Plan your path to financial independence
Free FIRE Calculator
Estimate how much you need to retire early, when your current plan could reach financial independence, and which assumption matters most. This free FIRE calculator works in your browser and gives you a downloadable plan without requiring an account.
How it works
A practical FIRE calculator, not just a FIRE number
Enter your baseline
Add your age, portfolio, income, spending, and annual investing using numbers that describe your plan today.
Test the assumptions
Adjust return, inflation, withdrawal rate, and retirement income to compare a conservative case with your base case.
Download the plan
Review the FIRE number, estimated age, savings rate, and Coast FIRE number, then export the scenario as CSV.
Choose your path
Explore the FIRE calculator that matches your plan
The main calculator gives you a complete baseline. Focused tools use the same transparent model for a specific planning question and next step.
coast fire calculator
Coast FIRE Calculator
Find the portfolio you need before future growth can do more of the work.
Open calculator →barista fire calculator
Barista FIRE Calculator
See how flexible part-time income can reduce your portfolio target.
Open calculator →fire number calculator
FIRE Number Calculator
Turn your annual spending gap into a clear portfolio target.
Open calculator →advanced fire calculator
Advanced FIRE Calculator
Separate taxable, traditional, Roth, and cash accounts in one plan.
Open calculator →Methodology
See what drives your FIRE estimate
A FIRE calculator is most helpful when it turns a vague retirement wish into a set of decisions you can inspect. Start with the numbers that describe your life today: age, invested savings, income, annual spending, and the amount you invest each year. Then separate what you know from what you are assuming. Your current spending may not equal future spending, and a market return is not a promise. Recording both the number and the reason behind it makes the estimate easier to review with a partner or update later.
Decision guide
How to read a FIRE calculator result
The calculation begins with a spending gap. Subtract reliable retirement income from the annual amount your future lifestyle may require, then connect that gap to a withdrawal rate. This creates the target portfolio commonly called a FIRE number. The target is useful because it makes trade-offs visible: lower spending reduces the gap, dependable income reduces the amount the portfolio must supply, and a more conservative withdrawal rate increases the margin. None of these choices is automatically right; the point is to see the consequence of each choice.
Run more than one scenario before making a major decision. A base case can use your best current estimate. A stress case can use higher healthcare or housing costs, lower real returns, slower contributions, or less retirement income. A flexibility case can add part-time work, a later retirement age, or a temporary spending reduction. When several reasonable cases point to a similar range, the result becomes a useful planning boundary. When a small input change moves the answer dramatically, that input deserves more research.
Base case
Use the spending, income, savings, return, inflation, and withdrawal assumptions that best describe your current plan.
Stress case
Test higher spending, lower real returns, slower contributions, or less retirement income to see how much margin remains.
Flexibility case
Model a later age, temporary part-time work, a lower-spending year, or a paused purchase to reveal choices you can make.
Planning checklist
Build a FIRE plan you can explain
Spending deserves more attention than a single annual total. Check housing, healthcare, insurance, taxes, transportation, travel, family support, repairs, subscriptions, and irregular purchases. Decide whether a cost will disappear, continue, or grow after full-time work ends. Treat optional income differently from income you can reasonably rely on. A plan that only works when every bonus, side job, or benefit arrives on time may need a larger cash reserve or a more flexible withdrawal approach.
- Include overlooked costs: healthcare, taxes, insurance, repairs, travel, family support, and irregular purchases.
- Check account access: taxable, traditional, Roth, and cash balances may support different withdrawal choices.
- Save your scenarios: download the result so you can compare the plan with actual progress instead of relying on memory.
- Set a review date: rerun the calculator when income, expenses, goals, or investment assumptions materially change.
What the FIRE calculator includes
- • Basic and Advanced modes for a quick estimate or account breakdown.
- • Taxable, traditional, Roth, and cash balances in Advanced mode.
- • Part-time income, pension, Social Security, or other retirement income.
- • Inflation-adjusted return assumptions and a configurable withdrawal rate.
- • A blank CSV template and a downloadable result summary.
Use the result as a planning baseline
Account location can change how a portfolio is used. Taxable investments, traditional retirement accounts, Roth accounts, and cash may have different access rules, taxes, and timing considerations. Advanced mode makes the starting balance easier to audit, but it does not calculate a personal tax strategy. Use the account breakdown to ask better questions: which assets are available in the first years, which withdrawals may create taxable income, and how much liquidity is needed before a longer-term account can be used?
Time is another major input. A longer runway gives contributions and compounding more opportunity, while a shorter runway makes the result more sensitive to savings, spending, and market returns. The projected FIRE age is therefore a scenario output, not a promise that work must end on one exact birthday. Compare the result with a target age and with a range of ages. A plan can be successful even when the date changes, if it gives you more control over the next decision.
Review the result after meaningful changes in income, expenses, savings, investments, household needs, or retirement timing. A regular review once or twice a year can replace old assumptions with actual results. Save dated CSV exports so you can see whether the target moved because of your behavior, the market, or the assumptions. Keeping the earlier version is valuable: it shows progress and prevents a new optimistic assumption from hiding a real change in risk.
Use the calculator as an educational planning record, not as a substitute for professional advice. If the decision involves taxes, insurance, estate planning, concentrated investments, debt, or a large irreversible purchase, verify the relevant rules with current official information and a qualified professional. The strongest output is not the earliest possible date. It is a scenario you understand, a margin you can explain, and a next step you can actually take.
FAQ
FIRE calculator questions
Ready to see your FIRE number?
Start with the basic calculator, then download the scenario you want to keep.