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Hybrid till / single till
What it is
How non-aeronautical revenue is treated when setting airport charges. Under single till, all revenue including retail and real estate offsets the aeronautical tariff; under hybrid till, only a share does, so tariffs are higher
PPP airports operate on hybrid till and AAI airports historically on single till
Impact on industries
- Hybrid till lets the operator keep most retail and property upside, which is what makes airport privatisation commercially attractive
- Higher aeronautical tariffs improve the return on terminal and runway investment, supporting capacity expansion
- Passengers and airlines pay more - user development and passenger service fees at privatised airports have risen steadily and feed into fares
- The choice is a policy allocation between airport investors and air travellers, and it has been contested since privatisation began