is now 
Consumers debate about how much they should tip a server at a restaurant with the general understanding that an average 10% to 15% tip indicates the service was good and up to a 20% tip indicates it was exemplary. As the food and service bill total is tallied, they usually don’t consider that the employee will be paying taxes on the tips.
IRS rules require restaurant employees to report their tips daily from both cash and credit or debit card payments. Restaurant employees and employers must both pay social security and Medicare taxes on the tips, and the employee must pay income taxes on them just like other wages.
Employers are required to ensure that the total tip income reported by employees is at least equal to 8% of total receipts collected during each pay period. The rules generally apply to food or beverage establishments with 10 or more employees. So, when a restaurant customer leaves no tip for a server, it can cost that employee and the entire wait team more than embarrassment.
