Coast FIRE at 45

Coast FIRE number at 45

$387,629

On $5,000 a month of spending, invested once and never added to, compounding at 7 percent real for 20 years until 65. That is 26 percent of the $1,500,000 you are aiming at.

At 45 you have twenty years of growth left, which roughly quadruples what you hold. The coast number at $5,000 a month of spending is about $388,000.

For the first time the figure is a substantial fraction of the finished portfolio rather than a small one, and that changes what the decision actually means.

Coast FIRE at 45 by monthly spending

Monthly spending	FIRE number	Coast FIRE at 45
$3,000	$900,000	$232,577
$4,000	$1,200,000	$310,103
$5,000	$1,500,000	$387,629
$6,000	$1,800,000	$465,154
$8,000	$2,400,000	$620,206

Coasting at 45 is a real decision with real consequences

At 25 the coast number is about 7 percent of the eventual target, so hitting it feels like a curiosity. At 45 it is about 26 percent. The gap between coasting and continuing to invest is no longer decades of compounding, it is a decision about the next twenty years of your working life.

The other thing that changes is sequence risk. Someone who stops contributing at 45 and hits a poor decade of returns in their early fifties has no contributions arriving to buy the dip, and only ten to fifteen years to recover. That is the scenario the sensitivity table is really describing, and it is why most people at this age keep contributing at a reduced rate rather than stopping outright.

If returns disappoint

The return assumption moves this number more than anything else you can control. At $5,000 a month of spending, here is the same calculation at 45 across a realistic range.

Real return	Coast FIRE at 45
5 percent	$565,334
6 percent	$467,707
7 percent	$387,629
8 percent	$321,822

Run it on your own numbers

Your spending, your retirement age, your return assumption, and what you already have invested.

Open the Coast FIRE calculator

Common questions

Is coasting still worth it at 45?

It depends entirely on what you would do with the freedom. Coasting at 45 typically means moving to lower paid work you prefer, not stopping work. If the job you would move to pays enough to cover your spending without touching investments, the maths works. If it does not, you are drawing down early, which is a completely different calculation.

What about healthcare before 65?

This is the question that undoes more early retirement plans than market returns. If you leave employer coverage before Medicare at 65, marketplace premiums become a spending line, and the 400 percent federal poverty level subsidy cliff returned in 2026. For a couple that lands at $84,600 of income. Cross it by a dollar and the premium credit goes to zero.

Coast FIRE at other ages

Figures assume a 4 percent withdrawal rate, 7 percent real returns and retirement at 65, with spending expressed in today's money. This is general information, not financial advice.