When Can I Retire?
Project your FIRE timeline, track your progress, and plan your retirement lifestyle.
Knowing your FIRE number is one thing. Knowing when you'll reach it — and what life looks like after — is another. These tools project your timeline, track your progress, and help you plan the practical side: where to live, how to budget for kids, what healthcare costs to expect, and how inflation affects your plan.
Knowing your FIRE number is one thing. Knowing when you'll reach it — and what life looks like after — is another. The math seems simple: at a 50% savings rate, FI takes ~17 years from zero; at 70%, under 9 years; at 30%, ~28 years. But real life intrudes. Market returns vary. Inflation compounds. Children arrive. Parents need care. The simple timeline calculator assumes a fixed 7% real return; the realistic one runs Monte Carlo simulations across thousands of market scenarios to give you a probability of success.
FIRE planners face a 40-50+ year retirement — fundamentally different from traditional 30-year retirements. Healthcare costs in retirement average $315,000+ per couple (Fidelity 2025 estimate). Inflation at 3% over 50 years erodes purchasing power by a factor of 4.4. And lifestyle inflation is the silent FI-killer: a $5,000/year raise that becomes a $5,000/year spending increase pushes your FI date back by 2-3 years.
These calculators project the realistic timeline: when you'll hit FI, how Monte Carlo stress-tests the plan, what life-stage transitions cost, how inflation and healthcare erode (or protect) purchasing power, and how Social Security timing affects your number.
Monte Carlo vs deterministic projections
Deterministic projections use a single fixed return (usually 7% real) to draw a single timeline. Monte Carlo simulations run your plan through thousands of randomized market scenarios — varying returns, inflation, sequence — and produce a probability distribution. The 85% success rate threshold is the FIRE community consensus: anything below 80% is too risky, anything above 95% suggests you're working too long.
The choice matters. At a 7% real return, a 4% withdrawal rate succeeds in 95% of historical 30-year periods. But the worst 5% of historical sequences included real retirees who ran out of money in their 70s. Monte Carlo surfaces this risk: a 95% success rate means there's still a 1-in-20 chance your specific sequence is one of the bad ones. The Monte Carlo FIRE Calculator and Sequence Risk Calculator quantify this exposure.
For early retirees with 50-year horizons, Monte Carlo is essential. The Withdrawal Strategy Calculator compares the 4% rule, Guyton-Klinger guardrails, VPW, and CAPE-based dynamic withdrawals across 5,000+ historical sequences — showing which approach maximizes sustainable spending with the lowest failure rate. The takeaway: a 3.25-3.5% initial withdrawal rate with dynamic adjustments outperforms a static 4% for long retirements.
Life stages and FIRE
Your FIRE number shifts at every life stage. Single accumulation (22-30): maximum savings rate, smallest fixed expenses, geographic arbitrage opportunity. FIRE number here is often $500K-$1M. Couple/DINK (28-40): combined incomes, shared expenses, often 50-60% savings rate. FIRE number $1M-$1.5M. Family with kids (30-45): childcare adds $15K-$30K/year, college savings begins. FIRE number $1.5M-$2.5M. Pre-retirement (50-65): peak earnings, max catch-up contributions ($24,500 + $7,500 catch-up = $32,000 for 401k). FIRE number final. Early retirement (40-55): ACA healthcare costs $8K-$18K/year, sequence risk highest.
The FIRE With Kids Calculator and Couple FIRE Calculator model these transitions. The Lifestyle Inflation Calculator quantifies how spending creep — bigger apartment, nicer car, more subscriptions — delays FI. Most FIRE planners find that capping lifestyle inflation at 50% of each raise (saving the other 50%) keeps them on track without feeling deprived.
