You might want to consider spending more time honing your social-media skills after reading this. The Kardashian-Jenners are now considered such valuable influencers on Instagram that brands can pay six-figure sums to be featured in just one post.

Michael Heller, the CEO of digital-marketing firm Talent Resources – the company that arranges many of the reality-TV family's deals – told US Weekly that some companies have been known to pay up to $500,000 to get access to Kim Kardashian's 9.4 million Instagram followers, while sisters Khloé and Kourtney can earn up to $250,000 a post (they have 64.1 million and 54.3 million followers respectively).

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Younger sisters Kendall and Kylie Jenner boast 76.4 million and 89.1 million followers each, so it's perhaps safe to assume they earn something in the $400,000 region.

The products they endorse – from weight-loss teas to waist trainers – "sell out immediately", explains Heller, so brands see it as a guaranteed return on investment.

He adds that social-media posts now make up a significant portion of the Kardashians' wealth – "about 25 per cent of their income". Kim Kardashian also commonly uses social media to promote ventures in which she has equity, such as her range of "kimojis", or the LuMee phone case.

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Heller also iterated that the family only partner with brands that they actually like. "They only endorse what aligns with their lifestyle," he said. "They turn a lot down."

But don't worry about being fooled by not realising a post is sponsored – these women are all pros and label their commercial partnerships accordingly (for the most part). To see which Instagram posts have been paid for, just look out for the tell-tale #ad, #spon or #collab.

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