overcharge
verb [ I or T ]
uk/ˌəʊvəˈtʃɑːdʒ/ us FINANCE, COMMERCE
to ask someone to pay more than the real price or value of a product or service:
The company denied it was using its dominant position in the market to overcharge customers.
overcharge sb (by) $10/10% etc. The shop overcharged me by €5.
Banks are able to overcharge because they have complicated tariffs that are difficult to understand.
overcharge for sth Some landlords habitually overcharge for insurance, building repairs, and services.
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undercharge verb
overcharge
noun [ C ]
uk/ˈəʊvəˌtʃɑːdʒ/ us FINANCE, COMMERCE
a request for payment that is more than the real price or value of a product or service:
They billed twice for internet services in the same year, resulting in an overcharge of $123,000.
He disputed what he believed was a $10 overcharge on a car rental.
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undercharge