Fat FIRE Calculator: retire wealthy.
Fat FIRE means never compromising your lifestyle in retirement — travel, hobbies, the works. Here's the number for the “retire wealthy” path, and how it stacks against a standard FIRE target.
Fat FIRE is financial independence at a high spending level — typically $100,000 or more per year of retirement spending. The math is identical to any other FIRE number — annual expenses ÷ safe withdrawal rate — but the inputs are larger, so the target portfolio lands in the $2.5M+ range at a 4% SWR. The trade-off is time: a bigger number takes longer to reach, unless your income lets you save aggressively. What you buy with the extra years is a thick safety margin for sequence-of-returns risk, healthcare shocks, lifestyle creep, and the freedom to keep traveling, supporting family, or pursuing hobbies without compromise. For high earners who already live below their means, Fat FIRE often feels like the most natural path.
Read the full explainer →Three steps to your number
- 1Start with Fat pre-selectedThe lifestyle segmented control loads with Fat ($100k/yr). Drag annual expenses to match your real target — $120k, $150k, $200k, whatever wealthy means to you.
- 2Pick your withdrawal rate4% is the Trinity Study default. Many Fat FIRE planners run 3.5% for extra sequence-of-returns safety since the portfolio is large enough to absorb it.
- 3Read your number and your paceThe big number is your shore line. The Plan slider below shows the monthly contribution needed to hit it by a chosen age.
Your numbers
retire wealthy — travel, hobbies, comfort, no compromise
That's 25.0× your annual spending — the classic 4% rule. At your current savings growing at 7%, you'd hit it around age 120 if you add nothing more.
Savings trajectory: age 35 → 55
Your savings grow at the real return rate (~3.9%). The dashed line is your FIRE number — the point where compounding alone gets you there.
| SWR | Multiplier | Target portfolio |
|---|---|---|
| 3% | 33.3× | $3,333,333 |
| 3.5% | 28.6× | $2,857,143 |
| 4% | 25.0× | $2,500,000 |
| 4.5% | 22.2× | $2,222,222 |
| 5% | 20.0× | $2,000,000 |
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The math, explained.
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How this number is calculated
Fat FIRE number = Desired annual spending ÷ Safe withdrawal rate. With $100,000 and a 4% SWR, that’s $100,000 ÷ 0.04 = $2,500,000. The delta bar compares it to a standard FIRE number at $40k spending ($1,000,000).
This page is a preset route of the FIRE Number calculator engine (PRD §5.0): the lifestyle segmented control loads with Fat pre-selected at $100k/yr, and the same The Plan slider and SWR comparison table render underneath. Read why we use 7% average returns or the 4% rule explained.