Who pays for health insurance for the 15 years before Medicare?
At roughly $12,000/yr before ACA subsidies, that is about $180,000 of spending your plan currently excludes (healthcare input is $0).
Budget the pre-Medicare bridge →FIRE Number Calculator
Your FIRE number is the portfolio that lets you live off withdrawals indefinitely. At a 4% safe withdrawal rate it equals your annual spending times 25. Enter your spending and withdrawal rate to see the exact target and the age you reach it.
Start from a scenario
Your numbers
Essentials
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$
$
Advanced assumptions
After-tax value assumptions15% on gains
%
Planning estimate, not a tax bracket calculation
%
Applied only to gains above cost basis
$
Contributions already taxed; gains above this may be taxable
Market assumptions7% return · 3% inflation · 4% withdrawal
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Healthcare & part-time income (optional)
$
Optional — ACA estimate ~$12,000/yr before subsidies
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Optional — semi-retirement income per year
Your result
Your FIRE number
$1,500,000
To retire on $60,000 a year at a 4% withdrawal rate you need $1,500,000 invested (today's dollars) — that is your spending times 25. On your current plan you reach it around age 76 — 26 years after your target age of 50.
$60,000/yr spending · 4% withdrawal rate · 7% return · 3% inflation · 20-year runway.
Projected path to FIRE
At your current pace, you’re projected to reach FIRE around age 76 — about 26 years after your target age of 50. At age 50, you’re projected to be about $1,016,602 short. Shown in today's dollars.
FIRE vs Coast FIRE vs Barista FIRE
Three milestones on the path to financial independence, for your inputs.
Full FIRE
$1,500,000
Today's dollars
Portfolio that funds $60,000/yr at a 4% withdrawal rate — work becomes optional.
Coast FIRE
$700,100
After-tax amount needed today
After-tax amount invested today that grows into your FIRE number by age 50 with no more contributions.
Barista FIRE
Add part-time income
Enter expected semi-retirement income in the calculator to see how part-time work lowers the portfolio you need.
Gross vs spendable (future dollars at age 50): projected gross portfolio is $954,789; estimated after-tax spendable value is $873,070. The FIRE date uses spendable value.
Not sure which path fits you? Read the full comparison: Regular vs Coast vs Barista FIRE.
Assumptions:Return 7% nominalInflation 3%Withdrawal rate 4%Monthly contributions, end-of-monthToday's dollars
Educational estimate only — each chip opens the formula and source behind it. What this model does not know.
Based on your inputs
Saving more is your biggest lever
Of the inputs you control, adding $500/mo to your contributions moves your FIRE date the most — about 6 years earlier, under these assumptions.
See every lever side by side →What changes your FIRE date
Each row tweaks one lever from your plan so you can see which moves the needle most.
| Scenario | FIRE number | Years to FIRE | FIRE age |
|---|---|---|---|
| Your plan | $1,500,000 | 46 yrs | 76 |
| +$500/mo contributions | $1,500,000 | 40 yrs | 70 |
| Spend $10k/yr less | $1,250,000 | 42 yrs | 72 |
| 1% lower return | $1,500,000 | 57 yrs | 87 |
| 3.5% withdrawal rate | $1,714,286 | 50 yrs | 80 |
Based on your inputs
What to check next
Questions your current numbers raise — each with the figure that makes it worth asking. Educational estimates under this page's assumptions, not recommendations.
Is 4% safe for a retirement that could run 40 years?
The 4% rule was tested on 30-year retirements. At a more conservative 3.5%, the spending-only target rises from $1,500,000 to $1,714,286.
Is the 4% rule still safe? →Could part-time income get you there years earlier?
$20,000/yr of part-time income would lower the portfolio you need by about $500,000 at your 4% withdrawal rate.
Model Barista FIRE with your numbers →How your savings rate sets your FIRE date
Independent of your income — based only on the share of your take-home pay you invest, a 4% withdrawal rate, and a 3.9% real return (7% nominal return minus 3% inflation).
| Savings rate | Years to FI | FIRE age |
|---|---|---|
| 20% | 41.6 yrs | 72 |
| 30% | 31.1 yrs | 61 |
| 40% | 23.6 yrs | 54 |
| 50% | 17.8 yrs | 48 |
| 60% | 13.1 yrs | 43 |
| 70% | 9.1 yrs | 39 |
What actually changes your FIRE number?
