Hello all,

I’m looking for a withdrawal calculation/formula, akin to the 4% rate, but which enables calculating a withdrawal rate so that in X years I end with zero dollars.

For example, if Jim retires at 50 with 1 million dollars and expects to live another 30 years, what is the best way to calculate his withdrawal rate to expire at 80 years of age with no money. It is like a reverse amortised mortgage, but just needs to factor in that Jim’s principal will be simultaneously shrinking (as he spends) and growing (as his investments advance at say 7% per year).

I guess what I’m asking is that I don’t want to get to the very end and think, oh, I could have spent way more, donated way more, instead be left with lots of unspent money at the end. Any ideas? I have looked around the forums and cannot see this, but please guide me if the answer is around somewhere.