Enter your after-tax income, annual expenses, current invested assets, and expected return to see exactly how many years until work becomes optional — with three paths: Traditional, Coast, and Barista FIRE.
Forget the gold watch at 65. The day work becomes optional has nothing to do with your age and everything to do with one number: the portfolio size at which your investments throw off enough return to cover your life, forever, without you lifting a finger. Hit that number at 41 and you are done at 41. The FIRE Calculator finds it for your exact situation, shows how many years away it is at your current savings rate, and compares three distinct paths: traditional FIRE (full independence), Coast FIRE (stop saving and let compounding finish the job), and Barista FIRE (part-time income covers the gap while the portfolio grows).
The key inputs are Annual Income (after tax), Annual Expenses (everything you spend in a year), Current Invested Assets (401k, IRA, and brokerage combined — not home equity), Expected Annual Return, and Withdrawal Rate. The 4% rule — withdrawing 4% of the portfolio annually — is the standard starting point, but the tool lets you test 3%, 3.5%, or any rate you prefer to stress-test the projection.
How your FIRE number is calculated and what drives it
Your FIRE Number is 25 times your annual expenses — the portfolio size that, at a 4% annual withdrawal rate, generates enough income to cover your spending indefinitely. If you spend $60,000 per year, your FIRE Number is $1,500,000. If you can cut expenses to $48,000, the target drops to $1,200,000 — a $300,000 difference in the mountain to climb.
This is the most important insight the calculator delivers: expense level drives the FIRE Number more powerfully than income does. A high earner spending $120,000 per year needs $3,000,000. A moderate earner spending $40,000 per year needs $1,000,000. Income gets you to the target faster (via savings rate), but the size of the target is set by expenses. The tool makes this relationship explicit by showing the FIRE Number alongside years to reach it.
The Expected Annual Return input defaults to a commonly used 7% real return assumption (nominal stock market returns around 10%, minus historical average inflation around 3%). You can change this to be more conservative — 5% or 6% — to see how a lower-return environment affects your timeline. A two-point difference in expected return changes the FIRE date by several years on a long horizon.
Savings rate is the most powerful variable — and the one you control
The Savings Rate vs Years to FIRE tab is the most strategic view in the calculator. It plots your timeline at every savings rate from 10% to 60% or higher, showing how many years each rate requires. The shape of this curve is non-linear: going from 10% to 20% savings rate cuts more years off than going from 40% to 50% because the base case is so slow.
At a 10% savings rate on $80,000 after-tax income, you save $8,000 per year. Your expenses are $72,000, and your FIRE Number is $1,800,000. With $50,000 already invested, you reach FIRE in approximately 47 years. Raise the savings rate to 30% — saving $24,000 per year while living on $56,000 — and the timeline drops to roughly 28 years. At 50% savings rate ($40,000/year saved), the timeline compresses to around 17 years from a $50,000 starting point.
The takeaway from this analysis is practical: optimizing your savings rate in the 20–40% range produces dramatic timeline compression. Going from 20% to 40% savings rate usually cuts the timeline roughly in half because you are simultaneously saving more and needing a smaller portfolio (since your lower expenses mean a lower FIRE Number).
Coast FIRE: stop saving, let compounding do the rest
Coast FIRE is the point where your current invested portfolio — even if you stop all contributions today — will grow to your full FIRE Number by a conventional retirement age of 65. You have 'coasted' past the hard part; compounding handles the rest. The calculator shows your Coast FIRE target alongside your current portfolio.
For a 35-year-old with 30 years until age 65 and an expected 7% real return, the Coast target is their FIRE Number divided by the compounding factor over 30 years. A $1,500,000 FIRE Number requires roughly $197,000 in invested assets today to coast to FIRE by 65 at 7% returns — because $197,000 compounding at 7% for 30 years grows to about $1,500,000. If you already have $197,000 invested, you have already hit Coast FIRE.
The dashboard displays Coast FIRE as either 'Already there!' or as the portfolio target you still need to reach. Once you hit Coast FIRE, you gain significant optionality: you can stop investing, work part-time, shift to a lower-paying role you enjoy more, or simply maintain a less intense savings pace.
Barista FIRE: part-time work fills the income gap
Barista FIRE sits between full FIRE and Coast FIRE. The premise is that you accumulate a portfolio that, combined with a modest part-time income — often used as 'barista' work though any low-stress income counts — covers your full annual expenses. The portfolio does not need to be large enough to sustain 4% withdrawals alone.
If your annual expenses are $55,000 and you can earn $20,000/year from part-time work, your portfolio only needs to generate $35,000 per year. At a 4% withdrawal rate, that requires $875,000 in invested assets — significantly less than the $1,375,000 needed for full FIRE. The Barista FIRE target in the calculator shows this reduced number and how many years sooner you can reach it compared to full FIRE.
For many people, Barista FIRE is the practical middle path. Full FIRE at 40 requires exceptional savings discipline. Coast FIRE at 40 still means another 25 years until access to the full portfolio. Barista FIRE at 45 — working 15–20 hours per week doing something low-stress while a large but not maximal portfolio compounds — is the path many people find most liveable.
