Coast FIRE Calculator
The Coast FIRE Calculator from Freedom Calcs helps you determine when you can stop saving for retirement and let your investments grow to your retirement target. It's designed for anyone pursuing financial independence, particularly those interested in the Coast FIRE strategy.
Key Features
- Personalized Estimates: Input your current age, retirement age, invested assets, annual retirement spending, and monthly contributions to get your Coast FIRE target and age.
- Spending Estimator: Get a starting budget based on metro area data (Census ACS rents and BLS spending) or enter your own.
- Adjustable Assumptions: Customize nominal return, inflation, and withdrawal rate to see how changes affect your plan.
- Visual Projections: View a chart and table showing your portfolio growth over time, comparing "keep contributing" vs. "stop now" scenarios.
- Contribution Scenarios: Compare different monthly contribution amounts and see their impact on your Coast milestone and retirement assets.
- Return Sensitivity: Explore how lower or higher returns affect your Coast target and retirement assets.
- Educational Content: Learn what Coast FIRE is, how the calculator works, and the differences between Coast FIRE and other FIRE variants.
- Privacy-Focused: All calculations happen in your browser; no financial data is uploaded or saved.
How It Works
- Set a Retirement Target: Divide your annual portfolio-funded spending by your withdrawal rate.
- Account for Purchasing Power: Convert nominal return and inflation to a real return.
- Work Backward: Discount the retirement target to today using the real return and years to retirement.
The calculator then finds the first month your assets meet the changing Coast threshold, given your contributions.
Use Cases
- Early Retirement Planning: Determine if you've saved enough to "coast" to retirement without further contributions.
- Savings Strategy Comparison: See how different contribution levels affect your Coast FIRE age.
- Assumption Testing: Understand the impact of return rates, inflation, and withdrawal rates on your target.
- Budget Planning: Use the spending estimator to set a realistic retirement budget.
Limitations
- Assumes constant returns and excludes market volatility, taxes, fees, and post-retirement withdrawals.
- Not financial advice; for educational purposes only.
Start planning your Coast FIRE journey today with this free, no-signup calculator.

