Rate parity is a contractual agreement in the hospitality industry requiring hotels to maintain consistent room rates across all distribution channels (e.g., their own website, Expedia, Priceline, Booking.com). It ensures price consistency for consumers, preventing undercutting by hotels, but often restricts them from offering cheaper direct rates.

Key Aspects of Rate Parity 

• Wide Rate Parity: The hotel has to keep the same price everywhere — on its own website and all travel sites — so you’ll see the same rate no matter where you book.
• Purpose: Primarily used by OTAs to ensure they are not undercut by the hotel, while providing price transparency to consumers. 
• Scope: Covers room rates, availability, booking terms, and cancellation policies.

Travel agents and closed-user group (CUG) booking engines: Travel agents and closed-user group (CUG) booking engines bypass rate parity by using non-public, negotiated, or bundled rates that do not violate public-facing price restrictions. These include opaque inventory, exclusive membership discounts, commission rebating, and opaque wholesale rates, which are not listed on public sites.

• Closed User Groups (CUGs): These require users to log in or be part of a specific group (e.g., loyalty program, employee discount site), making the price non-public and not subject to standard rate parity laws.
•  Wholesale/Net Rates: Travel agents often have access to "net rates" from consolidators or wholesalers, which are lower, non-transparent rates.
• Commission Rebating: Agents can legally offer a lower final price by taking a portion of the commission they would normally earn from a hotel or cruise line and applying it as a discount to the client.