The tipping norm for all orders — takeout or dine-in — remains firmly at 20%.

In general, takeout tips should be between 5 and 10% of the total bill before any discounts or promotions. If you are able, tipping up to 20% can help struggling servers make ends meet. But it is not required or expected that customers will tip the same for takeout as they would for dining in.

Charny says you should aim to tip 5% to 10% for takeout. When you dine at a sit-down restaurant, you should tip 18% to 20% of the bill on average. But when it comes to takeout, Charny says you don't necessarily have to give the full 20% you would tip on a meal eaten inside the restaurant.

What the etiquette expert says: Just like at coffee shops, tipping on takeout orders is optional, says Orr. "There isn’t an expectation that you tip since you haven’t [received]." If you're paying with cash, you can always round up or leave some change as a gesture of good will, but that's totally your call.