Originally Posted by ready53
When you input your projected annual spending in FIRECalc, is that amount after tax?
Nope. FireCalc does not factor in taxes, you have to estimate tax impact yourself. IOW you have to allow for taxes in your spending along with everything else.
There are too many variables to build in taxes, especially for 20-40 year planning periods, and you'd have to be able to predict future tax rates/thresholds/deductions - no one could possibly do it.