Cash Drag Cost Calculator
Example: Average idle checking balance: 10000 $ · Checking account APY: 0.01 % · HYSA APY you could earn: 5 % · Years to project: 5 yr
| Annual drag cost | $499 |
| 5-year opportunity cost | $2,758 |
| HYSA balance after period | $12,763 |
| Checking balance after period | $10,005 |
| Rate advantage foregone | 4.99% |
Worked example
A $10,000 checking balance earning 0.01% earns just $1 a year. The same money in a 5% HYSA earns $500. That $499 annual drag compounds over five years into a $2,763 opportunity cost — the difference between $12,763 in a HYSA and $10,005 sitting idle. Moving the money takes about five minutes online.
Frequently asked questions
How much of my checking account should I move to a HYSA?
Keep one to two months of expenses in checking as an operating buffer for bills and debit purchases. Move everything above that threshold to a HYSA. Most online transfers settle in one business day, so accessibility is rarely a real constraint.
Are HYSAs safe?
Yes. High-yield savings accounts at FDIC-member banks are insured up to $250,000 per depositor per ownership category, the same as a traditional savings account. The higher yield comes from lower overhead at online banks, not from additional risk.
Will HYSA rates stay this high?
HYSA rates track the federal funds rate and will vary over time. Even when rates fall, the spread between a HYSA and a typical checking account has historically been large — the Federal Reserve's data shows the national checking average rarely exceeds 0.1% even in high-rate environments. The drag cost shrinks but rarely disappears.
Does moving money to a HYSA affect my checking account protections?
No. FDIC insurance covers both accounts independently (up to $250k each at separate banks). Some people split across two institutions to maximize coverage on larger balances — but for most households a single HYSA at an FDIC-member bank is sufficient.