Investment
Fortune

Shark Tank’s Kevin O’Leary blasts ‘stupid’ Gen Z habit that could cost them $800K

July 1, 2025
06:17 PM
4 min read
AI Enhanced
investmentmoneywealthfinancial

Key Takeaways

The investor suggests putting your lunch money into an index fund for retirement.

Article Overview

Quick insights and key information

Reading Time

4 min read

Estimated completion

Category

investment

Article classification

Published

July 1, 2025

06:17 PM

Source

Fortune

Original publisher

Key Topics
investmentmoneywealthfinancial

Success·Fortune IntelligenceShark Tank’s Kevin O’Leary blasts ‘stupid’ Gen Z habit that could cost them $800KBY Ashley LutzBY Fortune IntelligenceBY Ashley LutzExecutive Director, Editorial GrowthAshley LutzExecutive Director, Editorial GrowthAshley Lutz is an executive editor at Fortune, overseeing the Success, Well, syndication, and social teams

SEE FULL BIOBY Fortune IntelligenceFortune IntelligenceFortune uses generative AI to help with an initial draft of each Fortune Intelligence story

An editor verifies the accuracy of the information before publishing

SEE FULL BIOInvestor Kevin O'Leary suggests putting your lunch money into an index fund for retirement

Roy Rochlin—Getty ImagesInvestor Kevin O’Leary says Gen Z’s expensive lunch habit today could be costing them a sizeable chunk of their retirement funds in the future

Kevin O’Leary, the outspoken investor and star of ABC’s Shark Tank, is calling out Gen Z’s financial missteps

In a recent interview on The Diary of a CEO, O’Leary sets his sights on a spending habit he says is rampant among Gen Z and could be costing them a fortune over their lifetimes: splurging on expensive lunches and daily luxuries instead of for retirement. “I can’t stand when I see kids making $70,000 a year spending $28 for lunch

I mean, that’s just stupid

Think that in the context of that being put into an index fund and making 8% to 10% a year for the next 50 years,” O’Leary tells host Steven Bartlett

O’Leary breaks down the math to drive his point

If a young person invested just $28 a week—the cost of a single pricey lunch—into a low-cost index fund earning an average annual return of 8%, they’d have nearly $800,000 after 50 years

The implication is : small, habitual expenses add up to massive missed opportunities for wealth accumulation

The cost of small indulgences O’Leary’s warning isn’t new, but it’s particularly relevant as inflation and the high cost of living squeeze younger generations

Millennials and Gen Z, often living in cities with easy access to expensive coffee shops and dery services, are especially ne to these “death by a thousand cuts” spending patterns

Surveys show millennials alone spend up to $1,000 a year on coffee—a habit O’Leary calls “financially dangerous. ” His advice is simple: Brew coffee at, bring lunch to work, and redirect those savings into investments

O’Leary argues that these choices aren’t just frugality—they’re prioritizing long-term financial security over fleeting indulgences

The rules of wealth-building O’Leary’s personal apach to money is rooted in discipline. “One of my rules is never outspend yourself in a 30- or 60-day cycle, ever

I don’t have any debt,” he tells the podcast host

He urges young people to track their income and expenses over a three-month period—a “90-Day Number”—to get a picture of their financial health

He’s also adamant the dangers of emotional spending. “We buy stuff with money, and, more often than not, this stuff becomes a vessel for more spending,” O’Leary writes in his book Cold Hard Truth on Men, Women, and Money

He warns that mixing money with emotions leads to poor decisions, and recommends tricks literally freezing credit cards in a block of ice to curb impulse buys

Succeeding in O’Leary’s financial advice extends beyond personal spending

For aspiring entrepreneurs, he says, jecting confidence is essential. “Can you ject who you are with your eyes and the way you’re standing, can you ject your confidence. “You have to learn how to ject yourself in front of your peers… If you don’t have it, you’re going to fail… it’s before a word is spoken. ” He also stresses the importance of communication and financial literacy: “You need to articulate your idea in 90 seconds or less; the ones that had that aura get there in 30 seconds or less

This is the killer—you got to know your numbers

You don’t know your numbers, you deserve to burn in hell. ” Is O’Leary’s advice realistic

While O’Leary’s message is —ditch unnecessary expenses and invest early—critics point out that saving at the rate he recommends is a tall order for many young Americans facing high rents, student debt, and stagnant wages

Still, O’Leary insists that building wealth is less income and more habits. “Getting into the habit of saving from an early age is essential given that younger Americans can’t rely too heavily on Social Security for retirement,” he says

His bottom line: “Be smart with spending

A person should not let emotional impulse lock them into long-term financial baggage”

For Gen Z, that might mean skipping the $28 lunch today—and retiring with $800,000 tomorrow

Disclaimer: For this story, Fortune used generative AI to help with an initial draft

An editor verified the accuracy of the information before publishing

Introducing the 2025 Fortune 500, the definitive ranking of the biggest companies in America

Explore this year's list.