Abstract
This is a preliminary study that investigates the effect of the expansion of a bundled holiday package on tourists’ extra expenditure. From a theoretical perspective, tourists acquiring packaged holidays tend to incur extra expenditure while on vacation and, in turn, to set a mental budget to avoid overspending. Findings from a quasi-experiment show that tourists are setting the same mental budget for extra expenditure regardless of what is included in the bundle on offer. Resort managers should carefully design mixed-product bundled holiday packages, leaving aside some attractive but non-essential options.