FIRE CALCULATOR

FIRE Calculator — Financial Independence & Retire Early Timeline

Free FIRE calculator for US savers. Model your Financial Independence / Retire Early timeline with an inflation-adjusted FIRE number, savings rate, withdrawal rate, and age milestones from 25% to 100% of the goal.

1. Personal Details

Your age today.
Total income before taxes.
What you spend per year — the basis of your FIRE number.
Current retirement and brokerage balance.

2. Investment & Inflation Assumptions

Long-term average net return.
Used to inflate future expenses and the FIRE number.
Expected annual raise on your income.
How much your lifestyle spending grows above inflation.

3. FIRE Target & Strategy

Variant affects the effective target multiplier.
4% is standard. 3.5% is conservative. 5% is aggressive.
Present-value target based on today's expenses.
Inflation-adjusted target for the year you reach FIRE.

4. Reference & Notes

FIRE ANALYSIS

Financial Independence / Retire Early

Reference: FIRE-2026-001
Date:
Current Age 30
FIRE Age 48
Years to FIRE 18
FIRE Number (Future $) $1,702,675.00
Savings Rate 50.0%
Projected Balance at FIRE $1,750,000.00
Safe Withdrawal / Month $5,675.00
FIRE Status 🟡 On Track

FIRE Progress Breakdown

Current Savings $50,000.00
Annual Savings (Today) $40,000.00
FIRE Number (Today's $) $1,000,000.00
Progress (Today) 5.0%

FIRE Milestones

25% Progress Age 38
50% Progress Age 43
75% Progress Age 46
100% FIRE Age 48

FIRE Formula

FIRE Number (today's $) = Annual Expenses ÷ Withdrawal Rate

FIRE Number at Retirement = FIRE Number × (1 + Inflation)^Years to FIRE

The calculator inflates future expenses so your FIRE number reflects the actual target you need at retirement, not today's expenses.

Notes

FIRE journey planning for financial independence

This calculation is for informational and educational purposes. FIRE projections depend on long-term returns, inflation, taxes, health care costs, and personal circumstances. Consult a licensed financial advisor and tax professional for decisions specific to your situation.
Prepared By
Date
GUIDE

How to Use This FIRE Calculator

This free FIRE calculator estimates your Financial Independence, Retire Early timeline using your income, expenses, savings, and expected investment return. Unlike simple FIRE calculators, it inflates future expenses to compute the FIRE number you'll actually need at retirement, not just a multiple of today's spending. For the broader retirement picture, pair it with our Retirement Calculator and Retirement Income Calculator.

1

Enter Personal Details

Age, annual income, annual expenses, and current invested savings.

2

Set Assumptions

Expected return, inflation, income growth, and lifestyle-expense growth.

3

Choose a FIRE Variant

Standard, Lean, Fat, Coast, or Barista FIRE. Set the withdrawal rate — 4% is standard.

4

Review FIRE Age & Milestones

See FIRE age, years to FIRE, savings rate, and 25 / 50 / 75 / 100% milestone ages.

5

Save, Print or Export

Save a draft, print results, or download a PDF of the analysis for your records.

FIRE EDUCATION

What Does a FIRE Calculator Calculate?

A FIRE calculator estimates how long it will take you to reach financial independence — the point at which your investment portfolio can cover your living expenses indefinitely without further work income. It combines your savings rate, investment return, and withdrawal rate to project the number of years until you hit your FIRE number.

Key FIRE calculations

  • FIRE Number (today's $): Annual expenses ÷ withdrawal rate — the present-value target.
  • FIRE Number at Retirement: The nominal target, inflated by expected inflation over your accumulation period.
  • Savings Rate: (Income − Expenses) ÷ Income. The single best predictor of FIRE age.
  • FIRE Age and Years to FIRE: The age at which your portfolio hits the inflation-adjusted target.
  • Milestone Ages: The ages at which you reach 25%, 50%, 75%, and 100% of your FIRE number.
  • Safe Monthly Withdrawal: Portfolio × withdrawal rate ÷ 12 — the income your portfolio supports.

