Fat FIRE Calculator
Plan for retirement with a high annual spend — travel, dining, experiences. See your Fat FIRE number, timeline, and which FIRE tier you're targeting.
Your Situation
Fat FIRE Target
$3.43M
🔥 You reach Fat FIRE
Age 54 · 2050
24 years from now · $120,000/year in retirement
Fat FIRE Number
$3.43M
$120,000/yr ÷ 3.5%
Years to Fat FIRE
24 yrs
Retire in 2050
Savings Rate
47%
$70.0K saved/yr
Portfolio Progress
3%
$100.0K of $3.43M
Portfolio growth to Fat FIRE · Today's dollars
📬 One investing insight per week
Coast FIRE math and compound interest — free, every week.
How This Calculator Works
① FIRE tiers
The calculator labels your target as Lean FIRE, Regular FIRE, Fat FIRE, or Super Fat based on the portfolio size. Fat FIRE typically means a $2.5M–$5M portfolio supporting $100k–$200k/year in retirement spending.
② Lower withdrawal rate
Fat FIRE often uses a 3–3.5% withdrawal rate rather than 4%, because high earners tend to retire earlier and need portfolios to last 40–50 years. A lower SWR means a larger required portfolio but more security.
③ Real returns
All values are in today's dollars. Inflation is subtracted from the nominal return so your $120k/year retirement spending target means $120k in actual purchasing power.
FIRE tier guide
Lean FIRE — Portfolio under $1M · Under $40k/year spending · Frugal lifestyle, often geographic arbitrage
Regular FIRE — $1M–$2.5M portfolio · $40k–$100k/year · Average American lifestyle
Fat FIRE — $2.5M–$5M portfolio · $100k–$200k/year · Comfortable lifestyle, travel, no trade-offs
Super Fat FIRE — $5M+ portfolio · $200k+/year · Luxury, full financial optionality
Frequently Asked Questions
What is Fat FIRE?+
Fat FIRE is financial independence with a higher annual spending budget — typically $100,000 or more per year. Unlike Lean FIRE which requires frugality, Fat FIRE lets you maintain or exceed your current lifestyle in retirement: travel, dining out, hobbies, and experiences without trade-offs.
How much do I need for Fat FIRE?+
It depends on your target spending. At $100k/year and a 3.5% withdrawal rate, you need $2.86M. At $150k/year you need $4.3M. Use the calculator above to get your exact number based on your lifestyle target.
Why use 3.5% instead of 4% withdrawal rate?+
High earners pursuing Fat FIRE often retire early — in their 40s or even 30s. A portfolio needs to last 40–50 years rather than the 30 years the 4% rule was designed for. Dropping to 3.5% or 3% significantly increases the probability of the portfolio surviving longer retirements. The calculator defaults to 3.5% but you can adjust.
What is the difference between Fat FIRE and regular FIRE?+
The main difference is the lifestyle target in retirement. Regular FIRE typically targets $40k–$60k/year in spending. Fat FIRE targets $100k–$200k. The path to Fat FIRE usually requires a higher income, higher savings rate, and longer accumulation period — but the lifestyle reward is retirement without financial constraint.
Can I Fat FIRE on $200k income?+
Yes, many Fat FIRE achievers earned $150k–$300k. The key is maintaining a high savings rate (40%+) for 15–20 years. At $200k income, 50% savings rate, 7% real return, you can reach $2.5M in roughly 15 years from scratch. The calculator shows your exact timeline.
How much do you need for Fat FIRE?+
Fat FIRE typically requires $2.5M–$5M+ depending on your target lifestyle. At $100,000/year spending with a 4% withdrawal rate, you need $2,500,000. At $150,000/year, $3,750,000. At $200,000/year, $5,000,000. Many Fat FIRE planners use a 3–3.5% withdrawal rate for extra safety, which increases the target: $100,000/year at 3.5% requires $2,857,000. Use the calculator above for your specific spending target.
What income do you need to achieve Fat FIRE?+
Fat FIRE is most commonly achieved by people earning $150,000–$400,000+ per year who maintain high savings rates (40–60%) for 15–25 years. However income alone is not the key — savings rate is. A $200,000 earner saving 50% will reach Fat FIRE faster than a $300,000 earner saving 20%. High-income professionals in tech, medicine, law, and finance represent the majority of Fat FIRE achievers.
What is the difference between Lean FIRE and Fat FIRE?+
Lean FIRE targets a frugal retirement, typically under $40,000/year, requiring a portfolio of roughly $1,000,000. Fat FIRE targets a comfortable or luxurious retirement — $100,000–$200,000+/year — requiring $2.5M–$5M+. Regular FIRE falls in between, typically $40,000–$80,000/year. The right target depends entirely on your desired lifestyle, not an arbitrary number.
What is a realistic Fat FIRE timeline?+
Starting from zero with $200,000 income, 50% savings rate, and 7% real return, Fat FIRE at $2.5M takes approximately 18–19 years. With a $300,000 income and 55% savings rate, roughly 14–15 years. The most common accelerators are: increasing income through career growth, maintaining savings rate discipline through lifestyle inflation, and starting as early as possible to maximize compounding years.