Savings Rates in 2026: What Leaving $25,000 in the Wrong Account Costs a Year
2026-09-18
Short answer: In September 2026 the best high-yield savings accounts pay roughly 4.2% APY while the national average deposit rate is around 0.38%. On a $25,000 balance that is about $958 a year of difference — for money with the same liquidity and the same federal deposit insurance.
The figure
In September 2026 the leading high-yield savings accounts pay around 4.2% APY, with the best one-year CDs a little above that. The FDIC’s national average rate on savings deposits is around 0.38%.
Both numbers describe the same product: a federally insured deposit account, money available on demand, no market risk. The difference is which institution the money happens to be sitting in.
The arithmetic
annual difference = balance × (higher APY − lower APY)On a $25,000 balance held for a year:
| Account | APY | Interest after 1 year |
|---|---|---|
| National average | 0.38% | $95 |
| Leading high-yield | 4.21% | $1,052 |
| Difference | 3.83 pts | $957 |
Compounded over three years, with no deposits or withdrawals:
| Account | Balance after 3 years |
|---|---|
| 0.38% | $25,286 |
| 4.21% | $28,293 |
| Difference | $3,007 |
The $3,007 required no additional saving, no risk, and no change in access to the money. It required an account transfer.
Why this is the cheapest decision on the site
Most money decisions involve a trade-off: a cheaper car is a worse car, a shorter mortgage term is a bigger payment, a higher return means more risk. This one does not. Within federal insurance limits, a deposit dollar at 4.21% and a deposit dollar at 0.38% carry the same risk and the same availability.
That makes idle cash unusual: the loss is invisible because nothing bad happens. The balance goes up, just by 95 instead of 1,052.
What would reverse the conclusion
- A conditional rate you cannot meet. Some leading APYs require a minimum balance, a linked checking account, a monthly direct deposit, or apply only up to a cap. Check what the rate becomes when you miss the condition, because that is the rate you will actually earn in the month you miss it.
- A relationship you are paid for elsewhere. If the low-rate bank waives fees, discounts a mortgage rate or provides something you would otherwise buy, price that benefit before moving. On
25,000 the benefit would need to be worth about80 a month to match the gap. - Money you need this week. Transfers between institutions typically clear in one to three business days. For a working balance, keep enough where it already is.
- Tax. Interest is generally taxable, so the after-tax difference is smaller than $957. It is still the difference between something and almost nothing.
Run your own numbers in the compound growth calculator →