Lean FIRE is the most minimalist FIRE strategy, targeting annual expenses under $40,000. It pursues financial independence at the lowest possible cost, ideal for those willing to simplify their lifestyle and reduce consumption.

How much do you need for Lean FIRE?

Lean FIRE Target = Annual Expenses / Safe Withdrawal Rate. For example, with $30,000 annual expenses and a 4% withdrawal rate, you need $750,000. Using a more conservative 3.5% rate, you'd need ~$857,000.

What's the difference between Lean, Fat, and Coast FIRE?

Lean FIRE targets the lowest spending; Fat FIRE maintains a higher lifestyle; Coast FIRE reaches a tipping point then stops saving, relying on compound growth. Lean FIRE is the fastest path but with the most frugal lifestyle.

Lean FIRE Calculator - Financial Independence

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Free

Minimalist financial independence — retire early with the lowest possible living costs.

Enter Your Data

💰 Annual Expenses ($)

Your minimum annual living expenses

📈 Expected Return (%)

Expected annual portfolio return (default 7%)

🔒 Safe Withdrawal Rate (%)

Typically 3-4% (conservative: 3.5%)

⏳ Planned Retirement Years

Expected years in retirement

🎯 Lean FIRE Target

Total assets needed

📅 Monthly Budget
-
Monthly spendable in retirement

📊 Traditional FIRE (25×)

Traditional FIRE needs 25× expenses

Lean FIRE Progress0%

📘 What is Lean FIRE?

Lean FIRE is the most minimalist FIRE strategy, targeting annual expenses under $40,000. It's for those who want financial independence as quickly as possible by minimizing lifestyle costs.

FIRE Comparison

Lean FIRE: Minimalist living, fastest to achieve
Fat FIRE: Maintains higher lifestyle
Coast FIRE: Stop saving at tipping point, let compound interest work

How It's Calculated

Target Assets = Annual Expenses / Safe Withdrawal Rate. E.g., $30,000 expenses at 4% SWR = $750,000. At a more conservative 3.5%, you'd need ~$857,000.

Enter Your Data

📘 What is Lean FIRE?

FIRE Comparison

How It's Calculated

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