); var valuationMultipleSelected = document.getElementById('valuationMultiple'); var selectedMultipleText = valuationMultipleSelected.options[valuationMultipleSelected.selectedIndex].text; var assumptions = [ "Annual Gross Revenue: " + document.getElementById('annualRevenue').value, "EBITDA Margin: " + document.getElementById('ebitdaMargin').value + "%", "Number of Operatory Chairs: " + document.getElementById('numberOfChairs').value, "Practice Age: " + document.getElementById('practiceAge').value + " years", "Owner Dentist Salary: " + formatCurrency(getInputValue('doctorSalary')), "Selected Valuation Multiple: " + selectedMultipleText ]; var textToCopy = "— Dental Practice Valuation Results —\n\n"; textToCopy += "Estimated Practice Value: " + mainResult + "\n\n"; textToCopy += "— Key Intermediate Values —\n"; intermediateValues.forEach(function(val) { textToCopy += "- " + val + "\n"; }); textToCopy += "\n— Key Assumptions —\n"; assumptions.forEach(function(assump) { textToCopy += "- " + assump + "\n"; }); navigator.clipboard.writeText(textToCopy).then(function() { alert('Results copied to clipboard!'); }, function(err) { console.error('Failed to copy: ', err); // Fallback for older browsers or insecure contexts var textArea = document.createElement("textarea"); textArea.value = textToCopy; textArea.style.position = "fixed"; textArea.style.left = "-9999px"; textArea.style.top = "-9999px"; document.body.appendChild(textArea); textArea.focus(); textArea.select(); try { var successful = document.execCommand('copy'); var msg = successful ? 'successful' : 'unsuccessful'; console.log('Fallback: Copying text command was ' + msg); } catch (err) { console.error('Fallback: Oops, unable to copy', err); } document.body.removeChild(textArea); alert('Results copied to clipboard (fallback method)!'); }); } function updateChart(estimatedValue, ebitda, adjustedEbitda, valuePerChair, numberOfChairs) { var ctx = document.getElementById('valuationChart').getContext('2d'); // Clear previous chart if (window.valuationChartInstance) { window.valuationChartInstance.destroy(); } // Define data points var labels = ['Estimated Total Value', 'Annual EBITDA', 'Adjusted EBITDA', 'Value per Chair']; var data = [estimatedValue, ebitda, adjustedEbitda, valuePerChair]; // Scale data for better visualization if necessary, especially value per chair can be much smaller // Let's create a normalized scale for display if needed, or keep raw for comparison // For now, keep raw to show magnitude differences window.valuationChartInstance = new Chart(ctx, { type: 'bar', data: { labels: labels, datasets: [{ label: 'Dollar Value', data: data, backgroundColor: [ 'rgba(0, 74, 153, 0.6)', // Total Value 'rgba(40, 167, 69, 0.6)', // EBITDA 'rgba(255, 193, 7, 0.6)', // Adjusted EBITDA 'rgba(108, 117, 125, 0.6)' // Value per Chair ], borderColor: [ 'rgba(0, 74, 153, 1)', 'rgba(40, 167, 69, 1)', 'rgba(255, 193, 7, 1)', 'rgba(108, 117, 125, 1)' ], borderWidth: 1 }] }, options: { responsive: true, maintainAspectRatio: false, scales: { y: { beginAtZero: true, ticks: { // Format Y-axis labels as currency callback: function(value, index, values) { var formatter = new Intl.NumberFormat('en-US', { style: 'currency', currency: 'USD', minimumFractionDigits: 0, maximumFractionDigits: 0, }); return formatter.format(value); } } } }, plugins: { legend: { display: false // Hide legend as labels are on X-axis }, title: { display: true, text: 'Valuation Components Comparison', font: { size: 16 } } } } }); } // Initial calculation on load if inputs have default values document.addEventListener('DOMContentLoaded', function() { // Set default values if they are empty if (document.getElementById('annualRevenue').value === ") document.getElementById('annualRevenue').value = '500000'; if (document.getElementById('ebitdaMargin').value === ") document.getElementById('ebitdaMargin').value = '25'; if (document.getElementById('numberOfChairs').value === ") document.getElementById('numberOfChairs').value = '4'; if (document.getElementById('practiceAge').value === ") document.getElementById('practiceAge').value = '10'; if (document.getElementById('doctorSalary').value === ") document.getElementById('doctorSalary').value = '180000'; // Ensure chart canvas is present before trying to update var chartCanvas = document.getElementById('valuationChart'); if (chartCanvas) { // Initialize chart with placeholder or first calculation calculateValue(); // Perform calculation with default values on load } }); // Simple Chart.js v3+ integration (assuming Chart.js is available globally) // If Chart.js is not globally available, this part needs to be adjusted or Chart.js loaded. // For a self-contained HTML, you'd typically include Chart.js via CDN in the . // Example: // For this problem, we assume Chart.js is available or will be included by the user. // As per instructions, no external libraries. So we use pure canvas API for basic drawing. // Re-implementing chart with pure canvas API: function drawBasicChart(canvasId, data, labels) { var canvas = document.getElementById(canvasId); if (!canvas) return; var ctx = canvas.getContext('2d'); ctx.clearRect(0, 0, canvas.width, canvas.height); // Clear canvas var chartWidth = canvas.width; var chartHeight = canvas.height; var barPadding = 5; var labelHeight = 20; // Space for labels // Find max value for scaling var maxValue = 0; for (var i = 0; i maxValue) { maxValue = data[i]; } } if (maxValue === 0) maxValue = 1; // Avoid division by zero var barWidth = (chartWidth – (data.length + 1) * barPadding) / data.length; var chartAreaHeight = chartHeight – labelHeight * 3; // Reserve space for axis and labels ctx.fillStyle = '#004a99′; ctx.font = '12px Arial'; ctx.textAlign = 'center'; // Draw Bars and Labels for (var i = 0; i < data.length; i++) { var barHeight = (data[i] / maxValue) * chartAreaHeight; var x = barPadding * (i + 1) + i * barWidth; var y = chartAreaHeight – barHeight + labelHeight * 2; // Position bars from bottom // Draw bar ctx.fillStyle = ['rgba(0, 74, 153, 0.6)', 'rgba(40, 167, 69, 0.6)', 'rgba(255, 193, 7, 0.6)', 'rgba(108, 117, 125, 0.6)'][i]; ctx.fillRect(x, y, barWidth, barHeight); // Draw label ctx.fillStyle = '#333'; ctx.fillText(labels[i], x + barWidth / 2, chartHeight – labelHeight); // Draw value above bar ctx.fillStyle = '#000'; ctx.fillText(formatCurrency(data[i]), x + barWidth / 2, y – 5); } // Draw Y-axis ctx.beginPath(); ctx.moveTo(barPadding, chartHeight – labelHeight * 2); ctx.lineTo(barPadding, labelHeight); ctx.strokeStyle = '#ccc'; ctx.stroke(); // Draw Y-axis labels (simplified) ctx.fillStyle = '#666'; ctx.textAlign = 'right'; var numTicks = 5; for (var i = 0; i < numTicks; i++) { var tickValue = maxValue * (i / (numTicks – 1)); var tickY = chartAreaHeight – (tickValue / maxValue) * chartAreaHeight + labelHeight * 2; if (tickY < labelHeight) tickY = labelHeight; // Cap at top ctx.fillText(formatCurrency(tickValue), barPadding – 10, tickY); } ctx.fillText(formatCurrency(maxValue), barPadding – 10, labelHeight); } // Override the updateChart function to use pure canvas API function updateChart(estimatedValue, ebitda, adjustedEbitda, valuePerChair, numberOfChairs) { var labels = ['Total Value', 'EBITDA', 'Adj. EBITDA', 'Value/Chair']; var data = [estimatedValue, ebitda, adjustedEbitda, valuePerChair]; drawBasicChart('valuationChart', data, labels); } // Initial calculation on load with updated chart function document.addEventListener('DOMContentLoaded', function() { if (document.getElementById('annualRevenue').value === '') document.getElementById('annualRevenue').value = '500000'; if (document.getElementById('ebitdaMargin').value === '') document.getElementById('ebitdaMargin').value = '25'; if (document.getElementById('numberOfChairs').value === '') document.getElementById('numberOfChairs').value = '4'; if (document.getElementById('practiceAge').value === '') document.getElementById('practiceAge').value = '10'; if (document.getElementById('doctorSalary').value === '') document.getElementById('doctorSalary').value = '180000'; calculateValue(); // Perform calculation with default values on load });

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