American Express vs. Colorado Federal Savings 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 | Colorado Federal Savings BankPremier Savings Jan 7, 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® Supported | FDIC InsuredHigh MinimumGreat iOS App |
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. Colorado Federal Savings 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 Colorado Federal Savings Bank's 4.05% APY for its Premier Savings account, with a minimum balance of $50,000.
Colorado Federal Savings Bank pays $75 more than American Express on a $10,000 balance after one year. American Express pays $330, while Colorado Federal Savings Bank pays $405 - an APY advantage for Colorado Federal Savings Bank.
In addition, Colorado Federal Savings Bank also offers 4.00% APY for the High Yield Savings account, with a minimum balance of $1.
Why American Express?
- ✓Higher rated iOS app (4.9 vs 4.3)
- ✓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.
Executive Summary as of
Colorado Federal Savings Bank offers a High Yield Savings account with a competitive APY of 4.00%, making it the winner in this comparison. This account requires a minimum deposit of $1 and has no maintenance fees, while also being online-only. Additionally, Colorado Federal provides a Premier Savings account with a slightly higher APY of 4.05%, but it requires a minimum deposit of $50,000. In contrast, American Express's High Yield Savings Account has an APY of 3.30% with no minimum deposit or maintenance fees, but it falls short compared to Colorado Federal's offerings.
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. 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: 1/7/2026 ↘︎ 0.20%90d Change | 4.05% Verified: 1/7/2026 ↘︎ 0.10%90d Change |
| Product Name | High Yield Savings Account | Premier Savings |
| Minimum Deposit | $0 | $50,000 |
| Min. Balance for APY | $0 | $50,000 |
| Monthly Fee | $0 | $0 |
| Branch Access | None | None |
| Account Type | Online Only | Online Only |
| Direct Deposit Req. | None | None |
| Checking Bundle | No | No |
| Mobile Apps | iOS4.9 Android3.6 | iOS4.3 Android- |
| 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) | -3.2 | -2.6 | -2.6 |
Days Since Change | 8 | 89 | 89 |
11-Month High | 3.80% | 4.25% | 4.25% |
11-Month Low | 3.30% | 4.05% | 4.00% |
Adjustments / Mo | 0.47 | 0.19 | 0.37 |
Volatility Score | 0.031 | 0.022 | 0.022 |
How to read these metrics(Click to expand)
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High Rates (With Checking Bundle)
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