American Express vs. Colorado Federal Savings Bank
Comparing American Express and Colorado Federal Savings Bank for high-yield savings: American Express's High Yield Savings Account pays 3.30% APY while Colorado Federal Savings Bank's Premier Savings pays 4.05% 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 Colorado Federal Savings Bank annually ($330 vs $0).
Choose American Express if getting the best rate matters most, you're an Android user (no Android app for Colorado Federal Savings Bank), or you want Zelle for quick transfers. Choose Colorado Federal Savings Bank if BBB rating matters to you.
| Metric | American ExpressHigh Yield Savings Account Feb 21, 2026 | Colorado Federal Savings BankPremier Savings Feb 21, 2026 |
|---|---|---|
| APY | 3.30% | 4.05% |
Est. Earnings | $5,000+$165 $10,000+$330 $25,000+$825 | $5,000+$0 $10,000+$0 $25,000+$0 |
Min Deposit | $0 | $50,000 |
Snapshot view. Rates subject to change. | ||
| Features | FDIC InsuredNo MinimumsGreat iOS AppZelle® SupportedDaily CompoundingRate Changes Often | FDIC InsuredHigh MinimumGreat iOS AppDaily CompoundingStable Rate |
Market Reality Check
Both of these banks offer rates below the current top tier. The best rates we track are currently above 4.15% APY.
Comparison Analysis
Comparing American Express vs. Colorado Federal Savings Bank
Executive Summary
Colorado Federal Savings Bank stands out with its Premier Savings account, offering a competitive APY of 4.05%. This account requires a minimum deposit and balance of $50,000 but provides attractive returns without any direct deposit requirements. In comparison, American Express offers a High Yield Savings Account with an APY of 3.30%, which is lower than Colorado's top rate. While American Express has no minimum deposit or balance requirements, its yields are significantly less than those of Colorado Federal Savings Bank. Both banks operate online-only and have no maintenance fees.
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?
- ✓Higher rated iOS app (4.9 vs 4.4)
- ✓Fast transfers via Zelle®
Why Colorado Federal Savings Bank?
- ✓Higher potential APY (4.00%-4.05% vs 3.30%)
- ✓Offers 2 different high-yield savings options
— 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
American ExpressAmerican Express's High Yield Savings Account pulls ahead with larger amounts (approx. $825 vs $0/yr).
Best for Simplicity
Colorado Federal Savings BankColorado Federal Savings Bank's Premier Savings offers 4.05% APY with no bundling, direct deposit requirement or caps.
Shared Benefits
Over a 1-year period, Colorado Federal Savings Bank's Premier Savings pays $75 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. Colorado Federal Savings Bank Savings Calculator
You earn $375 more with Colorado Federal Savings Bank than American Express on a $50,000 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+$1,650.00(3.2%)
- Total Contributions$0
- Initial Deposit$50,000
Projected Balance
$51,650.00
Colorado Federal Savings Bank
Premier Savings
Savings Breakdown
- Interest Earned+$2,025.00(3.9%)
- Total Contributions$0
- Initial Deposit$50,000
Projected Balance
$52,025.00
The Banksparency Savings Calculator provides estimated savings growth based on user input and our latest data.
| Feature | American Express | Colorado Federal Savings Bank |
|---|---|---|
| APY | 3.30% Verified: 2/21/2026 ↘︎ 0.20%90d Change | 4.05% Verified: 2/21/2026 Stable (90d) |
| Product Name | High Yield Savings Account | Premier Savings |
| Minimum Deposit | $0 | $50,000 |
| Min. Balance for APY | $0 | $50,000 |
| Monthly Fee | $0 | $0 |
| Compound Frequency | Daily | Daily |
| Branch Access | None | None |
| Account Type | Online Only | Online Only |
| Physical Branches | None | None |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | iOS4.4 Android- | |
| FDIC Insured | YesVerify FDIC | YesVerify FDIC |
| Zelle® Support | Available Requires Amex Rewards Checking; not available for standalone HYSA. | Not Supported |
| BBB Rating | F | A+ |
| Next Steps | Visit SiteVerify at American Express Non-sponsored link to official site | Visit SiteVerify at Colorado Federal Savings Bank Non-sponsored link to official site |
📈 Compare Savings Rates Over Time
Historical Performance
| Metric | American Express | Colorado Federal Savings Bank | |
|---|---|---|---|
| High Yield Savings Account | Premier Savings | High Yield Savings | |
Current APY | 3.30% | 4.05% | 4.00% |
Trend | Stable | Stable | Stable |
Velocity (bps/mo) | -3.6 | -2.4 | -2.4 |
Days Since Change | 53 | 134 | 134 |
12-Month High | 3.70% | 4.25% | 4.25% |
12-Month Low | 3.30% | 4.05% | 4.00% |
Adjustments / Mo | 0.33 | 0.16 | 0.33 |
Volatility Score | 0.038 | 0.022 | 0.023 |
How to read these metrics(Click to expand)
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High Rates (With Checking Bundle)
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