FIRE Calculator & Retirement Planner — Financial Independence Excel Workbook

🔥 FIRE Calculator & Retirement Planner — Financial Independence, Retire Early

A complete 12-sheet financial modeling workbook that maps your exact path to Financial Independence. Whether you're pursuing Lean FIRE, Coast FIRE, Barista FIRE, or Fat FIRE, this tool calculates your FIRE Number, projects your wealth trajectory, stress-tests your plan against market crashes, and identifies your weakest financial dimensions — all from a single set of inputs.

What Makes This Different

Most FIRE calculators give you a single number. This workbook gives you a complete financial independence analysis — Monte Carlo probability simulations, sequence-of-returns risk analysis, tax optimization across account types, and a 10-dimension readiness scorecard — all integrated so changing one number updates everything.

What's Inside — 12 Integrated Sheets:

• Dashboard — Central hub with KPIs at a glance, quick navigation to every sheet, and status indicators
• How to Use — Step-by-step walkthrough covering every sheet, FIRE terminology guide, and pro tips
• FIRE Dashboard — Enter your financial details once (highlighted gold cells). Calculates FIRE Number, savings rate, projected FIRE age, and years to independence with dynamic formulas
• Year-by-Year Projection — 40-year wealth forecast with portfolio growth, cumulative contributions, investment growth breakdown, FIRE status tracking per year, and embedded line chart
• FIRE Scenarios — Compare Conservative (5% return), Base (7%), and Aggressive (10%) strategies side-by-side with 20-year projections for each
• Monte Carlo Simulation — 1,000-trial probabilistic analysis showing success probability, median/percentile outcomes, decade-by-decade probabilities, and 20 sample trial paths with status tracking
• Expense Breakdown — Categorized expense tracker with automatic percentage calculations, optimization insights, pie chart visualization, and data validation dropdowns
• Savings Accelerator — Impact analysis across 15 savings levels ($500–$10,000/mo) showing exactly how each dollar changes your FIRE timeline, with embedded bar chart
• Tax Optimization — Traditional 401(k) vs Roth IRA vs Taxable vs HSA comparison with 20-year projections, contribution order recommendations, and after-tax value estimates
• Sequence of Returns Risk — Pre-retirement crash impact analysis (30% drop scenarios at various timings) with mitigation strategies and cash tent recommendations
• FIRE Scorecard — Rate yourself across 10 dimensions (savings rate, emergency fund, debt ratio, investment knowledge, income diversification, health insurance, housing cost, tax optimization, insurance, lifestyle inflation) with weighted scoring and action items
• Changelog — Complete version history documenting every update

Key Features

• 40+ automated calculations — FIRE Number, savings rate, projected FIRE age, passive income, Monte Carlo percentiles, tax projections
• 12 integrated sheets — All linked via cross-references; change inputs once, everything updates
• 3 embedded charts — Portfolio growth line chart, expense distribution pie chart, savings impact bar chart
• 1,000-trial Monte Carlo — Probabilistic analysis with success rates, percentile ranges, and decade-by-decade breakdowns
• Data validation dropdowns — FIRE type selector, expense priority ratings, reduction potential scores
• Conditional formatting — Color-coded FIRE status, scorecard indicators, risk heat map
• Professional design — Dark navy headers, gold accents, alternating row colors, consistent typography
• Print-ready formatting — Clean borders, proper alignment, scannable layout

Who It's For

• Anyone pursuing Financial Independence / Retire Early (FIRE) at any stage
• Investors who want to visualize their retirement timeline across multiple scenarios
• People comparing Lean FIRE, Coast FIRE, Barista FIRE, and Fat FIRE strategies
• Financial planners and advisors seeking a professional client analysis tool
• Anyone who wants to stress-test their retirement plan against market crashes and bad sequences

Technical Details

• XLSX format — compatible with Excel, Google Sheets, and LibreOffice Calc
• All formulas included — just enter your numbers in the gold-highlighted cells
• No macros required — works on all platforms including mobile Excel
• Pre-populated with realistic defaults so you can see it working immediately

Recent Updates

• v2.0 (April 2026): Complete overhaul — expanded from 6 to 12 sheets. Added: Dashboard KPI hub, Monte Carlo simulation (1,000 trials), Tax Optimization comparison, Sequence of Returns Risk analysis, FIRE Scorecard with 10 weighted dimensions, enhanced Savings Accelerator with 15 scenarios, improved Expense Breakdown with pie chart, professional color scheme overhaul, data validation dropdowns, conditional formatting throughout, and 40+ automated calculations
• v1.5 (March 2026): Added FIRE Scenarios comparison sheet
• v1.4 (February 2026): Added Savings Accelerator impact analysis
• v1.0 (October 2025): Initial release

Disclaimer: This spreadsheet is for educational and planning purposes only. It does not constitute financial advice. Always consult a qualified financial advisor before making investment decisions.