mailbox rental cost
1 In most cases, the cost of a UPS mailbox rental is going to depend on your geographical location and the size of your mailbox. 2  On average, the longer you commit to a mailbox, the more you are going to save. Premium services can include faxing, mail forwarding, and text alerts when mail or a package has arrived. 2  Of course, every year you are going to have to renew your mailbox. 3  A non-refundable fee of $10 to $15 may be charged for the mailbox key. 4  If mail is excessive, you may be charged a surcharge.