The IRS is clear on their point of view. If you barter you must include the barter activity's fair market value as income on your tax return in the year the barter activity is performed. But is it really that simple? Here are some things to consider if you barter.
What is fair market value? The classic definition is the price someone is willing to pay and someone is willing to receive for the exchange of goods or services. But we all know this requires a level of judgement. What if an item is on sale when the barter activity is performed? Are prices always the same for a similar item or service? Prior to establishing the value of a barter item, shop around and take the lowest defendable value possible for your bartered item.
Example: You barter dog grooming for accounting work. If you offer a range of prices from $20 to $60 for your grooming service and a dog owner can readily get the same service done for $15 somewhere else…what is the fair market value? If you can reasonably substantiate the $15, this lower amount could become your fair market value.