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INDEPENDENT INCOME · FIRE LEVEL 1–3

How much freedom can one small income stream buy?

Compare a full FIRE target with a semi-FIRE path where a modest, reliable income keeps covering part of life.

YOUR ASSUMPTIONS

Give one income stream a shape.

Use reliable, after-cost income estimates and today's money. This is a planning illustration, not investment advice.

WHAT THIS INCOME BUYS

$150,000 less required FIRE capital$500 each month covers 17% of essential spending, before portfolio withdrawals.
Full FIRE target$900,000No ongoing work assumed
Semi-FIRE target$750,0005 hours/week of independent work
Income per hour$23Before tax and business costs

TWO PATHS, ONE VIEW

What changes over time.

Full FIRESemi-FIRE income
Portfolio path toward full FIRE and semi-FIREThe same investment path reaches the lower semi-FIRE portfolio target sooner because independent income covers part of spending.$0$489,852$979,705$1,469,557$1,959,4100y6y11y17y22yFull FIRE: $900,000 target, about 19.0 yearsFull FIRE 19.0ySemi-FIRE 16.0y

Annual spending rises with 2.0% assumed inflation, and the portfolio uses a 7.0% nominal return. Monthly investments rise with inflation. Semi-FIRE means keeping this independent income stream.

HOW TO READ THIS

Income can buy time before it buys retirement.

This tool does not treat low-maintenance work as a failure of FIRE. It makes the trade-off visible: a stable independent income can lower the portfolio you need, while leaving you in control of how—and how much—you work.

SEMI-FIRE INCOME CALCULATOR EXPLAINED

How much independent income is enough to reduce your FIRE target?

Reliable income after leaving full-time work can cover part of annual spending, so the portfolio only needs to fund the remaining gap. This creates a semi-FIRE or Barista FIRE path rather than an all-or-nothing retirement date.

How to interpret the calculator result

01

Start with credible inputs

Enter income you can reasonably sustain, the weekly time it requires, your spending, current assets, contributions and withdrawal-rate assumption.

02

Read the result in context

Read the lower portfolio target together with the hours required. A smaller number is not automatically better if the income is fragile or the work recreates the life you wanted to leave.

03

Turn it into a decision

Compare several modest income levels and choose the smallest dependable stream that creates meaningful flexibility.

COMMON QUESTIONS

Questions about this semi-FIRE income calculator.

Does side income count toward FIRE?

It can support a semi-FIRE plan when it is repeatable and continues after full-time employment ends. Treat uncertain or seasonal income conservatively.

How do I calculate the portfolio reduction from income?

Subtract dependable annual income from annual spending, then divide the remaining spending by the withdrawal-rate assumption.

SPENDING AND INCOME FREEDOM HUB

Use both sides of the freedom equation.

Lower recurring costs reduce the portfolio your life requires. Dependable independent income covers part of what remains. Compare both levers, then judge their effect on time, attention and quality of life—not only the smaller FIRE number.

COMPANION TOOLPrice one recurring cost in FIRE capitalSeparate the lower-spending effect from the optional benefit of reinvesting the saving.
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EVIDENCE SNAPSHOT

What this tool is built on.

Independent Income Freedom Calculator. Compares full FIRE with a semi-FIRE path supported by a user-entered independent income stream.

This is implementation evidence, not professional certification. Assumptions and limits matter more than a badge. Correction policy.

Model version
1.0
Last reviewed
Evidence basis
Published formulas using your inputs
Data status
No live feed; results change only with your inputs
Decision sensitivity
Financial assumptions matter

CITE THIS TOOL

Let readers return to the same version.

This citation includes the tool name, model version, review date and stable URL. Citation does not imply Rich2Fire endorses third-party content.

Rich2Fire. (2026). Independent Income Freedom Calculator (model version 1.0, reviewed 2026-10-10). https://rich2fire.com/tools/independent-income-freedom-calculator

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