Calculate your path to Financial Independence and Retire Early (FIRE). See your FIRE number, years to financial freedom, Coast FIRE milestone, and detailed net worth projections based on your savings rate and investment returns.
Financial Independence, Retire Early (FIRE) is more than a retirement strategy — it is a framework for achieving freedom. Whether you want to leave your 9-to-5, travel the world, pursue a passion project, or simply have the peace of mind that comes with financial security, understanding your FIRE number is the first step.
FIRE is built on a simple equation: save aggressively, invest wisely, and let compound growth do the heavy lifting. Your FIRE number equals your annual expenses divided by your withdrawal rate (typically 4%, based on the 4% rule from the Trinity Study). If you spend $40,000 per year, you need $1,000,000. If you spend $80,000, you need $2,000,000. Reducing expenses has a double effect: it increases how much you save AND decreases how much you need.
| Savings Rate | Approx. Years to FIRE |
|---|---|
| 10% | 51 years |
| 25% | 32 years |
| 50% | 17 years |
| 75% | 7 years |
| 90% | Under 3 years |
Assumes 5% real (inflation-adjusted) investment returns and $0 starting savings.
All three profiles earn $100,000/year, invest at 7% real returns, and start with $50,000 saved:
| Profile | Annual Spending | Savings Rate | FIRE Number | Years to FIRE |
|---|---|---|---|---|
| Lean FIRE | $30,000 | 70% | $750,000 | ~8 |
| Regular FIRE | $50,000 | 50% | $1,250,000 | ~15 |
| Fat FIRE | $80,000 | 20% | $2,000,000 | ~30 |
The Lean FIRE path reaches independence in 8 years but requires living on $2,500/month permanently. Regular FIRE takes 15 years with a balanced lifestyle. Fat FIRE takes 30 years but preserves a comfortable spending level. The right path depends on what you value most: time or spending flexibility. Use our budget planner to find your true annual spending.
The 4% rule (from the 1998 Trinity Study) found that a 50/50 stock/bond portfolio survived 30 years in 95% of historical periods at a 4% initial withdrawal rate. However, early retirees need to consider several nuances:
Early retirees face unique challenges since traditional retirement accounts have penalties for withdrawals before age 59.5. Common strategies include: building a 5-year cash buffer, using Roth IRA contribution withdrawals (always penalty-free), performing Roth conversion ladders, and maintaining taxable brokerage accounts for bridge years. Many FIRE practitioners also maintain some form of part-time or freelance income, especially in the early years.
Reviewed by Tahir Özcan · Founder, WealthCalc · Editorial policy
FIRE number calculated as annual expenses × 25 (based on the 4% rule from the Trinity Study). Projects savings trajectory with compound growth and estimates years to financial independence. Tax-advantaged account limits shown in the key figures box come directly from IRS Notice 2025-67 and Rev. Proc. 2025-19.
Data Sources:
4 In-Depth Guides
Everything you need to know about Financial Independence, Retire Early. Calculate your FIRE number, explore Lean FIRE and Coast FIRE, and build your action plan.
Read Full GuideUnderstand the three main types of FIRE (Financial Independence, Retire Early) and calculate which one matches your lifestyle and goals with real numbers and examples.
Read Full GuideLearn how Barista FIRE lets you leave your full-time career years earlier by combining part-time income with investment growth. Includes 2026 numbers and a step-by-step plan.
Read Full GuideDetailed guide to accessing retirement accounts early without penalties. Covers Roth ladders, Rule 72(t), taxable bridge accounts, and the 2026 SECURE 2.0 updates.
Read Full GuideFIRE stands for Financial Independence, Retire Early. It is a lifestyle movement focused on aggressive saving and investing to accumulate enough wealth that investment returns can cover your living expenses indefinitely — freeing you from the need to work for money. FIRE followers typically save 50-70% of their income and aim to retire in their 30s or 40s, decades earlier than traditional retirement age.
Your FIRE number is calculated by dividing your target annual spending by your safe withdrawal rate. Using the standard 4% rule, if you need $50,000 per year in retirement, your FIRE number is $50,000 / 0.04 = $1,250,000. Once your invested assets reach this amount, you can theoretically withdraw 4% annually (adjusted for inflation) without running out of money over a 30+ year retirement.
The 4% rule comes from the Trinity Study, which found that a retiree can withdraw 4% of their portfolio in the first year of retirement (adjusting for inflation each year after) with a very high probability of the money lasting at least 30 years. For early retirees with potentially 40-60 year retirements, some financial planners recommend a more conservative 3.25-3.5% withdrawal rate for added safety.
Coast FIRE means you have saved enough that your existing investments will grow to your full FIRE number by traditional retirement age (65) through compound growth alone — without any additional contributions. Once you reach Coast FIRE, you only need to earn enough to cover your current expenses, allowing you to work less, switch to a less stressful job, or pursue passion projects.
Lean FIRE means reaching financial independence with a minimalist budget — typically under $40,000/year per person. It requires a smaller portfolio but demands a frugal lifestyle. Fat FIRE targets a more comfortable retirement spending level, often $80,000-$120,000+ per year, requiring a larger portfolio but allowing for more lifestyle flexibility. Our calculator shows your Lean FIRE number at 60% of your target spending.
Your savings rate is the most important factor determining when you reach FIRE. At a 10% savings rate, FIRE takes roughly 50 years. At 25%, about 32 years. At 50%, approximately 17 years. At 75%, around 7 years. The math is powerful: every percentage point increase in your savings rate simultaneously increases the amount you invest AND reduces the amount you need to live on in retirement, accelerating your timeline from both sides.
Get a complete picture of your finances by combining this tool with our other free calculators and in-depth guides.
Last reviewed:
FIRE number calculated as annual expenses × 25 (based on the 4% rule from the Trinity Study). Projects savings trajectory with compound growth and estimates years to financial independence. Tax-advantaged account limits shown in the key figures box come directly from IRS Notice 2025-67 and Rev. Proc. 2025-19.
Figures are updated whenever the IRS, SSA, CMS, FHFA, HHS, or BLS publishes a new inflation adjustment or statutory change. This tool is for educational purposes only and does not constitute tax, legal, or investment advice. Consult a qualified professional for decisions affecting your personal finances.
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