Kevin O'Leary: This is the age when you should have at least $100,000 saved

Kevin O'Leary: Here's how much money you should save by 33
Kevin O'Leary: Here's how much money you should save by 33

Although "Shark Tank" star Kevin O'Leary says he doesn't like to "peg a number" to certain financial milestones, he does believe there is a point in one's life where they should have at least six figures saved.

"By the time you hit 33 years old, you should have $100,000 saved somewhere. Make that your goal. Thirty-three [and] $100,000," O'Leary tells CNBC Make It.

Why 33? O'Leary says it's the "tipping point" in a person's life when they have to focus on saving money and if they don't, they fall "behind the eight-ball."

While he admits that amount may sound "impossible" to most Americans — research has shown that a majority (57% of Americans, according to 2018 data) don't even have $1,000 saved — he says anyone can do it if you start saving early enough.

"I'll tell you how: You save 20% of your paycheck and you let the market grow at 5% to 7% a year [and] you can get to a $100,000," O'Leary says.

For example, if you're 22 and making a median salary of $48,400 (for new graduates), and you start saving 20% per paycheck, that amounts to $9,680 a year. Even if you keep the same salary and assume no interest, saving that amount for 11 years gets you $106,480 by the age of 33. By investing the same money, and assuming O'Leary's 5% growth, that gives you $144,397 in the same amount of time. (The S&P 500 Index has averaged annual returns of approximately 10% since its inception in 1926.)

"You have to start in your 20s. You just have to, because you want to end up in your 60s with a boatload of cash sitting in investments, so you can kick back and relax a little bit," O'Leary says.

However, while he does advocate for saving as much as you possibly can, he believes its more important to be debt-free by the age of 45 than anything else.

"If you want to find financial freedom, you need to retire all debt — and yes that includes your mortgage," O'Leary told CNBC Make It last year.

"The reason I say 45 is the turning point, or in your 40s, is because, think about a career: Most careers start in early 20s and end in the mid-60s," O'Leary said.

"So, when you're 45 years old, the game is more than half over, and you better be out of debt, because you're going to use the rest of the innings in that game to accrue capital."

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Disclosure: CNBC owns the exclusive off-network cable rights to ABC's "Shark Tank."