When people calculate their WR, do they include the MER of their portfolio? At .3% MER and a portfolio size of 750K$, that's 2,250$ per year. That's more than I spend on living cost a month!
Yes, you absolutely need to count in your ERs. If you are targeting a 4% WR, and have 0.1% ER, you should take out 3.9%.
The 4% rule, at least in regards to the Trinity Study, already has expenses built in. In fact, they built in an assumed expense ratio of 1%. As such, if you expected to pay 0.1% in expense ratios, your SWR would actually be 4.9%. MMM wrote an article about it around here somewhere, the gist of which was that 5% is probably a reasonable SWR.
I'm gonna need a citation on that, cause everything I can recall is that the trinity study didn't take into account any ER, like I said, and the ER will reduce your SWR.
IIRC, the trinity study authors have mentioned that ERs vary so much that people need to take their own into account.
As far as MMM's article on the 4% rule, it's
right here, and while I didn't bother to reread the whole thing, I did a search on the page for "expense ratio" and the only time it came up was not in the article, but in the comments, where someone said the same thing I did: "The study does not include fees into the SWR calculations. ... At the lower end of the return spectrum, a 1% fee can have a big impact on the bottom line (SWR)." MMM replied, and didn't dispute that (just noted a 1% ER is high).
I'm quite confident that the Trinity study didn't take ANY fees into account, so you need to reduce your WR by your ERs. If you have evidence to the contrary, I'd love to be proven wrong, but otherwise don't want this misinformation to stand. :)
EDIT: Recently people like Pfau have said WRs going forward should be about 3%--and they DO include a 1% ER. Maybe you were confusing it with that? Either way, they net to the same thing--4%, but take off your ER, or 3% if you have a 1% ER. But don't think that 4% already takes into account a 1% ER and that the Trinity study was saying: "As such, if you expected to pay 0.1% in expense ratios, your SWR would actually be 4.9%."--that's simply not the case.