As part of my company's business, I and my staff travel locally to our main customer headquarters for meetings and technical support, and we submit and are reimbursed for travel expenses (miles in a personal car, parking fees), where if we start or end travel to the alternate site from home, we subtract normal commuting miles to our own office. The customer facility is approximately 30 miles from our facility.
My employer travel office notified me that one of my staff just exceeded 35 such trips this year combined with travel to the customer's site last year, and therefore the customer's facility is an indefinite alternate work site, and all previous reimbursements this year and any future trip reimbursements are now taxable income for this year for the staff member, and the taxable income from the prior trips will be added to his next pay stub, with additional taxes withheld.
The employer interprets that if any part of the trip to the customer's facility started or ended from the staff member's house and the staff member is reimbursed, this is now taxable. I interpret the tax law differently and would like some clarification. I interpret the trips count toward the 35 annual trip minimum to designate the alternate work site as an alternate work site if and only if the main work site is not visited that day, that is, the staff member spends a full day at the customer's site, starting from home, to the customer's site, then returning home. My employer interprets that only one leg at home to/from the alternate site is required, that is, if the staff member starts from home, goes to the customer's site for 2 hours, then comes back to our office for the rest of the day before going home, or alternatively starts from home, comes to our office for 6 hours, then goes to the customer's site for the rest of the day, then goes home from there, that these also count toward the 35 trip minimum resulting in taxable reimbursements. I disagree as mentioned.
In addition, we are not conducting "office work" at the alternate site, per se. We have no desk, no phone, no computer at the alternate site. We primarly attend meetings and provide technical expertise and guidance. Therefore, I also question why any such trips even beyond a one-year period are considered working away from the tax home.
Before I register my disagreement, I would like some insight as to which interpretation is correct for the alternate work site (only if there a full day as I claim or a partial day as the employer claims). Also, is visiting a client or customer considered working at a temporary alternate work site?
I'm looking at Pub 463, section 4.
I myself have not been subject to this issue since I always travel from our office to the alternate site and back to the office, which apparently never triggers the alternate site an indefinite alternate work site.