calculation based. tldr 25 times annual expense. u will be putting in high interest saving like epf then withdraw 3-4% a year until u die.
500k means u using 20k a year. if this is sufficient then good for u
FIRE proponents may start by calculating their FIRE number, generally 25 times their annual expenses, which is the amount of money they expect to need in order to retire comfortably.
Typically, FIRE followers withdraw 3% to 4% of their savings annually to cover living expenses in retirement.