FIRE Calculator – FinancialAha
A FIRE calculator is a tool used to estimate when you can achieve financial independence and retire early under the FIRE movement.
What it does
It helps you figure out:
- How much money you need to retire
- How long it will take to get there
- How your savings rate affects your timeline
What you usually input
A typical FIRE calculator asks for:
- Your current savings
- Monthly or yearly income
- Savings rate (how much you invest)
- Expected investment returns (e.g., 5–7%)
- Desired annual spending in retirement
How it works (simple idea)
It uses a rule of thumb called the 4% rule, which says:
- You can safely withdraw about 4% of your investments per year
- So you need roughly 25× your annual expenses
👉 Example:
- If you want $40,000/year in retirement
- You’ll need about $1,000,000 invested
Why people use it
A FIRE calculator helps you:
- See if early retirement is realistic
- Adjust your savings or lifestyle
- Plan long-term financial goals
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