Originally Posted by Katsmeow
I actually had a bigger problem. I tried to set it up to have the first year have the default annual spending of $X and then to have additional expenses of $Y which were substantial but well below $X. Then I had additional spending in the next year of about half of $Y and then in the third year additional spending that was about 1/4 of $Y. I carefully set it up so that the additional spending was for only one year.
Well I was shocked to find that I had 0% probability of the portfolio surviving. I was shocked and looked at the annual spending. The planner was showing year 1 spending of three times $X when the actual entered spending was about 1.4 times $X. Same thing was that it showed huge spending for the next two years as well.
I'm the guy that created the Flexible Retirement Planner and I'm sorry to hear you had a bad experience with it. I'd be happy to work with you by PM or email to get to the bottom of what was going on with those inputs.
The Flexible Retirement planner was created around 6 years ago and runs Monte Carlo retirement simulations for tens of thousands of users every year. At this point, it's pretty well vetted.
Still, there's always a chance that you may have uncovered a corner case that hasn't been seen before. If you can spare a few moments and could PM or email me with the inputs that were causing the problem (use fake amounts), I'd greatly appreciate the chance to work through it with you.