Proprietary Data
SwitchWize Bank Gap Index
The Bank Gap measures the spread between what top high-yield savings accounts pay and what the national average savings account pays. It quantifies the annual cost of keeping your money at a bank that doesn't compete on rates.
Last updated: April 10, 2026 · Sources: FDIC national rate data, daily bank rate monitoring
Bank Gap Spread
4.39%
percentage points
Best HYSA Rate
4.85%
APY
National Average
0.46%
APY
What the Gap Costs You Per Year
| Savings Balance | Annual Interest Lost | 5-Year Cost |
|---|---|---|
| $10,000 | $439 | $2,195 |
| $25,000 | $1,097 | $5,485 |
| $50,000 | $2,195 | $10,975 |
| $100,000 | $4,390 | $21,950 |
| $250,000 | $10,975 | $54,875 |
Methodology
The Bank Gap Spread is calculated as: Best available HYSA APY minus FDIC national average savings APY. The FDIC publishes national average rates monthly. We monitor top HYSA rates daily from official bank websites.
The “Annual Interest Lost” column shows: Balance × (Bank Gap Spread / 100). This represents the additional interest a consumer would earn by switching from a national-average-paying account to the best available HYSA, assuming the balance remains constant.
This is a simplified model. Actual results vary based on compounding frequency, rate changes over time, account fees, and individual bank rates (which may be above or below the national average).
See your personal Bank Gap
Enter your actual balance and current rate to see exactly what you are leaving on the table.
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