Question 1

What is the 4% safe withdrawal rule?

Accepted Answer

The 4% rule comes from the 1994 Trinity Study, which examined historical stock and bond portfolios over 30-year retirement periods. A portfolio invested in 50–75% stocks historically sustained 4% annual withdrawals in 95%+ of historical scenarios. For 40+ year retirements (typical FIRE scenarios), many researchers recommend 3–3.5% instead.

Question 2

What does FIRE stand for?

Accepted Answer

FIRE stands for Financial Independence, Retire Early. The movement centers on aggressively saving and investing a high percentage of income — often 50–70% — to reach a portfolio large enough to live off indefinitely, typically at a much younger age than traditional retirement.

Question 3

What if the market crashes right after I retire?

Accepted Answer

Sequence-of-returns risk — experiencing poor returns in the first 5 years of retirement — is the biggest threat to a FIRE plan. Strategies to mitigate it include: maintaining 1–2 years of expenses in cash to avoid selling during downturns, using a slightly more conservative 3.5% withdrawal rate, or having a flexible spending plan that cuts discretionary spending during bear markets.

Question 4

Does Social Security count toward my FIRE number?

Accepted Answer

Yes — if you'll receive Social Security benefits, subtract your estimated annual benefit from your annual expenses before calculating your FIRE number. At age 62–70, this benefit could reduce your required portfolio by hundreds of thousands of dollars. Use SSA.gov's estimator for your projected benefit.

Question 5

What is Lean FIRE vs. Fat FIRE?

Accepted Answer

Lean FIRE means retiring on a very modest budget — often under $40,000/year — requiring a smaller portfolio but significant lifestyle constraints. Fat FIRE refers to retiring with enough savings to maintain a comfortable or even luxurious lifestyle, typically requiring $2M–$5M+ depending on spending. Barista FIRE and Coast FIRE are intermediate approaches involving part-time work.

Early Retirement FIRE Calculator