A professional-grade commercial real estate calculator designed to determine the Net Effective Rent (NER) and Landlord Payback Period for office and industrial leases.

• Net Effective Rent (NER) Calculation: Uses a discounted cash flow (DCF) model with an annuity due formula (payments at start of period).
• Dynamic Rent Schedule: Supports lease terms up to 20 years with automatic column adjustment.
• Rent Escalations: Supports fixed % increase, fixed $ increase, or manual entry.
• Commission Models:
  • Office: $/SF/Year calculation.
  • Industrial: Split percentage (Year 1 vs Year 2+) calculation.
• Incentive Analysis:
  • Calculates Total Concessions (Free Rent + TI + Landlord Work).
  • Calculates Incentives as a % of Year 1 Gross Rent.
  • Calculates Landlord Payback Period (Breakeven).
• Free Rent Types: Supports both Net Free Rent (standard) and Gross Free Rent (landlord pays TMI).

1. Open the Calculator: Simply open index.html in any modern web browser.
2. Input Lease Parameters: Enter the lease term, square footage, and financial details.
3. View Results: The dashboard updates in real-time to show NER, NPV, and key metrics.

• HTML5
• CSS3 (Modern Grid/Flexbox, Glassmorphism UI)
• Vanilla JavaScript (No frameworks required)
• Chart.js (for cash flow visualization)

This is a static web project. You can host it for free on:

• Netlify: Drag and drop the project folder to Netlify Drop.
• GitHub Pages: Push this repository to GitHub and enable GitHub Pages.
• Vercel: Import the project from GitHub or use the Vercel CLI.