Use our free FIRE calculator to find your FIRE number and see exactly how many years until you can retire early. Just enter your annual spending, current savings, monthly contributions, and expected return. In seconds, you will know your FIRE number, your retirement age, and your monthly passive income at FIRE. Financial independence has never been easier to plan.
🔥 FIRE Calculator
Your FIRE Results
Results are estimates based on consistent returns. Real markets fluctuate.
What Is FIRE?
FIRE stands for Financial Independence, Retire Early. It is a movement built on one big idea: save and invest enough money so that your investments pay for your life. Then you do not need a job anymore. You are free.
Here is how it works. You save a big chunk of your income every month. You invest that money in things like index funds or dividend stocks. Over time, your money grows. At some point, your investment account is big enough that you can live off the gains. That is financial independence.
The "Retire Early" part means you can stop working long before age 65. Some people reach FIRE in their 30s or 40s. Others aim for their 50s. The timeline depends on how much you save and how much you spend.
You do not have to stop working forever. Many FIRE followers keep doing work they love. The difference is that they choose to work. They do not have to. That freedom changes everything.
How to Use This FIRE Calculator
Using the FIRE calculator above is simple. Follow these steps:
- Annual Spending: Enter how much you plan to spend each year in retirement. Be honest. Include housing, food, travel, and fun.
- Current Savings: Enter how much money you have saved or invested right now.
- Monthly Contribution: Enter how much you add to investments each month.
- Expected Annual Return: This is how much you expect your investments to grow each year. A common estimate is 7% for a diversified stock portfolio.
- Safe Withdrawal Rate: This is the percentage you will pull from your portfolio each year. The classic number is 4%.
- Your Current Age: Enter your age so the calculator can show your projected retirement age.
Hit the button and see your FIRE number, years to FIRE, and retirement age appear instantly. You can change any number and recalculate as many times as you want.
What Is a Safe Withdrawal Rate?
The safe withdrawal rate (SWR) is the percentage of your portfolio you can spend each year without running out of money. The most well-known SWR is 4%, which comes from the 4% rule, popularized by the Trinity Study.
The Trinity Study looked at historical stock market data going back decades. It found that if you withdraw 4% of your portfolio in year one, and adjust for inflation each year after, your money would last 30 years in almost all historical periods.
Here is a simple example. If your FIRE number is $1,000,000 and you use a 4% SWR, you can spend $40,000 per year. Your investments keep growing in the background. In many cases, you end up with more money than you started with after 30 years.
Some people use a lower SWR like 3% or 3.5% to be extra safe. A lower SWR means you need a bigger portfolio. Other people use 5% if they plan to earn some income in retirement. The FIRE calculator lets you test any rate you want.
FIRE vs Lean FIRE vs Fat FIRE
Not all FIRE is the same. There are three main flavors, and they come down to how much you spend in retirement:
Lean FIRE is for people who are happy with a simple, frugal life. You use a 5% withdrawal rate, which means you need less money saved. The trade-off is a tighter budget. Think cooking at home, fewer vacations, and a smaller home. If you can live on $30,000 a year, your Lean FIRE number is just $600,000.
FIRE (standard) is the middle ground. It uses a 4% withdrawal rate. Most people use this as the starting point. It gives you a comfortable life without being too tight or too lavish.
Fat FIRE is for people who want to live big in retirement. You use a 3% withdrawal rate, which means you need to save more. But you get more freedom to spend on travel, dining out, hobbies, and luxury. If you want to spend $100,000 a year, your Fat FIRE number is $3.3 million.
The FIRE calculator shows all three numbers side by side so you can see the full picture and pick the lifestyle that fits your goals.
More Free Tools
If you liked this FIRE calculator, check out these other free tools:
- Coast FIRE Calculator: Find the amount you need invested today so you never have to contribute again.
- DCA Calculator: Model how consistent investing grows your portfolio over time.
- Mortgage vs. Invest Calculator: See whether paying off your mortgage early or investing wins long-term.
Frequently Asked Questions
Your FIRE number is the total amount of money you need invested to retire. The formula is simple: divide your annual spending by your safe withdrawal rate. If you spend $40,000 a year and use a 4% withdrawal rate, your FIRE number is $1,000,000. The idea is that 4% of $1,000,000 equals $40,000 per year, which covers all your expenses.
The 4% rule comes from the Trinity Study, which found that a 4% withdrawal rate kept portfolios intact across most 30-year periods in history. It is a good starting point. But some FIRE planners prefer 3% or 3.5% for extra safety, especially if they plan to retire very early and need their money to last 40 or 50 years. The calculator lets you test any rate.
Most FIRE planners use 7% as a real return estimate for a diversified index fund portfolio. This accounts for long-term stock market growth after inflation. If you want to be more conservative, use 5% or 6%. If your portfolio includes bonds or other lower-growth assets, lower the number. The calculator lets you test any return.
The two biggest levers are your savings rate and your expenses. The more you save each month, the faster you reach FIRE. The less you spend in retirement, the smaller your FIRE number. Increasing income helps too. Many FIRE followers cut big expenses like housing and cars, invest the difference, and reach FIRE years earlier than they expected.
Lean FIRE uses a 5% withdrawal rate and assumes a frugal lifestyle with lower expenses. Standard FIRE uses 4% and represents the middle path. Fat FIRE uses 3% and requires a larger portfolio, but gives you more spending freedom in retirement. The FIRE calculator shows all three numbers at once so you can compare them.
The calculator uses the return rate you enter as a nominal rate. If you use 7% as your expected return and inflation is around 2-3%, your real return is closer to 4-5%. For a conservative estimate, enter a real return (after inflation). The safe withdrawal rate already assumes annual inflation adjustments based on the Trinity Study research.
Start Planning Your FIRE Today
The FIRE calculator above gives you a clear, personalized target: your FIRE number, your savings gap, and roughly how many years you have left to reach financial independence. Whether you are aiming for lean FIRE or a comfortable early retirement, knowing your number is the first step. Try the FIRE calculator with your own income and expenses to see where you stand today.
Once you know your FIRE number, the next question is how to get there faster. One powerful strategy is consistent, automated investing. Check out our Coast FIRE Calculator to find out how much you need invested today so that compound growth can carry you to retirement on its own.