Try using what I call a "safety factor" approach. This is the cleanest method I've found after sensitivity testing each variable and going through every forum comment.

Spending less than ESPlanner’s recommendations can be easily modeled using a “safety factor” approach based on the “Standard of Living” (SOL) index in the Assumptions tab. To do this, create a copy of your profile and set your last few years to a high SOL. This forces the program to reduce consumption in earlier years and preserves assets for late in life. Essentially, you are shifting potential consumption to the end of your life (or the life of your spouse). This can be used to create a margin of safety, gifts or bequest, as a resource for late in life healthcare and/or long-term care or other reasons.

The beauty of this approach is that it preserves all of the year by year taxes, spending, asset levels, etc. that are part of ESPlanner’s calculations and reports so you do not have to guesstimate them with side calculations. This can also be used to create different safety factors ($ or %) at different points in time.

The approach is very flexible and only takes a few minutes to fine tune. For example, say you want to spend 10% less than ESPlanner’s “ceiling” for the next 2 years, then 5% less until end of life. To do this, keep the Standard of Living at 100 for 2 years, then raise it slightly to say 110 for several years, then raise the SOL again to 200 or higher during the last few years of life. The exact numbers will vary depending on your specific profile, but this should get you in the right neighborhood. Each year, you can adjust the safety factor again as you wish.

Best,
Brian