I can see how it might be considered barter income for each of us since this is the corresponding option that involves actual money:
We hire her to do that work and pay her for it. Then she turns around and uses that money to pay part of her rent. In that case, the payment from the LLC to her is miscellaneous income for her and a business expense for the LLC since we're paying for labor to make the improvements to the rental property. Her rent payment from her to the LLC is income for the LLC and a personal expense for her.
However, I think it's just a gift if you look at it this way:
We charge her lower than market rental rates simply because we want to give her a chance to build up some savings (we definitely want this to happen!). She does painting, etc., because she wants the place she lives in to be nicer. If she waited for us to do the work (we would do all the work ourselves instead of hiring a handyperson), she would have to wait quite a while because we can't be there very often to do that work.
This is more like giving her money from our personal funds (not from the LCC's assets) to help pay her rent if she were renting from someone else. Since the annual exclusion on gifts is more than the amount she is not paying, there isn't a tax liability.
Any comments on this approach to considering tax liability or not?
Perhaps we should actually give her a check from our personal checking account each month (a gift), so she can pay a "market rate rent" amount to the LLC. Any thoughts on that idea?