A call-out charge is the fixed amount some tradespeople charge for coming out to the job, on top of labour and materials. Sometimes it is charged even if nothing is done in the end.
It is a legitimate item if you are told beforehand. The problem comes when it appears on the invoice without having been mentioned, or when it is added to another charge for attending or visiting that in practice is the same thing.
Always ask beforehand whether there is a call-out charge and whether it is deducted from the job. With us you get a fixed quote before we start, stating everything you will pay, and if the job changes once we check on site, we tell you and do not carry on without your go-ahead. More under emergencies.