no it's not required but I can afford to tip so I do and that makes me better than people who don't ;)

I tried not tipping on a US visit. You can get away with it, but people will be angry.

It's just a silly local custom you have to put up with when in America.

If you're sitting down at a table having a meal with a waiter who is taking your order and bringing you your food then yes, 15-20% tip is strongly encouraged. If you're going into a place where you order your food at a counter and pick it up yourself to take to your table or back to your home then tipping is not necessary.

Honestly dude if you cant afford to tip. You have no business eating out in america. As a former tip worker, ya they us about 5$ an hour BECAUSE the workers make up for it in tips. and thats a big IF. theirs no obligation on the employer to make sure that they actually come up positive. and Ultimately if you dont tip because you dont agree with tipping? You just forced one of the poorest members of our country to serve you for literally 3$ which quite honestly? kinda makes you a piece of shit if you do that.

Others have answered the question, but I did want to mention - many people mention that tips are important because employees can be paid below minimum wage, but this varies state by state, and in my experience tipping is standard regardless of this.

Here's a table of minimum wage by state:

https://www.dol.gov/agencies/whd/state/minimum-wage/tipped

The "Minimum Cash Wage" column is the "tipped" minimum wage - this is what employers can pay for jobs that get tips. The "Basic Combined Cash & Tip Minimum Wage Rate" is the minimum wage for non-tipped jobs, as well as the minimum a tipped employee must receive in wage plus tips - if they don't make enough tips, legally the employer must pay the difference.

So for example, in Washington state where I am, the minimum wage is $15.74 whether you're tipped or not, but it's still considered rude not to tip, and 20% is still the standard "good" tip.

You don't technically have too by law but if you decide not too... you should know the server will likely be irate to the point of secretly wishing you dead. I highly recommend leaving a tip or just don't eat out. Order the food for take out and just pick it up at the counter, but do not expect someone to be super happy that they just served you for basically nothing.

OP is probably American and trying to start a discussion. Just accept it as how things are done here and move on. It's really not that bad if you expect it