why did google hotel ads abandoned commission model?

Google announced the phaseout of its commission-based bidding models—Commissions (per stay) and Commissions (per conversion)—in February 2024, stopping new campaign creation in April 2024 and fully deprecating active campaigns by early 2025.

The decision was driven by a combination of technical tracking limitations, operational overhead, shifting risk models, and a broader strategic push toward automated, algorithmic bidding.

1. The Breakdown of Long-Window Tracking (Privacy & Cookie Changes)

Google’s official stated rationale centered on privacy standards and the deprecation of third-party tracking mechanisms.

• The Problem: The "Commissions (per stay)" model required tracking a user from the initial click to booking, and then maintaining that attribution record until the guest actually checked out—often 3 to 9 months later.
• Browser Restrictions: Strict browser privacy frameworks (such as Apple’s Safari ITP, Firefox tracking protection, and evolving global privacy regulations like GDPR and DMA) degraded long-term cross-site attribution. Deterministically linking a stay completed in October to an ad clicked in March became increasingly unreliable without persistent identifiers.

2. Operational Overhead and the "Reconciliation Nightmare"

Unlike standard digital advertising where billing happens immediately post-click or post-event, the pay-per-stay model functioned like an OTA:

• Manual Bookkeeping: Hotels had to submit monthly reconciliation reports to verify which bookings resulted in actual stays and which were cancelled, modified, or recorded as no-shows.
• Disputes and Delays: Hoteliers frequently missed upload deadlines, leading to automated invoicing on uncompleted stays. This created constant administrative friction, billing disputes, and support overhead that clashed with Google’s automated, self-serve advertising infrastructure.

3. Transferring Financial Risk Back to the Advertiser

Commission-based bidding forced Google to assume inventory risk:

• If a hotel’s website had poor conversion design, high room prices, or poor availability, Google displayed their ads, drove user traffic, and absorbed the search real estate cost while earning $0 if the guest didn't book or later cancelled.
• By phasing out commissions in favor of Cost-Per-Click (CPC) and Target ROAS (tROAS), Google shifted the conversion risk entirely back to the hotel. Google gets paid for the ad engagement, regardless of whether the hotel’s checkout engine converts the shopper.

4. Unification Under Google's AI & Smart Bidding Engine

Google has systematically consolidated its disparate ad products into standard, machine-learning-driven bidding frameworks:

• Instead of running a specialized travel-only commission ledger, Google wanted hotel advertisers using the same core Smart Bidding infrastructure as retail, e-commerce, and lead generation.
• Target ROAS (tROAS) and Performance Max for Travel Goals allow hotels to set an efficiency goal (e.g., target 800% ROAS, equivalent to a ~12.5% effective commission/distribution cost). The algorithm adjusts bids at auction time based on user signals, but bills the hotel on a standard click basis.

5. The Model Had Already Served Its Purpose

Google originally introduced pay-per-stay in 2017 and expanded it aggressively during the 2020–2021 pandemic when travel uncertainty was at its peak. At the time, hotels were hesitant to risk upfront cash on ad clicks due to mass travel cancellations, making zero-risk commission bidding crucial to lure independent properties and regional chains into Google Hotel Ads.

Once international travel fully recovered and Google had captured the vast majority of hotel metasearch volume, the risk-free incentive was no longer needed to maintain inventory liquidity.

What Replaced It?

Hotels running Google Hotel Ads are now required to use one of the following models:

• Target ROAS (Smart Bidding): The default recommendation; you set your desired revenue-to-spend ratio, and Google bids auction-by-auction to hit that target.
• Performance Max for Travel Goals: Automated asset bundling across Maps, Search, YouTube, and Hotel feeds.
• Manual or Enhanced CPC: Traditional bidding where you pay per click directly into your booking engine.