overcharge
verb /əʊvəˈtʃɑːdʒ 
/ [with object]
/ [with object]1Charge (someone) too high a price for goods or a service: send your bill to the Law Society if you think you’ve been overcharged...
- Since then, we have had no problems though occasionally I feel he overcharges us.
- Consumers are painfully overcharged in all aspects of their business transactions.
- We have never felt we were overcharged for anything and have always gotten good value for our money.
Synonyms
swindle, charge too much, cheat, defraud, gazump, fleece, short-change, surcharge
informal rip off, sting, screw, soak, rob, diddle, do, rook, clip
North American informal gouge
British informal, dated rush
1.1Charge someone (a sum) beyond the correct amount: [with two objects]: customers have been overcharged £12 million in the last year...
- Consumers were estimated to have been overcharged by $480 million.
- Write to your bank and demand the money you believe you have been overcharged.
- Payments to customers included interest on the original sums overcharged.
2Put too much electric charge into (a battery): large generators can overcharge batteries...
- You gently overcharge the batteries to make sure that the weakest cells are brought up to full charge.
- A controller keeps the batteries from being overcharged, and an inverter converts DC electricity produced by the solar panels into AC electricity typically used by home appliances.
noun /ˈəʊvətʃɑːdʒ /
/An excessive charge for goods or a service: an overcharge of £40...
- The deal varies from oil reserves to an overcharge for goods and service to a secret fund discovered in government accounts.
- She'll eat a loss before handing over her driver's license to reverse an overcharge at Kmart.
- Tens of millions, at least, appear to be overcharges.