Customer reveals trick for leaving the perfect tip every...

A restaurant customer has revealed a trick for leaving the perfect tip every time - but others are not convinced. TikTok user Alex Newnam, from Kentucky, shared a quick and easy hack to help calculate a tip without the hassle of a calculator. However, people chimed in and called her out for an error she made in her speedy method.

Image Credit: Mail Online [However, users called her out and said never to tip on the post-tax total because service employees are taxed on their tips]

'Next time you guys go out to eat, don't get your calculator out, I'm going to teach you a trick,' Alex started her video while holding a restaurant check. The content creator, who shared the post with her over 180,000 followers, then zoomed in on her check, pointing to the $64.93 total.

'To get a 20 percent tip,' Newnam explained, 'All you need to do is take this decimal point and move it one place to the left.'. She used her finger to demonstrate moving the decimal in her total to the left so it sat 'between the tens and ones.'. By doing this, it will show you 10 percent of your total.

'Now you're looking at approximately $6.50. That's 10 percent. To make it a 20 percent tip, double it. So you'd be leaving a $13 tip,' she continued. TikTok user Alex Newnam (@alex_newnam), from Kentucky, shared a quick and easy hack to help calculate a tip without the hassle of a calculator.

Alex said by using her trick, you'll 'never need a calculator again.'. Though this may seem like the right way to tip and what many have always done, commenters quickly revealed a problem. 'Don't tip off the total as that includes tax. You tip off the subtotal,' someone wrote.

'Tip the sub-total, not the total,' a second advised. 'Why would you tip on the tax??' a user asked. Another chimed in: 'Nope! The tip should be calculated before the tax is added in.'. 'But you are tipping on tax too with that method,' a fourth commenter observed.

In the video, Alex performed her trick on the bill's total which means the tax is included. However, users called her out and said never to tip on the post-tax total because service employees are taxed on their tips. Though by using this method you're still tipping, the IRS states both cash and non-cash tips are considered income and subject to federal income tax.

So the employee would take home less. Others used the comment section to express how they do - or don't - tip service workers. '20 is too high. 15 used to be a high standard!! Never giving 20 percent to carry food to a table,' one comment read. 'I tip a standard of 15 percent. 20-25 percent is reserved for something stellar and extraordinary,' another said.