[kristofferR]

I've never heard about anyone tipping taxi drivers before, seems like a weird thing to do. Is that actually common in the US?

[ghshephard]

I could never convince my US colleagues that you don't have to tip taxi drivers in Singapore 20%. They were actually incapable of not tipping, so ingrained was the habit in the US.

[idiot900]

Very common. In NYC for example there is a social institution that taxi drivers are tipped.

[DominikR]

In Austria (Europe) this is common too.

[tormeh]

But not in Germany, though. In norway, tipping is something you only do at restaurants (not in taxis or other places).

[syntheticnature]

Interesting. I had a taxi driver in Hamburg bitch at me for the whole ride that Americans don't tip and why don't they tip?

So, that was the one taxi ride in Germany I took and didn't tip. (It was not the first taxi ride in Germany.)

[tormeh]

Maybe there's an east-west divide? My experience is with Berlin.

[syntheticnature]

Looking at a few sites this morning, it sounds like it's typical to round up to the next Euro in Germany, and that tipping more than 10% might be seen as offensive (unless of course you are hoping to get some extra from an American).