Who can use this FIRE calculator?

  • FIRE Seekers: Plan and track the path to financial independence.
  • Young Professionals: See how savings rate affects early retirement timeline.
  • Mid-Career Savers: Check whether you're on track and whether increasing savings closes the gap.
  • Coast FIRE Planners: Estimate when you can stop contributing and coast to retirement.
  • Financial Planners: Provide FIRE-focused projections for clients exploring early retirement.
METHODOLOGY

FIRE Calculator Methodology

MoneyTool uses the standard FIRE framework, with inflation properly applied to the target. Every derived metric is transparent about what it captures.

1. FIRE number (today's dollars)

FIRE Number (Today) = Annual Expenses ÷ Withdrawal Rate

At a 4% withdrawal rate, this equals 25× annual expenses. At 3.5%, it equals 28.6×. At 5%, 20×.

2. FIRE number at retirement (nominal)

FIRE Number (Nominal) = FIRE Number (Today) × (1 + Inflation)Years to FIRE

This is the actual balance you need at the moment you retire, given inflation over the accumulation period. It is what the calculator uses as the target during simulation.

3. Year-by-year simulation

Each year:

Balance(t+1) = Balance(t) × (1 + r) + Savings(t)

where Savings(t) = Income(t) − Expenses(t), income grows by income growth, and expenses grow by inflation plus lifestyle growth.

4. Savings rate

Savings Rate = (Income − Expenses) ÷ Income

Historically, savings rate is the single best predictor of FIRE age:

  • 10% savings rate → ~51 years to FIRE
  • 25% savings rate → ~32 years
  • 50% savings rate → ~17 years
  • 65% savings rate → ~11 years
  • 75% savings rate → ~7 years

5. Milestone ages

The calculator records the first year in which your inflation-adjusted balance crosses 25%, 50%, 75%, and 100% of the (inflated) FIRE number.

6. Safe monthly withdrawal

Safe Monthly Withdrawal = Portfolio × Withdrawal Rate ÷ 12

At 4% on a $1.75M portfolio, this equals $5,833/month.

Important assumptions

  • Returns are modeled as constant annual percentages, not sequences of returns.
  • Taxes, health care costs, Social Security, and pensions are not modeled.
  • The withdrawal rate is assumed sustainable — sequence-of-returns risk is not modeled.
  • Health care before Medicare age is a common FIRE risk not captured here.
  • This is an educational estimate, not investment or retirement advice.
E-E-A-T & SOURCES

FIRE Information, Sources & Editorial Review

MoneyTool separates calculation results from financial education and personalized advice. The calculator uses documented FIRE methodology and inflation-adjusted targets, while external guidance should be verified with authoritative sources.

Author and editorial responsibility

Methodology reviewed by the MoneyTool Finance Expert Team, a group of accountants, CPAs, and personal-finance analysts who maintain MoneyTool's calculator library and financial education content.

Last reviewed: | FIRE / safe-withdrawal methodology

Next review: When calculation logic, supported inputs, or relevant guidance changes.

Authoritative U.S. retirement and FIRE resources

  • SEC — Investor.gov: SEC Investor.gov: Retirement Plans provides investor education on retirement accounts, compounding, and long-term planning.
  • SEC — Compound Interest Calculator: SEC Compound Interest Calculator is the regulator's illustrative compounding tool.
  • IRS — Retirement Topics: IRS Retirement Plans covers contribution limits, catch-up rules, and distribution rules relevant to FIRE planning.
  • Social Security Administration: SSA Retirement Benefits provides benefit estimates that can reduce the portfolio requirement for FIRE.
  • U.S. Department of Labor — Employee Benefits Security Administration: EBSA regulates workplace retirement plans under ERISA and provides participant education.
  • FINRA — Retirement Accounts: FINRA Investor Education offers practical guidance on retirement accounts and long-term saving.
  • Consumer Financial Protection Bureau: CFPB Retirement Resources covers retirement planning and consumer protections for retirement products.
  • Federal Reserve — Survey of Consumer Finances: Federal Reserve SCF provides national data on household saving, wealth, and retirement preparedness.

