I’m not sure sales tax excluded from prices is a matter of vigilance if it’s a nearly-universal national norm. It’s a bit like someone from the US complaining about being charged for bottled water at a restaurant in Spain after assuming they’d receive free tap water.
To me personally it's weird. I come to shop with $5 but I don't know what I can actually buy...
The obvious exception is for marketplaces that sell to other markets. For instance, the prices on Amazon.de (Germany) change if a Swiss shipping address is entered due to the different VAT rate.
I hate to stereotype but I've found Germans in my experience to take particular offense to this practice. I'm married to someone from the UK and British people complain about this as well but probably only 1/10 as much. I feel like if I asked most Germans their least favorite thing about the US this is would be the MOST common response. I don't get it.
You may be fine with it if you live there and have learned to instinctively add 9% - but to a foreign traveler, one doesn't even know what percent they should add! _Of course_ it's annoying.
P.S. I am not German.
edited to add: It's just like the insane tipping culture in US. If you don't tip, somehow _you_ are the monster. It's not a problem that restaurants don't pay a living wage, it's not a problem that they don't even have to pay the minimum legal wage (!!!) - no, the problem is not with America. It's with the monsters that don't tip, because how else are those poor servers going to survive? Basically, when you look at the price in a US menu, you have to remember that the real price is at least 130% of that. And somehow, americans seem to be fine with it, and consider that it's the foreigners that are the oddballs here.
Do note, I don't have a problem with tipping, and I do tip even in my country, quite generously so sometimes (e.g. 50% at barbershops because I feel their prices are just too low, and also the person providing the service is actually doing most of the work too). But I don't like being forced to do it. It's one thing to tip as a sign of "thank you, good job!"; and it's a completely different feeling to tip as "here, this will give you something to eat this month"
Are there "service charges" too? :)
Either this or the Imperial units.
A few percent higher prices aren't as much of a deal when paying with credit card, the transaction works exactly the same, but when paying cash, it might look very different (up to "don't actually have enough with me. oops.")
That's kinda funny to hear, as these hilarious comedy clips have been some of the most popular on YouTube the last months:
German Learns about U.S. Sales Tax - https://www.youtube.com/watch?v=9CYokP6YIKw
German learns about Tipping in the U.S. - https://www.youtube.com/watch?v=rEQhA-JJlH0
Both are worth a watch, just 1 min each.
