Lean Lifestyle
$3,000 / month
You need $900,000
Save per month $543
Years to reach FI 17 years
Retire by age 39
How much would you
like every month?
Let's figure out how long it takes to reach financial freedom.
Here's what it could look like
Results are based on 25× your annual income rule and 7% average annual return.
Comfortable Lifestyle
$5,000 / month
You need $1,500,000
Save per month $905
Years to reach FI 19 years
Retire by age 41
Dream Lifestyle
$10,000 / month
You need $3,000,000
Save per month $1,810
Years to reach FI 22 years
Retire by age 44
Want to get more specific? Use our advanced inputs to enter your own numbers. MANUAL INPUT →
This calculator is for educational purposes only. Results are estimates and not financial advice.
How this FIRE calculator works
This tool uses the 25x rule: multiply your desired annual spending by 25 to estimate the nest egg you need to retire on. It then back-solves for the monthly savings required to reach that target by a given age, assuming your chosen real annual return.
How to use it
- Pick the monthly income you want in retirement.
- Set your current age and your desired retirement age — the FIRE target.
- Open Manual Input to add starting savings or change the expected return.
- Compare the Lean, Comfortable, and Dream lifestyle scenarios to see how spending changes the timeline.
Frequently asked questions
What is the FIRE movement?
FIRE stands for Financial Independence, Retire Early. The idea is to save and invest a high percentage of income so that investment returns can cover living expenses long before traditional retirement age.
What is the 25x rule?
The 25x rule estimates the nest egg you need by multiplying your desired annual spending by 25. It is the inverse of the 4% safe withdrawal rate that comes from the Trinity Study.
What is the 4% rule?
The 4% rule suggests withdrawing 4% of your portfolio in the first year of retirement and adjusting that amount for inflation each year afterward. It is a planning rule of thumb, not a guarantee.
What return should I assume?
A common planning assumption is 6–7% real annual return on a diversified equity-heavy portfolio. Conservative plans use 4–5%. Returns vary widely year to year and the past does not predict the future.
Lean FIRE vs Fat FIRE — what's the difference?
Lean FIRE targets a minimal-spending lifestyle, often under $40k/year. Fat FIRE targets a comfortable or affluent lifestyle, often $100k/year or more. Coast FIRE means saving enough early that compounding alone reaches your number.
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How to use the FIRE Retirement Calculator
Calculate your FIRE number — the savings target needed to retire early; estimate years to financial independence based on income, expenses, and savings rate; model different retirement spending levels.
Example workflow
Enter your annual income, current savings, monthly expenses, and expected investment return. The calculator estimates your FIRE number and how many years until you reach financial independence at your current savings rate.
Common search topics
- financial independence
- early retirement planning
- savings rate calculator
- FIRE number
Frequently asked questions
What is the FIRE number?
Your FIRE number is the total savings or invested assets needed to cover living expenses indefinitely without employment income. The most common rule of thumb is 25× your annual expenses, based on a 4% safe withdrawal rate.
What is the 4% rule?
The 4% rule suggests that withdrawing 4% of your investment portfolio per year has historically been sustainable for a 30-year retirement. For early retirees with longer time horizons, some planners use 3–3.5% to add a margin of safety.
Does savings rate matter more than income?
Yes. A higher savings rate shortens the path to financial independence far more than a higher income alone. Someone saving 50% of income can reach FI in roughly 17 years, regardless of absolute income level.
Does this calculator account for investment returns and inflation?
The calculator uses the return rate you enter. For a conservative real (inflation-adjusted) return, enter a rate of 4–6% rather than a nominal 7–10%.
Should I consult a financial advisor before acting on this estimate?
Yes. FIRE planning involves tax strategy, asset allocation, healthcare costs, and sequence-of-returns risk. A fee-only financial planner can model your specific situation accurately.
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People also ask
What savings rate do I need to retire in 10 years?
To reach financial independence in roughly 10 years, you need to save approximately 66% of your income. At 50% savings rate, it takes about 17 years; at 75%, about 7 years. The math is driven almost entirely by savings rate — income level matters less than the gap between what you earn and what you spend.
How do I account for healthcare before Medicare at 65?
Healthcare is one of the largest FIRE wildcards. Early retirees typically use ACA marketplace plans, which can run $500–$1,500/month for a family depending on income and state. Some FIRE planners deliberately keep income low enough to qualify for substantial ACA subsidies. Budget this explicitly — it is often larger than any other single expense category.
What is sequence-of-returns risk and how do I handle it?
Sequence-of-returns risk is the danger of a large market downturn in your early retirement years, which forces you to sell assets at depressed prices before they recover. Common mitigations include holding 1–3 years of expenses in cash or short-term bonds, using a flexible withdrawal rate that drops during downturns, and maintaining a small amount of income-generating activity in early retirement.
Real-world scenarios
Lean FIRE vs Fat FIRE: running both numbers
Run the calculator twice — once with a minimal annual expense budget (Lean FIRE, e.g. $40,000/year) and once with your full current lifestyle cost (Fat FIRE, e.g. $100,000/year). The FIRE number difference is dramatic: $1M vs $2.5M. Knowing both gives you flexibility — you can hit Lean FIRE sooner and choose when to keep working versus stop.
The impact of a one-time inheritance or windfall
If you receive a lump sum — inheritance, bonus, home sale proceeds — enter your current savings plus the windfall as the starting balance. A $200,000 head start at a 7% real return shaves 3–5 years off most FIRE timelines at typical savings rates. The compounding effect of front-loading is significant.
Barista FIRE: modeling partial income in early retirement
Enter an annual expense figure that is reduced by expected part-time income. If your full expenses are $60,000 but you plan to earn $20,000 from part-time work, enter $40,000 as your annual need. This dramatically reduces your required FIRE number and is a common middle path for people who want more time but aren't ready to stop working entirely.