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<link rel="stylesheet" href="/_astro/index.JDpdqNfI.css"></head> <body> <header> <nav> <a href="/" class="logo"> <svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg"> <rect width="32" height="32" rx="8" fill="#059669"></rect> <path d="M8 10h16M8 16h12M8 22h16" stroke="white" stroke-width="2" stroke-linecap="round"></path> <circle cx="22" cy="16" r="3" fill="white"></circle> </svg> <span>Payroll Cost Simulator</span> </a> <div class="nav-links"> <a href="/">Calculator</a> <a href="/blog/">Guides</a> </div> </nav> </header> <main>  <div class="container" data-astro-cid-j7pv25f6> <div class="hero" data-astro-cid-j7pv25f6> <h1 data-astro-cid-j7pv25f6>Payroll Software Cost & Outsourcing Break-Even Simulator</h1> <p data-astro-cid-j7pv25f6>Compare the true cost of payroll software vs in-house processing vs PEO outsourcing. Calculate per-employee costs, find your break-even point, and get personalized recommendations.</p> </div> <div class="ad-slot-container" data-astro-cid-fgwukgf6> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-3834557109045287" data-ad-slot="9120148407" data-ad-format="auto" data-full-width-responsive="true" data-astro-cid-fgwukgf6></ins> <script>
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  </script> </div>  <div class="calculator-grid" data-astro-cid-j7pv25f6> <div class="input-section" data-astro-cid-j7pv25f6> <h2 data-astro-cid-j7pv25f6>Company Profile</h2> <div class="input-group" data-astro-cid-j7pv25f6> <label for="employeeCount" data-astro-cid-j7pv25f6>Number of W-2 Employees</label> <input type="number" id="employeeCount" value="15" min="1" max="1000" data-astro-cid-j7pv25f6> <small data-astro-cid-j7pv25f6>Full-time and part-time employees on payroll</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="contractorRatio" data-astro-cid-j7pv25f6>Contractor Percentage (%)</label> <input type="number" id="contractorRatio" value="20" min="0" max="100" step="5" data-astro-cid-j7pv25f6> <small data-astro-cid-j7pv25f6>1099 contractors as % of workforce</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="payFrequency" data-astro-cid-j7pv25f6>Payroll Frequency</label> <select id="payFrequency" data-astro-cid-j7pv25f6> <option value="biweekly" data-astro-cid-j7pv25f6>Bi-Weekly (Every 2 Weeks)</option> <option value="weekly" data-astro-cid-j7pv25f6>Weekly</option> <option value="semimonthly" data-astro-cid-j7pv25f6>Semi-Monthly (Twice a Month)</option> <option value="monthly" data-astro-cid-j7pv25f6>Monthly</option> </select> </div> <h2 data-astro-cid-j7pv25f6>Payroll Software Costs</h2> <div class="input-group" data-astro-cid-j7pv25f6> <label for="softwareBaseFee" data-astro-cid-j7pv25f6>Monthly Base Platform Fee</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="softwareBaseFee" class="currency-input" value="45" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Fixed monthly subscription cost</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="perEmployeeFee" data-astro-cid-j7pv25f6>Per-Employee Monthly Fee</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="perEmployeeFee" class="currency-input" value="6" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Cost per employee per month</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="perPayRunFee" data-astro-cid-j7pv25f6>Per Pay-Run Fee</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="perPayRunFee" class="currency-input" value="0" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Additional fee each time you run payroll</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="taxFilingFee" data-astro-cid-j7pv25f6>Tax Filing Add-On (Monthly)</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="taxFilingFee" class="currency-input" value="25" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Automated tax filing and compliance</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="setupFee" data-astro-cid-j7pv25f6>Annualized Setup/Implementation</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="setupFee" class="currency-input" value="0" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>One-time setup divided by 12 months</small> </div> <h2 data-astro-cid-j7pv25f6>In-House Processing Costs</h2> <div class="input-group" data-astro-cid-j7pv25f6> <label for="hoursPerMonth" data-astro-cid-j7pv25f6>Hours Spent on Payroll/Month</label> <input type="number" id="hoursPerMonth" value="8" min="0" max="100" step="1" data-astro-cid-j7pv25f6> <small data-astro-cid-j7pv25f6>Owner or HR time processing