Explore When Your Savings Could
Reach Your Retirement Target
Model a Coast FIRE scenario with your savings, timeline, and assumptions. See the estimate, change the inputs, and understand the math without a spreadsheet.
Your Coast FIRE Number
$328,450
Illustrative result: this example has covered 56% of its Coast target at the selected assumptions.
Transparent model
Change every assumption
How Coast FIRE Works
Three steps to explore a retirement scenario. No complex spreadsheet required.
Enter Your Numbers
Add current savings, age, and retirement goals as inputs to the scenario.
Review the Projection
See when the selected inputs and assumptions reach the target—not a guaranteed retirement date.
Compare Scenarios
Change returns, spending, retirement age, or withdrawal rate and see how the estimate responds.
Use the Result as a Scenario, Not a Promise
A projection is useful when its inputs, assumptions, and limitations are visible.
Inputs
Start with your numbers
Use current balances and spending estimates, then revisit them when your circumstances change.
Assumptions
Test more than one case
Returns, inflation, and withdrawal rates are uncertain. Compare conservative and optimistic inputs instead of relying on one result.
Verification
Check before acting
The tools are educational estimates. Confirm taxes, benefits, investment choices, and major life decisions with qualified professionals.
How to Evaluate These Calculations
Published Methodology
See the formulas, units, and assumptions behind the projection instead of relying on a black-box score.
Scenario Controls
Adjust return, inflation, spending, timeline, and withdrawal assumptions to understand what drives the result.
Transparent
Results are estimates, not forecasts or individualized recommendations. Important decisions deserve independent verification.
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Understand the Model Before You Act
Learn what the calculator includes, what it leaves out, and how to interpret a Coast FIRE estimate.
Methodology & Assumptions
Review the formulas and conventions used by the calculators, including the difference between nominal and real values.
Review Methodology →FIRE Education Library
Build context around Coast FIRE, withdrawal rates, taxes, healthcare, and other variables a simple projection cannot settle.
Browse Articles →Start With a Scenario You Can Inspect
Run the free calculator, change the assumptions, and compare the outcome. No signup is required. Free calculator inputs remain in your browser unless you explicitly ask us to email your results.
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