"Carlson’s spending rate is estimated to be 3%. With an inflation rate of 2%, Carlson’s after-tax return requirement is equal to [(1.03 × 1.02) – 1] = 5.06%. Given a tax rate of 25%, Carlson’s before-tax return requirement is equal to [5.06% / (1 – 0.25)] = 6.75%. "
Thank you for this post, I was literally just thinking about this and couldn’t find my notes. I remember that one always came first, inflation, or taxes, and couldnt remember which. TBH I still don’t really understand the logic but I’m just gonna remember “IT”
In schweser class, I was told that adding the inflation at last. IPS’s return is just an approximation – yes, you aren’t taxed on inflation, but you’re taxed on any realized gains. OP’s first post is a valid solution. My vague memory tells me that CFAI answers to this kind of questions are not always the same, either. All answers from old IPS questions, EOC and schweser’s are acceptable.