FIRE Calculator
See how many years until you reach financial independence.
Your Details
How It Works
- Enter your annual living expenses.
- Enter your current savings and monthly contribution.
- Press Calculate to see your FIRE number and timeline.
Formula Used
Also known as the "25x expenses" rule, based on the 4% safe withdrawal guideline.
Good to Know
- • Lowering annual expenses reduces your FIRE number directly.
- • Savings rate matters more than income alone for reaching FIRE fast.
Important Notes
- • The 4% rule is a guideline based on historical data, not a guarantee.
- • Doesn't account for changing expenses or healthcare costs before Medicare eligibility.
Why Expenses Matter as Much as Income
The FIRE number is based entirely on annual expenses, not income — someone spending $40,000 a year needs a $1,000,000 portfolio at a 4% withdrawal rate, regardless of whether they earn $60,000 or $200,000. This is why the FIRE movement often emphasizes reducing expenses as much as increasing income: every dollar cut from annual spending lowers the target by $25.
Savings Rate Is the Real Lever
Because a higher savings rate does double duty — it grows the portfolio faster and lowers the expenses that portfolio needs to cover — small increases in how much of your income you save can dramatically compress the timeline to FIRE. This is more powerful than either a bigger income or a slightly higher investment return on its own.
Making Sense of the Terms
- FIRE number — annual expenses divided by 4%, often described as "25 times annual expenses."
- Savings rate — the single biggest lever in FIRE planning, since it both grows the portfolio and shrinks the target simultaneously.
Example Scenario: Reaching FIRE on $40,000/Year Expenses
Starting from $80,000, contributing $2,000/month at 7%: reaches $1,000,000 in ≈ 14 years
Cutting annual expenses to $32,000 instead lowers the FIRE number to $800,000 — reachable roughly 2-3 years sooner at the same contribution rate, illustrating why reducing spending often accelerates FIRE timelines faster than earning more.
Expense Level FIRE Number Table
| Annual Expenses | FIRE Number (25x) |
|---|---|
| $32,000 | $800,000 |
| $40,000 | $1,000,000 |
| $60,000 | $1,500,000 |
Watch Out For These in FIRE Planning
- Underestimating healthcare costs — a significant expense before Medicare eligibility.
- Not stress-testing against a market downturn early in retirement — sequence-of-returns risk is a real concern for early retirees.