Personal FinanceFree Tool

Coast FIRE Calculator

Provided byCalculator Herocalculatorhero.net

Calculates savings required to coast to FIRE (Financial Independence, Retire Early) at retirement age. Determines how...

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About this tool

What Coast FIRE Calculator does

A Coast FIRE Calculator determines the amount you need invested today to reach your retirement goal without further contributions, letting compound growth carry you to Financial Independence. It outputs your FIRE number, Coast FIRE number, remaining savings gap, and required monthly contributions to stay on schedule. The tool is designed for users mapping out early retirement pathways who want to see whether their current savings rate is sufficient or if they can "coast" by reducing future contributions.

Step by step

How to use the Calculator Hero Coast FIRE Calculator

  1. 1

    Enter your current savings and investment balance

  2. 2

    Input your expected annual expenses in retirement

  3. 3

    Provide your current age and target retirement age

  4. 4

    Set your expected annual investment return percentage and safe withdrawal rate

  5. 5

    View the calculated FIRE number, Coast FIRE number, and monthly savings needed to coast on schedule

Is it right for you

Best for

Individuals pursuing FIRE strategies who want to reduce savings intensity in later career years by calculating whether current investments can reach retirement goals through growth alone.

Limitations

  • Ads appear on the page
  • Results are based on user-input assumptions and are not financial advice
  • No unit switching (e.g., currency or contribution frequency) beyond monthly defaults
Questions

Coast FIRE Calculator FAQ

What is the difference between the FIRE number and Coast FIRE number?
The FIRE number is the total portfolio balance needed to fund retirement expenses forever based on your safe withdrawal rate. The Coast FIRE number is the present value of that FIRE number — the amount you must have invested today so compound growth alone will reach that target by your chosen retirement age without additional contributions.
Can I use this calculator if I plan to make regular contributions after the coast point?
Yes. The calculator also shows the monthly contribution required to reach your FIRE number by retirement age if you do not reach the Coast FIRE number with current savings alone.
How does the safe withdrawal rate affect my Coast FIRE number?
A lower safe withdrawal rate increases the target portfolio size needed to sustain your expenses, which raises both the FIRE number and the Coast FIRE number required to retire early.
Is there a way to save or share my inputs for later comparison?
The calculator includes a share button that allows you to bookmark your exact inputs and results for future reference or comparison.
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