Coast FIRE Calculator
Determine when you can stop saving and let your investments grow to reach Financial Independence. Coast FIRE means you’ve saved enough that your investments will grow to support your retirement without additional contributions.
Your Financial Details
This is how much you’ll need to withdraw annually in retirement
Your Coast FIRE Results
Based on your withdrawal rate and annual expenses
Amount needed today to reach your retirement goal without additional contributions
You need $X more to reach Coast FIRE
Understanding Coast FIRE
Coast FIRE is a financial independence strategy where you save enough money early in life that your investments will grow to support your traditional retirement without needing to make additional contributions.
How Coast FIRE Works
With Coast FIRE, you calculate how much you need to have invested now so that by your target retirement age, your investments will have grown (through compound interest) to an amount that can support your retirement withdrawals.
Key Concepts
- Target Retirement Portfolio: Annual Expenses ÷ Safe Withdrawal Rate
- Coast FIRE Amount: Target Portfolio ÷ (1 + Annual Return Rate)^Years Until Retirement
- Compound Growth: Your money grows exponentially over time without additional contributions
Example Scenario
If you’re 30 years old, plan to retire at 60, need $40,000/year in retirement, and expect a 7% return with a 4% withdrawal rate:
- Target Portfolio: $40,000 ÷ 0.04 = $1,000,000
- Coast FIRE Amount: $1,000,000 ÷ (1.07)^30 ≈ $131,367
If you have $131,367 invested at age 30 and it grows at 7% annually, it will reach $1,000,000 by age 60 without any additional contributions.
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