USPS® offers three pricing tiers:
- Retail Pricing: What you’ll pay if you walk into your local Post Office or at USPS.com
- Commercial Base Pricing (also known as CBP): What you’ll pay with traditional shipping software.
- Commercial Plus Pricing (also known as CPP): The most deeply discounted shipping rates available.
Most shipping software offers either CBP or CPP rates with additional markup added on top, as well as monthly fees or per-label costs. Pirate Ship is 100% free, and all Pirate Ship accounts come with Commercial Plus Pricing® rates for all services, including Priority Mail Cubic®, with no markup or minimums.
Note that some services (such as First Class Package®) only have one pricing tier, so you may find that the rates for some services are the same no matter where you purchase them from.