Rates updated · Based on 16 tracked money market accounts
How much are you losing in a typical money market account instead of the best one?
A saver in a typical money market account gives up about $849 a year versus a top-available one — a gap of 3.40 percentage points (0.64% national average vs 4.04% best available) on a $25,000 balance.
Gap Spread
3.40%
percentage points
Best Available
4.04%
APY
National Average
0.64%
APY
What the gap costs you per year
| Balance | Annual interest lost | 5-year cost |
|---|---|---|
| $10,000 | $340 | $1,700 |
| $25,000 | $849 | $4,245 |
| $50,000 | $1,698 | $8,490 |
| $100,000 | $3,397 | $16,985 |
| $250,000 | $8,492 | $42,460 |
How the Money Market Gap Index has moved
Each month's value is recorded as a dated snapshot. The full machine-readable series is published as a public dataset.
| Month | Index value | Gap | Tracked |
|---|---|---|---|
| Nov 2026 | $861/yr | 3.44% | 17 |
| Oct 2026 | $857/yr | 3.43% | 17 |
| Sep 2026 | $853/yr | 3.41% | 17 |
| Aug 2026 | $852/yr | 3.41% | 42 |
| Jul 2026 | $827/yr | 3.31% | 42 |
| Jun 2026 | $852/yr | 3.41% | 42 |
Methodology
Money Market Gap Index = representativeBalance × (bestAvailableAPY − nationalAverageAPY)
representativeBalance is $25,000 — held fixed so the Index moves only when rates move. bestAvailableAPY is the average of the top-3 rates across the 16 actively tracked money market accounts in the SwitchWize rate database. nationalAverageAPY is the FDIC national average rate for this product — what a typical big-bank saver actually earns (updated quarterly).
The dated monthly series is published as a public dataset at /data/indices/mma-spread.
See today's top money market accounts
Compare every tracked money market account ranked by rate, then trust and access.
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