Coast FIRE Calculator
Finds the point where you could stop saving and let investments grow to your target.
Coast FIRE number
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Share sends a link that reopens these numbers. Copy details pastes the full breakdown as a list.
Still to invest —
What you have grows to —
Reading this —
The formula
coast number = target ÷ (1 + r)^years
It is the present value of your target: the sum that grows to it with no further deposits.
What to watch out for
Use a real return so that the target stays in today’s money.
Frequently Asked Questions
What is Coast FIRE?
Having enough invested that growth alone reaches your target. For 1,000,000 in 35 years at 5% real, that is 181,290.