American Express vs. MutualOne Bank
Compare rates, requirements, and features side-by-side to find the best option for you.
| Metric | American ExpressHigh Yield Savings Account Jan 7, 2026 | MutualOne BankMo Premium Savings Jan 7, 2026 |
|---|---|---|
| APY | 3.30% | 4.07% |
Est. Earnings | $5,000+$165 $10,000+$330 $25,000+$825 | $5,000+$0 $10,000+$0 $25,000+$1,018 |
Min Deposit | $0 | $20,000 |
Snapshot view. Rates subject to change. | ||
| Features | FDIC InsuredNo MinimumsGreat iOS AppZelle® Supported | FDIC InsuredHigh MinimumGreat iOS AppGreat Android AppIn-Person AccessZelle® Supported |
Market Reality Check
Both of these banks offer rates below the current top tier. The best rates we track are currently above 4.21% APY.
Comparison Analysis
Comparing American Express vs. MutualOne Bank
As of American Express offers an APY of 3.30% for its High Yield Savings Account, with a minimum balance of $0, compared to MutualOne Bank's 4.07% APY for its Mo Premium Savings account, with a minimum balance of $20,000.
MutualOne Bank pays $77 more than American Express on a $10,000 balance after one year. American Express pays $330, while MutualOne Bank pays $407 - an APY advantage for MutualOne Bank.
In addition, MutualOne Bank also offers 0.40% APY for the Online Savings account, with a minimum balance of 0.
Why American Express?
No distinct advantages found vs MutualOne Bank.
Why MutualOne Bank?
- ✓Higher potential APY (4.07% vs 3.30%)
- ✓Physical branch access (Full-service banking offices in Framingham, MA, and Natick, MA)
- ✓Higher rated Android app (4.4 vs 3.6)
— Key Feature Differences —
Better Returns at $10,000
American ExpressAmerican Express's High Yield Savings Account earns more on smaller deposits (approx. $330 vs $0/yr).
Better Returns at $25,000
MutualOne BankMutualOne Bank's Mo Premium Savings pulls ahead with larger amounts (approx. $1018 vs $825/yr).
Best for Simplicity
MutualOne BankMutualOne Bank's Mo Premium Savings offers 4.07% APY with no bundling, direct deposit requirement or caps.
Shared Benefits
Over a 1-year period, MutualOne Bank's Mo Premium Savings pays $77 more interest on a $10,000 balance than American Express's High Yield Savings Account.
*This calculation assumes current rates remain consistent for 1 year and does not include temporary bonuses.
Executive Summary as of
MutualOne Bank's Mo Premium Savings account stands out with a competitive APY of 4.07%, making it the preferred choice for savers looking to maximize returns on larger deposits, specifically starting from $20,000. In contrast, American Express offers a High Yield Savings Account with an APY of 3.30%, which is suitable for those with no minimum deposit requirement. While both accounts have no maintenance fees and are FDIC insured, MutualOne Bank's product is available both online and in branches, whereas American Express is exclusively online. For simplicity and higher returns on substantial deposits, MutualOne Bank is the clear winner.
The analysis is based on current Banksparency database records
* This content is provided for informational purposes only; always verify details with the provider.
Non-sponsored link to official site
Non-sponsored link to official site
Top Market Contenders
American Express vs. MutualOne Bank Savings Calculator
You earn $154 more with MutualOne Bank than American Express on a $20,000 initial deposit for 1 year*.
*This calculation assumes that APYs remain unchanged for 1 year, and takes into account known promo rate periods, but does not factor in bonuses. You can see how often these banks have changed their rates in the Compare Savings Rates Over Time section below.
American Express
High Yield Savings Account
Savings Breakdown
- Interest Earned+$660.00(3.2%)
- Total Contributions$0
- Initial Deposit$20,000
Projected Balance
$20,660.00
MutualOne Bank
Mo Premium Savings
Savings Breakdown
- Interest Earned+$814.00(3.9%)
- Total Contributions$0
- Initial Deposit$20,000
Projected Balance
$20,814.00
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
| Feature | American Express | MutualOne Bank |
|---|---|---|
| APY | 3.30% Verified: 1/7/2026 ↘︎ 0.20%90d Change | 4.07% Verified: 1/7/2026 Stable (90d) |
| Product Name | High Yield Savings Account | Mo Premium Savings |
| Minimum Deposit | $0 | $20,000 |
| Min. Balance for APY | $0 | $20,000 |
| Monthly Fee | $0 | $0 |
| Branch Access | None | Yes |
| Account Type | Online Only | Online & Branches |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | iOS4.9 Android3.6 | iOS4.9 Android4.4 |
| Zelle® Support | Available Requires Amex Rewards Checking; not available for standalone HYSA. | Available Verified via website and app descriptions. |
| BBB Rating | F | A+ |
| Next Steps | Visit SiteVerify at American Express Non-sponsored link to official site | Visit SiteVerify at MutualOne Bank Non-sponsored link to official site |
📈 Compare Savings Rates Over Time
Historical Performance
| Metric | American Express | MutualOne Bank | |
|---|---|---|---|
| High Yield Savings Account | Online Savings | Mo Premium Savings | |
Current APY | 3.30% | 0.40% | 4.07% |
Trend | Stable | Stable | Stable |
Velocity (bps/mo) | -5.0 | 0.0 | -0.0 |
Days Since Change | 8 | 114 | 114 |
4-Month High | 3.50% | 0.40% | 4.07% |
4-Month Low | 3.30% | 0.40% | 4.07% |
Adjustments / Mo | 0.51 | 0.00 | 0.00 |
Volatility Score | 0.019 | 0.000 | 0.000 |
How to read these metrics(Click to expand)
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High Rates (With Checking Bundle)
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