The High-Yield Savings Account Is a Teaser Rate With Better Manners

A Rate Is a Marketing Expense

There is a persistent belief among savers that the interest rate on a deposit account is something like a law of physics. The Fed sets rates, banks pass them through, and your account earns what the market says it should earn.

That is not what a deposit rate is. A deposit rate is a customer acquisition cost, budgeted by the marketing department, priced to bring in new balances and no more. It is the same line item as a sign-up bonus or a television commercial. Once you understand that, everything a bank does with rates stops being confusing and starts being extremely predictable.

The Legacy Account Trick, Fully Documented

Capital One offered a product called 360 Savings. Customers opened it, funded it, and reasonably assumed it was the bank's savings account. In 2019, as rates began climbing, Capital One launched a second product: 360 Performance Savings. Nearly identical name. Nearly identical account. One word of difference.

The new one climbed to 4.35 percent. The old one was left at 0.30 percent. Existing 360 Savings customers were not moved, and were not told. The two products sat side by side inside the same app, and the only way to find out was to notice.

In January 2025 the CFPB sued, alleging Capital One had cost customers more than $2 billion in forgone interest. The Bureau dropped the case the following month. State attorneys general and private class actions picked it up. Whatever the eventual outcome, the mechanism is now a matter of public record, and it is not unique to one bank. It is a standard playbook.

Barclays, Marcus, and several regional banks have run variations of it. The tell is a product name with a modifier bolted on: Performance, Premier, Select, Plus, Advantage. When you see a bank offering two savings accounts whose names differ by one adjective, you are looking at this exact structure.

The Spread, In Dollars You Can Feel

The FDIC's national average rate on savings accounts has sat around 0.40 percent for the better part of two years. That average is dragged down by the giants: Chase Standard Savings and Bank of America Advantage Savings both pay 0.01 percent on ordinary balances. Not 1 percent. One one-hundredth of one percent.

Meanwhile the online tier has been paying somewhere between 3.5 and 4.2 percent through the same stretch.

Put $25,000 against those numbers for a year:

• Chase Standard Savings at 0.01 percent: $2.50
• FDIC national average at 0.40 percent: $100
• A competitive online account at 3.80 percent: $950

Over five years, holding the balance flat, that is a difference of roughly $4,700 between the megabank account and the online one. Same deposit insurance, same $250,000 coverage, same federal guarantee. The only variable is which company's marketing budget you happened to land in.

Scale it up and the number stops being personal. Insured institutions hold something on the order of $8.5 trillion in savings and money market deposit accounts. A one-percentage-point gap across even half of that is $42 billion a year in interest that stays with the banks. That is not an accident of market structure. It is the market structure.

What Happened Last Time Banks Paid Nothing

This has all been run before, at a scale that nearly broke the banking system, and the resolution is instructive.

Under Regulation Q, federal law capped what banks could pay on savings deposits, topping out around 5.25 percent. Through the late 1970s inflation ran into double digits and Treasury bills paid 15 percent. Depositors were being paid a third of the risk-free rate by law, and losing purchasing power every month they stayed.

So they left. Money market mutual funds, a product that barely existed in 1974, held roughly $3 billion in 1977 and over $230 billion by 1982. That is not growth, that is an evacuation. Congress eventually repealed the caps through the 1980 DIDMCA, phased out by 1986, and the industry spent the following decade rebuilding a deposit base it had lost by refusing to pay for it.

The lesson banks took from that episode was not "pay depositors fairly." It was "pay the depositors who are paying attention, and only them." Which is a more sophisticated version of the same behavior, and considerably harder to legislate against.

Deposit Beta, and Why Your Rate Falls Faster Than It Rises

The industry term for pass-through is deposit beta: the share of a Fed rate move that reaches your account. It is not symmetric, and nobody at the bank pretends otherwise on an earnings call.

Through the 2022 to 2024 hiking cycle, the largest banks ran deposit betas in the teens and twenties. The Fed moved 500 basis points; those depositors saw perhaps 80. Online banks, which have no branch network and compete on precisely one number, ran betas north of 70 percent.

On the way down the behavior reverses. Cuts pass through fast, often within days of the announcement, because there's no competitive cost to moving first. Increases arrive when a competitor forces the issue, six or eight weeks later. If you have ever felt that your savings rate drops the week of a Fed cut and rises sometime the following quarter, you were not imagining it. You were observing an asymmetry that shows up plainly in the quarterly filings.

Three Questions That Take Ten Minutes

Rate shopping is not the useful exercise. Verifying what you already own is.

1. Is my rate the same one this bank advertises to a new customer today, on this exact product name? Open the bank's public rate page in a private browser window, where you're not logged in, and compare the product name character for character against your statement. This is the single question that catches the legacy account trick, and it takes about ninety seconds.
2. Is there a balance threshold? Some accounts pay the headline rate only on balances under $25,000. Others pay it only above $100,000. A handful advertise a blended rate that nobody actually receives. The disclosure exists; it just isn't on the page with the big number.
3. Is this an APY or a promotional APY? A promotional rate has an end date, and the account reverts to a standard rate that is frequently the same 0.40 percent you were trying to escape. The end date is in the account disclosure, not in the email that sold you on it.

The Bonus Usually Beats the Rate

Worth noting because it inverts the usual advice. Bank account opening bonuses in the $300 to $700 range have been common for several years, typically requiring a direct deposit and a balance held for 90 days.

A $300 bonus on a $25,000 balance held for one quarter is an effective annualized return of roughly 4.8 percent on top of whatever interest the account pays. Nothing on the rate table competes with that, and it is available to anyone willing to fill out a form twice a year.

Two caveats, both boring and both real. Bonuses arrive on a 1099-INT and are ordinary income, so a $300 bonus is closer to $210 after federal tax at a middle bracket. And ChexSystems tracks new account openings; roughly four to six a year is fine, considerably more starts generating denials.

The Arrangement That Ends the Problem

Keep an operating account wherever it's convenient and hold as little in it as your bill schedule allows. Keep the balance that matters at a separate institution, chosen on rate, with no debit card attached to it.

Then set a calendar reminder for twice a year that says one thing: check my rate against the new-customer rate. Twenty minutes annually. On a $25,000 balance, that is a wage of several hundred dollars an hour for the time invested, which is a better rate than almost anything else you do with a Saturday morning.

The banks are not doing anything illegal here, and mostly they are not even doing anything hidden. They are simply operating on the correct assumption that the overwhelming majority of depositors will never look. Being one of the ones who looks is the entire strategy.

For the head-to-head on where the balance should sit, see Ally vs. Marcus, SoFi vs. Ally, and Discover Bank vs. Ally.