FIRE Calculator – Plan Your Financial Independence

Use this FIRE calculator to calculate your Financial Independence (FI) number and track your progress toward early retirement. Enter your annual expenses, current savings, income, expected return, and safe withdrawal rate — the tool shows your FI Number, time to reach FI, age at FI, and your progress percentage. Whether you’re pursuing leanFIRE, regular FIRE, or fatFIRE, this financial independence calculator helps you plan your journey.

FIRE Calculator
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Your FI Number —
Years to Reach FI —
Age at Financial Independence —
Your Savings Rate (%) — %
Progress to FI (%) — %
Current Net Worth —
⚠️ Illustrative only. Not financial advice. Please delete history timely, it may impact your browser performance.

History — FIRE Calculator

# Time Age Expenses Savings Income Savings Rate (%) Return (%) FI Number Years to FI Age at FI Action

Why Use This Financial Independence Calculator

The FIRE (Financial Independence, Retire Early) movement is about achieving freedom from the 9-to-5. This FIRE planning calculator helps you:

  • 💰 Find Your FI Number — know exactly how much you need to retire.
  • 📈 Track Your Progress — see how close you are to financial independence.
  • ⏱️ Plan Your Timeline — know when you’ll achieve FI.
  • 🔁 Optimize Your Savings — see how your savings rate impacts your journey.
  • 📜 Track Your History — save, review, and export past calculations to CSV or Excel.
  • 🔒 100% Private — all calculations run locally; your data never leaves your browser.

FIRE Formula Used by This Tool

FI Number = Annual Expenses ÷ Safe Withdrawal Rate

For example:

  • Annual Expenses: $40,000
  • Safe Withdrawal Rate: 4%
  • FI Number: $40,000 ÷ 0.04 = $1,000,000

Time to FI is calculated by simulating your investment growth with monthly contributions until you reach your FI Number.

Savings Rate is calculated as: (Annual Income − Annual Expenses) ÷ Annual Income × 100

How to Use This FIRE Planner

  1. Select your account currency from the picker in the site header.
  2. Enter your current age.
  3. Enter your annual expenses (how much you spend per year).
  4. Enter your current savings (your existing investment/savings balance).
  5. Enter your annual income (after tax — your take-home pay).
  6. Enter your savings rate (optional — leave at 0 to auto-calculate).
  7. Enter your expected annual return.
  8. Enter your safe withdrawal rate (e.g., 4 for 4%).
  9. The tool updates instantly — see your FI Number, time to FI, age at FI, savings rate, and progress.

Frequently Asked Questions

What is the FIRE movement?

FIRE stands for Financial Independence, Retire Early. It’s a movement focused on achieving financial independence through aggressive saving and investing, allowing you to retire much earlier than the traditional retirement age.

How is my FI Number calculated?

Your FI Number is calculated as: Annual Expenses ÷ Safe Withdrawal Rate. For example, if your annual expenses are $40,000 and your safe withdrawal rate is 4%, your FI Number is $1,000,000.

What is a safe withdrawal rate?

A safe withdrawal rate is the percentage of your portfolio you can withdraw each year without running out of money. The traditional 4% rule is based on US data, but many FIRE enthusiasts use 3-4% depending on their risk tolerance and time horizon.

How does my savings rate affect my FIRE journey?

Your savings rate is the single most important factor in FIRE. A higher savings rate means you’re saving more and spending less, which accelerates your path to financial independence dramatically.

What’s the difference between leanFIRE, regular FIRE, and fatFIRE?

LeanFIRE involves retiring with a bare-minimum lifestyle (lower expenses). Regular FIRE is the standard approach with moderate expenses. FatFIRE involves retiring with a high-expense lifestyle, requiring a much larger FI Number.

Is my data stored anywhere?

No. All calculations run locally in your browser. History and presets are saved in your browser’s localStorage — nothing is sent to a server.