I have a question about the "ending balance" calculation done by FIRECalc. Perhaps one of you veterans can enlighten me:
How accurate and reliable is the final balance number?
Let me explain.
When you run FIRECalc, we look at a hundred or so different (but overlapping)
historical periods of 30 years (or whatever retirement period you indicated).
The 100% "safe withdrawal rate" is that withdrawal rate that would have always left something -- even if only $1 -- in the portfolio for each of those historical periods.
Of course, some of those periods would have produced fantastic returns. Less than 100% safe means some periods resulted in a loss before the end.
For example, here are the results of a 91% safe rate.
As you can see, then ending balances are all over the place. The
average ending balance is just the average of all those ending balances.
Now, is it accurate and reliable? Well, yeah, BUT...it's accurate regarding what already happened, but only useful as a guide as far as what will happen next.
FIRECalc's results are meant to allow you to say "taking x% out of my portfolio per year for y years would have been OK during the worst that we've ever seen in this country, so I can feel somewhat comfortable that it will be OK for the next few years as well."
And if that figure is much larger than you want to leave as an estate is there a safe, sensible way to avoid that, short of withdrawing it all when you hit 95?
Actually, yes. The shorter the withdrawal period, the less risk that volatility will clobber your portfolio, and thus the more you can withdraw as a percentage.
Say you are planning on a 40 year retirement term. To minimize the ending balance, you withdraw a safe rate for a 40 year period for a few years (4.02% using the sample entries). At a future point, say after 5 years, you switch your withdrawal to the safe rate for a 35 year period. You keep doing this, and your last 5 years withdrawals will be at 13.36%. By gradually increasing your withdrawals as you put volatility risk behind you, you will be pushing that average ending balance down.
Dory36