1. The short answer
They are two different kinds of money. A tip (or gratuity) is a voluntary amount you choose to give, and under U.S. federal labor law it belongs to the employee. A service charge is an amount the restaurant adds itself, so it is the restaurant’s revenue — whether any of it reaches your server is up to the owner, unless a state law says otherwise.
That gap between what customers assume and what actually happens is why service charges generate so much frustration. You pay extra expecting to reward the person who served you, and the money may never reach them.
2. What federal law says
The Fair Labor Standards Act draws a clean line: a tip must be voluntary, decided by the customer, and free of a required amount. The moment an employer sets a compulsory charge — even one labeled “gratuity” or printed on every large-party check — it stops being a tip in the legal sense and becomes part of the house’s receipts.
The tax side makes the distinction practical, not academic. Since 2012, the IRS has treated compulsory automatic gratuities (the classic 18% added for parties of six or more) as wages rather than tips, which means they go through payroll like ordinary compensation. Many restaurants responded by renaming the line “service charge” — same fee, different label, and no guarantee for the server either way.
A handful of states add their own rules on top. Some require disclosure of who receives a mandatory charge; others restrict employers from keeping charges described as gratuities. The details vary, so the reliable habit is to treat every service charge as house revenue until you ask.
3. Why restaurants use service charges anyway
From the owner’s side, a service charge is flexible in ways tips are not. Tips traditionally flow to servers and bartenders; back-of-house staff — cooks, dishwashers, prep teams — have historically been excluded or limited. A house charge can fund kitchen pay, benefits, or simply margins without restructuring anyone’s wages.
The trade-off lands on the guest: most people read “service charge” as “tip already paid,” and surveys of worker discussions suggest servers frequently absorb complaints when the charge quietly bypassed them. Neither party chose this design — the receipt wording did.
4. Decode your receipt in 10 seconds
Scan the line items and sort each one into one of two buckets:
- “Gratuity” / “Tip” — customer money that goes to staff. If it is already on the bill, do not add another tip on top.
- “Auto gratuity” / “Automatic gratuity” / “Service charge” / “Administration fee” — house revenue by default. Ask where it goes if the answer matters to you.
- “Wellness fee” / “Kitchen appreciation” / “Core surcharge” — house revenue with better branding. Tipping on top is optional generosity, not an obligation.
- “Delivery fee” / “Service fee” on delivery apps — platform revenue. Your driver typically lives on the separate in-app tip.
5. What to do, politely and effectively
Before ordering, menus in most states must disclose mandatory charges — a ten-second glance at the menu fine print beats a surprise at checkout. If a service charge appears only on the final bill and was never disclosed, you can reasonably ask for it to be removed; managers usually comply rather than argue.
If you want the money to reach your specific server, the direct route still works best: ask “does the service charge go to the staff?” It is a normal question, servers hear it constantly, and the answer tells you whether to add a real tip — ideally calculated on the pre-tax subtotal, not on a total already inflated by the charge itself.