Am I Coast FIRE Yet? How to Know You've Reached It

"Wait — am I actually Coast FIRE?" It's one of the most common questions people ask once their balance starts to feel real. The good news is that it's a precise question with a precise answer. You don't have to guess or rely on a feeling — you can check it in three steps.

What Coast FIRE actually means

You've reached Coast FIRE when the money you already have invested will grow to your full retirement target on its own — without you adding another dollar — by the time you retire. It does not mean you can retire now. It means you can stop contributing and let compounding finish the job, while your income only needs to cover today's expenses.

That distinction is the whole point, and it's why the answer is binary: either your current assets are enough to coast, or they aren't yet.

The 3-step check

Step 1 — Find your FIRE number. Take your expected annual spending in retirement and divide by your safe withdrawal rate. At the standard 4% rule, that's spending × 25.

$40,000 spending ÷ 4% = $1,000,000 FIRE number

Step 2 — Discount it back to today. Your Coast FIRE number is your FIRE number divided by growth over the years until retirement, using your expected real return.

Coast number = FIRE number ÷ (1 + real return) ^ years to retirement At 30, retiring at 60, with a 5% real return: $1,000,000 ÷ 1.05³⁰ ≈ $1,000,000 ÷ 4.32 ≈ $231,000

Step 3 — Compare to your invested assets. If your current invested assets are greater than or equal to your Coast FIRE number, you've reached Coast FIRE.

Invested $231,000 or more at 30? You can stop contributing and still hit $1,000,000 by 60. You're Coast FIRE.

That's the entire test. Rather than do the arithmetic by hand, plug your own numbers into the Coast FIRE number calculator — it runs all three steps and tells you instantly whether you've crossed the line.

What counts as "invested assets"

The check only works if you count the right things:

• Include: money actually invested for retirement — brokerage, 401(k), IRA, Roth, HSA, index funds.
• Exclude: your emergency cash, your checking account, and the equity in the home you live in. None of that is compounding toward your retirement target in the way the formula assumes.

Counting your house or cash buffer is the most common way people think they've reached Coast FIRE when they haven't.

Common mistakes that give a false reading

• Using a nominal return instead of a real one. If you assume 7% but don't subtract inflation, your Coast number looks too small and you'll think you're there early. Use a real (after-inflation) return — around 5% is a reasonable, conservative figure.
• Forgetting the gap years. If you plan to stop working well before Social Security or a pension starts, your portfolio has to bridge those years alone. The basic check assumes your assets fund the whole retirement.
• Optimistic return assumptions. A 9% assumption makes almost anyone look Coast FIRE. Stress-test with a lower return and see if you still clear the bar.
• Ignoring healthcare. Early retirees often underbudget health insurance — bake a realistic figure into your spending before you compute the number.

"Can I coast?" vs "should I quit?"

A lot of the anxiety around this question comes from conflating two different decisions. Reaching Coast FIRE means saving becomes optional — every future paycheck shifts from mandatory to extra. It does not require you to quit, downshift, or change anything at all. Many people pass their Coast FIRE milestone and keep working for a year or two anyway, simply enjoying the fact that they no longer have to save. Knowing you've crossed the line is valuable on its own, whatever you choose to do next.

The takeaway

You're Coast FIRE the moment your invested assets meet or exceed your Coast FIRE number — full stop. Find your FIRE number, discount it to today, and compare. Count only money that's actually invested, use a real return, and don't let a paid-off house or a cash buffer fool you into reading the result early. When you're ready to know for certain, calculate your Coast FIRE number — and if you want to see how many years to full independence, the FIRE calculator maps the rest of the journey. For the bigger picture, start with what Coast FIRE is.

This article is for educational purposes only and is not financial advice. Figures are illustrative and depend on assumptions that may not match your situation.