How much the bartender or bartender service gets paid is often based on the following:
Hourly rate with a minimum number of hours per bartender Most often the hourly rate may be around $35 per hour with a minimum of four or more hours. A deposit or retainer fee is also usually required. Usually, the tips (if tipping is allowed) will be divided between the workers.
Number of guests The number of guests can help bartenders estimate how busy they will be and the effort required to satisfy those guests. In many cases, event organizers may need to hire additional bartenders, servers and bar backs.
Overtime If the bartenders are asked to work beyond the agreed upon hours they have the option of charging at an increased rate. Keep in mind that the bartender may not be able to work overtime and can refuse to work.
Supplies and equipment If the bartending service willneed to provide supplies such as glasses and the bar itself, those are additional charges that the event organizer may be expected to pay. If they also need to bring the liquor, beer, mixers, wine, ice and more, the bartender will usually charge for the price of the goods plus a fee.