insurance usps cost depends on the value of the item being shipped. USPS offers insurance for both domestic and international packages. The cost for USPS insurance starts at $2.45 for items valued up to $50, with prices increasing depending on the value of the package. Higher-value items can be insured for up to $5,000 with additional costs. Customers can add insurance when purchasing postage online or at the post office, and it’s especially useful for protecting valuable or fragile items.