FIRE number

FIRE Number Calculator: understand the target behind your year.

A FIRE number is the portfolio target amount, one of two capital checks behind the Financial Independence Year. It comes from annual spending and the selected portfolio target; projected invested assets are tested against it and the separate duration requirement.

Question this answersHow does a FIRE number connect to the Financial Independence Year?
Simple termsEstimate, not adviceExplains calculator inputs
  1. 01
    What it means

    Start with the plain meaning.

  2. 02
    How it affects the year

    See how this connects to the estimate.

  3. 03
    What to check

    See what the estimate leaves out.

Why this matters

What this means.

A standalone target can feel abstract and does not determine the year by itself. The Financial Independence Year adds timing and a duration check, so the number is read alongside spending, assets, contributions, return setting, and the portfolio target multiple.

Year impact

How this can move the year.

A larger FIRE number can make the spending threshold take longer to reach. A lower number can move the year earlier, but only when the separate duration requirement is also met.

How it is used

How the calculation uses it.

The calculation multiplies annual spending by the selected portfolio target, projects assets over time, and returns the first year both checks pass: the portfolio target amount and the duration requirement.

Estimate limits

What can make the estimate change.

The spending-based amount changes with spending or the selected portfolio target. Tax, access to money and later withdrawals are not modeled separately, so the amount is not a complete retirement plan.

Checks

Checks before you use the number.

Use these prompts to read the estimate carefully. They are not recommendations.

  • Check the annual spending implied by the monthly spending input.
  • Check whether the portfolio target is the multiple you intended to test.
  • Check the year as well as the target number, because timing changes the result.

Calculator connection

Calculate your Financial Independence Year

Use the calculator to test spending, invested assets, monthly contributions, return setting, and the portfolio target together.

Calculate your Financial Independence YearSee how the year is calculated

Read next

Read one assumption at a time, then use the calculator when you want to test the inputs.

Next in this path 2 of 4Monthly spendingMonthly spending is annualised for both the spending threshold and the duration requirement.

Related assumptions

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