My average commute is 15 miles each way. For a 5 day work week (not counting oncall trips due to failed hardware), that's 150 miles a week. I have a Jeep Wrangler that gets about 15 miles per gallon - but it's paid for (no car payments) - so that's roughly 10 gallons of gas per week. At $3.80 (in Minnesota) my average fuel bill is $38.00 per week. There are 4.33 weeks in a month, so I can expect to spend no less than $164.54 a month on gas just for work. The annual cost would be $1,974.48.
If I didn't use the car for anything else, I could factor in the maintenance costs, but since I do use it for other things, the only expense I can legitimately use is fuel.
I can save some money on laundry, but that is pretty much peanuts. And besides I know technical people that don't know you are suppose to wash your clothes (and body) occasionally. So, we cannot deduct that.
Sitting around my home office in my underwear (or nothing at all) is not a deductible expense - a nice perk for some people, but not an expense.
So, bottom line, the savings are a little less than $2,000.00 a year. I could, therefore, only justify a 2% pay cut. Forget it.