Why Keeping Emergency Cash in Checking Costs You $15,000 Over a Decade

On episode 168 of the Rich Habits Podcast, co-host Robert Croak made a pitch that sounds almost too easy to be a strategy. He noted, “The easiest stream of income you can build because you’re already probably sitting on the cash. You just need to park it in the right vehicles.” His co-host, Austin, then ran through an example of earning $15,000 in interest over a few years simply by moving emergency and sinking funds out of checking and into a high-yield savings account (HYSA).

The stakes are concrete. With the 10-year Treasury yielding about 4.4% and the Fed funds upper bound near 3.8%, every month a five-figure cash cushion sits in a checking account paying 0.01% to 0.05% is a measurable, ongoing tax on your liquidity. The household savings rate already slid from 6.2% in early 2024 to 4% in Q1 2026, so the lost interest is showing up at exactly the wrong moment.

The verdict: the advice is right, and the $15,000 figure is conservative

The mechanic is the spread between zero-yield cash and the risk-free rate, compounded. A 35-year-old keeps a $30,000 emergency fund. That’s the size needed to cover roughly six months of expenses for a household earning the $68,617 per-capita disposable income figure published by the BEA.

Left in a checking account at 0.05% APY, that $30,000 earns about $150 of interest across a decade. Move the same balance into an FDIC-insured HYSA or a money market fund tracking the Fed funds rate at roughly roughly 4% APY. Over 10 years, the compounded interest works out to about $15,486. It’s the same balance. Same liquidity. Same FDIC coverage. The only variable changed is the account.

Treasury bills and money market funds currently sit in the same zip code. The 10-year Treasury has averaged about 4.2% over the past 12 months, with short-term T-bills typically yielding close to the fed funds upper bound. The spread is wide enough that even a modest emergency fund clears five figures of forgone interest over a normal career.

Where the advice fits, and where Croak’s second stream gets misused

The HYSA move fits everyone holding more than one month of expenses in a big-bank checking account.

The trap is the second leg of Croak’s argument: dividend income. He cites Coca-Cola, Johnson & Johnson, Procter & Gamble, and Verizon as companies that “pay you a percentage of their profits every single quarter just for being a shareholder.” The current yields back that up:

1. Coca-Cola (NYSE: KO | KO Price Prediction) yields 2.6% with a $2.06 annual dividend and a 63rd consecutive year of increases.
2. Johnson & Johnson (NYSE: JNJ) yields 2.3% after a 3.1% raise to $1.34 quarterly, its 64th straight annual hike.
3. Procter & Gamble (NYSE: PG) yields 2.9% and has paid a dividend every year since 1890.
4. Verizon (NYSE: VZ) yields 5.8%, the highest of the four, after a recent bump to $0.7075 quarterly.

Those are real income streams meant for long-horizon money, separate from emergency cash. Verizon’s stock moved in a $37.18 to $50.91 range over the past 52 weeks. P&G is down 8% over the past year. Equity drawdowns frequently coincide with recessions that trigger emergency fund withdrawals. Park dividend stocks in a long-horizon brokerage bucket reserved for money you will not need for years.

The action list

First, total your checking balance and subtract one month of bills; whatever remains is idle cash. Second, open an FDIC-insured HYSA or a Treasury money market fund and move that idle cash this week. Third, keep a separate brokerage account for dividend equity exposure, funded only with money you will not need for at least five years.

Croak’s framing is clean: the income is already yours, the bank is just keeping it. Closing that gap is the highest-return decision most savers will make this year.