Your FIRE number is a precise dollar amount based on your actual expenses and withdrawal rate.
Financial Independence
FIRE number calculator that shows when you can retire early.
Enter your annual expenses, savings rate, current portfolio, and expected return to calculate your FIRE number, years to financial independence, and the savings pace needed to get there.
Direct answerYour FIRE number equals annual expenses divided by your safe withdrawal rate (typically 4%). At that portfolio size, investment returns cover your living expenses indefinitely. This calculator shows your number and how long it takes to reach it.
Browser-first workflow4% rule built inLean/fat FIRE context
1. Enter your details
CalculatorEnter your annual expenses, savings, expected return, and withdrawal rate to calculate your FIRE number and timeline.
Enter your financial details or load a sample scenario to calculate your FIRE number.
Live Tool
FIRE Number Calculator in the browser
Enter your financial details to calculate your FIRE number and years to financial independence.
Privacy-first workflow
This page runs in the browser. No financial data is sent to any server.
What this FIRE calculator solves
Financial independence requires a specific portfolio size. This calculator converts your lifestyle cost into a concrete number and shows how long it takes to get there.
See exactly how many years of saving at your current rate it takes to reach financial independence.
Model the effect of increasing your savings rate on years to FIRE.
Key signals
FIRE number, years to FIRE, current progress percentage, and savings gap.
Decision support
Lean FIRE vs fat FIRE context and optimization opportunities.
Detailed breakdown
Year-by-year portfolio growth projection to your FIRE number.
Uses the safe withdrawal rate to calculate the portfolio size that sustains your expenses indefinitely.
Compound growth modeling shows exactly when your portfolio reaches the target.
Current savings as a percentage of your FIRE number shows how far you have come.
Understand where your expense level falls on the FIRE spectrum.
Guide Below The Tool
How to use the FIRE number calculator well
Key concepts, practical steps, and guidance for planning financial independence.
A FIRE number calculator determines the investment portfolio size needed to cover your annual expenses using the safe withdrawal rate, then projects how long it takes to reach that number based on your savings and returns.
Anyone pursuing financial independence or early retirement, high-savings-rate households, and financial planners modeling client retirement scenarios.
Annual expenses determine your FIRE number. Savings rate determines your timeline. Expected return affects the projection but expenses and savings rate are the primary levers.
Workflow
Four practical steps
Use this calculator to set your FIRE target, then optimize savings rate and expenses to accelerate the timeline.
1
Calculate your annual expenses accurately.Include all recurring costs. Be honest about discretionary spending you want to maintain in retirement.
2
Choose your safe withdrawal rate.4% is standard for 30-year retirements. Use 3.5% or 3% for very early retirement (40+ year horizon).
3
Enter current savings and annual savings.Include all investment accounts: 401(k), IRA, taxable brokerage, and other investable assets.
4
Model scenarios.Try different expense levels, savings rates, and withdrawal rates to see how each change affects your timeline.
Review Checklist
What to validate first
Key assumptions that affect your FIRE calculation.
Underestimating expenses is the most common FIRE planning mistake. Track spending for 3-6 months to get a real number.
Before Medicare at 65, you need private insurance. This can add $500-1,500+ per month to your expenses.
The 4% rule accounts for inflation in withdrawals. Use real (inflation-adjusted) returns for more conservative projections.
Poor returns in the first few years of retirement have an outsized impact. Build a buffer above your FIRE number.
Pre-tax accounts (401k, Traditional IRA) require tax on withdrawals. Your FIRE number may need to be higher to account for taxes.
Social Security benefits at 62-70 can reduce your portfolio withdrawal needs, but do not rely on it as the sole plan.
Why This Page Exists
Built to turn the FIRE concept into a concrete number and timeline
Most FIRE content is inspirational but vague. This page gives you a specific dollar target and shows exactly how long it takes to get there.
Replace abstract goals with a specific portfolio target based on your actual expenses.
See years to FIRE based on your savings rate and returns, making the goal feel achievable.
Ledger Summit can build retirement planning tools for advisors and practices. This page delivers value right now.
FAQ
FIRE number calculator questions, answered directly
Short answers for searchers and answer engines.
Your FIRE number is the investment portfolio size needed to cover annual expenses indefinitely. At a 4% withdrawal rate, it equals 25 times your annual expenses.
The 4% rule states that withdrawing 4% of your portfolio in year one, adjusted for inflation annually, has a very high probability of lasting 30+ years.
Lean FIRE targets minimal expenses (under $40,000/year) for the earliest retirement. Fat FIRE targets $100,000+ per year with no lifestyle sacrifice.
Years to FIRE depends on savings rate, current savings, and expected returns. A 50% savings rate reaches FIRE in roughly 17 years from zero.
No. All calculations run in your browser. No financial data is sent to any server.
Next Step
Need financial independence planning tools for your practice?
Use the free calculator for personal FIRE planning. If you need client-facing retirement projections, Ledger Summit can build the next layer.
Book a free call