🌱 Minimal FIRE Tool

Lean FIRE Calculator

Estimate the portfolio needed to retire on a lean annual spending target.

Your numbers

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Affiliate Placement

Build a simpler money plan.

Use this slot for budgeting apps, FIRE dashboards, or personal finance templates.

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How this Lean FIRE calculator works

Lean FIRE estimates the portfolio needed to retire on a lower annual spending level.

Lean FIRE Number = Lean Annual Expenses ÷ Withdrawal Rate

Best use case

  • Minimalist retirement planning.
  • Testing lower spending scenarios.
  • Comparing Lean FIRE with regular FIRE or Fat FIRE.

Important note

Lean FIRE can be sensitive to healthcare, housing, taxes, and unexpected lifestyle changes.

Related tools

FIRE CalculatorFind your FIRE number→FIRE Number CalculatorFind the portfolio needed for FIRE→Coast FIRE CalculatorSee if you can stop investing→Savings Rate CalculatorCalculate your savings rate→

FAQ

What is Lean FIRE?

Lean FIRE means reaching financial independence with a relatively low spending target.

Is Lean FIRE realistic?

It can be realistic for low-cost lifestyles, but it leaves less margin for surprises.

How to Use This Calculator

  1. Enter your financial information in the input fields.
  2. Adjust assumptions such as return rate, inflation, or spending.
  3. Review the calculated results and projections.
  4. Compare alternative scenarios to improve planning.

Example Calculation

Example values are provided to demonstrate how the calculator works. Adjust the inputs to match your own situation and compare outcomes.

Formula

This calculator uses standard financial planning formulas and projections based on the values entered above. Results are estimates and should be used for educational purposes only.

Frequently Asked Questions

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FIRE & Retirement

Retirement CalculatorEstimate retirement age and monthly investing target→FIRE Number CalculatorFind the portfolio size needed for financial independence→Coast FIRE CalculatorKnow if you can stop investing→Lean FIRE CalculatorPlan a low-cost retirement→Fat FIRE CalculatorPlan a higher-comfort retirement→Safe Withdrawal Rate CalculatorEstimate retirement withdrawals→Savings Rate CalculatorCalculate savings rate and rough FIRE timeline→

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Loans & Planning

Mortgage CalculatorEstimate home loan payment and total interest→Loan CalculatorCalculate monthly loan payment and payoff cost→Emergency Fund CalculatorPlan 3 to 12 months of cash reserves→Savings Goal CalculatorPlan how long it takes to reach a target→Budget CalculatorBreak down income, spending, and savings rate→

Real Estate

Rent vs Buy CalculatorCompare renting with buying over time→House Affordability CalculatorEstimate a comfortable home price range→Rental Yield CalculatorEstimate yield, cash flow, and cash-on-cash return→Real Estate ROI CalculatorEstimate property profit and annualized return→

Cash Flow & Debt

Opportunity Cost CalculatorCompare spending today with the future value of investing that money→Passive Income CalculatorEstimate the assets needed to create a target monthly passive income→Cash Flow CalculatorMeasure monthly surplus, savings rate, and annual free cash flow→Debt Snowball CalculatorPlan debt payoff by targeting the smallest balances first→Debt Avalanche CalculatorPlan debt payoff by targeting the highest interest rates first→

Wealth

Net Worth CalculatorCalculate assets minus debt→Future Value CalculatorEstimate future portfolio value→