But there is an objective way to know when you've reached your number using the concept of "Safe Withdrawal Rate". If your savings (typically in the form of a d

But there is an objective way to know when you've reached your number using the concept of "Safe Withdrawal Rate". If your savings (typically in the form of a diversified portfolio) is at about 25 times your typical annual expenditure, you can retire with relative safety (See for example https://www.bogleheads.org/wiki/Safe_withdrawal_rates https://www.bogleheads.org/wiki/Safe_withdrawal_rates). Last year, my savings had reached over 60x annual expenditure so I felt more than safe even with allowances for self-insurance for long-term care and higher education for my children. How much more do you need?