Your FIRE number is mainly a spending target, not an income target. The calculator estimates the portfolio needed to support your annual expenses at your chosen withdrawal rate.
- Annual spending — The biggest lever — $60,000/yr drives the base target.
- Withdrawal rate — At 4%, your spending is multiplied by 25×. A lower rate raises the target.
- Taxes — Tax-deferred and taxable accounts need a larger pre-tax balance to deliver the same spendable income.
- Healthcare before Medicare — If you retire before 65, add an estimate — it adds a finite bridge to your target.
- Inflation — Today's-dollars view keeps the target comparable to your current spending; future-dollars shows the nominal number you'll actually need.
- One-time expenses — Large one-off costs (a car, a wedding, home repairs) aren't in the formula — budget for them separately.
Worth101 Research
FIRE trade-offs and retirement realities
Your FIRE number is driven by spending and the costs around it. Each figure below recalculates from your current inputs.
1) The 25x rule breaks when spending changes
At your 4% withdrawal rate, every extra $1,000/yr of spending adds about $25,000 to the portfolio you need. Your current $60,000/yr implies a FIRE number of about $1,500,000.
Shown in today's dollars at a 4% withdrawal rate. Lowering spending is the most direct way to shrink the target.
▼ Read analysis: why does this happen?▾
Why it's linear: the FIRE number is spending ÷ withdrawal rate, so the target scales directly with spending. Dividing by 4% is the same as multiplying by 25.
The lesson: a permanent $500/mo lifestyle cut doesn't just save money now — it can lower your target by six figures, pulling your FIRE date years closer.
2) Healthcare before Medicare is the hidden variable
You retire at 50 — before Medicare at 65 — but haven't entered a healthcare cost yet, so your FIRE number currently equals the perpetual-spending target of $1,500,000 with no bridge added.
Add your expected pre-Medicare premium (often around $12,000/yr before subsidies) to see the bridge included here.
▼ Read analysis: why does this happen?▾
Why it's finite: unlike spending, the healthcare bridge only runs from your retirement age to 65, so it's modelled as a present-value lump rather than a perpetual cost — which is why it can be smaller than people fear.
How to lower it: ACA premium tax credits (income-based), part-time employer coverage, or a spouse's plan can all reduce the out-of-pocket estimate you enter.
3) A dollar saved is not a dollar spendable
Your $50,000 balance is worth about $50,000 after estimated withdrawal taxes in your current wrapper (Taxable brokerage). The same balance held as Roth (tax-free) would be spendable at $50,000 — a spread of $11,000 from tax treatment alone.
Uses your effective tax-rate inputs (22% ordinary income, 15% capital gains) and your taxable cost basis. Simplified flat-rate model — not tax advice.
▼ Read analysis: why does this happen?▾
Why the spread exists: Roth withdrawals are tax-free, taxable accounts owe capital-gains tax only on gains above your cost basis, and every pre-tax 401(k) dollar is taxed as ordinary income on the way out.
Simplifications: the comparison assumes the same dollar balance in each wrapper (in reality pre-tax and after-tax contributions are not equivalent), flat effective rates, and no state tax. It is a directional illustration, not a conversion plan — pair it with the early-access rules in the Roth conversion ladder guide before acting on it.
What is FIRE, Coast FIRE, and Barista FIRE?
Full FIRE means your portfolio can fund your spending indefinitely. At a 4% safe withdrawal rate, the perpetual-spending portion of your FIRE number is your annual spending times 25 — so $60,000 of spending implies $1,500,000 — your FIRE number.
Coast FIRE is reached earlier: once your invested savings are large enough to compound into your full FIRE number by your target age, you can stop saving for retirement entirely and just cover current expenses.
Barista FIRE sits in between — part-time income (and often employer healthcare) covers part of your spending, so you need a smaller portfolio than full FIRE.
See all FIRE types explained: Lean, Regular, Chubby, Fat, Coast, and Barista →
The 4% rule and your FIRE number
Your $1,500,000 base target is simply $60,000 of spending divided by 4% — here is the research behind that division.
