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Kane, who stars in historical drama series Reign as Mary, Queen of Scots, explained how she'd seen pundits on the internet placing her wealth at $4 million (£3.37 million), but that her 'crippling debt' indicated this wasn't the case.
In a first TikTok video, the Australian star said with a snigger: "So I found out today that the internet thinks I'm worth $4 million.
"My crippling debt says otherwise!"
In a follow-up video responding to a fan's question, Kane continued to break it down.
She said: "Generally speaking, SAG [Screen Actors Guild] minimum for a series regular on a network show is $20,000 (£15.1k) per episode.
"Say I did 78 episodes on Reign; that pares out to $1.56m (£1.18m) for four years of work.
"So, assuming that I've made $5m (£3.7m) in my entire career since I started working at 16, here is how that breaks down."
She explained her manager takes 10 percent of these earnings, while five percent goes to her lawyer and another five percent to her business manager. Then there's the 30 percent that goes to taxes, with Kane being a foreign worker in the States.
She continued: "So, I lose 60 percent right off the bat, which leaves me with about $2.2m (£1.6m) over the last 14 years.
"Which if you average it out comes down to $178,000-ish (£134,000) a year which would be fine, a good wage - except I have to pay rent in major cities, sometimes two cities at once."
Kane said there were various other fees she often has to take into account, including $2,000-$3,000 (£1,500-£2,200) a month for a publicist and social media team. Oh, and a stylist that can cost anywhere between $700 and $1,500 (£529-£1,100) PER OUTFIT, along with another $1,000 (£756) or so for hair and make-up artists for red carpet dos.
But before you start feeling too sorry for her, Kane insisted she's not doing too badly - more that she's breaking it down to make people understand more about how actors' 'wealth' sometimes works.
She said: "Just to be clear up, every actor I know saves as much as humanly possible, because most of us go for months or sometimes years at a time between jobs.
"And we do get residuals, but... So, I'm fine, but my savings won't last forever, do you know what I mean?"
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