Tipping habits and amounts are pretty much the same in Vienna as elsewhere in major western cities.
So, for example, tip porters, taxi drivers, waiters and waitresses, hairdressers, and anybody who fixes anything in your apartment. And it’s customary to leave a tip for hotel cleaning staff in your room when you leave.
There are no hard and fast rules, though, and it’s difficult to offend (but see below). The only people you really must tip are taxi drivers and restaurant or bar staff.
Tipping in restaurants
See also: Ordering and paying in restaurants
Service is very rarely included in restaurant and bar bills. So if you don’t tip, it’s considered a sign that you were very dissatisfied. However, it’s just not done to not tip anything. A smaller tip? Fine as an expression of your disappointment. No tip? Not cool at all.
When tipping serving staff, normally add 5% to 15% to the bill so it’s rounded up to a convenient number. So if the bill is 9 Euro, round up to 10. If it’s 25, round up to 27 or 28. It’s flexible.
In cafes, bars and restaurants, you pay the tip in the initial amount you hand over. So don’t pay the bill and then leave behind some change or give back a note.
When you hand over your money state the amount you’re paying. So when the waiter says, “six euro eighty”, you hand him a 10 Euro note and say, “seven fifty” or “eight”.
(The same principle applies to taxi drivers.)
If you’re paying by credit card, you can ask to add a tip to the total, or pay the bill and hand over some coins or notes as the tip.
P.S. Don’t worry about doing the wrong thing – staff are used to serving non-Austrians and should give you a little leeway in terms of understanding and following local habits!