RETIREMENT CHANNEL
Coast FIRE Calculator
Calculate your Coast FIRE target savings threshold to see when you can stop active contributions.
Calculator Variables
Calculation Overview
Find your Coast FIRE number to see if your current savings are enough to compound to your retirement target without another contribution.
Mathematical Model & Formula
Coast FIRE = FIRE Target / (1 + r)^t
Discount-compounds the final target back to present value to find what starting sum will compound to that target on its own.
Variables Defined:
- FIRE Target: 25 times expected annual retirement expenses
- r: Real expected compound growth rate
- t: Years remaining until target retirement
Worked Example Scenario
Scenario: Age 30 wishing to retire at 60 on $60,000/yr (7% returns).
- FIRE Target = $60,000 * 25 = $1,500,000
- Years (t) = 30
- Coast FIRE = $1,500,000 / (1.07)^30 ≈ $197,052
Result: You need $197,052 saved today.
Frequently Asked Questions
What is Coast FIRE?
The point where you have saved enough retirement assets that you do not need to make any more active contributions to compound to your target retirement nest egg.