Mark Cuban Says Cash Sitting in Savings Can Cost You — and a Better Account Could Help $140,000 Earn $5,068 More

• $140,000 at 4.00% APY earns about $5,600 over one year, or roughly $467 a month.
• The same $140,000 at 0.38% APY earns about $532 a year, or about $44 a month.
• That creates a $5,068 annual gap, which is why the account your cash sits in matters so much.
• At the national average savings rate of 0.38%, $20,000 earns $76 a year. The same balance could earn up to nine times more with a SoFi Checking and Savings account. See SoFi®'s current rate.

A large cash balance can feel reassuring and underwhelming at the same time. You may have done the hard part by setting money aside, yet the interest can still look like pocket change.

That is the core of Mark Cuban's cash advice. Coverage of his approach has stressed the importance of keeping money available for emergencies and short-term needs, while also cautioning that cash left in a low-yield savings account for too long can carry a hefty opportunity cost.

On a $140,000 balance, the difference between a weak savings rate and a high-yield savings account can amount to thousands of dollars a year. Here is how to tell which dollars may belong in a HYSA and which should stay in the most accessible place.

Cuban is talking about cash

Cuban's point resonates because cash has a practical job that only becomes obvious when rates change. It is meant to be stable, easy to access, and available when life gets expensive. But if your savings account pays very little, that safety can come with a real cost.

You already know saving matters. Cuban is focusing on the cash you do not need right away and asking whether it is sitting in an account that pays you fairly for keeping it there.

High-yield savings can do more

The idea is straightforward: move eligible cash from a low-rate savings account into a high-yield savings account, without turning that cash into an investment. A HYSA is still a savings account, but it is designed to pay more on money you want to keep separate from the stock market.

For example, a high-yield savings account paying 4.00% APY is a realistic benchmark. Using that rate keeps the comparison conservative instead of chasing the highest available offer.

When comparing deposit accounts, annual percentage yield, or APY, shows what an account can earn over a year after compounding is included. That matters because it accounts for interest on both the original deposit and interest already credited.

A standard savings account and a HYSA often serve the same basic purpose: holding money you do not want in checking. The difference is the rate. Once the balance gets large, that difference is no small detail.

$140,000 can mean thousands

Start with the simple side of the math. If $140,000 sits in a high-yield savings account paying 4.00% APY for one year, it earns about $5,600. That comes out to roughly $467 a month in interest while the money remains in cash.

The lower-rate side of the comparison uses 0.38% APY, the national-average figure cited in current savings-rate coverage. On the same $140,000 balance, that rate earns about $532 over one year.

So the comparison looks like this:

• $140,000 at 4.00% APY for one year earns about $5,600.
• $140,000 at 0.38% APY for one year earns about $532.
• The difference is $5,068 over one year.

That gap does not require risky moves or clever timing. It comes from the same balance sitting in two different savings accounts, one paying a competitive cash yield and the other paying far less.

Run the gap on your balance

You do not need $140,000 for the difference to matter. What matters is your current APY, a high-yield savings rate you could reasonably qualify for, and the amount of cash that actually belongs in savings.

Here is the quick math:

Annual gap = savings balance × (high-yield APY - current APY)

For instance, if you have $25,000 in a savings account paying 0.38% APY and compare it with a high-yield savings account paying 4.00% APY, the rate gap is 3.62 percentage points. That works out to $905 over one year.

That does not mean every dollar should be moved. It means your own APY gives you a starting point, and your balance shows whether the payoff is a small win or a meaningful one.

Some cash should stay put

High-yield savings works best for money that needs stability and access, but does not need to sit in checking for tomorrow morning. Think of emergency savings beyond next month's bills, taxes due in a few months, a vacation fund, or money reserved for a home repair.

Money you need this week or this month should stay somewhere you can reach immediately. If rent, utilities, payroll, or a closing wire is already scheduled, do not add transfer timing stress just to chase a slightly better rate.

Money you will not need for five or more years may serve a different purpose. A HYSA is meant for access and cash stability, not long-term growth. So it helps to sort cash into three buckets: immediate bills, near-term goals, and future money. The middle bucket is where high-yield savings often makes the most sense.

The hassles are mostly knowable

The practical details matter because a better rate is not useful if the account creates headaches when you need the cash. External ACH transfers commonly take one to three business days, while some same-day ACH payments can post the same business day if they meet cutoff times.

Deposit insurance is another key point before moving a six-figure balance. The FDIC insures eligible deposits up to $250,000 per depositor, per FDIC-insured bank, per ownership category. The NCUA share insurance limit is $250,000 per share owner, per insured credit union, for each account ownership category.

Then there are the account rules that affect everyday use:

• Minimum opening deposit or minimum balance requirements.
• Monthly maintenance fees.
• Limits on transfers or withdrawals during a statement cycle.
• How quickly you can move money back to checking.
• Whether the rate applies to the full balance or only part of it.

Fees, balance requirements, deposit requirements, transfer methods, processing times, and withdrawal limits can vary by account. Federal rules no longer require a six-withdrawal monthly cap on savings accounts, but some institutions still impose their own limits.

The main tradeoff is that a high-yield savings rate is not fixed. If market rates fall, the yield can drop too. Even so, a variable rate does not change the value of comparing your current APY with what high-yield savings is offering now, because the gap on a large balance can be too large to ignore.

Bottom line

Check your current savings APY, keep immediate bills in checking, and identify the cash you want to keep safe but do not need today. That middle bucket is where Cuban's cash advice becomes a practical decision.

At 4.00% APY, $140,000 earns about $5,600 over one year. At 0.38% APY, the same balance earns about $532, so leaving the money at the lower rate costs about $5,068 annually.

Would You Spend Ten Minutes for $1,465?

That is roughly the annual difference on $40,000 between the national average and the up-to-4.00% rates available now. And ten minutes is not just a figure of speech. You would simply provide basic information such as your name, address, Social Security number, and the account your deposit money is coming from. Because rates move with the market, the only number that matters is today's. Compare the current top accounts here.

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