Inflation, healthcare, and the 40-year retirement
FIRE retirees face a 40-50 year retirement. Two forces compound against you: inflation at 3% doubles prices every 24 years; over 50 years, $1 of purchasing power becomes $0.23. Healthcare costs historically grow faster than inflation (5-7% annually) — Fidelity estimates $315,000+ per couple for retirement healthcare, and that's for traditional-age retirees. Pre-65 early retirees face higher ACA premiums ($8K-$18K/year).
The Inflation-Adjusted FIRE Calculator and Cost of Living Calculator model these forces. The Social Security Optimizer helps you decide when to claim (62 vs 67 vs 70) — delaying from 62 to 70 increases benefits by 76%, often worth $200K+ lifetime. For FIRE retirees who can bridge to 70 with portfolio withdrawals, delaying Social Security is usually the highest-ROI financial decision available.
The 40-year retirement also means your portfolio will experience multiple bear markets, 2-3 recessions, and likely a major crisis (war, pandemic, financial collapse). Sequence risk is highest in years 1-5 of retirement. The Safe Withdrawal Rate Calculator and Bond Tent Calculator model strategies to mitigate this risk.
How to use these calculators together
A systematic approach yields the most reliable timeline projection. Start with the FIRE Timeline Calculator using a 7% real return assumption — this gives you the deterministic baseline: "If everything goes to plan, I hit FI in 12 years." Then stress-test that baseline against reality. Run the Monte Carlo FIRE Calculator with a 5% real return and check that success rate stays above 85%. If it drops below 80%, your timeline is too optimistic. Next, adjust for life-stage projections: add the couple/kids scenario from the Couple FIRE Calculator or FIRE With Kids Calculator, then re-check your Monte Carlo success rate. After that, layer in healthcare costs using the ACA Subsidy Estimator: a $15,000/year healthcare line item shifts your FIRE number by $375,000 at a 4% withdrawal rate. Factor in inflation with the Inflation-Adjusted FIRE Calculator — a 3% inflation assumption vs 2% adds 3-5 years to your timeline. Finally, use the Social Security Optimizer to decide your claiming strategy.
This four-pass approach — deterministic baseline, Monte Carlo stress test, life-stage adjustment, healthcare-and-inflation layering — produces a timeline range rather than a single date. Most FIRE planners find the range spans 3-5 years: the optimistic case (bull market, low inflation, no kids) vs the conservative case (sideways market, 4% inflation, 2 kids). The realistic case usually falls at the 65th percentile of that range. Planning to the conservative case and then being pleasantly surprised is the better strategy than planning to the optimistic case and being forced back to work. The tools in this category give you the data to make that decision with confidence rather than guesswork.
The timeline is ultimately an output of decisions you control: savings rate, geographic location, family timing, withdrawal strategy, and Social Security claiming age. No calculator can predict market returns with certainty, but layering deterministic projections with Monte Carlo simulation and conservative inflation assumptions reveals where your plan is fragile and where it has margin. Use these calculators annually — at minimum when you file taxes — to track progress against your projected timeline. A plan that drifts by 6 months is fine; one that drifts by 3 years needs a course correction.
Key Takeaways
- Timeline is the output, not the input — your savings rate and returns drive it, not the calendar
- Monte Carlo simulation (5,000+ scenarios) is more realistic than deterministic 7% real return projections
- Life stages shift your FIRE number by 30-60%: single → couple → family → pre-retirement
- 3% inflation over 50 years erodes purchasing power by a factor of 4.4 — $1 becomes $0.23
- Healthcare is the largest variable cost: $315K+/couple (Fidelity 2025), and pre-65 ACA adds $8K-$18K/year
You know your FIRE number. Now map the journey. The FIRE Timeline shows your projected path year by year. The Progress Tracker shows your FI percentage as a gauge. Monte Carlo simulation stress-tests your plan against thousands of market scenarios.
All 16 Calculators in This Category
Frequently Asked Questions About When Can I Retire?
How is my FIRE timeline calculated?
