What types of meal and entertainment expenses are 100% deductible on a business return?

Businesses can fully deduct the cost of:

• Office parties and outings held for the benefit of its employees (other than highly-compensated employees)
• Meals and entertainment provided to employees as compensation and reported as taxable wages

This includes things like free coffee, donuts, and snacks provided at the workplace, as well as onsite meals for employees working overtime.