A score, not just a number
Most FIRE calculators spit out a single figure โ "you need $1.5M" โ and leave you with no idea whether you'll actually get there. This assessment is different. Twelve questions across five dimensions produce a 0โ100 readiness score that reflects not just where you are against your FI number, but whether your habits, portfolio, and post-retirement plan are actually compatible with retiring early. Under the quiz, the same math you'd find in any FI calculator โ FI number = annual expenses ร 25, and years-to-FI as a function of savings rate โ runs live as you change the inputs.
The five dimensions: progress (how close are you?), savings rate (the only variable that really matters), portfolio (are you in the right funds and can you behave during a crash?), expenses (do you know them and can you resist lifestyle inflation?), and life readiness(healthcare and purpose, the two things that kill early retirements). Most people score 40โ60 on the first pass. That's normal; the point is the map, not the score.
What each tier means
- FI-ready (85+):You're genuinely close or at FI with the behavioral and structural pieces in place. Remaining work: tax optimization, a Roth conversion ladder, and what you'll actually DO โ not saving more.
- On track (65โ84):Strong fundamentals. Your lowest-scoring section is the bottleneck; fix it for 12โ18 months and you'll convert momentum into real distance.
- Building (45โ64): Habits are forming but not yet compounding. Savings rate is almost always the bottleneck at this tier. Push it up 5 points this year; the FIRE math does the rest.
- Early (25โ44): Foundation work phase. Pay off high-interest debt, build an emergency fund, establish a 15%+ savings rate as a baseline before thinking about FI number at all.
- Pre-start (under 25): Skip FI planning for now. Single highest-impact move: positive monthly cashflow and capturing your 401(k) match. Everything else is downstream of that.
Why savings rate is the only variable that matters
In 2012, Mr. Money Mustache published a table that changed the early-retirement movement: given constant after-tax income and expenses, years to FI depend only on your savings rate โ not your actual income. Starting from zero assets, assuming 5% real returns:
- 10% savings rate: 51 years to FI
- 15%: 43 years
- 20%: 37 years
- 25%: 32 years
- 35%: 25 years
- 50%: 17 years
- 65%: 11 years
- 75%: 7 years
Why the acceleration? Raising savings rate does two things at once: it grows the portfolio faster, and it lowers the target (the FI number denominator โ annual expenses โ gets smaller). A 50% saver needs less portfolio than a 10% saver because they live on less. This is why the quiz weights savings rate so heavily.
The flavors of FIRE
- Lean FIRE: $25Kโ$40K/year expenses, $625Kโ$1M FI number. Requires deliberately frugal living, often with geographic arbitrage.
- Regular FIRE: $50Kโ$80K/year, $1.25Mโ$2M. Mostly middle-class lifestyle with intentional spending.
- Fat FIRE: $100K+/year, $2.5M+. Retire at a high standard of living.
- Barista FIRE: Reach the point where part-time work covers expenses and the portfolio compounds untouched. Typically 50โ75% of a full FI number.
- Coast FIRE: Front-load savings in your 20sโ30s so the portfolio compounds to a full FI number by age 60โ65 with no additional contributions. Example: $347K at age 30 compounds to $1.5M by age 65 at 5% real returns.
- Slow FI: Stay in meaningful work and use FI to enable sabbaticals, fewer hours, and career switches instead of stopping entirely.
Is 4% still the right withdrawal rate?
The 1998 Trinity Study used 30-year retirements โ fine for traditional retirees at 65, short for someone retiring at 40. Updated research (especially Early Retirement Now's detailed simulations) suggests 3.25โ3.5% is safer for 50-year retirements, especially starting from elevated valuations.
- 4% rate: 25ร expenses. Canonical FIRE, safe for ~30 years.
- 3.5% rate: 28.5ร expenses. Recommended for 40โ50 year retirements.
- 3% rate: 33ร expenses. Very conservative; essentially endowment-style perpetual withdrawal.
- 5% rate: 20ร expenses. Viable with flexibility, part-time income, or Social Security cushion.
Most people also forget Social Security exists. A 40-year-old retiring with $1.5M who expects $30K/year in benefits at 67 has way more margin than pure FI math suggests. Running strictly portfolio-only is the conservative choice.
The four killers of early retirement plans
Forgetting healthcare pre-Medicare
Before 65, health insurance for an early-retiree couple runs $15Kโ$25K/year on an ACA marketplace plan, more without subsidies. Many early retirees deliberately structure Roth conversions to keep AGI low and qualify for maximum ACA subsidies. Include healthcare in your expense estimate โ or your FI number is too low by six figures.