payroll</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="hourlyRate" data-astro-cid-j7pv25f6>Hourly Rate (Opportunity Cost)</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="hourlyRate" class="currency-input" value="50" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Value of time spent on payroll</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="errorCost" data-astro-cid-j7pv25f6>Monthly Error/Amendment Cost</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="errorCost" class="currency-input" value="50" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Estimated cost of mistakes, corrections</small> </div> <h2 data-astro-cid-j7pv25f6>PEO Outsourcing Costs</h2> <div class="input-group" data-astro-cid-j7pv25f6> <label for="peoPerEmployee" data-astro-cid-j7pv25f6>PEO Per-Employee Fee (Monthly)</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="peoPerEmployee" class="currency-input" value="150" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Full-service PEO fee per employee</small> </div> <div class="input-group" data-astro-cid-j7pv25f6> <label for="peoBaseFee" data-astro-cid-j7pv25f6>PEO Base Monthly Fee</label> <div class="input-with-prefix" data-astro-cid-j7pv25f6> <span class="prefix" data-astro-cid-j7pv25f6>$</span> <input type="text" id="peoBaseFee" class="currency-input" value="0" inputmode="numeric" data-astro-cid-j7pv25f6> </div> <small data-astro-cid-j7pv25f6>Fixed monthly PEO administration fee</small> </div> <button id="calculateBtn" class="calculate-btn" data-astro-cid-j7pv25f6>Calculate & Compare Options</button> </div> <div class="results-section" data-astro-cid-j7pv25f6> <h2 data-astro-cid-j7pv25f6>Cost Comparison Analysis</h2> <div id="summaryCards" class="summary-cards" data-astro-cid-j7pv25f6> <div class="summary-card best" data-astro-cid-j7pv25f6> <span class="card-label" data-astro-cid-j7pv25f6>Recommended Option</span> <span id="recommendedOption" class="card-value" data-astro-cid-j7pv25f6>-</span> <span class="card-note" data-astro-cid-j7pv25f6>Based on your inputs</span> </div> <div class="summary-card primary" data-astro-cid-j7pv25f6> <span class="card-label" data-astro-cid-j7pv25f6>Software Monthly Cost</span> <span id="softwareMonthly" class="card-value" data-astro-cid-j7pv25f6>-</span> <span class="card-note" data-astro-cid-j7pv25f6>Total monthly expense</span> </div> <div class="summary-card" data-astro-cid-j7pv25f6> <span class="card-label" data-astro-cid-j7pv25f6>In-House Monthly Cost</span> <span id="inHouseMonthly" class="card-value" data-astro-cid-j7pv25f6>-</span> <span class="card-note" data-astro-cid-j7pv25f6>Time + error costs</span> </div> <div class="summary-card" data-astro-cid-j7pv25f6> <span class="card-label" data-astro-cid-j7pv25f6>PEO Monthly Cost</span> <span id="peoMonthly" class="card-value" data-astro-cid-j7pv25f6>-</span> <span class="card-note" data-astro-cid-j7pv25f6>Full outsourcing</span> </div> </div> <div class="detail-section" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Per-Employee Cost Breakdown</h3> <table class="breakdown-table" data-astro-cid-j7pv25f6> <thead data-astro-cid-j7pv25f6> <tr data-astro-cid-j7pv25f6> <th data-astro-cid-j7pv25f6>Option</th> <th data-astro-cid-j7pv25f6>Monthly</th> <th data-astro-cid-j7pv25f6>Per Employee</th> <th data-astro-cid-j7pv25f6>Annual</th> </tr> </thead> <tbody id="costBreakdown" data-astro-cid-j7pv25f6></tbody> </table> </div> <div class="detail-section" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Break-Even Analysis</h3> <div id="breakevenAnalysis" class="breakeven-grid" data-astro-cid-j7pv25f6></div> </div> <div class="detail-section" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Scaling Projection</h3> <p class="section-desc" data-astro-cid-j7pv25f6>How costs change as you hire more employees</p> <div id="scalingChart" class="scaling-chart" data-astro-cid-j7pv25f6></div> </div> <div class="recommendation-box" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Personalized Recommendation</h3> <div id="recommendation" class="recommendation-text" data-astro-cid-j7pv25f6></div> </div> <div class="vendor-comparison-section" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Compare Real Vendor Pricing Next</h3> <p class="section-intro" data-astro-cid-j7pv25f6>Ready to choose? See actual pricing data and avoid surprises.