Coast FIRE Calculator
You have reached Coast FIRE. Your current portfolio can grow to your FIRE number by age 50 without further contributions.
You have reached Coast FIRE. Your current portfolio can grow to your FIRE number by age 50 without further contributions.
Coast FIRE Calculator
The Coast FIRE Calculator helps you estimate how much you need to achieve financial independence and whether you are already on a Coast FIRE path. Enter your age, portfolio, savings rate, expenses, and expected returns to see your FIRE number, Coast FIRE target, and projected timeline.
Use it to plan early retirement, semi-retirement, or a lower-pressure career phase where your investments do more of the heavy lifting. It is especially useful when you want to know whether you can ease off aggressive saving without giving up your long-term retirement plan.
What is FIRE?
FIRE (Financial Independence, Retire Early) is a strategy focused on saving and investing aggressively so that portfolio withdrawals can cover living costs. Once you reach your FIRE number, traditional full-time work becomes optional.
People chase FIRE for different reasons—more family time, location freedom, entrepreneurship, or simply reducing financial stress.
Common FIRE styles include:
- Lean FIRE – independence with a frugal expense base
- Regular FIRE – covering a typical middle-class lifestyle
- Fat FIRE – a larger corpus for a more comfortable lifestyle
- Coast FIRE – enough invested now that growth can finish the job by retirement age
What is Coast FIRE?
Coast FIRE is reached when your current investments are large enough that, even if you stop contributing, expected compounding can grow the portfolio to your full FIRE number by your target retirement age.
After Coast FIRE, many people choose meaningful lower-paying work, take career breaks, or save less aggressively while still covering current living expenses from income.
What is a Coast FIRE Calculator?
This free calculator estimates your FIRE number using annual expenses and a safe withdrawal rate. It also calculates your Coast FIRE target, years to FIRE at your current contribution rate, projected corpus at retirement, and the monthly saving needed to hit FIRE by your chosen age.
It turns complex compounding math into a clear progress snapshot so you can adjust savings, expenses, or timeline with confidence.
How Can a Coast FIRE Calculator Help You?
Financial independence planning can feel overwhelming when the final target is many years away. A Coast FIRE Calculator breaks the journey into milestones so you can make smarter career and savings decisions today.
- FIRE number clarity – Know the corpus needed to cover annual expenses using your chosen withdrawal rate.
- Early milestone tracking – See whether you have already reached Coast FIRE and can reduce saving pressure.
- Timeline projection – Estimate years to full FIRE at your current contribution rate.
- Contribution guidance – Find the monthly saving needed to retire by your target age.
- Scenario comparison – Test different expenses, returns, and retirement ages before changing your plan.
How to Use the Coast FIRE Calculator?
- Enter your Current Age and Target Retirement Age.
- Add your Current Portfolio value across investable assets.
- Fill in your Monthly Contribution and Annual Expenses.
- Choose an Expected Return Rate and Safe Withdrawal Rate.
- Review FIRE number, Coast FIRE number, years to FIRE, and monthly amount needed.
Why Track Both FIRE and Coast FIRE?
Full FIRE can take many years. Coast FIRE is an earlier milestone that shows when your future retirement is largely secured by compounding. Tracking both helps you stay motivated and make smarter career decisions along the way.
If Coast FIRE is close, you may choose flexibility sooner. If full FIRE is near, you can fine-tune withdrawal planning and risk management.
Benefits of Coast FIRE Calculator
- Clear independence target – Know your exact FIRE number based on expenses and withdrawal rate.
- Coast FIRE checkpoint – See whether compound growth alone can finish your plan.
- Timeline visibility – Estimate years to FIRE with your current savings rate.
- Contribution guidance – Find the monthly saving needed to retire by your target age.
- Scenario planning – Compare different returns, expenses, and retirement ages instantly.
- Free and fast – Adjust inputs anytime and get updated results in seconds.
How are FIRE and Coast FIRE Calculated?
The FIRE number is based on the safe withdrawal approach:
Where:
- E = Annual expenses in retirement
- SWR = Safe withdrawal rate (as a decimal)
- r = Expected annual return rate
- t = Years until target retirement age
Years to FIRE are estimated by projecting your current portfolio with monthly contributions until the balance reaches the FIRE number.
If your current portfolio is already above the Coast FIRE value, you are Coast FIRE. If it is above the full FIRE number, you have reached financial independence under the assumptions entered.
FIRE vs Coast FIRE – Which Milestone Fits You?
| Feature | Full FIRE | Coast FIRE |
|---|---|---|
| Goal | Portfolio large enough to cover expenses now | Enough invested today so growth can reach FIRE by retirement age |
| Contributions | Usually requires ongoing saving until the target is hit | No further contributions needed once Coast FIRE is reached |
| Work flexibility | Work becomes fully optional immediately | You still work to cover current expenses, but retirement is largely secured |
| Best for | People ready to stop working or retire early soon | People who want career flexibility before full retirement |