In restaurants a service charge of 10%–15% may appear on your check, but it’s not a given that your server will receive this; so you may want to consider leaving a tip of 5%–10% (in cash) for good service. Tip checkroom attendants €1 per person and restroom attendants €0.50 (more in expensive hotels and restaurants). In major cities, tip €0.50 or more for table service in cafés. At a hotel bar, tip €1 and up for a round or two of drinks.
Italians rarely tip taxi drivers, which isn't to say that you shouldn't. A euro or two is appreciated, particularly if the driver helps with luggage. Service-station attendants are tipped only for special services; give them €1 for checking your tires. Railway and airport porters charge a fixed rate per bag. Tip an additional €0.25 per person, more if the porter is helpful. Give a barber €1–€1.50 and a hairdresser's assistant €1.50–€4 for a shampoo or cut, depending on the type of establishment.
On sightseeing tours, tip guides about €1.50 per person for a half-day group tour, more if they're especially knowledgeable. In monasteries and other sights where admission is free, a contribution (€0.50–€1) is expected.
In hotels, give the portiere (concierge) about 10% of the bill for services, or €2.50–€5 for help with dinner reservations and such. Leave the chambermaid about €0.75 per day, or about €4.50–€5 a week in a moderately priced hotel; tip a minimum of €1 for valet or room service. In an expensive hotel, double these amounts; tip doormen €0.50 for calling a cab and €1.50 for carrying bags to the check-in desk, and tip bellhops €1.50–€2.50 for carrying your bags to the room.