External resources are provided for education and verification. MoneyTool is not affiliated with or endorsed by the SEC, IRS, SSA, DOL, EBSA, FINRA, CFPB, or Federal Reserve.

BEST PRACTICES

Tips for FIRE Success

FIRE is achieved through a combination of savings rate, investment returns, and time. The savings rate is the lever you control most directly.

Maximize Savings Rate

Savings rate drives FIRE age more than returns. Going from 30% to 50% cuts years to FIRE roughly in half.

Invest in Low-Cost Index Funds

A globally diversified portfolio of low-cost index funds is the standard FIRE approach.

Reduce Fixed Expenses

Housing and transportation dominate most budgets. Cutting them has the highest impact.

Plan for Health Care

Health insurance before Medicare is a major FIRE cost. Budget for it explicitly.

Use Tax-Advantaged Accounts

401(k), IRA, HSA, and Roth accounts reduce lifetime tax drag and accelerate FIRE.

Consult a Professional

For FIRE planning, walk the numbers through with a fee-only financial advisor and a tax professional.

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FAQ

Frequently Asked Questions About FIRE

What is FIRE?

FIRE stands for Financial Independence, Retire Early. It is a movement focused on saving and investing aggressively so that a portfolio can cover living expenses without requiring traditional employment. The two most common formulas are the 4% rule (25× expenses) and the 3.5% rule (approximately 28.5× expenses).

What is the 4% rule in FIRE?

The 4% rule comes from the Trinity Study and suggests that a retiree can withdraw 4% of their portfolio in year one and increase that amount with inflation thereafter, with a high probability of not running out of money over a 30-year retirement. It implies a FIRE number of 25× annual expenses.

What is a good savings rate for FIRE?

A savings rate of 50% or higher is common in the FIRE community. At a 50% savings rate, you can typically reach financial independence in about 17 years. At 65%, in about 11 years. At 75%, in about 7 years.

Should I use my current expenses or future expenses for the FIRE number?

You should use your projected expenses at the age you plan to retire, not today's expenses. A $40,000 expense today at 3% inflation becomes roughly $68,000 in 18 years, requiring a FIRE number of about $1.7M, not $1.0M.

What is Coast FIRE?

Coast FIRE is having enough invested that, without additional contributions, compounding alone will grow the portfolio to your full FIRE number by traditional retirement age. Until then, you only need to cover current expenses with work income.

What is Barista FIRE?

Barista FIRE is a hybrid approach where you save enough that part-time or lower-paying work covers health insurance and basic expenses, while your portfolio covers the rest. It reduces the required portfolio size versus full FIRE.

Is this FIRE calculator free?

Yes. MoneyTool provides this FIRE calculator free for educational and planning use.

Can I save my FIRE projection?

Yes. Save Draft stores the calculator inputs in your browser. Print Results and Download PDF can be used to keep a copy of the displayed analysis.

LEGAL

FIRE Calculator Disclaimer

This FIRE calculator provides estimates for informational and educational purposes. It does not constitute financial, legal, tax, accounting, or investment advice. Actual results depend on market returns, sequence-of-returns risk, health care costs, taxes, Social Security, and personal circumstances.

  • Estimates only: Results depend on the inputs and assumptions described in the methodology.
  • Not a projection of actual returns: Sequence-of-returns risk is not modeled.
  • Tax treatment simplified: Taxes on withdrawals are not modeled.
  • Verify before acting: Consult a licensed financial advisor and tax professional before making FIRE decisions.
Last methodology review: . Calculator logic and educational content should be reviewed again whenever the methodology, supported inputs, or relevant external guidance changes.