Word or phrase that means making use of money already committed to that purpose

I recently bought a gift card for an online shopping account, and though I have registered the card with the account, I have yet to actually buy anything with it. Thus right now I have money sitting in my account, ready to be expended, and already committed, in the sense that though I haven’t purchased any goods, I have already purchased them – since the only direct purchase involved in all of this (that of the gift card) has already been made.

Say it’s been a year since my purchase and the money is still sitting in my account unused, and I’ve been itching to use it up, since I already paid. What would fit the blank if I framed my sentence thus? “I want to _______ the money I have on that account.”

I’m looking for something a bit more sophisticated than “make use of” – maybe even jargonistic, if such jargon exists (say in finance, business, etc.).