FIRE Knowledge Base
In-depth articles on Financial Independence and Early Retirement — the math, the strategies, and the risks that actually matter when you are planning a 40–50 year retirement.
In the library
68 min total reading · 4 categories
Fundamentals
Start here — the core ideas behind Financial Independence and Early Retirement.
What is FIRE? Financial Independence, Retire Early Explained
Plain-English introduction to FIRE — what Financial Independence Retire Early actually means in 2026, where the movement came from, and how it has evolved.
7 min readYour FIRE Number
Your FIRE number is the portfolio size that lets you retire early. Learn the formula, the 25× rule, why 28–30× is more realistic for long retirements, and benchmarks for 2026.
8 min readMath & strategy
Withdrawal rates, savings-rate math, and the risks you actually need to plan for.
Safe Withdrawal Rate
The safe withdrawal rate (SWR) is the share of your portfolio you can spend each year without running out. Why 4% is a baseline, why 3.25–3.5% fits a 50-year retirement, and how dynamic strategies improve outcomes.
10 min readSavings Rate
Your savings rate determines how fast you reach financial independence — far more than your income. The math, a 2026 timeline table, and how to raise yours without misery.
9 min readFIRE variants
Lean, Fat, Coast, and Barista FIRE — picking the path that fits your life.
Lean FIRE vs Fat FIRE
Lean FIRE means retiring frugally on $25,000–$40,000 a year. Fat FIRE means retiring comfortably on $100,000+. A side-by-side comparison with target portfolios, lifestyle tradeoffs, and 2026 benchmarks.
8 min readCoast FIRE Explained
Coast FIRE is the moment your portfolio is large enough that compound growth alone will reach your FIRE number — without another dollar of contributions. The formula, target ages, real-return assumptions, and how it differs from Barista FIRE in 2026.
9 min readPlanning & risks
Inflation, sequence risk, and other forces that shape an early-retirement plan.
Sequence of Returns Risk
Sequence of returns risk is the danger that a market downturn early in retirement permanently damages your portfolio. Why it is the #1 risk for FIRE retirees in 2026 and how to defend against it.
9 min readInflation and Your FIRE Plan
After the 2022–2024 inflation reset, every FIRE plan must distinguish real returns from nominal. Why 2% inflation is dead as a default, the assumptions to use in 2026, and how a one-point inflation change moves your FI date by years.
8 min readReady to put the theory to work?
Use the free FIRE Calculator to project your personal path to financial independence.