Mark Cuban Says Retirees Should Always Do These 5 Things With Money

Mark Cuban built a multi-billion-dollar fortune, but his money advice rarely sounds like it came from a billionaire. There is no talk of complex hedging strategies, private equity, or insider access. Instead, Cuban consistently points back to discipline, simplicity, and eliminating the financial mistakes that quietly drain people's savings over time. For retirees who no longer have decades of future paychecks to recover from a bad decision, that unglamorous advice carries extra weight.

Here are the five things Cuban consistently says you should always do with your money, drawn directly from his interviews and writing over the years.

Live below your means

Cuban's foundational principle, repeated across nearly every interview he has given on money, is discipline in spending. "You've got to have discipline in how you spend your money, first of all," he has said. It is not abstract advice for him. After college, Cuban moved into a house with five roommates, lived off macaroni and cheese, and drove an old car, reportedly worth less than $200, until he was 25, long after he could have afforded something nicer.

For retirees, the principle translates directly. A fixed income leaves less room to absorb lifestyle inflation than working years do. Cuban has been blunt about what happens when spending creeps up regardless of income: "Your biggest enemies are your bills. The more you owe, the more you stress," he wrote on his blog, Blog Maverick.

Maintain at least six months of income in savings

Cuban has repeated this number consistently for years, and it might be his single most cited piece of financial advice. "If you don't like your job at some point or you get fired or you have to move or something goes wrong, you're going to need at least six months' income," he told Vanity Fair.

For retirees specifically, this cash cushion serves a slightly different purpose than it does for someone still working. Rather than protecting against job loss, it protects against being forced to sell investments at the worst possible moment, during a market downturn, to cover an unexpected home repair or medical bill. Having liquid savings on hand could make a retirement plan more resilient against bad timing.

Eliminate credit card debt before anything else

Cuban has called high-interest debt one of the most destructive financial positions a person can be in, and he does not soften the language when he talks about it. "If you use your credit card, you do not want to be rich," he said on The Dave Ramsey Show. On using cards responsibly, his standard has always been simple: pay the balance in full every month. "Just recognize that the 18 percent or 20 percent or 30 percent you're paying in credit card debt is going to cost you a lot more than you could ever earn anywhere else," he has said.

The math is hard to argue with. No diversified, low-cost investment strategy reliably returns 20% or 30% a year, which is exactly why Cuban treats debt elimination as the first move, not an afterthought.

Invest in low-cost, diversified index funds rather than trying to pick winners

Cuban is a well-documented advocate of simple, low-cost index investing for the average person. "For those investors not too knowledgeable about markets, the best bet is a cheap S&P 500 fund," he has said. His reasoning rests on a basic acknowledgment that most people, including many professionals, cannot consistently beat the broader market over time, so paying for that attempt rarely pays off.

He has also been skeptical of advice from people whose income depends on you investing a particular way. "Why invest your money in something because a broker told you to? If the broker had a clue, he/she wouldn't be a broker, they would be on a beach somewhere," Cuban has explained.

Keep your strategy simple, and don't chase complex products or quick wins

Cuban has consistently pushed back against complexity for its own sake. He has acknowledged a place for risk, but he draws a firm boundary around it: limit speculative bets, such as individual stocks or cryptocurrency, to roughly 10% of a portfolio, and only after fully understanding what you're buying. "If you're a true adventurer and you really want to throw the Hail Mary, you might take 10% and put it in bitcoin or Ethereum, but if you do that, you've got to pretend you've already lost your money," he told Vanity Fair.

For retirees specifically, this extends to not relying on a single source of income. Preserving optionality, through liquid savings, a diversified portfolio, and avoiding products that promise outsized returns with little explanation of risk, keeps a retiree from being trapped if any one part of their financial picture goes wrong.

Bottom line

The through-line in all of Cuban's advice is consistent, whether he is talking to a 25-year-old just starting out or someone managing a retirement plan on a fixed income. Financial security comes from building and protecting what you already have, not from making big, sophisticated bets. Live below your means. Keep cash on hand. Eliminate debt that costs more than any investment could reasonably earn. Invest simply, and don't chase complexity.

None of it requires a finance degree or insider access, which may be exactly the point. Cuban built his fortune through sales discipline and consistent decision-making, not secret formulas. For retirees, where a financial mistake is harder to recover from than it was at 25, that same discipline may be the most valuable advice available, billionaire or not.