FIRE timeline = years until your portfolio reaches your FIRE number, given your current savings, annual contribution, and expected real return. The formula: years = ln((target × r + annual savings) / (current × r + annual savings)) / ln(1 + r). At 50% savings rate and 7% real return, the math gives ~17 years from zero. Use the FIRE Timeline Calculator with your specific inputs.
How do I read a Monte Carlo simulation result?
Monte Carlo runs your plan through 5,000+ randomized market scenarios and reports the percentage that succeed. 95%+ is conservative; 85-95% is the FIRE community sweet spot; below 80% is too risky. A 'success' means you don't run out of money before the end of the planning horizon. The Monte Carlo FIRE Calculator visualizes this distribution as a histogram.
What inflation rate should I use?
Use 3% as the standard baseline (matches Federal Reserve's long-term target). For more conservative planning, use 3.5-4% (reflects recent decades). The Inflation-Adjusted FIRE Calculator and FIRE Number Calculator both let you stress-test with 2%, 3%, and 4% inflation assumptions. Higher inflation assumptions extend your timeline.
How does ACA healthcare subsidy work before Medicare at 65?
ACA marketplace premiums are income-based. At MAGI below 400% of the Federal Poverty Line (~$60,000 for individual in 2026), you qualify for premium tax credits. Early retirees with low portfolio withdrawals can qualify for $0-$400/month bronze plans. Above 400% FPL, unsubsidized premiums run $400-$1,200/month. The Healthcare Cost Calculator and ACA Subsidy Estimator model this in detail.
How do kids affect my FIRE timeline?
Each child adds 2-5 years to your timeline depending on savings rate and childcare costs. Daycare ($1,000-$2,500/month per infant) is the biggest expense in years 0-5; K-12 adds $3K-$10K/year per child; college adds $25K-$80K/year per child for 4 years. The FIRE With Kids Calculator models these stages with your specific income and savings rate.
How does cost of living vary between cities?
Cost of living varies 30-60% between US metros. San Francisco and NYC run 50-80% above national average; Cincinnati, Pittsburgh, and Memphis run 15-25% below. Internationally, FIRE-friendly destinations like Mexico City, Lisbon, and Chiang Mai run 40-70% below US averages. The Cost of Living Calculator and city FIRE guides quantify this for 75+ US cities and 20+ international cities.
How do I avoid lifestyle inflation?
Cap lifestyle inflation at 50% of each raise: when you get a $10,000 raise, allow $5,000 in lifestyle upgrades and save/invest the other $5,000. This keeps your savings rate from dropping as income grows. The Lifestyle Inflation Calculator shows how a $5,000/year spending habit can delay FI by 5+ years. Practical tactics: house-hack, buy used cars, cook at home, negotiate recurring bills annually.
What retirement age should I target?
FIRE planners typically target 40-55 for full retirement, 55-62 for Barista/Coast FIRE, and 62-67 for traditional retirement with optimizations. The decision depends on your FIRE number, withdrawal rate, and desired lifestyle. The FIRE Timeline Calculator projects multiple retirement ages side by side. Most FIRE planners find that 2-3 extra years of saving buys substantial withdrawal-rate safety.
When should I claim Social Security?
Delaying from 62 (early) to 70 (maximum) increases benefits by 76% — and the breakeven is typically age 78-82. For FIRE retirees with portfolio capacity to bridge 62-70, delaying is usually the highest-ROI decision available, often worth $200K+ lifetime per person. The Social Security Optimizer Calculator models 62 vs 67 vs 70 with your specific portfolio and longevity assumptions.
Should I count Social Security in my FIRE number?
Conservative approach: don't count it. Aggressive approach: include 70% of estimated benefits (delayed claim) discounted to present value. Most FIRE planners subtract projected Social Security from their FIRE number rather than ignoring it entirely. If you delay to 70 and expect $30,000/year, that's $600K-$900K present value — meaningful. The FIRE Number Calculator lets you include or exclude Social Security.