</p> <div class="comparison-cards" data-astro-cid-j7pv25f6> <a href="/blog/adp-vs-gusto-vs-quickbooks-payroll-cost-comparison/" class="comparison-card" data-astro-cid-j7pv25f6> <span class="card-icon" data-astro-cid-j7pv25f6>📊</span> <span class="card-title" data-astro-cid-j7pv25f6>ADP vs Gusto vs QuickBooks</span> <span class="card-benefit" data-astro-cid-j7pv25f6>Side-by-side pricing for the top 3 payroll providers</span> <span class="card-cta" data-astro-cid-j7pv25f6>Compare Now →</span> </a> <a href="/blog/payroll-vendor-switching-cost-calculator-2026/" class="comparison-card" data-astro-cid-j7pv25f6> <span class="card-icon" data-astro-cid-j7pv25f6>🔄</span> <span class="card-title" data-astro-cid-j7pv25f6>Switching Cost Calculator</span> <span class="card-benefit" data-astro-cid-j7pv25f6>Know the true cost of changing payroll providers</span> <span class="card-cta" data-astro-cid-j7pv25f6>Calculate Switch Costs →</span> </a> <a href="/blog/payroll-software-hidden-fee-checklist/" class="comparison-card" data-astro-cid-j7pv25f6> <span class="card-icon" data-astro-cid-j7pv25f6>⚠️</span> <span class="card-title" data-astro-cid-j7pv25f6>Hidden Fee Checklist</span> <span class="card-benefit" data-astro-cid-j7pv25f6>15+ fees vendors don't advertise upfront</span> <span class="card-cta" data-astro-cid-j7pv25f6>See Hidden Fees →</span> </a> </div> </div> <section class="ad-slot" aria-label="Advertisement" data-astro-cid-j7pv25f6> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-3834557109045287" data-ad-slot="9120148407" data-ad-format="auto" data-full-width-responsive="true" data-astro-cid-j7pv25f6></ins> </section> <div class="detail-section" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Hidden Costs to Consider</h3> <div class="hidden-costs-grid" data-astro-cid-j7pv25f6> <div class="hidden-cost-item" data-astro-cid-j7pv25f6> <strong data-astro-cid-j7pv25f6>Software:</strong> <span id="softwareHidden" data-astro-cid-j7pv25f6>Integrations, training time, limited support tiers</span> </div> <div class="hidden-cost-item" data-astro-cid-j7pv25f6> <strong data-astro-cid-j7pv25f6>In-House:</strong> <span id="inhouseHidden" data-astro-cid-j7pv25f6>Compliance risk, penalty exposure, lost productivity</span> </div> <div class="hidden-cost-item" data-astro-cid-j7pv25f6> <strong data-astro-cid-j7pv25f6>PEO:</strong> <span id="peoHidden" data-astro-cid-j7pv25f6>Less control, bundled services you may not need</span> </div> </div> </div> </div> </div> <section class="ad-slot" aria-label="Advertisement" data-astro-cid-j7pv25f6> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-3834557109045287" data-ad-slot="9120148407" data-ad-format="auto" data-full-width-responsive="true" data-astro-cid-j7pv25f6></ins> </section> <div class="info-section" data-astro-cid-j7pv25f6> <h2 data-astro-cid-j7pv25f6>Understanding Payroll Costs: Software vs In-House vs PEO</h2> <div class="info-cards" data-astro-cid-j7pv25f6> <div class="info-card" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>Payroll Software</h3> <ul data-astro-cid-j7pv25f6> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Best for:</strong> Businesses with 1-100 employees who want control</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Typical cost:</strong> $40-150/month base + $4-12/employee</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Pros:</strong> Control, flexibility, lower cost at scale</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Cons:</strong> Requires some HR knowledge, manual oversight</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Examples:</strong> Gusto, QuickBooks Payroll, ADP Run, Paychex Flex</li> </ul> </div> <div class="info-card" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>In-House Processing</h3> <ul data-astro-cid-j7pv25f6> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Best for:</strong> Very small businesses with simple payroll</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Typical cost:</strong> Your time + spreadsheet tools</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Pros:</strong> No monthly fees, complete control</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Cons:</strong> High error risk, compliance burden, time-consuming</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Warning:</strong> Tax penalties can exceed software costs</li> </ul> </div> <div class="info-card" data-astro-cid-j7pv25f6> <h3 data-astro-cid-j7pv25f6>PEO Outsourcing</h3> <ul data-astro-cid-j7pv25f6> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Best for:</strong> Growing companies wanting HR support</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Typical cost:</strong> $100-200/employee/month (bundled)</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Pros:</strong> Full HR support, benefits access, compliance handled</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Cons:</strong> Higher per-employee cost, less flexibility</li> <li data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Examples:</strong> ADP TotalSource, Insperity, TriNet, Justworks</li> </ul> </div> </div> </div> <div class="faq-section" data-astro-cid-j7pv25f6> <h2 data-astro-cid-j7pv25f6>Frequently Asked Questions</h2> <div class="faq-grid" data-astro-cid-j7pv25f6> <div class="faq-item" data-astro-cid-j7pv25f6> <h4 data-astro-cid-j7pv25f6>When should a small business outsource payroll?