How much does a UPS business mailbox cost? UPS Mailbox Prices Small size boxes cost $10 to $30 per month, medium size boxes cost $20 to $40 per month, and large size boxes cost $30 to $50 per month.

Now, any package addressed to a P.O. Box or military address shipped through UPS will be refused and sent back to the sender. You can read more here. ©2025 Advance Local Media LLC.