overcharge
o-ver-charge
verb
To ask for or charge an unfairly high price for goods or services.
"The mechanic tried to overcharge me for the repair."
noun
An amount of money that is too high for goods or services provided.
"I found an overcharge on my electricity bill."
Thesaurus
Synonyms: surcharge, overload, pluck, soak, hook, rob, gazump, plume, fleece
Antonyms: undercharge