Coast FIRE is the quietest version of financial independence. You do not retire. You do not even stop working. You just stop worrying — because the math says your savings will grow into your full FIRE number on their own, with zero new contributions.

Regular FIRE says: save 25x your expenses, then quit. Coast FIRE says: save enough that compound growth does the rest of the saving for you, and you are free to work less, switch careers, or just exhale.

The math, one sentence

You have hit Coast FIRE when your current portfolio, growing at your expected real return, will reach your full FIRE number by your target retirement age — without you adding another dollar.

If $100,000 grows at 7% for 30 years, it becomes about $761,000. If your FIRE number is $760,000, you are already coasting.

Why it is a different kind of freedom

Traditional FIRE demands a high savings rate for as long as you work. Coast FIRE demands less, because it lets time do the heavy lifting. The catch: you have to start earlier, and you still need some income to cover your living expenses — you are just not required to keep funding your portfolio.

For a 35-year-old with $100,000 saved, the math is striking. At 7% real return, that money reaches a typical FIRE number around age 60. The next 25 years of saving become optional, not mandatory.

Who it fits

  • Mid-career professionals who have banked some money and want to downshift careers without losing the plot.
  • Parents who would rather spend the next decade on family than on a higher savings rate.
  • Career switchers — take a lower-paying job you actually like; the portfolio keeps working.
  • Anyone who started late but got an inheritance or windfall that front-loads the curve.

What it does not mean

Coast FIRE is not a license to spend everything you earn from here on. You still need to cover living expenses, healthcare, and the gap between now and retirement age. It just means your retirement portfolio is on autopilot.

It also does not insulate you from sequence risk in the years right before retirement. If you stop contributing at 35 and the market tanks at 55, you may still need to top up. The plan is sturdy, not bulletproof.

The shift in mindset

FIRE asks: how much do I need to never work again?

Coast FIRE asks: how much do I need so that working becomes a choice, not a requirement?

For a lot of people, the second question is the more useful one. The goal is not to escape work — it is to escape the feeling that you have to do the work you are doing. Coast FIRE is the math that makes that escape real.