If you are serving alcohol at an event in Washington, you will hear the word MAST. It stands for Mandatory Alcohol Server Training, and it is the permit that Washington requires for people who serve and pour alcohol. Here is what event hosts should know.
What a MAST permit is
A MAST permit shows that a server or bartender has completed state approved training on serving alcohol responsibly. The training covers checking identification, recognizing signs of intoxication, refusing service politely, and understanding Washington liquor laws. Classes are taught by trainers certified by the Washington State Liquor and Cannabis Board (WSLCB) and usually take about three hours, followed by an exam.
Class 12 and Class 13
There are two types of MAST permits:
Class 12 (mixologist): For people 21 and older. Allows the holder to mix drinks, pour from the tap, and do everything a Class 13 holder can do. At licensed establishments, at least one Class 12 holder must be on duty.
Class 13 (server): For people 18 and older. Allows the holder to take alcohol orders and serve drinks to guests, including pouring at the table.
For events, that usually means your bartenders need a Class 12 permit, and servers who bring drinks to tables or pour wine with dinner need at least a Class 13.
How long it lasts
A MAST permit is valid for five years. New employees of licensed businesses have 60 days from their hire date to get the correct permit, and staff must keep it readily available for inspection while working.
Why it matters at private events
Even at a private party or wedding, trained servers help protect your guests and you as the host. A MAST trained bartender knows how to check IDs, pace service, and step in gracefully when a guest has had enough. When you hire bartenders and servers, ask to confirm their permits are current.
What to look for when hiring
When you hire bartenders and servers for an event, ask whether everyone pouring or serving alcohol holds a current permit of the right class, and whether the team has experience checking IDs at busy events. A professional bar team will also have a plan for water, food, and safe rides when the night winds down.
Other permits to know about
The MAST permit covers the people serving. The event itself may need a separate license or permit depending on how alcohol is provided. Private, invitation only events where alcohol is free may use a banquet permit, while nonprofits selling alcohol at a fundraiser generally need a Special Occasion License. Your venue or caterer may already hold the license that covers your event, so ask early.
Our team
At Northwest Premier Event Staffing, we believe hospitality is a craft, and responsible service is part of it. Our bartenders and servers who handle alcohol hold current MAST permits, and our leads know how to keep the bar both welcoming and safe.
Need MAST permitted bartenders or servers for your event? Reach out through our Request Us form and we will help you plan your bar team.
