https://www.arin.net/fees/pending_fee_schedule.html
Not sure I dig it, they said it would reduce costs, but that's not entirely true. The entry cost is reduced, so for a Small you get charged 1000, then if you have 16 /24's your annual fee is 1600 dollars. I'm guessing the minimum annual fee is the initial fee as well.
Also those of us with /32 IPv6 allocations will be charged more if we dont give up a peice of it and turn it into a /36.