hidden hid‧den [ˈhɪdn] adjective
hidden costs, charges etc are difficult to notice, for example because they are not included in the basic price of something:
• Make sure you're clear about what you are paying for, as there may be hidden extras.
• The current system imposes dozens ofhidden taxes on each enterprise.
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hidden UK US /ˈhɪdən/ adjective FINANCE
► used to describe costs that are not normally included in the original price of something, or are not normally considered when judging something: »
hidden charges/costs/extras
»hidden fees/penalties
»There are the hidden costs of climate change that we may not have to face until the future.
Financial and business terms. 2012.