</h4> <p data-astro-cid-j7pv25f6>Consider outsourcing when you have 10+ employees, spend more than 5 hours/month on payroll, or face compliance complexity. The break-even point typically falls between 15-25 employees depending on your hourly value and error costs.</p> </div> <div class="faq-item" data-astro-cid-j7pv25f6> <h4 data-astro-cid-j7pv25f6>What's the true cost of payroll software?</h4> <p data-astro-cid-j7pv25f6>Beyond the advertised base price, factor in per-employee fees, pay-run fees, tax filing add-ons, setup costs, integration fees, and time spent learning the system. A $45/month plan can easily become $150+/month for 20 employees.</p> </div> <div class="faq-item" data-astro-cid-j7pv25f6> <h4 data-astro-cid-j7pv25f6>Is PEO worth it for small businesses?</h4> <p data-astro-cid-j7pv25f6>PEO makes sense when you want comprehensive HR support, access to enterprise-level benefits, and risk transfer. The break-even analysis shows PEO becomes cost-competitive at 20-50 employees when you factor in HR time savings and benefits costs.</p> </div> <div class="faq-item" data-astro-cid-j7pv25f6> <h4 data-astro-cid-j7pv25f6>How do I calculate per-employee payroll cost?</h4> <p data-astro-cid-j7pv25f6>Divide your total monthly payroll expense by employee count: (Base Fee + Per-Employee Fees + Tax Filing + Time Cost) / Employees. This helps compare options and project scaling costs accurately.</p> </div> <div class="faq-item" data-astro-cid-j7pv25f6> <h4 data-astro-cid-j7pv25f6>What hidden fees should I watch for?</h4> <p data-astro-cid-j7pv25f6>Watch for: year-end W-2 processing fees, state filing add-ons, direct deposit fees, contractor payment surcharges, implementation costs, training time, and premium support tiers. Always get a full pricing breakdown before committing.</p> </div> <div class="faq-item" data-astro-cid-j7pv25f6> <h4 data-astro-cid-j7pv25f6>Can I switch payroll providers mid-year?</h4> <p data-astro-cid-j7pv25f6>Yes, but timing matters. Switching at year-end simplifies W-2 reporting. Mid-year switches require historical data transfer and coordination between providers. Budget 2-4 weeks for transition and expect some overlap costs.</p> </div> </div> </div> <div class="disclaimer" data-astro-cid-j7pv25f6> <p data-astro-cid-j7pv25f6><strong data-astro-cid-j7pv25f6>Disclaimer:</strong> This calculator provides estimates for informational purposes only. Actual payroll costs vary by provider, location, and business needs. This is not financial or business advice. Consult with a CPA or HR professional for guidance specific to your situation.</p> </div> </div>  </main> <section class="global-ad-wrap"> <div class="ad-slot-container" data-astro-cid-fgwukgf6> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-3834557109045287" data-ad-slot="9120148407" data-ad-format="auto" data-full-width-responsive="true" data-astro-cid-fgwukgf6></ins> <script>
    (window['adsbygoogle'] = window['adsbygoogle'] || []).push({});
  </script> </div>  </section> <footer> <div class="footer-content"> <div class="footer-section"> <h3>Payroll Software Cost Simulator</h3> <p>Free calculator to compare payroll software costs, in-house processing, and PEO outsourcing options for your business.</p> </div> <div class="footer-section"> <h4>Resources</h4> <a href="/">Calculator</a> <a href="/blog/">Guides & Articles</a> </div> <div class="footer-section"> <h4>Legal</h4> <a href="/disclaimer/">Disclaimer</a> <a href="/privacy/">Privacy Policy</a> <a href="/terms/">Terms of Use</a> </div> </div> <div class="footer-bottom"> <p>&copy; 2026 Sundry-Know. For informational purposes only. Not financial or business advice.</p> </div> </footer>  </body> </html>  <div class="ad-slot-container" data-astro-cid-fgwukgf6> <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-3834557109045287" data-ad-slot="9120148407" data-ad-format="auto" data-full-width-responsive="true" data-astro-cid-fgwukgf6></ins> <script>
    (window['adsbygoogle'] = window['adsbygoogle'] || []).push({});
  </script> </div>  <script>
  (window.adsbygoogle = window.adsbygoogle || []).push({});