FIRE number = Annual spending ÷ Safe withdrawal rate
The 4% rule comes from the Trinity Study: historically, withdrawing about 4% of your starting portfolio each year (adjusted for inflation) survived a 30-year retirement in nearly all market scenarios. Dividing by 4% is the same as multiplying spending by 25.
A more conservative 3.5% rate raises the bar (multiplying spending by ~29) and is worth modeling if you retire very early or want extra safety margin. Try it in the sensitivity table, or use the Safe Withdrawal Rate calculator to compare rates side by side.
Where to hold FIRE savings (2026 US limits)
A $1,500,000 target is not one number in practice: pre-tax, Roth, and taxable dollars are not worth the same at withdrawal time.
- Roth IRA — up to $7,500/year ($8,600 if 50+). After-tax in, tax-free growth and qualified withdrawals — ideal for early-retirement flexibility.
- 401(k) — up to $24,500/year ($32,500 if 50+). Pre-tax growth; capture any employer match first. Early withdrawals need a Roth conversion ladder or 72(t).
- Taxable brokerage — no cap and no early-withdrawal penalty, which makes it the bridge that funds the years before 59½. Gains are taxed as you realize them.
These are 2026 contribution limits, not tax advice. The calculator routes your inputs into the account type you choose. Verify current limits in the IRS 2026 announcement.
Healthcare before Medicare
You retire at 50 — 15 years before Medicare — and your healthcare input is currently $0, so this cost is missing from your number.
If you retire before 65 you bridge the gap to Medicare yourself — usually an ACA Marketplace plan, often around $12,000/year before ACA subsidies. Add your estimate in the calculator and it is modeled as a finite bridge ending when Medicare generally begins at age 65. Subsidies are income-based — many early retirees pay far less than the sticker price.
FIRE Number Calculator FAQ
How do I calculate my FIRE number?▼
Divide your annual spending by your safe withdrawal rate. At the classic 4% rate that is the same as multiplying spending by 25 — $40,000 of spending needs $1,000,000, and $80,000 needs $2,000,000. Add any pre-Medicare healthcare cost to your spending before dividing.
Why is the FIRE number 25 times spending?▼
25× is simply 1 divided by 4%. The multiplier moves with your withdrawal rate: a 3.5% rate is ~29× spending, while a 5% rate is 20×. A lower rate is safer but raises the portfolio you need.
Should I use gross or net spending for my FIRE number?▼
Use the spending you actually expect in retirement, including taxes you will owe on withdrawals and your own healthcare before Medicare. Mortgage payoff, child-rearing years ending, or relocation can all change that number, so model a few spending levels.
Does a bigger FIRE number mean I retire later?▼
Not always. Your retirement age depends on the gap between your current investments plus contributions and your target. Two people with the same FIRE number can reach it years apart depending on savings rate and starting balance.
Is the FIRE number in today’s or future dollars?▼
The today-dollar target is comparable across ages. The future-dollars toggle inflates the target to your retirement age and compares it with the nominal after-tax portfolio path. Coast FIRE remains the amount required today.
How does my savings rate change my FIRE date?▼
Your savings rate — the share of take-home pay you invest — sets your years to FI on its own, regardless of income: at a 5% real return and the 4% rule, a 50% savings rate reaches FI in roughly 17 years, while 70% gets there in under 9. The savings-rate table above shows the years and FIRE age for your own return and withdrawal-rate assumptions.
How these numbers work: the FIRE number is your annual spending (plus any pre-Medicare healthcare you enter) divided by your safe withdrawal rate, shown in today’s dollars. Projections assume a fixed annual return and inflation rate — deterministic, not a market-volatility simulation, and not financial advice. Read the full methodology, assumptions & sources →
New to compounding? The compound interest calculator shows the growth math behind every FIRE projection.
Sources cited
- IRSIRS — 2026 retirement contribution limitsOfficial 2026 401(k), IRA, Roth IRA, and catch-up contribution limits.
- CMSMedicare.gov — Get started with MedicareOfficial Medicare eligibility and enrollment guidance.
- SSASSA — Delayed retirement creditsOfficial Social Security guidance on delaying retirement benefits.
- BLSBLS Consumer Price IndexUS Bureau of Labor Statistics inflation data.
- IRSIRS Publication 590-B (Roth IRA distributions)IRS guidance on Roth IRA tax treatment and required minimum distributions.