Year-by-year milestones and how to use them
The milestones table shows your projected portfolio balance at every year from now until FIRE. This is not just a motivational tool — it is a planning tool. Milestones at 25%, 50%, 75%, and 100% of your FIRE Number mark meaningful checkpoints. Reaching 25% of FIRE means compounding is doing real work in your portfolio. Reaching 50% means you are more than halfway there in the math, but often less than halfway there in years because the second half benefits from a larger compounding base.
The chart also shows the acceleration effect: portfolio growth in the early years is mostly contributions. In the later years, investment returns generate more than contributions do. The visual inflection point — where the curve steepens — is roughly at the halfway mark of the portfolio target and is often a revelation for people who feel like they are making slow progress.
Treat this as a second opinion before your next big financial decision — whether to change jobs for more income, cut a major expense, or move to a lower cost-of-living area. Those decisions are worth stress-testing against the FIRE timeline before you commit them. This is the fastest way to stop procrastinating on the math.
How to use it
- Enter Annual Income (after-tax take-home) and Annual Expenses (your actual total annual spending across all categories).
- Add Current Invested Assets — the combined total of 401k, IRA, Roth IRA, and taxable brokerage accounts only (not home equity or cash).
- Set Expected Annual Return (%) — 7% is a common baseline for a diversified stock portfolio; use 5–6% for a more conservative projection.
- Adjust the Withdrawal Rate (%) — 4% is the standard starting point; lower rates require larger portfolios but provide more safety margin.
- Read Years to FIRE, your FIRE Number, your Coast FIRE target, and the 4% Safe Withdrawal annual income — then use the Savings Rate vs Years tab to find your optimal contribution level.
Who it's for
- 30-year-old with $85,000 invested evaluating whether they have hit Coast FIRE — Discovers their Coast FIRE target is $112,000 at a 7% return over 35 years to age 65 — just $27,000 away — which changes their approach to contributions immediately.
- Couple considering moving to a lower cost-of-living city — Reduces annual expenses by $18,000 in the tool and sees the FIRE Number drop by $450,000 and their timeline shorten by 9 years — the quantified value of the move.
- High-income earner at 45% savings rate checking their FIRE date — Sees a 14-year timeline from $120,000 invested, then uses the Barista FIRE comparison to see they could be semi-retired in 9 years if willing to earn $18,000/year part-time.
- New investor wanting to understand the power of starting early — Compares FIRE timeline starting at age 25 vs. 35 with the same savings rate and sees the 10-year difference translates to a 12-year later FIRE date — the real cost of waiting a decade to start.
Key terms
- FIRE number
- The portfolio size required to sustain indefinite withdrawals at your chosen withdrawal rate. At 4% withdrawal, it equals 25 times your annual expenses.
- Coast FIRE
- The portfolio size at which you can stop contributing and still reach your full FIRE number by conventional retirement age through compounding alone.
- Barista FIRE
- A semi-retirement state where a smaller portfolio plus a modest part-time income together cover annual expenses. Requires less capital than full FIRE.
- 4% rule
- The widely used guideline that withdrawing 4% of a diversified portfolio annually is historically sustainable over a 30-year retirement. Often adjusted to 3–3.5% for longer horizons.
- Savings rate
- Annual savings divided by annual after-tax income. The single variable most correlated with time to financial independence — more important than income level alone.
Frequently asked questions
Should I include home equity in Current Invested Assets?
No. Home equity is not a liquid investable asset that generates returns for withdrawal in the FIRE model. Enter only accounts you can draw on: 401k, IRA, Roth IRA, taxable brokerage, and similar investment accounts. Your home equity may be part of your overall net worth but does not count toward the FIRE Number for this calculation.
What if I plan to have Social Security income in retirement?
Social Security income reduces the withdrawal burden on your portfolio. If you expect $15,000/year in Social Security benefits, subtract that from Annual Expenses before entering it in the tool — your portfolio only needs to cover the gap. This is especially relevant for anyone who expects to access Social Security before or alongside their FIRE portfolio.
Is the 4% rule still reliable for early retirees in 2026?
The 4% rule was developed based on 30-year retirement periods. For someone retiring at 40 with a 50-year horizon, a 3–3.5% withdrawal rate provides better historical safety margins. The tool lets you set any withdrawal rate — try 3.5% and see how the FIRE Number changes. Many early retirees in the FIRE community now use 3–3.5% as their baseline.
Does the calculator account for taxes on 401k withdrawals?
No — it uses gross returns and gross withdrawal rates. Your actual after-tax withdrawal will depend on your account mix (Roth vs. traditional), tax bracket in retirement, and state taxes. Factor in estimated taxes when deciding your target withdrawal rate by using a slightly lower rate than the pre-tax calculation suggests.
My savings rate is 8% and my FIRE date is 55 years away — what should I do?
Use the Savings Rate vs Years tab and find the rate that gets you to a timeline you can live with. Often a 10-percentage-point increase in savings rate makes a 15-year difference. The fastest path is usually some combination of increasing income and reducing fixed expenses — the tool will show you exactly how much each matters. The timeline is sensitive to savings rate; even moving from 8% to 15% makes a substantial difference.