American Express vs. MutualOne Bank
Comparing American Express and MutualOne Bank for high-yield savings: American Express's High Yield Savings Account pays 3.30% APY while MutualOne Bank's Mo Premium Savings pays 4.07% APY.
See how they compare on rate stability, mobile app ratings, and more below.
The Bottom Line
Who pays more interest on $10,000? American Express pays $330 more than MutualOne Bank annually ($330 vs $0).
Choose American Express if getting the best rate matters most. Choose MutualOne Bank if BBB rating matters to you, you value in-person banking, or you're an Android user.
| Metric | American ExpressHigh Yield Savings Account Feb 21, 2026 | MutualOne BankMo Premium Savings Feb 21, 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® SupportedDaily CompoundingRate Changes Often | FDIC InsuredHigh MinimumGreat iOS AppGreat Android AppIn-Person AccessZelle® SupportedStable Rate |
Comparison Analysis
Comparing American Express vs. MutualOne Bank
Executive Summary
MutualOne Bank's Mo Premium Savings account offers a competitive APY of 4.07%, making it the top choice between the two banks. This account requires a minimum deposit and balance of $20,000, but it has no direct deposit requirement or maintenance fees, providing a straightforward savings option. In comparison, American Express's High Yield Savings Account yields 3.30% APY with no minimum deposit or balance requirements, but it is only available online. Overall, while both accounts have their advantages, MutualOne Bank stands out with its higher APY.
The analysis is based on current Banksparency database records
* This content is provided for informational purposes only; always verify details with the provider.
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.
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: 2/21/2026 ↘︎ 0.20%90d Change | 4.07% Verified: 2/21/2026 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 |
| Compound Frequency | Daily | Monthly |
| Branch Access | None | Yes |
| Account Type | Online Only | Online & Branches |
| Physical Branches | None | Full-service banking offices in Framingham, MA, and Natick, MA |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | ||
| FDIC Insured | YesVerify FDIC | YesVerify FDIC |
| 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) | -5.4 | 0.0 | -0.0 |
Days Since Change | 53 | 162 | 162 |
5-Month High | 3.50% | 0.40% | 4.07% |
5-Month Low | 3.30% | 0.40% | 4.07% |
Adjustments / Mo | 0.37 | 0.00 | 0.00 |
Volatility Score | 0.026 | 0.000 | 0.000 |
How to read these metrics(Click to expand)
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More Comparisons
Compare American Express' APY of 3.30% with other banks
Compare MutualOne Bank's APY of 4.07% with other banks
| Bank Pair | Competitor APY | Min Deposit |
|---|---|---|
| MutualOne Bank vs Ally Bank | 3.20% | $0 |
| MutualOne Bank vs Axos Bank | 4.21% | $0 |
| MutualOne Bank vs Bank of America | 0.01% | $100 |
| MutualOne Bank vs Barclays | 3.85% | $0 |
| MutualOne Bank vs Capital One | 3.30% | $0 |
| MutualOne Bank vs Chase Bank | 0.01% | $0 |
| MutualOne Bank vs Chime | 3.00% | $0 |
| MutualOne Bank vs CIT Bank | 3.75% | $100 |
| MutualOne Bank vs Citibank | 3.20% | $0 |
| MutualOne Bank vs Discover Bank | 3.30% | $0 |
| MutualOne Bank vs EverBank | 3.90% | $0 |
| MutualOne Bank vs Marcus by Goldman Sachs | 3.65% | $0 |
| MutualOne Bank vs Newtek Bank | 4.20% | $0.01 |
| MutualOne Bank vs Openbank | 4.09% | $500 |
| MutualOne Bank vs Pibank | 4.60% | $0 |
| MutualOne Bank vs SoFi Bank | 4.00% | $0 |
| MutualOne Bank vs Synchrony Bank | 3.50% | $0 |
| MutualOne Bank vs Varo Bank | 5.00% | $0 |
| MutualOne Bank vs Wealthfront | 3.95% | $0 |
| MutualOne Bank vs Wells Fargo | 0.05% | $25 |