100% off the top. It does not make sense to tax someone on money they never got. Doctrine of "Constructive receipt" applies in my opinion, which states that you should only be taxed if you receive the money.
Similarly, I personally cannot stand when a recordkeeper rolls up the loan fee into the loan balance. $5,000 loan, person gets a check for $4,900. You're making them pay interest on the loan fee, and taxes if they default? That's not right.