I answered other. Taxes by a long shot are my biggest expense.
My first thought was you must be freaking rich. But our combined Federal plus (CA) State income tax for 2021 is around $10K. I suppose if we add sales tax, gas tax, etc, yes, taxes were our biggest single expense. - CNC
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I am not filthy rich but am very comfortable. I live in Texas so high property taxes are a given, mine are about $8K per year, toss in sales tax for another couple thousand a year and around $10K goes to state and local.
The big hitter is federal. I have a good baseline income with SS, Pension, interest income, and a few other things, but whatever that total is, I do a Roth conversion to bring me up to the near top of the 24% bracket. For 2021 and single, that bracket max is $164,925 with an associated tax of $33,603. So that is $43K per year to fed, state and local. I live a pretty simple and low cost lifestyle so that $43K for taxes is more spending than everything else combined.