  // Format currency
  const formatCurrency = (num) => {
    return new Intl.NumberFormat('en-US', {
      style: 'currency',
      currency: 'USD',
      minimumFractionDigits: 0,
      maximumFractionDigits: 0
    }).format(num);
  };

  // Parse currency input
  const parseCurrency = (str) => {
    return parseFloat(str.replace(/[^0-9.-]+/g, '')) || 0;
  };

  // Format currency input as user types
  document.querySelectorAll('.currency-input').forEach(input => {
    input.addEventListener('input', function(e) {
      let value = this.value.replace(/[^0-9]/g, '');
      if (value) {
        this.value = parseInt(value).toLocaleString('en-US');
      } else {
        this.value = '';
      }
    });
  });

  // Get pay periods per year
  const getPayPeriods = (frequency) => {
    switch(frequency) {
      case 'weekly': return 52;
      case 'biweekly': return 26;
      case 'semimonthly': return 24;
      case 'monthly': return 12;
      default: return 26;
    }
  };

  // Main calculation function
  const calculate = () => {
    // Get company inputs
    const employeeCount = parseInt(document.getElementById('employeeCount').value) || 1;
    const contractorRatio = parseFloat(document.getElementById('contractorRatio').value) || 0;
    const payFrequency = document.getElementById('payFrequency').value;
    const payPeriodsPerYear = getPayPeriods(payFrequency);
    const payPeriodsPerMonth = payPeriodsPerYear / 12;

    // Get software costs
    const softwareBaseFee = parseCurrency(document.getElementById('softwareBaseFee').value);
    const perEmployeeFee = parseCurrency(document.getElementById('perEmployeeFee').value);
    const perPayRunFee = parseCurrency(document.getElementById('perPayRunFee').value);
    const taxFilingFee = parseCurrency(document.getElementById('taxFilingFee').value);
    const setupFee = parseCurrency(document.getElementById('setupFee').value);

    // Get in-house costs
    const hoursPerMonth = parseFloat(document.getElementById('hoursPerMonth').value) || 0;
    const hourlyRate = parseCurrency(document.getElementById('hourlyRate').value);
    const errorCost = parseCurrency(document.getElementById('errorCost').value);

    // Get PEO costs
    const peoPerEmployee = parseCurrency(document.getElementById('peoPerEmployee').value);
    const peoBaseFee = parseCurrency(document.getElementById('peoBaseFee').value);

    // Calculate software monthly cost
    const softwareMonthly = softwareBaseFee +
                           (perEmployeeFee * employeeCount) +
                           (perPayRunFee * payPeriodsPerMonth) +
                           taxFilingFee +
                           setupFee;

    // Calculate in-house monthly cost
    const inHouseMonthly = (hoursPerMonth * hourlyRate) + errorCost;

    // Calculate PEO monthly cost
    const peoMonthly = peoBaseFee + (peoPerEmployee * employeeCount);

    // Calculate per-employee costs
    const softwarePerEmployee = employeeCount > 0 ? softwareMonthly / employeeCount : softwareMonthly;
    const inHousePerEmployee = employeeCount > 0 ? inHouseMonthly / employeeCount : inHouseMonthly;
    const peoPerEmployeeCost = employeeCount > 0 ? peoMonthly / employeeCount : peoMonthly;

    // Calculate annual costs
    const softwareAnnual = softwareMonthly * 12;
    const inHouseAnnual = inHouseMonthly * 12;
    const peoAnnual = peoMonthly * 12;

