I parked in front of the building and the cost was $25 for the event we got out around 11:30pm you just have to pay when you enter and keep the ticket to use on the machine on your way out to exit after the concert.
There are several places to park in the garages around capitol one, it is usually $20.00 they are only a couple of blocks away.
It varys whether or not you actually park in the arena or you park at another parking garage outside$ 15-40 hope this helps.
Your best bet is to park in the adjacent lots around cap 1. Right at the stadium is more expensive and other lots a walking distance. I use parking panda app which finds spots and let you reserve at a lesser price than just driving up
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