The cities and regions of Italy have varying programs for collecting hospitality tax.
It is paid in cash on arrival. Cash is required so that the owner can avoid paying income tax on the tax.
The local governments can change the amount rather suddenly, without advance notification to property owners and managers. This means that you may find that the tax amount when you arrive is slightly different than what you were quoted when you made a reservation. The property owner and manager has no control over the amount or changes, but needs to collect what the government mandates. You are required to pay the tax in force at the time you arrive.
The tax applies to the first 7 or 10 days of your stay depending on location.
This is our current information:
Rome Apartments: €3.50 Euros per person per day age 10 or older up to 10 days.
Rome Apartment Hotels, Via Aureliana and Janus: €4.00 Euros per person per day age 10 or older up to 10 days.
Florence: €3.00 Euros per person per day age of 12 year or older up to 7 days.
Sorrento: €3.00 Euros per person per day
Venice: €5.00 Euro per person per day age 16 or older, €2.50 ages 10-16, under 10 years free, for up to 5 days. (Increased effective immediately March 2019 with no advance notice.)
Tuscany: Varies by community, €1.50 to €2.00 per person per day is common.