Start with the cost drivers
Corporate tasting pricing is shaped by guest count, tasting format, host time, wine selection, glassware, food, staffing, venue, delivery, and the amount of planning the room requires.
A 15-person office tasting and a 120-person holiday reception may both be called wine tastings, but they are different service problems and should not be compared as if they were the same package.
Separate the wine budget from the event budget
The bottle list is only one line in the plan. A serious proposal should show what is included for hosting, setup, glassware, food, staffing, delivery, cleanup, and venue coordination.
If premium bottles, a private room, catering, permits, or insurance documents are needed, those should be named as assumptions instead of appearing as surprises later.
Ask for a quote that can survive approval
The most useful proposal includes the format, guest range, timing, price, payment terms, open dependencies, and next decisions.
Share the event shape early, even if the exact date or venue is not final. A range is enough to identify the right format and the questions that affect budget.