How much to tip in Brazil, Argentina and Paraguay

Direct answer: At the Triple Frontier, tipping customs change by country. In Brazil, a 10% service charge usually already appears on the restaurant bill (optional by law, but customary to pay). In Argentina, a tip of about 10% is NOT on the bill and is customary to leave in cash. In Paraguay, it's around 10% and not always included. In bars, cafés and taxis, tipping is always optional.

Brazil (Foz do Iguaçu)

Restaurants usually add a 10% service charge to the bill. You can pay it, adjust it or decline (it's optional). In other services it's not required.

Argentina (Puerto Iguazú)

The tip is not on the bill. It's customary to leave about 10% in cash (pesos are best) for the waiter. The same goes for hotels and tours.

Paraguay (Ciudad del Este)

About 10% at restaurants; check whether it's already on the bill. There's no tipping when shopping.

Tip

Carry change in the local currency for tips where they're not on the bill. To pay for meals, see how to pay on each side and where to eat.

Source: tipping customs at the Triple Frontier (Marco Três editorial observation).