Lifestyle creep
Kids, aging parents, and incremental upgrades (nicer travel, bigger house, car leases) push expenses up over time. Real lifestyleinflation isn't captured by real-return math. Be honest: will your $50K/year hold at 55 and 75, not just 35?
Sequence-of-returns risk
A 40% market drop in year one of retirement is devastating in a way the same drop in year 15 isn't โ you're selling depleted assets. The 4% rule survives most historical sequences, but not all. Mitigations: 1โ2 years of expenses in cash/bonds, flexible spending in down years, part-time income for the first few years.
Post-FIRE emptiness
This one rarely shows up in calculators. Many early retirees report the first six months are bliss, then the next year feels hollow. Work provides structure, identity, and social connection that money alone doesn't replace. The healthiest plans have a specific picture of what retirement looks like, not just what it costs โ and the quiz's "Life" section explicitly penalizes plans that skip this step.
Coast FI, in one formula
Coast FI = FI number รท (1 + real return)^years-to-65. For a $1.5M target, 30-year horizon, 5% real returns: $1,500,000 รท 1.05ยณโฐ = $347,000. Someone in their 30s with $347K invested can technically stop saving and still retire comfortably at 65 โ as long as markets deliver their historical average. Coast FI is a popular halfway milestone because it offers psychological freedom (you no longer have to save) while ongoing work still covers current expenses.
Step-by-step action plan by tier
Pre-start / Early (under 45)
- Get into positive monthly cashflow โ cut expenses OR raise income.
- Build a $1,000 starter emergency fund.
- Capture full 401(k) match (free money you're leaving on the table).
- Pay off credit cards and high-rate personal loans.
- Establish automatic 15% savings rate as a baseline.
Building (45โ64)
- Track actual annual expenses for 12 months. Use the subscription analyzer and 50/30/20 budget to find the leaks.
- Max Roth IRA, HSA (if eligible), and 401(k) up to match.
- Move all investments into low-cost index funds (expense ratio under 0.15%).
- Raise savings rate by 5 points this year via raises-to-savings rule.
On track (65โ84)
- Max all tax-advantaged accounts; redirect excess into taxable brokerage.
- Build tax diversification: Traditional, Roth, taxable in roughly 40/30/30.
- Research ACA subsidies and model the Roth conversion ladder.
- Start practicing post-FI life: hobby, project, community commitment.
FI-ready (85+)
- Build 1โ2 years of cash/bond buffer to mitigate sequence-of-returns risk.
- Implement a Roth conversion ladder in low-income bridge years.
- Finalize healthcare strategy: ACA + HSA or COBRA bridge.
- Commit to a post-FIRE structure โ volunteer role, part-time consulting, specific projects โ before pulling the trigger.
Related tools
- Retirement calculator โ same math framed for traditional retirement.
- Compound interest calculator โ see the raw power of each saved dollar.
- Net worth calculator โ the running status check against your FI number.
- 50/30/20 budget โ lower expenses and raise savings rate simultaneously.
- Emergency fund readiness quiz โ the prerequisite to serious FI investing.
Frequently asked questions
Does Social Security count toward my FI number?
Yes, though conservatively. A common approach: ignore SS for the primary calculation, then run a second scenario assuming 70โ80% of projected benefits. At current law, $30K/year in benefits effectively replaces $750K of portfolio โ significant cushion.
What if I have a pension?
Treat it like Social Security. A $40K/year pension at 4% withdrawal is equivalent to $1M of portfolio. Subtract it from the required FI number when computing your target.
Is this realistic on a median income?
Yes, but slowly. A single earner making $65K with $45K/year expenses and a 30% savings rate reaches Lean FI ($1.1M) in about 23 years with historical returns. Dual-income households can get there in half the time.
What's the catch?
The catch is that FI requires you to seriously reduce spending relative to peers, sustain it for a decade or two, and keep investing through scary market periods. Most people don't want to โ which is fine, but it's why the FIRE movement has more books than practitioners.
Why does the quiz weight behavior as heavily as math?
Because math alone doesn't retire anyone. Selling during a 2008-style crash, drifting into lifestyle creep after a raise, never defining what you'd DO post-retirement โ each of these kills more FI plans than insufficient savings. The score penalizes them explicitly so you see them before they sink the plan.
How often should I retake the assessment?
Annually, plus after any major life event โ raise, marriage, kid, home purchase, job change. The inputs drift quietly; the quiz catches the drift before a decade of compounding locks it in.