    // Determine best option
    const costs = [
      { name: 'Software', monthly: softwareMonthly },
      { name: 'In-House', monthly: inHouseMonthly },
      { name: 'PEO', monthly: peoMonthly }
    ];
    costs.sort((a, b) => a.monthly - b.monthly);
    const bestOption = costs[0].name;

    // Update summary cards
    document.getElementById('recommendedOption').textContent = bestOption;
    document.getElementById('softwareMonthly').textContent = formatCurrency(softwareMonthly);
    document.getElementById('inHouseMonthly').textContent = formatCurrency(inHouseMonthly);
    document.getElementById('peoMonthly').textContent = formatCurrency(peoMonthly);

    // Update cost breakdown table
    const breakdownTable = document.getElementById('costBreakdown');
    breakdownTable.innerHTML = `
      <tr class="${bestOption === 'Software' ? 'best-option' : ''}">
        <td>Payroll Software</td>
        <td>${formatCurrency(softwareMonthly)}</td>
        <td>${formatCurrency(softwarePerEmployee)}</td>
        <td>${formatCurrency(softwareAnnual)}</td>
      </tr>
      <tr class="${bestOption === 'In-House' ? 'best-option' : ''}">
        <td>In-House Processing</td>
        <td>${formatCurrency(inHouseMonthly)}</td>
        <td>${formatCurrency(inHousePerEmployee)}</td>
        <td>${formatCurrency(inHouseAnnual)}</td>
      </tr>
      <tr class="${bestOption === 'PEO' ? 'best-option' : ''}">
        <td>PEO Outsourcing</td>
        <td>${formatCurrency(peoMonthly)}</td>
        <td>${formatCurrency(peoPerEmployeeCost)}</td>
        <td>${formatCurrency(peoAnnual)}</td>
      </tr>
    `;

    // Calculate break-even points
    const softwareVsInHouse = softwareMonthly - inHouseMonthly;
    const peoVsSoftware = peoMonthly - softwareMonthly;

    let breakevenHTML = '';

    // Software vs In-House break-even
    if (perEmployeeFee > 0) {
      const breakevenEmployees = Math.ceil((inHouseMonthly - softwareBaseFee - taxFilingFee - setupFee) / perEmployeeFee);
      if (breakevenEmployees > 0 && breakevenEmployees < 1000) {
        breakevenHTML += `
          <div class="breakeven-item">
            <span class="breakeven-label">Software vs In-House</span>
            <span class="breakeven-value">${breakevenEmployees} employees</span>
            <span class="breakeven-note">In-house cheaper below this point</span>
          </div>
        `;
      }
    }

    // PEO vs Software break-even
    if (peoPerEmployee - perEmployeeFee > 0) {
      const peoBreakeven = Math.ceil((softwareBaseFee + taxFilingFee - peoBaseFee) / (peoPerEmployee - perEmployeeFee));
      if (peoBreakeven > 0 && peoBreakeven < 1000) {
        breakevenHTML += `
          <div class="breakeven-item">
            <span class="breakeven-label">PEO vs Software</span>
            <span class="breakeven-value">${peoBreakeven} employees</span>
            <span class="breakeven-note">PEO cost-competitive above this</span>
          </div>
        `;
      }
    }

    // Monthly savings
    const savings = costs[2].monthly - costs[0].monthly;
    breakevenHTML += `
      <div class="breakeven-item">
        <span class="breakeven-label">Monthly Savings</span>
        <span class="breakeven-value">${formatCurrency(savings)}</span>
        <span class="breakeven-note">By choosing ${bestOption}</span>
      </div>
    `;

    // Annual savings
    breakevenHTML += `
      <div class="breakeven-item">
        <span class="breakeven-label">Annual Savings</span>
        <span class="breakeven-value">${formatCurrency(savings * 12)}</span>
        <span class="breakeven-note">Year-over-year</span>
      </div>
    `;

    document.getElementById('breakevenAnalysis').innerHTML = breakevenHTML;

    // Scaling projection
    const scales = [5, 10, 20, 50, 100];
    let scalingHTML = `
      <div class="scaling-row">
        <div class="scaling-header">Employees</div>
        ${scales.map(s => `<div class="scaling-header">${s}</div>`).join('')}
      </div>
    `;

