Tool-22 // FIRE Number Calculator
Calculate your FIRE (Financial Independence, Retire Early) number — the amount you need invested to live off your investments forever.
What you expect to spend each year after retiring.
The 4% rule is the standard starting point.
What you have invested right now.
How much you save and invest each year going forward.
Long-term market average is ~7% after inflation.
You're 8.0% of the way to FIRE. Target: $1,250,000.
Educational estimates only — not personalized financial advice. Calculator inputs stay on your device. Disclaimer · Privacy
// How to use this instrument
Plain-English guide for FIRE Number Calculator. Read alongside your results — then re-run scenarios.
“FIRE” stands for Financial Independence, Retire Early. People use the idea in different ways:
- Financial independence — investment assets that could support your spending without needing a full-time paycheck - Retire early — optional; many people want FI for flexibility, not a permanent exit from all work
1. Your FIRE number — a rough portfolio target 2. A simple years-to-target estimate — if you keep saving and markets roughly match the return you assume
FIRE number ≈ Annual spending ÷ Safe withdrawal rate
Example: if you need $40,000 per year from the portfolio and you use a 4% withdrawal rate:
- Translate a lifestyle budget into a ballpark invested-asset target - See how spending changes the target more than small return tweaks - Compare “save more” vs “spend less” on the timeline - Stress-test optimistic vs cautious withdrawal rates (for example 3.5% vs 4%)
Use something more detailed (and often a professional) when you are:
- Within a few years of leaving full-time work - Relying on pensions, rental income, equity comp, or complex taxes - Funding early retirement before public benefits or workplace coverage apply - Holding mostly a single stock, private business, or illiquid real estate
How to use it: Annual spend → SWR % (e.g. 3.5–4%) → current invested → annual save → return.
Label units carefully (monthly vs annual income, APR vs monthly rate).
After the first run, stress-test: higher rate, lower return, shorter timeline, or higher expenses. The range matters more than one precise output.
How to read results: FI number + timeline sensitivity to spend and return.
If a result looks surprising, re-check units, whether taxes/fees are included, and whether you modeled best-case assumptions only.
Use related guides and tools below to cross-check the story from another angle.
Educational estimates only — not personalized financial advice. Results depend on your inputs. Disclaimer · Privacy · Terms.
Take your annual expenses and divide by your safe withdrawal rate (typically 4%). If you spend $50,000/year, you need $1,250,000 invested. That's it — the formula is simple. The discipline to get there is the hard part.
Someone earning $60,000 and saving 50% reaches FIRE faster than someone earning $200,000 and saving 10%. Your savings rate — not your salary — determines your timeline to financial independence.
Most people pursuing FIRE don't plan to stop working entirely. They want the freedom to choose work they care about, take risks, or spend more time with family — without the anxiety of needing a paycheck. The 'RE' is optional.
Want to understand the concepts behind these numbers?
Cookies & ads. Calculators run in your browser — we don’t store your inputs. Google AdSense may use cookies for ads and measurement. Privacy Policy. In the EEA/UK a separate Google consent prompt may also appear.