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Financial independence tool

FIRE Calculator

In brief

Estimate the portfolio needed to cover your entered spending gap and how long a smooth-return scenario could take to reach it. FIRE means Financial Independence, Retire Early; reaching a modeled target does not guarantee retirement security.

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Last reviewed

Annual cash flow in today’s dollars

All three percentages are editable assumptions. The 4% default corresponds to a 25× spending-gap heuristic and is not a guarantee.

Estimated financial-independence target

$0

Current progress

0%

Estimated time

Estimated age

Projected portfolio in today’s dollars

How the FIRE estimate works

Spending gap: entered annual spending minus entered reliable annual income, never below zero. FIRE target: spending gap divided by the entered initial withdrawal rate. At 4%, this is the spending gap multiplied by 25.

The timeline converts the entered nominal return to an inflation-adjusted annual rate and adds the entered annual contribution at year-end. It stops when the modeled portfolio reaches the target or after 100 years.

This simplified model omits taxes, fees, benefit changes, contribution changes, market volatility, healthcare costs, sequence risk, and account-access rules. Use several scenarios and connect the result to a detailed retirement plan.