    // Software scaling
    scalingHTML += `<div class="scaling-row">
      <div class="scaling-cell">Software</div>
      ${scales.map(s => {
        const cost = softwareBaseFee + (perEmployeeFee * s) + (perPayRunFee * payPeriodsPerMonth) + taxFilingFee + setupFee;
        const isBest = cost === Math.min(
          cost,
          inHouseMonthly,
          peoBaseFee + (peoPerEmployee * s)
        );
        return `<div class="scaling-cell ${isBest ? 'highlight' : ''}">${formatCurrency(cost)}</div>`;
      }).join('')}
    </div>`;

    // In-House stays constant
    scalingHTML += `<div class="scaling-row">
      <div class="scaling-cell">In-House</div>
      ${scales.map(s => {
        const isBest = inHouseMonthly === Math.min(
          softwareBaseFee + (perEmployeeFee * s) + (perPayRunFee * payPeriodsPerMonth) + taxFilingFee + setupFee,
          inHouseMonthly,
          peoBaseFee + (peoPerEmployee * s)
        );
        return `<div class="scaling-cell ${isBest ? 'highlight' : ''}">${formatCurrency(inHouseMonthly)}</div>`;
      }).join('')}
    </div>`;

    // PEO scaling
    scalingHTML += `<div class="scaling-row">
      <div class="scaling-cell">PEO</div>
      ${scales.map(s => {
        const cost = peoBaseFee + (peoPerEmployee * s);
        const isBest = cost === Math.min(
          softwareBaseFee + (perEmployeeFee * s) + (perPayRunFee * payPeriodsPerMonth) + taxFilingFee + setupFee,
          inHouseMonthly,
          cost
        );
        return `<div class="scaling-cell ${isBest ? 'highlight' : ''}">${formatCurrency(cost)}</div>`;
      }).join('')}
    </div>`;

    document.getElementById('scalingChart').innerHTML = scalingHTML;

    // Generate recommendation
    let recommendation = '';

    if (employeeCount <= 5 && inHouseMonthly < softwareMonthly) {
      recommendation = `<strong>Recommendation: In-House Processing</strong><br><br>
      For very small businesses with ${employeeCount} employees, doing payroll manually or with basic spreadsheets may be cost-effective if your time cost (${formatCurrency(inHouseMonthly)}/month) is lower than software costs. However, be aware of compliance risks and tax filing requirements.<br><br>
      <strong>Consider software when:</strong> You hire employee #6-10, spend more than 5 hours/month on payroll, or face a tax penalty.`;
    } else if (employeeCount <= 50 && softwareMonthly <= inHouseMonthly && softwareMonthly < peoMonthly) {
      recommendation = `<strong>Recommendation: Payroll Software</strong><br><br>
      For ${employeeCount} employees, payroll software offers the best balance of cost and convenience at ${formatCurrency(softwareMonthly)}/month (${formatCurrency(softwarePerEmployee)}/employee). You'll save ${formatCurrency(inHouseMonthly - softwareMonthly)}/month compared to in-house processing.<br><br>
      <strong>Key benefits:</strong> Automated tax filing, direct deposit, compliance updates, and employee self-service. Look for Gusto, QuickBooks Payroll, or ADP Run for this size.`;
    } else if (employeeCount >= 50 || peoMonthly <= softwareMonthly) {
      recommendation = `<strong>Recommendation: PEO Outsourcing</strong><br><br>
      With ${employeeCount} employees, a PEO becomes cost-competitive at ${formatCurrency(peoMonthly)}/month and provides significant additional value: HR support, benefits administration, compliance management, and risk transfer.<br><br>
      <strong>Consider PEO if:</strong> You want enterprise-level benefits, need HR expertise, or want to offload compliance risk entirely. Popular PEOs include ADP TotalSource, TriNet, and Insperity.`;
    } else {
      recommendation = `<strong>Recommendation: Payroll Software</strong><br><br>
      Based on your inputs, payroll software at ${formatCurrency(softwareMonthly)}/month is your most cost-effective option. This includes automated tax filing, direct deposit, and basic compliance support.<br><br>
      <strong>Compare providers:</strong> Gusto (best UI), QuickBooks Payroll (best for QB users), ADP Run (enterprise features), Paychex Flex (personalized service).`;
    }

    document.getElementById('recommendation').innerHTML = recommendation;
  };

  // Event listeners
  document.getElementById('calculateBtn').addEventListener('click', calculate);

  // Auto-calculate on input change
  const inputs = document.querySelectorAll('input, select');
  inputs.forEach(input => {
    input.addEventListener('change', calculate);
  });

  // Initial calculation
  calculate();
</script>