The FIRE movement isn’t one single finish line. It’s a spectrum. “FIRE” stands for Financial Independence, Retire Early, but what “retire” means — and how much money you need — is different for everyone. These labels (LeanFIRE, CoastFIRE, ChubbyFIRE, FatFIRE) are simply shorthand for lifestyle and spending level, not a universal rule.

The Core Idea

Your FIRE number is usually estimated with a simple formula:

FIRE number = Annual spending ÷ withdrawal rate

For example, if you plan to spend 50,000/yearandusea450,000/yearandusea41.25M. The labels below are just different levels of annual spending.

LeanFIRE

LeanFIRE is the minimalist end of the spectrum. It’s about living comfortably but simply — focusing on low expenses, high flexibility, and minimal overhead.

Typical traits:

• Lower annual spend
• Smaller portfolio needed
• Often more frugal or intentional lifestyle
• High resilience if you can live well on less

LeanFIRE can feel liberating for people who value simplicity and don’t need luxury to be happy.

CoastFIRE

CoastFIRE is about reaching a point where you no longer need to contribute, because your current investments are expected to grow to your FIRE number by retirement.

In plain terms:

• You’ve already done the hard part early
• You can “coast” by covering today’s expenses
• Retirement becomes inevitable, not aspirational

It’s a great milestone for people who want to shift careers, reduce hours, or start something new without financial panic.

ChubbyFIRE

ChubbyFIRE sits between Lean and FatFIRE — comfortable, but not extravagant. It allows for more travel, better housing, dining out, and flexibility without constantly watching every dollar.

Typical traits:

• Middle‑to‑upper annual spend
• More cushion for healthcare, family, or inflation
• A lifestyle that still feels “normal” but not restrictive

This is where many people end up because it balances security with enjoyment.

FatFIRE

FatFIRE is the high‑comfort end of the spectrum. It supports premium travel, top‑tier healthcare, luxury experiences, and significant lifestyle freedom.

Typical traits:

• High annual spend
• Larger, diversified portfolio
• Less pressure to optimize every cost

FatFIRE is ideal for people who want a high‑quality lifestyle without needing to downshift.

How to Choose Your Category

Don’t start with labels. Start with your annual spending:

1. Estimate your realistic retirement lifestyle
2. Add a safety margin for inflation, health, and surprises
3. Divide by your withdrawal rate

Your number becomes your compass. The label is just a convenient shorthand.

Canada‑Specific Considerations

In Canada, your FIRE plan should account for:

• CPP and OAS timing (this can reduce your portfolio needs)
• Healthcare costs (often lower, but not zero)
• Housing and property taxes
• Tax treatment of RRSP, TFSA, and non‑registered accounts
• Inflation and long retirement horizons

A Canada‑first plan can materially change your FIRE number.

Final Thought

FIRE doesn’t have to mean “stop working.” For many people, it means freedom to choose what you work on, without money driving every decision.

Lean, Coast, Chubby, or Fat — the best version is the one that matches your life.