According to studies, a 4 % initial withdrawal rate coupled with annual inflation adjustments should allow you to make it through a 30 - year retirement without depleting your savings. (humbledollar.com)
In the case of Jim Phillips, the financial planner took the traditional route, advising him to withdraw 3.5 % to 4 % of his initial capital each year, with annual inflation adjustments. (moneysense.ca)
Once you have reached the target level, annual inflation adjustments should take care of increases; but the level should be reviewed every five years, in case things are getting out of whack. (canadianbusiness.com)