The world’s most unapologetically rich teenagers are heading back to school after a summer full of over-the-top partying in extravagant style.

From relaxing on private, million-dollar yachts to taking the Ferrari for a spin to the Hamptons, the Rich Kids of Instagram have been documenting each self-indulgent moment on social media.

Many of the images show just how much money they – or in most cases, their parents – have to blow: ‘Maybe this can work..’ wrote Alec Steinberg under a photo of his American Express credit card statement, which his father changed from having ‘no limit’ to a $500,000 limit in July.

Peter Brant’s jet-setting and party-hopping children, Peter Brant II, 18, and Harry Brant, 16, have spent most of their summer on a private yacht in Europe, and have documented each lavish moment on Instagram.

‘Going to miss this,’ Harry wrote on one last boat bragging image.

And while Ezra William, an NYU student with a love for Hermes Birkin bags, left his vacation in style getting a luxury hair treatment in Bali, David Walcher, the heir to Walcher Estate Jewels, spent his holiday learning the family business – and at times, buying 600carats worth of diamonds which of course, he posted on Instagram.

Before 17-year-old Marcus Adolf drove his BMW X3 to the Hamptons for the summer, he took his credit card for a spin at Saks Fifth Avenue in San Francisco – but not just any credit card.

Mr Adolf posted an image of his American Express Black Card on Instagram with the caption ‘shopping time!’ last month. The average cardholder has $16million in assets and an annual household income of $1.3million, according to the Wall Street Journal.

The teen also likes to show off his collection of Rolexes on the blog, and he’s not the only one.

New Yorker Cole Shneider likes to sunbath in hers, stacking three on one wrist. Meanwhile Anil Arjandas said he ‘needs to buy a new scale’ to weigh his growing Rolex collection, ‘as this one is just up to 1.5kg,’ he wrote on Instagram.

Lavish pools also feature prominently on the blog, with Max Leif and Jack Siebert posting images from the top of New York City penthouses and Mykonos, Greece, respectively.

Since 2012, the Rich Kids of Instagram blog has been chronicling the lives of uber-rich teenagers in a display of extravagant wealth.

The blog then spawned two E! network reality series: #RichKids Of Beverly Hills and “#RichKids of New York.

And last month the privileged youth took their shameless oversharing to another popular app – Snapchat.

Launched by a 17-year-old boy from the UK, Rich Kids of Snapchat uses a Facebook page to give a glimpse into the luxurious lifestyles of a group of teens and 20-somethings.

Whether using Instagram or Snapchat, the images of sports cars, private jets, luxury goods and lavish homes all use captions that revea the kids’ nonchalant attitude to money.

Last week the anonymous creator behind Rich Kids of Instagram released a co-authored novel based on the antics of the uber-rich teens on its blog.

Rich Kids of Instagram: A Novel explores the lives of a core group of spoiled young people – from a poultry-empire heiress to a media mogul’s driven daughter and an old-money rifle heir.

Share or comment on this article: Rich Kids of Instagram back to school after maxing out daddy’s $500k credit card limit.