Coast FIRE means saving enough now that compound growth alone will fund your retirement, so you can stop contributing and only cover current living expenses. This calculator finds your Coast FIRE target based on retirement expenses and timeline.
How to use this calculator
- Enter your expected annual expenses in retirement.
- Enter your safe withdrawal rate.
- Enter your current age and planned retirement age.
- Enter your expected average annual return.
- Review the retirement nest egg needed, Coast FIRE number, and years until retirement.
Formula
Retirement nest egg = Annual retirement expenses ÷ (Withdrawal rate ÷ 100). Coast FIRE number is the present value of that nest egg discounted by expected return over the years until retirement.
Example
Needing $45,000 per year at a 4% withdrawal rate requires a $1,125,000 nest egg at retirement. At age 30 retiring at 65 with 7% returns, your Coast FIRE number is about $119,000.
Frequently asked questions
- What is the difference between FIRE and Coast FIRE?
- Full FIRE means you can retire now. Coast FIRE means you have enough invested that you do not need to save more for retirement, but you still work to cover current expenses.
- Does Coast FIRE account for inflation?
- This calculator uses your stated retirement expenses and return assumptions. Adjust inputs to reflect inflation expectations in your planning.