Switch to canned soda or buy generic bag-in-box syrup from a restaurant supplier to lower a beverage cost that sits above 40 percent. If your guests rarely order soft drinks and your staff consumes the majority of your supply, keeping name-brand fountain soda on draft is an expensive perk.

When staff drink the profits

A typical 5-gallon bag-in-box (BIB) of a major cola brand costs around $141. That yields roughly 3,840 ounces of finished soda, making your cost $0.59 for a 16-ounce glass with ice. If you charge $2.99, your direct beverage cost is 20 percent.

The math breaks when you run a restaurant with an older clientele and a high average check, like a $25 lunch or $37 dinner. Guests drinking wine or water leave the soda to the staff. If your team drinks three glasses for every one sold, that $2.99 sale now carries the cost of four glasses, or $2.36. Your beverage cost spikes to 79 percent. Even blended across all drinks, a 42 percent beverage cost points to staff consumption eating the margin.

Buy canned soda for the team

You can separate staff drinks from guest sales by moving to cans. A 12-ounce can from a warehouse club costs about $0.55. That matches the cost of pouring a 20-ounce fountain cup, but it removes the unlimited refills.

Staff still get a morale boost, and you control the inventory exactly. A can is easy to count at the end of the shift. If a guest orders one, you still make a 150 percent markup selling it for $3.00, keeping your margin near 62 percent.

Switch to generic syrup

If you want to keep the fountain, drop the name brand. A generic 5-gallon BIB from a local restaurant supplier costs around $50, compared to $141 for the major label.

The generic syrup drops your cost to $0.21 per 16-ounce glass. Even if staff drink three glasses for every one sold, the total cost for those four glasses is $0.84 against a $2.99 sale. That drops your cost on that transaction to 28 percent. The taste difference is rarely noticed in mixed drinks, and you keep the low-friction staff perk.

Offer profitable alternatives

If you serve an older crowd, sugar-heavy fountain drinks do not sell well anyway. You can offer Italian sodas by mixing soda water with flavored syrups. A pump of sugar-free syrup in carbonated water costs pennies and looks premium.

You can also treat the high soda cost as a strict operating expense. Keeping the staff active and hydrated with free drinks reduces turnover. Training a new waiter costs far more than the $4,000 a year you might spend on staff sodas. If the restaurant is profitable overall, a 42 percent beverage cost is a manageable price for a happy crew.