Same transaction, same rate
When you add a tip on a receipt or terminal, the merchant adjusts the final charge.
The whole amount, including the tip, carries the merchant's code.
The pending charge may show the amount before the tip. The posted charge includes it.
Separate tips
Tips paid in a delivery or rideshare app are part of that app's charge and earn its rate.
Tips sent through a payment app go to a person, not a merchant. They can carry fees and are sometimes treated as cash-like.
Cash tips earn nothing.
Service charges
Automatic service charges and delivery fees are part of the merchant's charge and earn the same rate.
Bonus categories apply to the full amount, including tax.
Caps count the full amount too.
