Chubby FIRE
Guide · By Kevin Lan · Updated September 2026
Chubby FIRE is the comfortable middle of the FIRE spectrum — more than a standard budget, short of Fat FIRE. A relaxed lifestyle without the largest possible number.
What Chubby FIRE means
Chubby FIRE targets a comfortable budget above a standard FIRE budget but below Fat FIRE — commonly framed as roughly 1.5× a standard budget. On a $50,000 standard budget, that's about $75,000 a year, which at a 4% withdrawal rate is a FIRE number of about $1,875,000. The formula is the same as any FIRE number (annual expenses ÷ safe withdrawal rate); Chubby simply sets the spending target in the comfortable middle.
The term is loosely defined — some describe it by portfolio size rather than a multiple — but the shared idea is a retirement with real margin for travel, dining, and the occasional splurge, without stretching to the Fat FIRE target.
Chubby FIRE on the spectrum
Chubby sits one step in from the top:
- Lean FIRE — a frugal budget, roughly 0.7× standard (often under $40,000).
- Standard FIRE — your actual expenses (a $50,000 budget → a $1,250,000 number).
- Chubby FIRE — roughly 1.5× standard (about $75,000 → $1,875,000). Comfortable, with margin.
- Fat FIRE — roughly 2× standard ($100,000+ → $2,500,000+). No compromises.
They differ only in the spending target, not the math — so moving between them is just a matter of the budget you plan around.
What it takes to reach it
A Chubby target sits about 50% above a standard one, so it asks for a larger portfolio and, usually, a longer runway or a higher savings rate. The practical appeal is balance: you reach it sooner than Fat FIRE, but retire with more breathing room than a standard or Lean budget allows. As with every variant, three levers move the date — what you have invested, what you add each year, and your expected real return.
How the app computes it
Choose the Chubby FIRE variant in the calculator below and it applies the comfortable-budget multiplier to your own figures, returning your number and the year you reach it. The iPhone app turns that date into a home-screen countdown that moves as your investments grow.
References
- Bengen WP. Determining withdrawal rates using historical data. Journal of Financial Planning. 1994;7(4):171–180. The paper that introduced the 4% withdrawal guideline.
- Cooley PL, Hubbard CM, Walz DT. Retirement savings: choosing a withdrawal rate that is sustainable. AAII Journal. 1998;20(2):16–21. Widely known as the “Trinity study.”
- Investopedia. Financial Independence, Retire Early (FIRE): a definition. investopedia.com
- Robin V, Dominguez J. Your Money or Your Life. Revised ed. New York: Penguin Books; 2018. A foundational text of the financial-independence movement.
FIRE calculator
Runs in your browser — nothing is sent anywhere.
Frequently asked questions
What is Chubby FIRE?
Chubby FIRE is a comfortable version of financial independence — a budget above a standard FIRE budget but below Fat FIRE, commonly framed as roughly 1.5× a standard budget. It funds a relaxed lifestyle with real margin, without stretching to the largest target.
How much money do you need for Chubby FIRE?
On a $50,000 standard budget, Chubby FIRE at about 1.5× means roughly $75,000 a year, or a portfolio near $1,875,000 at a 4% withdrawal rate. The exact number depends on your own spending; the calculator computes it from your figures.
What's the difference between Chubby FIRE and Fat FIRE?
Chubby FIRE is the comfortable middle (about 1.5× a standard budget); Fat FIRE is the upper tier (about 2×, often $100,000+ a year). Chubby is reached sooner and costs less; Fat funds a larger lifestyle. The math is identical — only the spending target differs.