The 4% Financial Independence Guideline
Estimate financial independence at 25 times annual spending
- Difficulty
- Starter
- Time to result
- ~days to results
- Steps
- 3
- Confidence
- 99%
The 4% guideline links annual spending to an indicative financial-independence portfolio. Start with the amount needed each year and multiply it by 25. A person spending $100,000 annually would therefore estimate a target of $2.5 million. The relationship works in reverse: 4% of a $2.5 million portfolio is $100,000. Collins attributes the original withdrawal concept to financial adviser Bill Bengen and mentions the Trinity study as supporting a 4% baseline. He explicitly prefers guideline to rule because the figure is not hard and fast. In the episode, its purpose is diagnostic: it lets someone compare invested assets with spending and recognize when work may be financially optional. It is a compact estimate, not a guarantee that a specific portfolio will survive every future scenario.
Origin
Collins attributes the 4% withdrawal idea to Bill Bengen and says the Trinity study supported it as a baseline.
Core principles
- 01Annual spending determines the target
- 02Four percent and 25 times spending are inverse expressions
- 03The result is a baseline, not a guarantee
- 04Lower spending reduces required capital
How to run it
- 1
Measure annual spending
Estimate the annual amount the portfolio must support, using actual spending where possible.
Pro tip Separate recurring costs from exceptional expenses.
Watch out Understated spending produces an understated target.
- 2
Multiply by 25
Multiply annual spending by 25 to produce the portfolio estimate.
Pro tip Check the arithmetic by taking 4% of the result.
Watch out The number is a baseline, not a promise.
- 3
Compare with investments
Compare the estimate with assets intended to fund spending.
Pro tip Recalculate when spending changes materially.
Watch out The episode does not establish that every asset should be counted identically.
In the wild
A banker told Collins she spent $100,000 a year and had $5 million invested. Multiplying spending by 25 produced a $2.5 million baseline, so Collins said she had twice the amount indicated by the guideline.
→ The calculation suggested financial independence under the stated baseline.
Common mistakes
Using income instead of spending
The target is driven by what the portfolio must provide, not prior salary.
Calling four percent a guarantee
Collins explicitly describes it as a guideline with variations.
Is it for you?
Best for
It is best for a first-pass financial-independence estimate based on expected spending.
Not ideal for
It is not ideal as a personalized withdrawal plan because taxes, fees, lifespan, asset mix, and changing expenses are not evaluated.
From the transcript
“If you need 100,000 to live on, you need two and a half million invested.”
“I don't like the word rule because that implies that it's hard and fast.”
From the episode
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